Final Decision and Response to Comments Yard 56 (Formerly Pemco Corporation) Baltimore Md


UNITED STATES
ENVIRONMENTAL PROTECTION AGENCY
REGION 3

FINAL DECISION AND RESPONSE TO COMMENTS

Yard 56 (Formerly PEMCO Corporation)
Baltimore, MD

EPA ID NO. MDD003093499

Prepared by

RCRA Corrective Action Section West
Land, Chemicals and Redevelopment Division

September 2024

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e of Contents

Section 1: Introduction	1

Section 2: Facility Background	1

Section 3: Summary of Environmental Investigations	4

Section 4: Human Health Risk Assessment	11

Section 5: Corrective Action Objectives	12

Section 6: Public Comment Period	13

Section 7: Final Remedy	14

Section 8: Financial Assurance	16

Section 9: Declaration	16

List of Acronyms

bgs	Below ground surface

CAO	Corrective Action Objective

CROMP	Containment Remedy Operations and Maintenance Plan

EPA	Environmental Protection Agency

ERM	Environmental Resources Management

FDRTC	Final Decision and Response to Comments

GTA	Geo-Technology Associates, Inc.

HHRA	Human Health Risk Assessment

IC	Institutional Control

MCL	Maximum Contaminant Level

MDE	Maryland Department of the Environment

PAH	Polycyclic Aromatic Hydrocarbon

PCB	Polychlorinated Biphenyl

PCE	Tetrachloroethene

PEMCO	Porcelain Enamel Manufacturing Company

PID	Photoionization Detector

RAP	Response Action Plan

RCRA	Resource Conservation and Recovery Act

RSL	Regional Screening Level

SB	Statement of Basis

SSI	Supplemental Site Investigation

SVOC	Semi-Volatile Organic Compound

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TCE	Trichloroethene

UST	Underground Storage Tank

VCP	Voluntary Cleanup Program

VOC	Volatile Organic Compound

S

|ag/L	micrograms per liter

l-ig/m3	micrograms per cubic meter

mg/kg	milligrams per kilogram

ppm	parts per million

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Section 1: Introduction

The United States Environmental Protection Agency (EPA) is issuing this Final Decision and
Response to Comments (FDRTC) selecting the Final Remedy for soil and groundwater at
Yard 56 located at 5601 Eastern Avenue, Baltimore, Baltimore County, Maryland
(hereinafter referred to as the "Facility"). In September 2020, the EPA issued an FDRTC for
soils at Lots 27C and 28 and this FDRTC applies to soil and groundwater for the entire
Facility. This FDRTC incorporates the Final Remedy selected in the September 2020 FDRTC
for Lots 27C and 28. The EPA is issuing this FDRTC underthe authority of the Solid Waste
Disposal Act, as amended by the Resource Conservation and Recovery Act of 1976, and the
Hazardous and Solid Waste Amendments of 1984, 42 U.S.C. Sections 6901, et seq. (RCRA).

Section 2: Facility Background

The Facility comprises approximately 20.02 acres of land located south of Eastern Avenue
and east of South Umbra Street, in the eastern portion of the City of Baltimore, Maryland
(Figure 1 of Attachment A). The Facility is bordered by Eastern Avenue to the north,
Interstate 95 to the south, commercial properties to the east, and residences to the west.
In general, land uses in the vicinity of the Facility consist of residential and commercial
development, a medical campus, interstate highway corridors, and open fields.

Historically, the Porcelain Enamel Manufacturing Corporation (PEMCO) began operating at
the Facility in the early 20th Century. Prior to PEMCO's operation, the Facility property was
vacant. PEMCO produced specialty glass (frit), ceramic, enamels, and inorganic pigments
until operations ceased in September 2007. The PEMCO manufacturing plant was
decommissioned in December 2007. The main manufacturing building housed smelting
furnaces, where raw materials were heated until molten and then cooled and broken into
small pieces (the frit). Weighing and mixing of raw materials occurred in a color and mixing
building, and raw materials were received at the Facility via truck and rail car. Finished
product was stored in an on-site warehouse building or at an off-site leased warehouse
prior to shipment. A control laboratory monitored production quality, and a separate
research laboratory provided technical assistance. Two railroad spurs historically served the
Facility but have since been removed.

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systems. The treatment plant operated under National Pollutant Discharge Elimination
System discharge permit 97-DP-0317 until April 1, 2002. After that date, the Facility
discharge was routed through the treatment plant's settling basin and then to the municipal
sanitary sewer system.

In addition to regulated materials used in the manufacturing and maintenance processes,
the Facility historically generated waste in the form of off-specification product, recovered
dust, and material settled from process discharge water and surface runoff. Until
approximately 1979, off-specification product, smelter refractories, packaging materials,
and general facility trash were placed in an approximately six-acre industrial landfill (known
as Crystal Hill) on the southern and western portions of the Facility. The landfill was capped
with 6 to 8 feet of clay loam and closed in 1979.

The Facility was originally owned and operated by PEMCO Corporation. The PEMCO name
was retained throughout the Facility's period of industrial operations. In 1955, the PEMCO
plant was sold to Glidden-Durkee Corporation, which became a division of the SCM
Corporation (formerly Smith-Corona Company) in 1967. In 1980, the PEMCO Facility was
sold to Mobay Chemical Corporation. In 1992, Mobay Chemical Corporation sold the
Facility to Miles Inc. In 1995, Miles Inc. sold the facility to Bayer Corporation and in October
1997, the Facility was transferred to the PEMCO Holding Corporation. The Facility ceased all
industrial operations and was shut down in 2007. The Facility was then acquired by TRP-
MCB 5601 Eastern LLC (TRP-MCB) from PEMCO Holding Corporation in 2014.

The Maryland Department of the Environment (MDE) received an application from TRP-
MCB for its Voluntary Cleanup Program (VCP) on September 29, 2014. MDE accepted the
Facility into the VCP on August 12, 2015. TRP-MCB then completed a Response Action Plan
(RAP) for the Facility, pursuant to the requirements of MDE's VCP.1 The RAP detailed the
remedy elements to address impacted soil, soil vapor, and groundwater contamination
within the Facility boundaries in conjunction with the Facility redevelopment. Following a
review and receipt of comments from both MDE and EPA and subsequent revisions, a RAP
that contemplated the redevelopment of the Facility for residential, retail, and commercial
uses was approved by MDE on May 5, 2016.

The owners and each of the Lots that currently comprise the former Facility are as follows:

1 The MDE-approved RAP is considered by the EPA to have satisfied the RCRA Corrective Action requirements

for a Corrective Measures Study (CMS).

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Lot

Acreage

Property Owner

Existing/Planned
Use

Current
Redevelopment
Status per RAP

27

4.223

MCB Y56 Mixed
Use LLC

Existing Residential

apartments &
commercial (retail)

Complete

27B

5.473

MCB Y56 Lot 27B
LLC

Proposed
Commercial

Not yet
redeveloped

27C

1.053

MCB Y56 Road
LLC

Existing Roadway

Complete

27D

1.091

MCB Y56 Office 2
LLC

Existing Commercial
(offices & retail)

Complete

28

7.197

MCB Y56 Retail
LLC

Existing Commercial
(retail)

Complete

29/49/50

1.602*

MCB 5801
Eastern LLC

Existing Commercial
(service station)

Complete

Note: 0.62 acres of this Lot was not historically part of the Facility and, as such, is not subject to RCRA
Correction Action requirements.

Each of TRP-MCB, MCB Y56 Retail LLC, MCB Y56 Road LLC, MCB Y56 Office LLC, MCB Y56
Office 2 LLC, MCB Y56 Mixed Use LLC, MCB Y56 Lot 27B LLC, and MCB 5801 Eastern LLC,
collectively the prior and current owners of the real property that constitutes the Facility
since its acquisition by TRP-MCB in 2014, are collectively referred to herein as "MCB".

The Facility has largely been redeveloped by MCB in two separate phases, respectively
known as "Phase I" and "Phase II." In March 2018, TRP-MCB began demolition of existing
buildings and construction activities at the Facility. Phase I involved the redevelopment of
Lot 27C (the "Road" parcel), Lot 28 (the "Retail" parcel), and Lot 29/49/50 (5801 Eastern-
the gas station parcel) and was completed in late 2020.

Phase II of the Facility's redevelopment began in the fall of 2020 involving Lot 27 (the
"Mixed Use" parcel) and Lot 27D (the "Medical Office Building" parcel), and was completed
in May 2024.

While the redevelopment of Lot 27B has yet to be completed, all grading and related
groundworkon the real property has been completed. Any final use and design of any
structure and improvements on the Lot shall be consistent with and comply with the
requirements of the RAP and this FDRTC. With the pending completion of Phase I of the
Facility's redevelopment in 2020, the EPA developed and issued a Final Decision and

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Response to Comments in September 2020 solely for Lots 27C and 28 of the Facility. This
FDRTC provides a remedy that is consistent with the 2020 FDRTC but is intended to apply to
the entire Facility, not simply Lots 27C and 28.

Section 3: Summary of Environmental Investigations

A. Historical Investigations

The Facility was the subject of several historical investigations that were conducted
between 1984 and 2004 by the EPA, MDE, Bayer AG, and Millennium Holdings, LLC. These
investigations included the collection of two waste samples (one from an on-site dumpster),
41 soil samples, and three ground water samples. In addition, ten surface water samples
and 11 sediment samples were collected from on and off-site sample locations. The samples
were analyzed for a combination of volatile organic compounds (VOCs), semi-volatile
organic compounds (SVOCs), pesticides, metals, and cyanide. The results from these
investigations are consistent with the investigations performed after 2006 as detailed
below.

B. 2006/2007 Site Characterization

PEMCO has performed investigations of environmental conditions at the Facility jointly
under EPA's Facility Lead Program and Maryland's VCP. The work has been performed in
accordance with the Site Characterization Work Plan dated December 6, 2006 (ERM 2006),
which was prepared by Environmental Resources Management, Inc. (ERM) on behalf of
PEMCO. The EPA approved the Work Plan in January 2007. ERM has also undertaken several
focused studies, approved by the EPA and MDE, that augment the Work Plan. The results of
the site characterization have been documented and submitted to the EPA and MDE in a
January 2011 report titled Site Characterization and Risk Assessment Report (ERM 2011).
The Facility characterization included the following: installation of 92 soil borings,
installation of 14 monitoring wells, collection of soil and groundwater samples, installation
of 32 soil gas probes, five rounds of landfill gas field screening, and a methane extraction
and recovery test.

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ESB-45. Iron was detected at 100,000 mg/kg at sample location ESB-31, which is located
adjacent to the southern side of the former main manufacturing building.
Tetrachloroethene (PCE), trichloroethene (TCE), hexachloroethane, and polycyclic aromatic
hydrocarbons (PAHs) exceeded their respective RSLs primarily in the vicinity of the landfill
and south of the manufacturing complex.

The soil gas results indicated that a high concentration of VOCs, predominantly PCE and
TCE, in soil gas is present in the landfill near monitoring wells EGW-10 and EGW-10D.
Several of the soil gas sample points detected methane at concentrations ranging from 26.9
to 99.9 percent by volume.

In December 2006, PEMCO Holding Corporation installed nine shallow monitoring wells,
designated EGW-1 through EGW-9, throughout the Facility. These wells were completed at
depths between 25 to 35 feet below ground surface (bgs), and groundwater was not
encountered in any of these wells. In September 2009, a deep monitoring well, EGW-10,
was installed in the landfill to a depth of approximately 85 feet bgs, and groundwater was
encountered at 67 feet bgs. In November and December 2009, a deeper monitoring well,
EGW-10D, was installed next to EGW-10. EGW-10D was completed at a depth of
approximately 131 feet bgs. In January 2010, two monitoring wells were installed. EGW-9D
was installed next to EGW-9 and was completed at a depth of approximately 55 feet bgs.
EGW-11 was installed at the toe of the landfill at a depth of approximately 30 feet bgs. In
February 2013, monitoring well EGW-12 was installed at the western Facility property
boundary. EGW-12 was installed to a depth of 61 feet bgs and ground water was
encountered at 49 feet bgs. The groundwater samples from EGW-10 contained PCE above
its Maximum Contaminant Level (MCL) of 5 micrograms per liter (|ag/L) (970 |ag/L), TCE
above its MCL of 5 |ag/L (270 |ag/L), cis-l,2-dichloroethene above its MCL of 70 |ag/L (570
l-ig/L), and carbon tetrachloride above its MCL of 5 |ag/L (21 |ag/L). Chloroform was also
detected at EGW-10 at concentrations of less than 10 |ag/L but above its tap water RSL of
0.190 |-ig/L. Initial groundwater samples from EGW-10D, EGW-9D, and EGW-11 indicated
that there were no exceedances of the MCLs for any VOCs. Carbon tetrachloride (7.7 |ag/L)
and PCE (12 |ag/L) exceeded their MCLs (5 |ag/L for both) at EGW-12. Monitoring well EGW-
12 is located west of EGW-10 and concentrations were significantly lower in EGW-12 than
EGW-10.

C. 2014 Supplemental Characterization

A supplemental site characterization was conducted in 2014 by Geo-Technology Associates,
Inc. (GTA) on behalf of TRP-MCB. Activities included soil, groundwater, soil vapor, and
methane sampling and field screening. Forty-five borings (GTA-SB-1 through GTA-SB-45)
were performed for soil sampling and analysis, and 16 borings (GTA-SV-1 through GTA-SV-
16) were advanced for the installation of soil vapor probes. Twenty-two borings were
performed to evaluate the depth of fill material in the landfill orfor installation of methane

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monitoring probes. Monitoring wells GTA-MW-1 through GTA-MW- 5 were also installed as
part of this site characterization.

VOCs did not exceed the EPA RSLs in any of the soil samples analyzed. For SVOCs,
benzo(a)anthracene (RSL of 1.1 mg/kg), benzo(a)pyrene (RSL of 0.11 mg/kg),
benzo(b)fluoranthene (RSL of 1.1 mg/kg), dibenz(a,h)anthracene (RSL of 0.11 mg/kg), and
indeno(l,2,3-cd)pyrene (RSL of 1.1 mg/kg) exceeded their respective RSLs in both surface
and subsurface soil. In surface soil, concentrations ranged from non-detect to 2.6 mg/kg for
benzo(a)anthracene, non-detect to 2.2 mg/kg for benzo(a)pyrene, non-detect to 2.4 mg/kg
for benzo(b)fluoranthene, non-detect to 0.44 mg/kg for dibenz(a,h)anthracene, and non-
detect to 1.2 mg/kg for indeno(l,2,3-cd)pyrene. In subsurface soil, concentrations ranged
from non-detect to 5.8 mg/kg for benzo(a)anthracene, non-detect to 5.0 mg/kg for
benzo(a)pyrene, non-detect to 4.4 mg/kg for benzo(b)fluoranthene, non-detect to 1.1
mg/kg for dibenz(a,h)anthracene, and non-detect to 2.6 mg/kg for indeno(l,2,3-cd)pyrene.
The following metals exceeded their respective RSLs in surface and subsurface soil:

•	Antimony (RSL of 31 mg/kg): concentrations ranging from non-detect to 330 mg/kg

•	Arsenic (RSL of 0.68 mg/kg): concentrations ranging from non-detect to 27 mg/kg

•	Cadmium (RSL of 71 mg/kg): concentrations ranging from non-detect to 2,300 mg/kg

•	Cobalt (RSL of 23 mg/kg): concentrations ranging from non-detect to 190 mg/kg

•	Iron (RSL of 55,000 mg/kg): concentrations ranging from 6,700 to 110,000 mg/kg

•	Lead (RSL of 400 mg/kg) with concentrations ranging from 3.2 to 22,000 mg/kg.

Groundwater samples were collected from newly installed monitoring wells GTA-MW-1
through GTA-MW- 5 as well as monitoring wells EGW-9D, EGW-10, and EGW-12. For
SVOCs:

•	Hexachloroethane exceeded the RSL of 0.33 |ag/L in monitoring wells GTA-MW-3,
GTA-M W-5, and EGW-10 with concentrations ranging from 11 to 670 |ag/L (GTA-
MW-5).

•	Naphthalene exceeded the RSL of 0.17 |ag/L in GTA-M W-5 (29 |-ig/L).

•	Bis(2-ethylhexyl)phthalate exceeded the MCL of 6 |ag/L in GTA-M W-4 (9.5 |-ig/L).

For VOCs:

•	1,1,2,2-tetrachloroethane exceeded the RSL of 0.076 |ag/L in GTA-M W-5 (1.5 |ag/L)
and EGW-10 (1.4 |ag/L).

•	1,1-Dichloroethene exceeded the MCL of 7 |ag/L in GTA-M W-5 (14 |ag/L)and EGW-10
(12 M-g/L).

•	Carbon tetrachloride exceeded the MCL of 5 |ag/L in GTA-M W-2 through GTA-M W-5,
EGW-10, and EGW-12 with concentrations ranging from 10 to 290 |ag/L.

•	Chloroform exceeded the MCL of 80 |ag/L in GTA-M W-2 (190 |ag/L).

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•	PCE exceeded the MCL of 5 jig/L in GTA-MW-1 through GTA-MW-5, EGW-10, and
EGW-12 with concentrations ranging from 14 to 28,000 |ag/L (GTA-MW-5).

•	TCE exceeded the MCL of 5 |ag/L in GTA-MW-2, GTA-MW-3, GTA-MW-5, and EGW-10
with concentrations ranging from 5.7 to 3,400 |ag/L (GTA-MW-5).

•	Vinyl chloride exceeded the MCL of 2 |ag/L in GTA-MW-5 (38 |ag/L) and EGW-10 (4.7
Mg/L)-

•	cis-l,2-Dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5 (12,000 |ag/L)
and EGW-10 (11,000 |ag/L).

•	trans-l,2-Dichloroethene exceeded the MCL of 100 |ag/L in GTA-MW-5 (310 |ag/L)
and EGW-10 (290 jjg/L).

For dissolved metals:

•	Antimony exceeded the MCL of 6 |ag/L in GTA-MW-5 (17 |-ig/L).

•	Cobalt exceeded the RSL of 6 |ag/L in GTA-MW-1 through GTA-MW-5 with
concentrations ranging from 20 to 65 |-ig/L.

•	Iron exceeded the RSL of 14,000 jig/L in GTA-MW-4 (15,000 |ag/L) and GTA-MW-5
(18,000 ng/L).

•	Lead exceeded the MCL of 15 |ag/L in GTA-MW-5 (1,400 |-ig/L).

•	Manganese exceeded the RSL of 430 |ag/L in GTA-MW-1 (1,400 |ag/L) and GTA-MW-2
(540 M-g/L).

•	Sodium exceeded the MCL of 1,000 |ag/L in all monitoring wells with concentrations
ranging from 21,000 to 670,000 |ag/L.

•	Total chromium exceeded the MCL of 100 |ag/L in GTA-MW-4 (320 |-ig/L).

VOCs (carbon tetrachloride, chloroform, PCE, 1,1,2-trichloroethane, TCE, and vinyl chloride)
were detected in soil vapor beneath the Facility above their MDE Tier 1 Values. Carbon
tetrachloride (MDE Tier 1 of 94 micrograms per cubic meter [|-ig/m3]) was found at
concentrations ranging from non-detect to 7,600 |-ig/m3. Chloroform (MDE Tier 1 of 24
l-ig/m3) was found at concentrations ranging from non-detect to 2,300 |-ig/m3. PCE (MDE
Tier 1 of 840 |-ig/m3) was found at concentrations ranging from non-detect to 380,000
l-ig/m3. TCE (MDE Tier 1 of 42 |-ig/m3) was found at concentrations ranging from non-detect
to 23,000 |-ig/m3. 1,1,2-Trichloroethane (MDE Tier 1 of 4.2 |-ig/m3) was found at
concentrations ranging from non-detect to 6.5 |-ig/m3. Methane was detected in the central
portion of the former landfill known as Crystal Hill as high as 61.7% by volume.

D. Supplemental Investigations

As part of the RAP, several supplemental site investigations were performed at the Facility,
as summarized below.

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In July 2017, GTA performed a Supplemental Site Investigation (SSI) of the suspect
polychlorinated biphenyl (PCB) underground storage tank (UST) area on behalf of TRP-MCB.
This SSI was performed on the northeastern portion of the Facility, in the vicinity of the
former control laboratory building. A geophysical evaluation in the asphalt and concrete-
paved areas located in the vicinity of the control laboratory building did not identify
anomalies that were considered consistent with an UST. Ten soil borings were installed and
sample results did not identify PCBs.

The SSI also further evaluated lead and cadmium soil impacts previously identified at three
locations (GTA-SB-11, GTA-SB-26, and GTA-SB-41) on the central and southeastern portions
of the Facility. Lead was detected in each of the soil samples obtained but was belowthe
RSL. Cadmium was not detected above the laboratory reporting limit.

In March 2018, TRP-MCB installed six additional soil vapor points to further evaluate
impacts surrounding soil vapor sampling location GTA-SV-5. PCE and TCE were detected
above the screening levels, with PCE concentrations ranging from 3.4 to 3,600 |ag/m3 and
TCE concentrations ranging from non-detect to 150 |-ig/m3. Impacts are primarily located
beneath the location of the former Warehouse and Main Manufacturing Building.

TRP-MCB performed additional groundwater gauging, sampling, and analysis in March 2018,
priorto building demolition and groundwater monitoring well abandonment which had
been approved by the EPA and MDE. Five monitoring wells (GTA-MW-1 through GTA-MW-
5) installed in 2014 and three wells, previously installed between 2006 and 2009 (EGW-9D,
EGW-10, and EGW-12), were assessed and determined to be intact. The eight wells, except
for EGW-9D, which was damaged and not sampled in 2018, contained exceedances of the
MCLs and/orTapwater RSLs for VOCs, SVOCs, and TAL metals. 1,1-Dichloroethene was
detected above the MCL of 7 |ag/L in GTA-MW-5 (10 |ag/L) and EGW-10 (13 |ag/L); carbon
tetrachloride exceeded the MCL of 5 |ag/L in each well except GTA-MW-1 with
concentrations ranging from 5.4 to 410 |ag/L; chloroform exceeded the MCL of 80 |ag/L in
GTA-MW-2 (380); PCE exceeded the MCL in GTA-MW-2 (720 ng/L), GTA-MW-3 (12 |ag/L),
GTA-MW-5 (2,800 |ag/L), EGW-10 (5,100 |ag/L), and EGW-12 (7.8 |ag/L); TCE exceeded the
MCL in GTA-MW-2 (170 |ag/L), GTA-MW-5 (1,500 |ag/L), and EGW-10 (3,200 |ag/L); cis-1,2-
dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5 (4,700 |ag/L) and EGW-10
(13,000 |-ig/L); and trans-l,2-dichloroethene exceeded the MCL of 100 |ag/L in GTA-MW-5
(180 |-ig/L) and EGW-10 (310 |ag/L). Dissolved cobalt, sodium, and lead were also detected
above the MCLs and/orTapwater RSLs. The monitoring wells installed during the Phase I
investigation in 2006 were either abandoned priorto 2014 or were installed too shallow
and did not yield any groundwater.

In November 2019, GTA initiated an additional methane evaluation on behalf of MCB.
Twenty-one methane probes were installed within and surrounding the landfill. Five rounds
of methane screening were conducted between November 15, 2019 and October 8, 2021.

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The areas where methane was detected corresponded to areas within the landfill, with the
areas of highest methane concentrations (GTA-CMM1 and GT-CMM2) corresponding to an
area of high methane concentrations observed during prior evaluations.

E. Natural Attenuation

Natural attenuation entails a variety of physical, chemical and/or biological processes that
reduce the mass, toxicity, mobility, volume, or concentration of constituents of concern.
These processes are classified as degradation (biological or chemical), sorption (chemical)
and dispersion, diffusion, dilution, and volatilization (physical).

Although temporal ground water sampling data is limited to multiple sampling events in fall
2009, winter 2010, February 2013, January 2015, and March 2018, it is reasonable to
interpret the existing ground water data as indicative of attenuating conditions. The
highest detections are of PCE, TCE, and cis-l,2-dichloroethene at the source area in wells
GTA-MW-5 and EGW-10. PCE, TCE, and cis-l,2-dichloroethene concentrations appear to be
decreasing in monitoring well GTA-MW-5. In addition, detections of cis-l,2-dichloroethene
at GTA-MW-1 through GTA-MW-5 and EGW-10 and detections of vinyl chloride at GTA-MW-
5 and EGW-10, along with PCE and TCE, is indicative of natural biodegradation of PCE. cis-
1,2-Dichloroethene and vinyl chloride are produced through the natural reductive
dechlorination of PCE and TCE.

F. Interim Measures

Soil sampling conducted in 2018 by GTA on behalf of MCB identified PCB impacts in two
areas: (1) an enclosed transformer room within the northeastern portion of the former
warehouse building; and (2) a portion of a concrete floor slab, adjacent to a former
transformer pad, in the west-central portion of the color mixing building. The transformers
were removed sometime in the past, but it is not known when. In November 2018, PCB-
contaminated soil and concrete were delineated in these areas and placed in roll-off
dumpsters for off-site disposal. Approximately 164 tons of material were disposed of at an
off-site disposal facility.

In 2018, TRP-MCB identified and removed three 8,000-gallon diesel USTs (identified as UST
Nos. 2-4), two 500-gallon heating oil USTs (identified as UST Nos. 5 and 6), and a 550-gallon
heating oil UST (identified as UST No. 8) and associated petroleum-impacted soils were
identified and removed. It should be noted that UST Nos. 1 and 7 had been previously
removed from the Facility. A total of 437.04 tons of petroleum impacted soil was removed
during all excavation activities described above.

During redevelopment activities throughout 2018 to 2023, petroleum-impacts were
discovered in certain areas of the Facility. Between December 2018 and March 2019, two
areas of petroleum-impacted soil were discovered in sewer and storm drain utility runs
located on the southeastern and central portions of the Facility. The petroleum-impacted
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soils in the southeastern portion of the Facility were observed approximately 1-foot bgs and
consisted of gray clays and silts that exhibited a petroleum odor. Elevated Photoionization
Detector (PID) readings were not observed. Stained soil and petroleum odors were not
observed below 5 feet bgs, where native clays were encountered. The approximate area of
excavated petroleum-impacted soil that was removed was irregularly shaped, but
approximately 51 feet long, 18 feet wide, and 5 feet deep. The petroleum-impacted soil was
staged on and covered with plastic adjacent to the excavation prior to future off-site
disposal. No liquids were encountered in the excavation.

In April 2019, a second area of petroleum-impacted soil was discovered in a water line
utility run located on the central portion of the Facility. The petroleum-impacted soil was
observed approximately 1-foot bgs. Observed PID readings ranged between 50 and 100
parts per million (ppm). Stained soil and petroleum odors were not observed below 3 feet
bgs, where native clays were encountered. The area of excavated petroleum-impacted soil
that was removed measured approximately 20 feet long, 10 feet wide, and 3 feet deep. The
petroleum-impacted soil was staged on and covered with plastic adjacent to the excavation
prior to future off-site disposal. No liquids were encountered in the excavation.

In May and June 2019, a third area of petroleum-impacted materials were encountered
during footing excavations. An approximately 75-foot section of petroleum-impacted soil
was discovered in May 2019. In June 2019, two approximately 25-foot sections of
petroleum-impacted soil were discovered north and south of the original 75-foot section.
This material was found approximately 3 feet bgs and consisted of an approximately 1.5-
foot layer of stone, brick, and concrete mixed with soil (petroleum-impacted material).

Clays were observed above and below this material, and the clays did not display indications
of staining or unusual odors. The petroleum-impacted material exhibited petroleum odors,
and PID readings were between 30-60 ppm. No liquids were observed in the excavation.
Petroleum-impacted soils were not observed west of the excavation during prior utility
installation activities, nor were they observed further east during the installation of interior
column footings.

In December 2023, a fourth area of petroleum-impacted soil was identified along the
western property boundary, in a former parking area adjacently east of the Umbra Street
Alley. The approximate area of excavated petroleum-impacted soil was 15-foot wide, by
450-foot long, and 1 foot deep. The petroleum-impacted soil was directly loaded for off-site
disposal. In addition, landfill debris that exhibited an unusual odor was encountered within
an approximate 85-foot-long section of sewer utility installation, generally within the
central portion of the landfill. This area generally corresponds to a VOC-impacted area
identified during prior evaluations. The odoriferous materials were generally located
beneath approximately two feet of clay material and consisted of a gray granular material
with some clay mixed with paper and plastic debris. This material was encountered to a

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depth of approximately 11.5 feet below existing grades, where more granular soil and clays
mixed with construction debris were encountered. The utility trench generally measured 5
feet wide, with the upper portions sloped outward for safety. A total of 717.31 tons of VOC-
and lead-impacted soil was removed during the excavation activities described above.

Footnotes for the tables are provided in Table 1 of Attachment A. Soil borings locations are
shown on Figures 2A and 2B of Attachment A and results are provided in Tables 2 through
4 of Attachment A. Monitoring well locations are shown on Figures 3A and 3B of
Attachment A and results are provided in Tables 5 through 7 of Attachment A. Soil vapor
sample locations are shown on Figures 4A and 4B of Attachment A and results are provided
in Table 8 of Attachment A.

Section 4: Human Health Risk Assessment

A Human Health Risk Assessment (HHRA) was performed under the assumption the entire
Facility would be redeveloped for non-residential use. The results of the HHRA indicate that
there is no unacceptable risk to current or future adolescents or adult trespassers or visitors
at any of the undeveloped areas of the Facility. Further, there was no unacceptable risk
identified for current or future off-site residents or industrial workers. The HHRA identified
a potential for unacceptable risk to the following human health receptors under current or
future industrial use conditions of the Facility:

• Presuming future redevelopment of the Facility property, exposure of future
building occupants to soil gas via vapor intrusion could result in unacceptable risk to
human health.

• Exposure to impacted soils within the approximate extent of VOC impacts (identified
on Figure 2A of Attachment A) could result in an elevated non-carcinogenic hazard
and carcinogenic risk to the construction/utility worker if unprotected exposure
were to occur.

• Exposure to soil vapors in a trench within the approximate extent of VOC impacts
(identified on Figure 2A of Attachment A) could result in an elevated carcinogenic
risk to the construction/utility worker.

• Groundwater beneath the Facility contains VOCs and metals at concentrations
above the EPA tapwater RSLs and MCLs, which could pose an unacceptable risk to
human health receptors at the Facility if used for potable or non-potable purposes.
Currently, there are no groundwater supply wells on the Facility.

• Exposure to deep on-site groundwater for non-potable purposes could result in an
elevated carcinogenic and noncarcinogenic risk for industrial workers.

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The HHRA also concluded that if the Facility is to be redeveloped either as industrial or
residential, controls would be required to eliminate the unacceptable risks identified above.
The final remedy selected in this FDRTC includes these controls. As discussed in the
Migration of Contaminated Groundwater Under Control Environmental Indicator for the
Facility, analytical results from EGW-12 indicate low levels of VOCs are present in
groundwater. The concentrations of carbon tetrachloride (6.8 |ag/L) and PCE (7.8 |ag/L)
detected in EGW-12 are significantly lower than at the center of the property (at EGW-10)
and are likely attributable to mixing of waters beneath the landfill where flow from the west
and east converge at a former stream trace. The risk to off-site receptors west of EGW-12
due to vapor intrusion has been assessed based on the prior ESG-30 and ESG-31 soil gas
results and found to be negligible. ESG-30 and ESG-31 are located near EGW-31 and
benzene in ESG-31 (696J2 |-ig/m3) was the only constituent that exceeded the MDE Tier 1
value of 72 |-ig/m3. VOCs were also non-detect at downgradient monitoring well EGW-9D,
except for PCE at 1.1 |ag/L, which is below the MCL of 5 |-ig/L. These data, along with the soil
gas results collected as part of the site characterization indicate that VOCs are not migrating
towards the property boundary at levels of concern. With the exception of a single
detection, methane has not been detected in any monitoring point located along the
perimeter of the Facility.

Section 5: Corrective Action Objectives

The EPA's Corrective Action Objectives (CAOs) are as follows:

1. Soil

The EPA has determined that contaminants currently remain in Facility soils above
acceptable risk levels protective of human health and the environment for
residential use. Therefore, the EPA's proposed Corrective Action Objective for
Facility soils is to control exposure to the hazardous constituents remaining in
surface soils by requiring compliance with and maintenance of engineering controls
and land use restrictions.

2. Groundwater

2 J is a laboratory qualifier indicating the analyte concentration is estimated.
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the Safe Drinking Water Act and codified at 40 C.F.R. Part 141. The EPA's Corrective
Action Objectives for Facility groundwater are 1) to restore the groundwater to
drinking water standards, otherwise known as MCLs, or to the relevant RSL for tap
water for contaminants that do not have an MCL and, 2) until such time as drinking
water standards are restored, to control exposure to the hazardous constituents
remaining in the groundwater by requiring the continued implementation of the
groundwater monitoring program and compliance with and maintenance of
groundwater use restrictions.

3. Soil Vapor

The EPA's CAO for soil vapor at the Facility is to control human exposure to
contaminated subsurface vapor in buildings/structures so that indoor air quality
within any such buildings/structures is protective of human health for current and
anticipated future uses.

Section 6: Public Comment Period

On June 13, 2024, the EPA proposed a remedy consisting of the implementation of
engineering controls; land and groundwater use restrictions implemented by an
enforceable document such as an order and/or an Environmental Covenant to control
exposure to contaminated soil and groundwater; and long-term groundwater monitoring.
Consistent with public participation provisions under the RCRA, the EPA requested
comments from the public on the proposed remedy as described in the Statement of Basis
(SB). The commencement of a thirty (30)-day public comment period was announced in the
Baltimore Sun newspaper and on the EPA Region 3 website. The public comment period
ended on July 13, 2024.

During the public comment period, the EPA received comments from MCB, that provided
clarifying information on the Facility background, ownership, and relationship to the EPA's
September 2020 FDRTC for Lots 27C and 28 (Attachment B) which has been included in the
FDRTC. The comments and the EPA's responses are provided in Attachment C.

The EPA has determined that the public comments do not substantially change, or cause
reason to change, the proposed remedy in the SB and therefore, the Final Remedy is
unchanged from the proposed remedy. The SB is incorporated by reference into this FDRTC
as Attachment A.

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Section 7: Final Remedy

The EPA has determined that corrective measures are necessary at the Facility to address
residual contamination of soil, groundwater, and soil vapor. The EPA's Final Remedy for the
Facility consists of the following components:

1.	Soil: The EPA's final remedy for Facility soil is to maintain the existing cover system
on the Facility (hardscaped or landscaped cap with markerfabric above the
contaminated soil) that controls, minimizes, or eliminates post remedial action
migration of hazardous waste, hazardous constituents, leachate, contaminated run-
off, or hazardous waste decomposition products to the ground or surface waters or
to the atmosphere, to the extent necessary to protect human health and the
environment. The remaining area (Lot 27B) of the Facility to be capped (Figure 5 of
Attachment A) includes a small portion undergoing redevelopment (the rest of the
Facility has already been capped).

2.	Groundwater: The EPA's final remedy for Facility groundwater consists of monitored
natural attenuation until MCLs or, if no MCLs exist, the RSLs for tap water are met.
Monitoring wells shall be installed pursuant to an EPA-approved Work Plan and
long-term groundwater monitoring is required. Additionally, EPA's Final Remedy for
groundwater also includes continued compliance with the Environmental Covenant
already recorded in land records for each of Lots 27, 27C, 27D, 28 and 29/49/50 to
prevent exposure to contaminants while levels remain above MCLs or RSLs, as
applicable.

3.	Soil Vapor:

a.	A vapor intrusion control system, the design of which shall be approved in
advance in writing by the EPA and MDE, shall be installed in each new
structure on the Facility, unless it is demonstrated to EPA and MDE that
vapor intrusion does not pose a threat to human health and EPA and MDE
provide prior written approval that no vapor intrusion control system is
needed.

b.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

c.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

d.	Atmospheric pressure differentials and other factors such as soil
permeability, moisture content, etc., may cause accumulation of methane

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beneath hardscaped paved areas, and shall be addressed by installation of
vapor vents located at light pole locations within the parking lots.

4. The EPA is requiring implementation and/or continued compliance with the
following land and groundwater use restrictions:

a.	Groundwater at the Facility shall not be used for any purpose other than the
operation, maintenance, and monitoring activities currently being conducted
at the Facility and activities required by the EPA and MDE, unless it is
demonstrated to the EPA and MDE that such use will not pose a threat to
human health or the environment or adversely affect or interfere with the
final remedy, and the current Facility owner obtains prior written approval
from the EPA and MDE for such use.

b.	No new wells shall be installed on the Facility unless it is demonstrated to the
EPA and MDE that such wells are necessary to implement the final remedy
for the Facility, and the current owner obtains prior written approval from
the EPA and MDE to install such wells.

c.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

d.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

e.	Compliance with the EPA and MDE-approved Containment Remedy
Operations and Maintenance Plan (CROMP) and Health and Safety Plan. The
CROMP will require the current Facility owner to maintain the integrity of the
vapor intrusion control systems and all caps and covers on the Facility by
conducting regular periodic inspections (no less frequently than once per
year), making timely repairs if needed, and maintaininga record of such
inspection and maintenance. The CROMP will also establish the
documentation, reporting, and notification methods that will be used to
implement, monitor compliance, and ensure the CROMP remains in place
and effective.

f.	All earthmoving activities on the Facility, including excavation, grading,
and/or utility construction, shall be conducted in compliance with an EPA
and MDE-approved CROMP to ensure that the activity will not pose a threat
to human health and the environment or adversely affect or interfere with
the covered areas.

g.	On an annual basis and whenever requested by the EPA or MDE, the current
Facility owner shall submit to MDE and the EPA a written certification stating

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whether the owner is maintaining and complying with all groundwater and
land use restrictions.

h. The Facility shall not be used in a way that will adversely affect or interfere
with the integrity and protectiveness of the final remedy.

The land and groundwater use restrictions necessary to prevent human exposure to
contaminants at the Facility will be implemented through enforceable Institutional Controls
(ICs) such as an order and/or an Environmental Covenant pursuant to the Maryland Uniform
Environmental Covenants Act, §§ 1-80 I through 1-815 of the Environment Article,
Annotated Code of Maryland to be recorded with the land records of the Circuit Court for
Baltimore City forthe Facility property. If the EPA determines that additional monitoring
activities, institutional controls, or other corrective actions are necessary to protect human
health or the environment, the EPA has the authority to require and enforce such additional
corrective actions through an enforceable mechanism which may include an order or
Environmental Covenant, provided any necessary public participation requirements are
met. If any individual with an interest in the Facility property believes that information
shows that any use restrictions proposed and later selected by the EPA are no longer
necessary to protect public health and the environment, the individual may submit such
information to the EPA for consideration. The EPA can change any such restriction if it
determines it is no longer necessary, after any required public comment period.

Section 8: Financial Assurance

MCB will be required to demonstrate and maintain financial assurance for completion of
the remedy pursuant to the standards contained in Federal regulations 40 C.F.R. § 264.145
and 40 CFR § 264.143. The amount of financial assurance will be based on the estimated
construction and long-term monitoring and maintenance costs for the final remedy that
MCB shall provide to the EPA for evaluation and approval.

Section 9: Declaration

Based on the Administrative Record compiled forthe Corrective Action at the Facility, the
EPA has determined that the Final Remedy selected in this Final Decision and Response to
Comments is protective of human health and the environment.

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n AX/ID	Digitally signed by

L/nVIL/	DAVID CAMPBELL

CAMPBELL

		Date:.

David Campbell, Director

Land, Chemicals, and Redevelopment Division

US EPA, Region 3

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Attachment A

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UNITED STATES
ENVIRONMENTAL PROTECTION AGENCY
REGION 3

STATEMENT OF BASIS

Yard 56 (Formerly PEMCO Corporation)
Baltimore, MD

EPA ID NO. MDD003093499

Prepared by

RCRA Corrective Action Section West
Land, Chemicals and Redevelopment Division

May 2024

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e of Contents

Section 1: Introduction	1

Section 2: Facility Background	2

Section 3: Conceptual Site Model	3

Section 4: Summary of Environmental Investigations	4

Section 5: Human Health Risk Assessment	11

Section 6: Corrective Action Objectives	12

Section 7: Proposed Remedy	13

Section 8: Evaluation of Proposed Remedy	16

Section 9: Financial Assurance	20

Section 10: Public Participation	21

Section 11: Signature	21

Section 12: Index to Administrative Record	22

Section 13: Attachments	22

List of Acronyms

amsl	Above mean sea level

AR	Administrative Record

bgs	Below ground surface

CAO	Corrective Action Objective

EC	Environmental Covenant

EJ	Environmental Justice

EPA	Environmental Protection Agency

ERM	Environmental Resources Management

GTA	Geo-Technology Associates, Inc.

HHRA	Human Health Risk Assessment

HSWA	Hazardous and Solid Waste Amendments

IC	Institutional Control

MCL	Maximum Contaminant Level

MDE	Maryland Department of the Environment

O&M	Operations and Maintenance

PAH	Polycyclic Aromatic Hydrocarbon

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PCB

Polychlorinated Biphenyl

PCE

Tetrachloroethene

PEMCO

Porcelain Enamel Manufacturing Company

PID

Photoionization Detector

RAP

Response Action Plan

RCRA

Resource Conservation and Recovery Act

RSL

Regional Screening Level

SB

Statement of Basis

SSI

Supplemental Site Investigation

SVOC

Semi-Volatile Organic Compound

TCE

Trichloroethene

UST

Underground Storage Tank

VCP

Voluntary Cleanup Program

VOC

Volatile Organic Compound

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Section 1: Introduction

The United States Environmental Protection Agency (EPA) has prepared this Statement of
Basis (SB) to solicit public comment on its proposed remedy for Yard 56 located at 5601
Eastern Avenue, Baltimore, Baltimore County, Maryland (Facility).

The EPA's proposed remedy in this SB consists of the implementation of engineering
controls, monitored natural attenuation of groundwater, land and groundwater use
restrictions implemented through enforceable Institutional Controls such as an order
and/or an Environmental Covenant to control exposure to contaminated soil and
groundwater, and long-term groundwater monitoring. This SB highlights key information
relied upon by the EPA in proposing its remedy.

The Facility is subject to the EPA's Corrective Action Program under the Solid Waste
Disposal Act, as amended by the Resource Conservation and Recovery Act (RCRA) of 1976,
and the Hazardous and Solid Waste Amendments (HSWA) of 1984, 42 U.S.C. §§ 6901 et seq.
The Corrective Action Program requires that owners and/or operators of facilities subject to
certain provisions of RCRA investigate and address releases of hazardous waste and
hazardous constituents, usually in the form of soil or groundwater contamination, that have
occurred at or from their property. Environmental Justice (EJ) and Climate Adaptation
information were considered during the RCRA Corrective Action decision-making process;
this Facility is not considered a concern for EJ or Climate Adaptation.

The EPA is providing a thirty (30) day public comment period on the EPA's proposed remedy
described in this SB. The EPA will evaluate comments received after the public comment
period has ended and may modify its proposed remedy based on such comments. If the
final remedy is substantially unchanged from the one proposed, the EPA will issue a Final
Decision and inform all persons who submitted written comments or requested notice of
the EPA's final determination. If the final remedy is significantly different from the one
proposed, the EPA will issue a public notice explaining the new remedy and will reopen the
comment period. The EPA will respond in writing to all relevant comments received during
the comment period.

Information on the Corrective Action program and the Government Performance and
Results Act Environmental Indicator Determinations for the Facility can be found by
navigating to https://www.epa.gov/hwcorrectiveactioncleanups/hazardous-waste-cleanup-
yard-56-formerlv-pemco-corporation-baltimore.

The EPA has compiled an Administrative Record (AR) containing all documents, including
data and quality assurance information, upon which EPA's proposed remedy is based. See
Section 10, Public Participation, below, for information on how you may review the AR.

Statement of Basis

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Section 2: Facility Background

The Facility comprises approximately 19.97 acres of land located south of Eastern Avenue
and east of South Umbra Street, in the eastern portion of the City of Baltimore, Maryland
(Figure 1). The Facility is bordered by Eastern Avenue to the north, Interstate 95 to the
south, commercial properties to the east, and residences to the west. In general, land uses
in the vicinity of the Facility consist of residential and commercial development, a medical
campus, and open fields.

An on-site wastewater treatment plant operated at the Facility until 2002. This wastewater
treatment plant, located southeast of the Color and Mixing building, treated Facility
discharge prior to disposal to a settling pond located in the southeast portion of the Facility
until the early 1960s. In the mid-1960s, the portion of the Facility containing the settling
pond was sold to the Exxon Company for use as part of a large tank farm, at which time the
Facility discharge was routed from the wastewater treatment plant to local stormwater
systems. The treatment plant operated under National Pollutant Discharge Elimination
System discharge permit 97-DP-0317 until April 1, 2002. After that date, the Facility
discharge was routed through the treatment plant's settling basin and then to the municipal
sanitary sewer system.

Statement of Basis

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The Facility was originally owned and operated by PEMCO Corporation. The PEMCO name
has been retained throughout the Facility's operation. In 1955, the PEMCO plant was sold
to Glidden-Durkee Corporation, which became a division of the SCM Corporation (formerly
Smith-Corona Company) in 1967. In 1980, the PEMCO Facility was sold to Mobay Chemical
Corporation. In 1992, Mobay Chemical Corporation sold the Facility to Miles Inc. In 1995,
Miles Inc. sold the facility to Bayer Corporation and in October 1997, the Facility was
transferred to the PEMCO Holding Corporation. The Facility was acquired by current owner
TRP-MCB 5601 Eastern, LLC from PEMCO Holding Corporation in 2014. The Maryland
Department of the Environment (MDE) received an application from TRP-MCB 5601 Eastern
LLC for its Voluntary Cleanup Program (VCP) on September 29, 2014. MDE accepted the
Facility into the VCP on August 12, 2015. The Facility has recently undergone
redevelopment consistent with the remedy elements described in the MDE-approved
Response Action Plan (RAP). The RAP detailed the remedy elements to address impacted
soil, soil vapor, and groundwater contamination within the Facility boundaries in
conjunction with the Facility redevelopment. Portions of the Facility have been
redeveloped into a residential apartment building, retail spaces, and office spaces.

In March 2018, TRP-MCB 5601 Eastern, LLC began demolition of existing buildings and
construction activities at the Facility. Construction and capping activities (including
placement of buildings, hardscaped areas, landscaped areas, and vapor intrusion controls in
buildings) have been substantially completed.

Section 3: Conceptual Site Model

Topography

The topographic information on the 7.5-minute USGS Topographic Quadrangle Map
(Baltimore East, MD) for the Facility vicinity indicates that the ground surface elevations on
the Facility range from approximately 120 feet above mean sea level (amsl) on the
northeastern portion of the Facility property, to approximately 60 feet amsl on the
southernmost portion of the Facility property. A topographic knoll is located on the
northeastern portion of the Facility, and the property slopes downward to the southwest,
toward southerly flowing Gorsuch Creek. To facilitate redevelopment, cuts and fills were
required to establish the mass grades, thereby altering the historic site topography.

Surficial drainage in the site vicinity is collected by Gorsuch Creek and is directed toward the
south and southwest.

Geology

The Facility is within the Coastal Plain Physiographic Province of the Lower Cretaceous Age.
The Coastal Plain is characterized by undifferentiated and interlayered sedimentary
deposits derived from eroded and transported rock formations to the north and west.

Statement of Basis

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Coastal Plain sediments were deposited in a marine and alluvial environment during periods
of fluctuating sea levels. More specifically, the Facility is shown to be underlain by the
Patapsco Formation and Artificial Fills. The southwestern portion of the Facility is mapped
within Artificial Fills. These materials are described as a heterogeneous mixture of materials
such as rock, unconsolidated sediment, slag, refuse, and dredge spoil. The central and
northern portions of the Facility are mapped within the clay facies of the Patapsco
Formation. The clay facies consist of buff, red-yellow, and brown mottled kaolinitic clays
with variable amounts of quartz sand and silt, present as pods and interbeds throughout the
clay. The northeastern portion of the Facility is underlain by the sand facies of the Patapsco
Formation. These soils consist of well-sorted medium to fine grained quartz sand with
locally abundant quartz gravel and clay clasts.

Hydrogeology

Hydrologically, the Coastal Plain is underlain by both unconfined and confined aquifers of
unconsolidated sediments, which overlie consolidated bedrock and dip toward the
southeast.

Groundwater storage and movement are functions of the primary porosity of the
sediments. The groundwater flow direction in the Facility vicinity is assumed to mirror
surficial topography. Accordingly, the groundwater flow direction is assumed to be
generally toward the south/southwest. Prior evaluations indicated the shallow water table
occurs more than 30 feet below ground surface.

Section 4: Summary of Environmental Investigations

A. Historical Investigations

B. 2006/2007 Site Characterization

PEMCO has performed investigations of environmental conditions at the Facility jointly
under EPA's Facility Lead Program and Maryland's Voluntary Cleanup Program (VCP). The

Statement of Basis

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work has been performed in accordance with the Site Characterization Work Plan dated
December 6, 2006 (ERM 2006), which was prepared by Environmental Resources
Management, Inc. (ERM) on behalf of PEMCO. EPA approved the Work Plan in January
2007. ERM has also undertaken several focused studies, approved by EPA and MDE, that
augment the Work Plan. The results of the site characterization have been documented and
submitted to EPA and MDE in a January 2011 report titled Site Characterization and Risk
Assessment Report (ERM 2011). The Facility characterization included the following:
installation of 92 soil borings, installation of 14 monitoring wells, collection of soil and
groundwater samples, installation of 32 soil gas probes, five rounds of landfill gas field
screening, and a methane extraction and recovery test.

Soil results were compared to the EPA Regional Screening Levels (RSLs). Arsenic was the
most prevalent metal detected in soil at levels above its RSL. Arsenic concentrations ranged
from non-detect to 74 mg/kg, the highest concentration found at sample location ESB-27.
The only other metals that were detected in at least one soil sample at a concentration
above its respective RSL were cobalt and iron. Cobalt was detected in five soil samples and
concentrations ranged from 26 mg/kg to 95 mg/kg. These sample locations were below or
next to the former manufacturing building at sample locations ESB-8, ESB-27, ESB-30, ESB-
31, and ESB-56 or within the landfill at sample location ESB-45. Iron was detected at
100,000 mg/kg at sample location ESB-31, which is located adjacent to the southern side of
the former main manufacturing building. Tetrachloroethene (PCE), trichloroethene (TCE),
hexachloroethane, and polycyclic aromatic hydrocarbons (PAHs) exceeded their respective
RSLs primarily in the vicinity of the landfill and south of the manufacturing complex.

The soil gas results indicated that a high concentration of VOCs, predominantly PCE and
TCE, in soil gas is present in the landfill near monitoring wells EGW-10 and EGW-10D.

Several of the soil gas sample points detected methane at concentrations ranging from 26.9
to 99.9 percent by volume.

Statement of Basis

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encountered at 49 feet bgs. The groundwater samples from EGW-10 contained PCE above
its MCL of 5 ug/L (970 |-ig/L), TCE above its MCL of 5 ug/L (270 |-ig/L), cis-l,2-dichloroethene
above its MCL of 70 ugl (570 ug/L), and carbon tetrachloride above its MCL of of 5 ug/L (21
Ug/L). Chloroform was also detected at EGW-10 at concentrations of less than 10 |ag/L but
above its tap water RSL of 0.190 |ag/L. Initial groundwater samples from EGW-10D, EGW-
9D, and EGW-11 indicated that there were no exceedances of the MCLs for any VOCs.
Carbon tetrachloride (7.7 |ag/L) and PCE (12 |ag/L) exceeded their MCLs (5 |ag/L for both) at
EGW-12. Monitoring well EGW-12 is located west of EGW-10 and concentrations were
significantly lower in EGW-12 than EGW-10.

C. 2014 Supplemental Characterization

A supplemental site characterization was conducted in 2014 by Geo-Technology Associates,
Inc. (GTA) on behalf of TRP-MCB 5601 Eastern, LLC. Activities included soil, groundwater,
soil vapor, and methane sampling and field screening. Forty-five borings (GTA-SB-1 through
GTA-SB-45) were performed for soil sampling and analysis, and 16 borings (GTA-SV-1
through GTA-SV-16) were advanced for the installation of soil vapor probes. Twenty-two
borings were performed to evaluate the depth of fill material in the landfill or for
installation of methane monitoring probes. Monitoring wells GTA-MW-1 through GTA-MW-
5 were also installed as part of this site characterization.

VOCs did not exceed the EPA RSLs in any of the soil samples analyzed. For SVOCs,
benzo(a)anthracene (RSL of 1.1 mg/kg), benzo(a)pyrene (RSL of 0.11 mg/kg),
benzo(b)fluoranthene (RSL of 1.1 mg/kg), dibenz(a,h)anthracene (RSL of 0.11 mg/kg), and
indeno(l,2,3-cd)pyrene (RSL of 1.1 mg/kg) exceeded their respective RSLs in both surface
and subsurface soil. In surface soil, concentrations ranged from non-detect to 2.6 mg/kg for
benzo(a)anthracene, non-detect to 2.2 mg/kg for benzo(a)pyrene, non-detect to 2.4 mg/kg
for benzo(b)fluoranthene, non-detect to 0.44 mg/kg for dibenz(a,h)anthracene, and non-
detect to 1.2 mg/kg for indeno(l,2,3-cd)pyrene. In subsurface soil, concentrations ranged
from non-detect to 5.8 mg/kg for benzo(a)anthracene, non-detect to 5.0 mg/kg for
benzo(a)pyrene, non-detect to 4.4 mg/kg for benzo(b)fluoranthene, non-detect to 1.1
mg/kg for dibenz(a,h)anthracene, and non-detect to 2.6 mg/kg for indeno(l,2,3-cd)pyrene.
The following metals exceeded their respective RSLs in surface and subsurface soil:

•	Antimony (RSL of 31 mg/kg): concentrations ranging from non-detect to 330 mg/kg

•	Arsenic (RSL of 0.68 mg/kg): concentrations ranging from non-detect to 27 mg/kg

•	Cadmium (RSL of 71 mg/kg): concentrations ranging from non-detect to 2,300 mg/kg

•	Cobalt (RSL of 23 mg/kg): concentrations ranging from non-detect to 190 mg/kg

•	Iron (RSL of 55,000 mg/kg): concentrations ranging from 6,700 to 110,000 mg/kg

•	Lead (RSL of 400 mg/kg) with concentrations ranging from 3.2 to 22,000 mg/kg.

Statement of Basis

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Groundwater samples were collected from newly installed monitoring wells GTA-MW-1
through GTA-MW- 5 as well as monitoring wells EGW-9D, EGW-10, and EGW-12. For
SVOCs:

•	Hexachloroethane exceeded the RSL of 0.33 |ag/L in monitoring wells GTA-MW-3,
GTA-MW-5, and EGW-10 with concentrations ranging from 11 to 670 |ag/L (GTA-
MW-5).

•	Naphthalene exceeded the RSL of 0.17 |ag/L in GTA-MW-5 (29 |-ig/L).

•	Bis(2-ethylhexyl)phthalate exceeded the MCL of 6 |ag/L in GTA-MW-4 (9.5 |-ig/L).

ForVOCs:

•	1,1,2,2-tetrachloroethane exceeded the RSL of 0.076 |ag/L in GTA-MW-5 (1.5 |ag/L)
and EGW-10 (1.4 |ag/L).

•	1,1-Dichloroethene exceeded the MCL of 7 |ag/L in GTA-MW-5 (14 |ag/L) and EGW-10
(12 M-g/L).

•	Carbon tetrachloride exceeded the MCL of 5 |ag/L in GTA-MW-2 through GTA-MW-5,
EGW-10, and EGW-12 with concentrations ranging from 5.4 to 290 |-ig/L.

•	Chloroform exceeded the MCL of 80 |ag/L in GTA-MW-2 (190 |ag/L).

•	PCE exceeded the MCL of 5 |ag/L in GTA-MW-1 through GTA-MW-5, EGW-10, and
EGW-12 with concentrations ranging from 14 to 28,000 |ag/L (GTA-MW-5).

•	TCE exceeded the MCL of 5 |ag/L in GTA-MW-2, GTA-MW-3, GTA-MW-5, and EGW-10
with concentrations ranging from 5.7 to 3,400 |ag/L (GTA-MW-5).

•	Vinyl chloride exceeded the MCL of 2 |ag/L in GTA-MW-5 (38 |ag/L) and EGW-10 (4.7
Hg/L).

•	cis-l,2-Dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5 (12,000 |ag/L)
and EGW-10 (11,000 |ag/L).

•	trans-l,2-Dichloroethene exceeded the MCL of 100 |ag/L in GTA-MW-5 (310 |ag/L)
and EGW-10 (290 |ag/L).

For dissolved metals:

•	Antimony exceeded the MCL of 6 |ag/L in GTA-MW-5 (17 |ag/L).

•	Cobalt exceeded the RSL of 6 |ag/L in GTA-MW-1 through GTA-MW-5 with
concentrations ranging from 20 to 65 |-ig/L.

•	Iron exceeded the RSL of 14,000 |ag/L in GTA-MW-4 (15,000 |ag/L) and GTA-MW-5
(18,000 M-g/L).

•	Lead exceeded the MCL of 15 |ag/L in GTA-MW-5 (1,400 |ag/L).

•	Manganese exceeded the RSL of 430 |ag/L in GTA-MW-1 (1,400 |ag/L) and GTA-MW-2
(540 M-g/L).

•	Sodium exceeded the MCL of 1,000 |ag/L in all monitoring wells with concentrations
ranging from 21,000 to 670,000 |-ig/L.

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• Total chromium exceeded the MCL of 100 |ag/L in GTA-MW-4 (320 |-ig/L).

VOCs (carbon tetrachloride, chloroform, PCE, 1,1,2-trichloroethane, TCE, and vinyl chloride)
were detected in soil vapor beneath the Facility above their MDE Tier 1 Values. Carbon
tetrachloride (MDE Tier 1 of 94 |-ig/m3) was found at concentrations ranging from non-
detect to 7,600 |-ig/m3. Chloroform (MDE Tier 1 of 24 |-ig/m3) was found at concentrations
ranging from non-detect to 2,300 |-ig/m3. PCE (MDE Tier 1 of 840 |-ig/m3) was found at
concentrations ranging from non-detect to 380,000 |-ig/m3. TCE (MDE Tier 1 of 42 |-ig/m3)
was found at concentrations ranging from non-detect to 23,000 |-ig/m3. 1,1,2-
Trichloroethane (MDE Tier 1 of 4.2 |-ig/m3) was found at concentrations ranging from non-
detect to 5.3 |-ig/m3. Methane was detected in the central portion of Crystal Hill as high as
61.7% by volume.

D. Supplemental Investigations

As part of the RAP, several supplemental site investigations were performed at the Facility,
as summarized below.

In July 2017, GTA performed a Supplemental Site Investigation (SSI) of the suspect
polychlorinated biphenyl (PCB) underground storage tank (UST) area on behalf of TRP-MCB
5601 Eastern, LLC. This SSI was performed on the northeastern portion of the Facility, in the
vicinity of the former control laboratory building. A geophysical evaluation in the asphalt
and concrete-paved areas located in the vicinity of the control laboratory building did not
identify anomalies that were considered consistent with an UST. Ten soil borings were
installed and sample results did not identify PCBs.

The SSI also further evaluated lead and cadmium soil impacts previously identified at three
locations (GTA-SB-11, GTA-SB-26, and GTA-SB-41) on the central and southeastern portions
of the Facility. Lead was detected in each of the soil samples obtained but was below the
RSL. Cadmium was not detected above the laboratory reporting limit.

In March 2018, TRP-MCB 5601 Eastern, LLC installed six additional soil vapor points to
further evaluate impacts surrounding soil vapor sampling location GTA-SV-5. PCE and TCE
were detected above the screening levels, with PCE concentrations ranging from 3.4 to
3,600 |ag/m3and TCE concentrations ranging from non-detect to 150 |-ig/m3. Impacts are
primarily located beneath the location of the former Warehouse and Main Manufacturing
Building.

TRP-MCB 5601 Eastern, LLC performed additional groundwater gauging, sampling, and
analysis in March 2018, prior to building demolition and groundwater monitoring well
abandonment which had been approved by the EPA and MDE. Five monitoring wells (GTA-
MW-1 through GTA-MW-5) installed in 2014 and three wells, previously installed between
2006 and 2009 (EGW-9D, EGW-10, and EGW-12), were assessed and determined to be
intact. The eight wells, except for EGW-9D, which was damaged and not sampled in 2018,
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contained exceedances of the MCLs and/or Tapwater RSLs for VOCs, SVOCs, and TAL
metals. 1,1-Dichloroethane was detected above the MCL of 7 |ag/L in GTA-MW-5 (10 |ag/L)
and EGW-10 (13 |ag/L); carbon tetrachloride exceeded the MCL of 5 |ag/L in each well except
GTA-MW-1 with concentrations ranging from 5.4 to 410 |ag/L; chloroform exceeded the
MCL of 80 |ag/L in GTA-MW-2 (380); PCE exceeded the MCL in GTA-MW-2 (720 jig/L), GTA-
MW-3 (12 jig/L), GTA-MW-5 (2,800 jig/L), EGW-10 (5,100 |ag/L), and EGW-12 (7.8 |ag/L); TCE
exceeded the MCL in GTA-MW-2 (170 jig/L), GTA-MW-5 (1,500 |ag/L), and EGW-10 (3,200
l-ig/L); cis-l,2-dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5 (4,700 |ag/L) and
EGW-10 (13,000 |-ig/L); and trans-l,2-dichloroethene exceeded the MCL of 100 |ag/L in GTA-
MW-5 (180 |-ig/L) and EGW-10 (310 |ag/L). Dissolved cobalt, sodium, and lead were also
detected above the MCLs and/or Tapwater RSLs. The monitoring wells installed during the
Phase I investigation in 2006 were either abandoned prior to 2014 or were installed too
shallow and did not yield any groundwater.

In November 2019, TRP-MCB 5601 Eastern, LLC conducted an additional methane
evaluation. Twenty-one methane probes were installed within and surrounding the landfill.
Four rounds of methane screening were conducted between November 15, 2019 and
December 18, 2019, and on July 24, 2020. The areas where methane was detected
corresponded to areas within the landfill, with the areas of highest methane concentrations
(GTA-CMM1 and GT-CMM2) corresponding to an area of high methane concentrations
observed during prior evaluations.

E.	Natural Attenuation

Natural attenuation entails a variety of physical, chemical and/or biological processes that
reduce the mass, toxicity, mobility, volume, or concentration of constituents of concern.
These processes are classified as degradation (biological or chemical), sorption (chemical)
and dispersion, diffusion, dilution, and volatilization (physical).

Although temporal ground water sampling data is limited to multiple sampling events in fall
2009, winter 2010, February 2013, January 2015, and March 2013, it is reasonable to
interpret the existing ground water data as indicative of attenuating conditions. The
highest detections are of PCE,TCE, and cis-l,2-dichloroethene at the source area in wells
GTA-MW-5 and EGW-10 . PCE, TCE, and cis-l,2-dichloroethene concentrations appear to be
decreasing in monitoring well GTA-MW-5. In addition, detections of cis-l,2-dichloroethene
at GTA-MW-1 through GTA-MW-5 and EGW-10 and detections of vinyl chloride at GTA-MW-
5 and EGW-10, along with PCE and TCE, is indicative of natural biodegradation of PCE. cis-
1,2-Dichloroethene and vinyl chloride are produced through the natural reductive
dechlorination of PCE and TCE.

F.	Interim Measures

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Soil sampling conducted by TRP-MCB 5601 Eastern, LLC in 2018 identified PCB impacts in
two areas: (1) an enclosed transformer room within the northeastern portion of the former
warehouse building; and (2) a portion of a concrete floor slab, adjacent to a former
transformer pad, in the west-central portion of the color mixing building. The transformers
were removed sometime in the past, but it is not known when. In November 2018, PCB-
contaminated soil and concrete were delineated in these areas and placed in roll-off
dumpsters for off-site disposal. Approximately 161,000 kilograms or 178 tons of material
were disposed of at an off-site disposal facility.

During redevelopment activities throughout 2018 and 2019, petroleum-impacts were
discovered in certain areas of the Facility. In December 2018 and January 2019, two areas of
petroleum-impacted soil were discovered in sewer and storm drain utility runs located on
the southeastern portion of the Facility. The petroleum-impacted soil was observed
approximately 1-foot bgs and consisted of gray clays and silts that exhibited a petroleum
odor. Elevated Photoionization Detector (PID) readings were not observed. Stained soil and
petroleum odors were not observed below 5 feet bgs, where native clays were
encountered. The approximate area of excavated petroleum-impacted soil that was
removed was about 50 feet long, 10 feet wide, and 5 feet deep. The petroleum-impacted
soil was staged on and covered with plastic adjacent to the excavation prior to future off-
site disposal. No liquids were encountered in the excavation.

In March 2018, an area of petroleum-impacted soil was discovered in a water line utility run
located on the southeastern portion of the Facility, contiguous to the impacts identified in
December 2018 and in January 2019. The petroleum-impacted soil was observed
approximately 1-foot bgs. The soil observations and PID readings were generally consistent
to the area of adjacent impacts. Stained soil and petroleum odors were not observed below
3 feet bgs, where native clays were encountered. The area of excavated petroleum-
impacted soil that was removed measured approximately 40 feet long, 4 feet wide, and 3
feet deep.

In May and June 2019, petroleum-impacted materials were encountered during footing
excavations. An approximately 75-foot section of petroleum-impacted soil was discovered
in May 2019. In June 2019, two approximately 25-foot sections of petroleum-impacted soil
were discovered north and south of the original 75-foot section. This material was found
approximately 3 feet bgs and consisted of an approximately VA-foot layer of stone, brick,
and concrete mixed with soil (petroleum-impacted material). Clays were observed above
and below this material, and the clays did not display indications of staining or unusual
odors. The petroleum-impacted material exhibited petroleum odors, and PID readings were
between 30-60 ppm. No liquids were observed in the excavation. Petroleum-impacted soils
were not observed west of the excavation during prior utility installation activities, nor were
they observed further east during the installation of interior column footings.

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In 2018, TRP-MCB 5601 Eastern, LLC identified and removed three 8,000-gallon diesel USTs
(identified as UST Nos. 2-4), two 500-gallon heating oil USTs (identified as UST Nos. 5 and 6),
and a 550-gallon heating oil UST (identified as UST No. 8). It should be noted that UST Nos.
1 and 7 were previously removed from the Facility. A total of 343.7 tons of petroleum
impacted soil was removed during all excavation activities described above.

Footnotes for the tables are provided in Table 1. Soil borings locations are shown on
Figures 2A and 2B and results are provided in Tables 2 through 4. Monitoring well locations
are shown on Figures 3A and 3B and results are provided in Tables 5 through 7. Soil vapor
sample locations are shown on Figures 4A and 4B and results are provided in Table 8.

Section 5: Human Health Risk Assessment

• Presuming future redevelopment of the Facility property, exposure of future
building occupants to soil gas via vapor intrusion could result in unacceptable risk to
human health.

• Exposure to impacted soils within the approximate extent of VOC impacts (identified
on Figure 2A) could result in an elevated non-carcinogenic hazard and carcinogenic
risk to the construction/utility worker if unprotected exposure were to occur.

• Exposure to soil vapors in a trench within the approximate extent of VOC impacts
(identified on Figure 2A) could result in an elevated carcinogenic risk to the
construction/utility worker.

• Exposure to deep on-site groundwater for non-potable purposes could result in an
elevated carcinogenic and noncarcinogenic risk for industrial workers.

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Migration of Contaminated Groundwater Under Control Environmental Indicator for the
Facility, analytical results from EGW-12 indicate low levels of VOCs are present in
groundwater. The concentrations of carbon tetrachloride (6.8 |ag/L) and PCE (7.8 |ag/L)
detected in EGW-12 are significantly lower than at the center of the property (at EGW-10)
and are likely attributable to mixing of waters beneath the landfill where flow from the west
and east converge at a former stream trace. The risk to off-site receptors west of EGW-12
due to vapor intrusion has been assessed based on the prior ESG-30 and ESG-31 soil gas
results and found to be negligible. ESG-30 and ESG-31 are located near EGW-31 and
benzene in ESG-31 (696J |-ig/m3) was the only constituent that exceeded the MDE Tier 1
value of 72 |-ig/m3. VOCs were also non-detect at downgradient monitoring well EGW-9D,
except for PCE at 1.1 ug/L, which is below the MCL of 5 ug/L. These data, along with the soil
gas results collected as part of the site characterization indicate that VOCs are not migrating
towards the property boundary at levels of concern.

Section 6: Corrective Action Objectives

The EPA's Corrective Action Objectives (CAOs) are as follows:

1.	Soil

The EPA has determined that hazardous constituents currently remain in Facility
soils above acceptable risk levels protective of human health and the environment
for residential use. Therefore, the EPA's proposed Corrective Action Objective for
Facility soils is to control exposure to the hazardous constituents remaining in
surface soils by requiring compliance with and maintenance of engineering controls
and land use restrictions.

2.	Groundwater

The EPA expects final remedies to return usable groundwater to its maximum
beneficial use, where practicable, within a timeframe that is reasonable. For
projects where aquifers are either currently used for water supply or have the
potential to be used for water supply, EPA will use the National Primary Drinking
Water Standard MCLs promulgated pursuant to Section 42 U.S.C. §§ 300f et seq. of
the Safe Drinking Water Act and codified at 40 C.F.R. Part 141. EPA's Corrective
Action Objectives for Facility groundwater are 1) to restore the groundwater to
drinking water standards, otherwise known as MCLs, or to the relevant RSL for tap
water for contaminants that do not have an MCL and, 2) until such time as drinking
water standards are restored, to control exposure to the hazardous constituents
remaining in the groundwater by requiring the continued implementation of the

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groundwater monitoring program and compliance with and maintenance of
groundwater use restrictions.

3. Soil Vapor

The EPA's CAO for soil vapor at the Facility is to control human exposure to
contaminated subsurface vapor in buildings/structures so that indoor air quality
within any such buildings/structures is protective of human health for current and
anticipated future uses.

Section 7: Proposed Remedy

The EPA's proposed remedy for all environmental media is as follows:

1.	Soil

The EPA's proposed remedy for Facility soil is to install and maintain a cover system
on the entire Facility (hardscaped or landscaped cap with marker fabric above the
contaminated soil) that controls, minimizes, or eliminates post remedial action
migration of hazardous waste, hazardous constituents, leachate, contaminated run-
off, or hazardous waste decomposition products to the ground or surface waters or
to the atmosphere, to the extent necessary to protect human health and the
environment. The remaining area of the Facility to be capped (Figure 5) includes a
small portion undergoing redevelopment (the rest of the Facility has already been
capped). The cap shall be designed and constructed to prevent infiltration to
mitigate potential cross-media migration (soil to groundwater) of COCs. The cap
shall be functionally equivalent to the performance standards documented in 40
C.F.R. Section 265.310.

A Containment Remedy Operations and Maintenance (O&M) Plan and Health and
Safety Plan shall be submitted for EPA and MDE review and approval and, at a
minimum will include the following: the procedures to maintain the cap over the
contaminated soil; a schedule for inspections to be performed as part of cap
maintenance, no less frequent than once a year; physical maintenance requirements
of the capped areas to prevent degradation of the cap and unacceptable exposure
to the underlying soil.

2.	Groundwater

The EPA's proposed remedy for Facility groundwater consists of monitored natural
attenuation until MCLs or, if no MCLs exist, the RSLs for tap water are met.

Data show the plume is stable and levels of TCE and PCE are naturally attenuating.
The highest concentrations are of PCE, TCE, and cis-l,2-dichloroethene at the source
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area in wells GTA-MW-5 and EGW-10 and concentrations appear to be stable or
decreasing .Additionally, detections of cis-l,2-dichloroethene at GTA-MW-1 through
GTA-MW-5 and EGW-10 and detections of vinyl chloride at GTA-MW-5 and EGW-10,
along with PCE and TCE, is indicative of natural biodegradation of PCE. Cis-1,2-
Dichloroethene and vinyl chloride are produced through the natural reductive
dechlorination of PCE and TCE.

Monitoring wells shall be installed pursuant to an EPA-approved Work Plan and
long-term groundwater monitoring shall be required. Additionally, groundwater
restrictions, which prohibit onsite use, shall remain in place to prevent exposure to
contaminants while levels remain above MCLs or RSLs, as applicable. The source
removal in the form of soil excavations discussed in Section 4 and the permanent
cover system at the Facility that will reduce stormwater infiltration will aid in the
further attenuation of contamination.

3.	Soil Vapor

a.	A vapor intrusion control system, the design of which shall be approved in
advance in writing by the EPA and MDE, shall be installed in each new
structure on the Facility, unless it is demonstrated to EPA and MDE that
vapor intrusion does not pose a threat to human health and EPA and MDE
provide prior written approval that no vapor intrusion control system is
needed.

b.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

c.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

d.	Atmospheric pressure differentials and other factors such as soil
permeability, moisture content, etc., may cause accumulation of methane
beneath hardscaped paved areas, and shall be addressed by installation of
vapor vents located at light pole locations within the parking lots.

4.	Institutional Controls

The EPA's proposed remedy also includes the following land and groundwater use
restrictions and notifications to protect human health and the integrity of the
remedy:

a. Groundwater at the Facility shall not be used for any purpose other than the
operation, maintenance, and monitoring activities currently being conducted
at the Facility and activities required by the EPA and MDE, unless it is

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demonstrated to the EPA and MDE that such use will not pose a threat to
human health or the environment or adversely affect or interfere with the
final remedy, and the current Facility owner obtains prior written approval
from the EPA and MDE for such use.

b.	No new wells shall be installed on the Facility unless it is demonstrated to the
EPA and MDE that such wells are necessary to implement the final remedy
for the Facility, and the current owner obtains prior written approval from
the EPA and MDE to install such wells.

c.	A vapor intrusion control system, the design of which shall be approved in
advance in writing by the EPA and MDE, shall be installed in each new
structure on the Facility, unless it is demonstrated to EPA and MDE that
vapor intrusion does not pose a threat to human health and EPA and MDE
provide prior written approval that no vapor intrusion control system is
needed.

d.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

e.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

f.	Compliance with the EPA and MDE-approved O&M Plan. The O&M Plan will
require the current Facility owner to maintain the integrity of the vapor
intrusion control systems and all caps and covers on the Facility by
conducting regular periodic inspections (no less frequently than once per
year), making timely repairs if needed, and maintaining a record of such
inspection and maintenance. The O&M Plan will also establish the
documentation, reporting, and notification methods that will be used to
implement, monitor compliance, and ensure the O&M Plan remains in place
and effective.

g.	All earthmoving activities on the Facility, including excavation, grading,
and/or utility construction, shall be conducted in compliance with an EPA
and MDE-approved O&M Plan to ensure that the activity will not pose a
threat to human health and the environment or adversely affect or interfere
with the covered areas.

h.	On an annual basis and whenever requested by the EPA or MDE, the current
Facility owner shall submit to MDE and the EPA a written certification stating
whether the owner is maintaining and complying with all groundwater and
land use restrictions.

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i. The Facility shall not be used in a way that will adversely affect or interfere
with the integrity and protectiveness of the final remedy.

The land and groundwater use restrictions necessary to prevent human exposure to
contaminants at the Facility will be implemented through enforceable Institutional Controls
(ICs) such as an order and/or an Environmental Covenant pursuant to the Maryland Uniform
Environmental Covenants Act, §§ 1-80 I through 1-815 of the Environment Article,
Annotated Code of Maryland to be recorded with the deed for the Facility property. If the
EPA determines that additional monitoring activities, institutional controls, or other
corrective actions are necessary to protect human health or the environment, the EPA has
the authority to require and enforce such additional corrective actions through an
enforceable mechanism which may include an order or Environmental Covenant, provided
any necessary public participation requirements are met. If any individual with an interest in
the Facility property believes that information shows that any use restrictions proposed and
later selected by the EPA are no longer necessary to protect public health and the
environment, the individual may submit such information to the EPA for consideration. The
EPA can change any such restriction if it determines it is no longer necessary, after any
required public comment period.

Section 8: Evaluation of Proposed Remedy

This section provides a description of the criteria the EPA used to evaluate the proposed
remedy consistent with EPA guidance. The criteria are applied in two phases. In the first
phase, the EPA evaluates three decision threshold criteria as general goals. In the second
phase, for those remedies which meet the threshold criteria, the EPA then evaluates seven
balancing criteria.

Threshold Criteria

Evaluation

1) Protect human
health and the
environment

The EPA's proposed remedy for the Facility protects human
health and the environment by eliminating, reducing, or
controlling unacceptable risk through the implementation and
maintenance of environment use restrictions and engineering
controls for contaminated soil and groundwater above
acceptable residential use levels.

Soil

A cap installed throughout the entire Facility will protect
human health and environmental exposure by preventing
direct contact.

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Groundwater

Human health and environmental exposure for groundwater
will be protected through restrictions on potable groundwater
use. The proposed use restrictions at the Facility will eliminate
future unacceptable exposures to groundwater until MCLs or
the RSLs for tap water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed. A vapor intrusion control system, the design of which
shall be approved in advance in writing by the EPA and MDE,
shall be installed in each new structure on the Facility, unless it
is demonstrated to EPA and MDE that vapor intrusion does not
pose a threat to human health and EPA and MDE provide prior
written approval that no vapor intrusion control system is
needed.

2) Achieve media
cleanup objectives

The EPA's proposed remedy achieves media cleanup
objectives based on assumptions regarding current and
reasonably anticipated land and water resource use(s). The
proposed remedy in this SB is based on an anticipated
residential land use.

Soil

The permanent cover system at the Facility will prevent direct
contact to impacted soils and will reduce stormwater
infiltration to impacted groundwater and prevent receptor
direct contact exposure.

Groundwater

Data show the plume is stable and concentrations of
contaminants of concern are naturally attenuating. The
proposed use restrictions at the Facility will eliminate future
unacceptable exposures to and groundwater until MCLs or the
RSLs for tap water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as

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needed. The vapor intrusion control systems include alarms to
indicate if indoor air concentrations exceed the cleanup
criteria.

3) Remediating the
Source of Releases

In all proposed remedies, EPA seeks to eliminate or further
reduce releases of hazardous wastes and hazardous
constituents that may pose a threat to human health and the
environment, and this proposed remedy meets this objective.

The sources of petroleum and PCB releases have been
removed from Facility soils, thereby eliminating, to the extent
practicable, further releases of hazardous constituents from
on-site soils as well as groundwater.

Soil

The permanent cover system at the Facility will prevent direct
contact to impacted soils and will reduce stormwater
infiltration to impacted groundwater and prevent receptor
direct contact exposure.

Groundwater

Data show the plume is stable and concentrations of
contaminants of concern are naturally attenuating. The
proposed use restrictions at the Facility will eliminate future
unacceptable exposures to groundwater until MCLs or the
RSLs for tap water, if no MCLs exist, are met. Groundwater
monitoring of the onsite wells will continue long-term.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed. A vapor intrusion control system, the design of which
shall be approved in advance in writing by the EPA and MDE,
shall be installed in each new structure on the Facility, unless it
is demonstrated to EPA and MDE that vapor intrusion does not
pose a threat to human health and EPA and MDE provide prior
written approval that no vapor intrusion control system is
needed.

Balancing Criteria

Evaluation

1) Long-term

Soil

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effectiveness

The long-term effectiveness of the permanent cover system
will be maintained by the implementation of institutional
controls.

Groundwater

The long-term effectiveness of the remedy will be maintained
by the implementation of land and groundwater use
restrictions. The groundwater use restrictions will be
maintained until MCLs or the RSLs for tap water, if no MCLs
exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed.

2) Reduction of
toxicity, mobility, or
volume of the
Hazardous
Constituents

Soil

The permanent cover system at the Facility will reduce the
mobility of soil contaminants. The sources of petroleum and
PCB releases have been removed from the soil at the Facility,
thereby eliminating further releases of hazardous constituents
from on-site soils.

Groundwater

Groundwater contaminant levels are anticipated to achieve
MCLs through natural attenuation; groundwater use will be
restricted to prevent exposure until MCLs or the RSLs for tap
water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility are protected by a vapor intrusion
control system.

3) Short-term
effectiveness

Soil

The permanent cover system at the Facility provides
immediate risk reduction. Additionally, the EPA's proposed
remedy takes into consideration future activities, such as
construction or excavation that would pose short-term risks to
workers, residents, and the environment, by requiring
notification of these activities to the EPA and MDE.

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Groundwater

The use restrictions would become effective immediately upon
implementation through an enforceable mechanism such as an
EC or order.

Soil Vapor

The vapor intrusion control systems provide immediate risk
reduction.

4) Implementability

The proposed remedy is readily implementable. The
implementation of use restrictions will be through a
mechanism that will inform future owners and occupants of
these restrictions, such as an environmental covenant, permit,
or order.

5) Cost

The costs associated with this proposed remedy are associated
with the development and recording of the Environmental
Covenant, permit, or order; cap and vapor intrusion control
system maintenance and inspections; reporting; installation of
new monitoring wells; and continued sampling and
maintenance of the monitoring wells.

6) Community
Acceptance

The EPA will evaluate community acceptance based on
comments received during the public comment period and will
address any comments in the Final Decision.

7) State/Support
Agency Acceptance

State involvement has been solicited throughout the RCRA
corrective action process and MDE concurred with the
proposed remedy.

Overall, based on the evaluation criteria, the EPA has determined the proposed remedy
meets the threshold criteria and provides the best balance of tradeoffs with respect to the
evaluation criteria.

Section 9: Financial Assurance

PEMCO will be required to demonstrate and maintain financial assurance for completion of
the remedy pursuant to the standards contained in Federal regulations 40 C.F.R. § 264.145
and 40 CFR § 264.143.

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 20

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Section 10: Public Participation

The public may participate in the remedy selection process by reviewing this SB and
documents contained in the AR for the Facility and providing comments. The AR contains all
information considered by EPA when proposing this remedy. The AR documents are
available for public review at the location below:

The public comment period will last thirty (30) calendar days from the date that the notice
is published in a local newspaper. You may submit comments by mail or e-mail to Christine
Kimak. EPA will hold a public meeting to discuss this proposed remedy upon request. If you
would like to request a public meeting, please contact Christine Kimak.

The EPA will respond to all relevant comments received during the comment period. If the
EPA determines that new information warrants a modification to the proposed remedy, the
EPA will modify the proposed remedy or select an alternative based on the new information
and/or public comments. In the Final Decision, the EPA will announce the selection of its
final remedy, respond to all relevant comments received, and explain the rationale for any
changes to the proposed remedy. All persons who comment on this proposed remedy will
receive a copy of the Final Decision. Others may obtain a copy by contacting Christine Kimak
at the address listed above. The Final Decision will also be made publicly available on the
EPA's website for the Facility.

Section 11: Signature

U.S. EPA Region 3

4 Penn Center
1600 JFK Boulevard
Philadelphia, PA 19103
Contact: Christine Kimak (3LD11)

Phone: 215-814-2798
Email: kimak.christine@epa.gov

Driscoll, Stacie

Date ]

Digitally signed by Bristol,

2024.05-24 14:1133 -04 tiff

Date:

Stacie Driscoll, Acting Director

Land, Chemicals, and Redevelopment Division

US EPA, Region 3

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 21

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Section 12: Index to Administrative Record

ERM. 2006. Site Characterization Work Plan. December.

ERM. 2011. Site Characterization and Risk Assessment Report.

ERM. 2013 Final Site Characterization and Risk Assessment Report for 5601 Eastern
Avenue, Baltimore, Maryland. May.

GTA. 2014. Report of Phase I Environmental Site Assessment: Former PEMCO Facility.
April.

GTA. 2016. Response Action Plan. April.

GTA. 2018a. Site Update Response. April.

GTA. 2018b. Soil Vapor Screening and Assessment. April.

GTA. 2018c. Groundwater Evaluation Summary. May.

GTA. 2020. Response Action Plan Completion Report: Yard 56- Road and Retails Parcels.
November.

USEPA. 2020. Statement of Basis: PEMCO Inc. Lots 27C and 28. May.

Section 13: Attachments

Table 1 - Characterization Sampling Key

Table 2A - VOC Soil Characterization Summary, 2014-2017 Sampling
Table 2B - VOC Soil Characterization Summary, Pre-2014 Sampling
Table 3A - SVOC and PCB Soil Characterization Summary, 2014 Sampling
Table 3B - SVOC and PCB Soil Characterization Summary, Pre-2014 Sampling
Table 4 - Metals Soil Characterization Summary, 2014-2017 Sampling
Table 5 - SVOC Groundwater Characterization Summary
Table 6 - VOC Groundwater Characterization Summary
Table 7 - Metals Groundwater Characterization Summary
Table 8 - Soil Vapor Analysis Summary

Figure 1-Site Location Map
Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 22

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Figure 2A-Soil Sample Location Plan
Figure 2B — Soil Sample Location Plan
Figure 3A - Groundwater Sample Location Plan
Figure 3B - Groundwater Sample Location Plan
Figure 4A - Soil Vapor Sample Location Plan
Figure 4B - Soil Vapor Sample Location Plan
Figure 5 - Capping Diagram

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 23

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Tables

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Table 1

Characterization Sampling Key

Yard 56

Baltimore, Maryland
GTA Project No. 140080

Soil Characterization Summary Tables

Groundwater Characterization Summary Tables

(Tables 2 through 4)

(Tables 5 through 7)

Results in milligrams per kilogram (mg/kg) or parts per million (ppm) or micrograms per kilogram (|jg/kg), similar to parts per billion (ppb)

Results in micrograms per liter (|jg/L), similar to parts per billion (ppb)

USEPA= United States Environmental Protection Agency

USEPA = United States Environmental Protection Agency

RSL = USEPA November 2017 Regional Screening Level

RSL = USEPA November 2017 Regional Screening Level

NE = USEPA Region 3 Standard Not Established

MCL = USEPA Region 3 groundwater Maximum Contaminant Level

Blank Cell = Not analyzed

*= MCL not established therefore USEPA Region 3 Tapwater RSLs utilized as comparison value

Shaded values represent exceedance of the USEPA Region 3 Residential Soil RSLs

** = Laboratory Method Detection Limit was used in place of laboratory reporting limit

SVOCs = Semi-Volatile Organic Compounds

NE = USEPA Region 3 standard not established

PCBs = Polychlorinated Biphenyls

Blank Cell = Not analyzed

VOCs = Volatile Organic Compounds

Shaded values represent exceedance of the USEPA Region 3 MCL or RSLs as noted

B = Analyte not detected substantially above concentration found in the laboratory or field blank

SVOCs = Semi-Volatile Organic Compounds

J = The target analyte was positively identified below the reporting limit but greater than the Method Detection Limit

VOCs = Volatile Organic Compounds

K = Analyte present, the reported value is biased high actual value is expected lower

Only exceedances of dissolved Target Analyte List Metals are indicated

L = Analyte present, the reported value is biased low, actual value is expected higher

J = The target analyte was positively identified below the reporting limit but greater than the Method Detection Limit

DUP = Duplicate sample

U = analyte not detected.

Detected compounds shown in black

E = The data exceeds the upper calibration limit; therefore, the concentration is reported as estimated.



L = Analyte present, the reported value is biased low, actual value is expected higher.



DUP = Duplicate sample



Detected compounds shown in black

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Table 2A	Yard56

VOC Soil Characterization Summary	Baltimore City Maryland

^ ..	GTA Project No. 140080

2014-2017 Sampling	„ , „

Page 1 of 3

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-1

GTA-SB-2

GTA-SB-3

GTA-SB-4

GTA-SB-5

GTA-SB-6

GTA-SB-7

GTA-SB-8

GTA-SB-9

GTA-SB-10

Depth (feet)

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

Sample Date

11/17/2014

11/17/2014

TCL VOCs

(ug/kg)



1,1,1-Trichloroethane

8,100,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,1,2,2-Tetrachloroethane

2,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

l,l,2-Trichloro-l,2,2-Trifluoroethane

6,700,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,1,2-Trichloroethane

1,100

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,1-Dichloroethane

3,600

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,1-Dichloroethene

230,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,2,3-Trichlorobenzene

63,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,2,4-Trichlorobenzene

24,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

l,2-Dibromo-3-Chloropropane

5.3

<36

<39

<29

<32

<43

<35

<38

<40

<36

<42

1,2-Dibromoethane (EDB)

36

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,2-Dichlorobenzene

1,800,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,2-Dichloroethane

46

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,2-Dichloropropane

2,500

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,3-Dichlorobenzene

NE

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

1,4-Dichlorobenzene

2,600

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

2-Butanone (MEK)

27,000,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

2-Hexanone

200,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

4-Methyl-2-Pentanone

33,000,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

Acetone

61,000,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

Benzene

1,200

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Bromochloromethane

150,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Bromodichloromethane

290

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Bromoform

19,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Bromomethane

6,800

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Carbon Disulfide

770,000

<9.0

<9.8

<7.3

<8.0

<11

<8.7

<9.5

<10

<9.1

<10

Carbon Tetrachloride

650

6.2

18

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Chlorobenzene

280,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Chloroethane

14,000,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Chloroform

320

12

8.0

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Chloromethane

110,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Cyclohexane

6,500,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

Dibromochloromethane

8,300

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Dichlorodifluoromethane

87,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Ethylbenzene

5,800

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Isopropylbenzene

1,900,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Methyl Acetate

78,000,000

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

Methyl-t-butyl ether

47,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Methylcyclohexane

NE

<18

<20

<15

<16

<21

<17

<19

<20

<18

<21

Methylene Chloride

57,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Naphthalene

3,800

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Styrene

6,000,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Tetrachloroethene

24,000

<4.5

12

280

<4.0

<5.3

9.8

<4.8

<5.0

<4.5

<5.2

Toluene

4,900,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Trichloroethene

940

<4.5

<4.9

15

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Trichlorofluoromethane

23,000,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

Vinyl Chloride

59

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

cis-l,2-Dichloroethene

160,000

<4.5

<4.9

4.7

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

cis-l,3-Dichloropropene

NE

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

m,p-Xylenes

1,010,000

<9.0

<9.8

<7.3

<8.0

<11

<8.7

<9.5

<10

<9.1

<10

o-Xylene

650,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

trans-l,2-Dichloroethene

1,600,000

<4.5

<4.9

<3.6

<4.0

<5.3

<4.3

<4.8

<5.0

<4.5

<5.2

trans-l,3-Dichloropropene

NE

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Table 2A	Yard56

VOC Soil Characterization Summary	Baltimore City Maryland

^ ..	GTA Project No. 140080

2014-2017 Sampling	D . „

Page 2 of 3

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-11

GTA-SB-12

GTA-SB-13

GTA-SB-14

GTA-SB-15

GTA-SB-16

GTA-SB-17

GTA-SB-18

GTA-SB-23

GTA-SB-24

Depth (feet)

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

4-5

Sample Date

11/17/2014

11/17/2014

11/18/2014

TCL VOCs

(ug/kg)



1,1,1-Trichloroethane

8,100,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,1,2,2-Tetrachloroethane

2,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

l,l,2-Trichloro-l,2,2-Trifluoroethane

6,700,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,1,2-Trichloroethane

1,100

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,1-Dichloroethane

3,600

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,1-Dichloroethene

230,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,2,3-Trichlorobenzene

63,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,2,4-Trichlorobenzene

24,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

l,2-Dibromo-3-Chloropropane

5.3

<39

<39

<41

<34

<40

<39

<44

<33

<38

<36

1,2-Dibromoethane (EDB)

36

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,2-Dichlorobenzene

1,800,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,2-Dichloroethane

46

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,2-Dichloropropane

2,500

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,3-Dichlorobenzene

NE

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

1,4-Dichlorobenzene

2,600

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

2-Butanone (MEK)

27,000,000

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

2-Hexanone

200,000

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

4-Methyl-2-Pentanone

33,000,000

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

Acetone

61,000,000

30

<19

<21

<17

<20

<19

<22

<16

<19

<18

Benzene

1,200

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Bromochloromethane

150,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Bromodichloromethane

290

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Bromoform

19,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Bromomethane

6,800

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Carbon Disulfide

770,000

<9.8

<9.6

<10

<8.6

<10

<9.6

<11

<8.2

<9.5

<9.1

Carbon Tetrachloride

650

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Chlorobenzene

280,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Chloroethane

14,000,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Chloroform

320

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Chloromethane

110,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Cyclohexane

6,500,000

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

Dibromochloromethane

8,300

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Dichlorodifluoromethane

87,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Ethylbenzene

5,800

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Isopropylbenzene

1,900,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Methyl Acetate

78,000,000

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

Methyl-t-butyl ether

47,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Methylcyclohexane

NE

<20

<19

<21

<17

<20

<19

<22

<16

<19

<18

Methylene Chloride

57,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Naphthalene

3,800

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Styrene

6,000,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Tetrachloroethene

24,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Toluene

4,900,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Trichloroethene

940

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Trichlorofluoromethane

23,000,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

Vinyl Chloride

59

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

cis-l,2-Dichloroethene

160,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

cis-l,3-Dichloropropene

NE

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

m,p-Xylenes

1,010,000

<9.8

<9.6

<10

<8.6

<10

<9.6

<11

<8.2

<9.5

<9.1

o-Xylene

650,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

trans-l,2-Dichloroethene

1,600,000

<4.9

<4.8

<5.1

<4.3

<5.0

<4.8

<5.5

<4.1

<4.7

<4.6

trans-l,3-Dichloropropene

NE

-------
Table 2A	Yard56

VOC Soil Characterization Summary	Baltimore City Maryland

^ ..	GTA Project No. 140080

2014-2017 Sampl.ng	page3of3

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-25

GTA-SB-26

GTA-SB-27

GTA-SB-28

GTA-SB-29

GTA-PCB-10

GTA-PCB-7

GTA-PCB-6

GTA-PCB-4

GTA-PCB-2

Depth (feet)

4-5

4-5

4-5

4-5

4-5

10

7

6

4

2

Sample Date

11/18/2014

7/10/2017

TCL VOCs

(ug/kg)



1,1,1-Trichloroethane

8,100,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,1,2,2-Tetrachloroethane

2,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

l,l,2-Trichloro-l,2,2-Trifluoroethane

6,700,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,1,2-Trichloroethane

1,100

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,1-Dichloroethane

3,600

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,1-Dichloroethene

230,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,2,3-Trichlorobenzene

63,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,2,4-Trichlorobenzene

24,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

l,2-Dibromo-3-Chloropropane

5.3

<36

<48

<37

<37

<46

<35

<36

<34

<33

<35

1,2-Dibromoethane (EDB)

36

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,2-Dichlorobenzene

1,800,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,2-Dichloroethane

46

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,2-Dichloropropane

2,500

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,3-Dichlorobenzene

NE

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

1,4-Dichlorobenzene

2,600

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

2-Butanone (MEK)

27,000,000

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

2-Hexanone

200,000

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

4-Methyl-2-Pentanone

33,000,000

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

Acetone

61,000,000

23

40

<19

65

<23

<17

<18

<17

<17

<17

Benzene

1,200

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Bromochloromethane

150,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Bromodichloromethane

290

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Bromoform

19,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Bromomethane

6,800

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Carbon Disulfide

770,000

<9.0

<12

<9.3

<9.2

<12

<8.6

<9.0

<8.6

<8.4

<8.6

Carbon Tetrachloride

650

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Chlorobenzene

280,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Chloroethane

14,000,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Chloroform

320

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Chloromethane

110,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Cyclohexane

6,500,000

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

Dibromochloromethane

8,300

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Dichlorodifluoromethane

87,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Ethylbenzene

5,800

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Isopropylbenzene

1,900,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Methyl Acetate

78,000,000

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

Methyl-t-butyl ether

47,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Methylcyclohexane

NE

<18

<24

<19

<18

<23

<17

<18

<17

<17

<17

Methylene Chloride

57,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Naphthalene

3,800

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Styrene

6,000,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Tetrachloroethene

24,000

<4.5

8.2

<4.7

<4.6

<5.8

4.8

8.9

<4.3

<4.2

4.8

Toluene

4,900,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Trichloroethene

940

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Trichlorofluoromethane

23,000,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

Vinyl Chloride

59

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

cis-l,2-Dichloroethene

160,000

<4.5

28

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

cis-l,3-Dichloropropene

NE

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

m,p-Xylenes

1,010,000

<9.0

<12

<9.3

<9.2

<12

<8.6

<9.0

<8.6

<8.4

<8.6

o-Xylene

650,000

<4.5

<6.0

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

trans-l,2-Dichloroethene

1,600,000

<4.5

13

<4.7

<4.6

<5.8

<4.3

<4.5

<4.3

<4.2

<4.3

trans-l,3-Dichloropropene

NE

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Pageiofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-2

ESB-2

ESB-6

ESB-7

ESB-8

ESB-8 DUP

ESB-16

ESB-16

Depth (feet)

0-0.5

4-5

4-5

4-5

9-10

9-10

3-4

9-10

Sample Date

12/13/2006

12/26/2006

12/13/2006

VOCs

(mg/kg)



Acetone

61,000

















Benzene

1.2

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Butanone, 2- (MEK)

27,000

<0.021

<0.016

<0.023

<0.020

<0.020

<0.023

<0.019

<0.019

Carbon Disulfide

770

<0.101

<0.008

<0.102

<0.102

<0.010

<0.101

<0.010

<0.010

Carbon tetrachloride

0.65

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Chlorobenzene

280

<0.005

<0.005

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Chloroform

0.32

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

cis-l,2-Dichloroethene

160

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Cyclohexane

6,500

<0.021

<0.016

<0.023

0.027

<0.020

<0.023

<0.019

<0.019

Dichlorobenzene, 1,2-

1,800

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Dichlorobenzene,l,3-

NE

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Dichloroethene, 1,1-

230

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Ethylbenzene

5.8

<0.005

<0.004

<0.006

0.014

<0.005

<0.006

<0.005

<0.005

Hexanone, 2-(MBK)

200

<0.021

<0.016

<0.023

<0.020

<0.020

<0.023

<0.019

<0.019

Isopropylbenzene

1,900

<0.005

<0.004

<0.006

0.007

<0.005

<0.006

<0.005

<0.005

m&p-Xylene

1,010

<0.011

<0.008

<0.012

0.065

<0.010

<0.011

<0.010

<0.019

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.021

<0.016

<0.023

<0.020

<0.020

<0.023

<0.019

<0.019

Methylcyclohexane

NE

<0.021

<0.016

<0.023

4.3 K

<0.020

<0.023

<0.019

<0.019

Methylene chloride

57

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Naphthalene

3.8

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

o-Xylene

650

<0.005

<0.004

<0.006

0.023

<0.005

<0.006

<0.005

<0.005

Tetrachloroethane, 1,1,2,2-

2.0

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Tetrachloroethene

24

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Toluene

4,900

<0.005

<0.004

<0.006

0.005 J

<0.005

<0.006

<0.005

<0.005

trans-l,2-Dichloroethene

1,600

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Trichloroethene

0.94

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Trichlorofluoromethane

23,000

<0.005

<0.004

<0.006

<0.006

<0.005

<0.006

<0.005

<0.005

Vinyl Chloride

0.059

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page2ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-17

ESB-18

ESB-19

ESB-22

ESB-22

ESB-34

ESB-34

ESB-35

Depth (feet)

0-0.5

0-0.5

0-0.5

0-0.5

4-5

0-0.5

4-5

4-5

Sample Date

12/08/2006

12/14/2006

12/13/2006

12/12/2006

12/13/2006

12/08/2006

VOCs

(mg/kg)



Acetone

61,000

0.062















Benzene

1.2

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Butanone, 2- (MEK)

27,000

<0.030

<0.019

<0.020

<0.018

<0.023

<0.018

<0.015

<0.019

Carbon Disulfide

770

<0.105

<0.010

<0.010

<0.009

<0.102

<0.009

<0.007

<0.01

Carbon tetrachloride

0.65

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Chlorobenzene

280

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Chloroform

0.32

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

cis-l,2-Dichloroethene

160

<0.007

<0.005

0.003J

<0.005

<0.006

<0.005

<0.004

<0.005

Cyclohexane

6,500

<0.030

<0.019

<0.020

<0.018

<0.023

<0.018

<0.015

<0.019

Dichlorobenzene, 1,2-

1,800

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Dichlorobenzene,l,3-

NE

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Dichloroethene, 1,1-

230

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Ethylbenzene

5.8

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Hexanone, 2-(MBK)

200

<0.030

<0.019

<0.020

<0.018

<0.023

<0.018

<0.015

<0.019

Isopropylbenzene

1,900

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

m&p-Xylene

1,010

<0.015

<0.009

<0.010

<0.009

<0.012

<0.009

<0.007

<0.01

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.030

<0.019

<0.020

<0.018

<0.023

<0.018

<0.015

<0.019

Methylcyclohexane

NE

<0.030

<0.019

<0.020

<0.018

<0.023

<0.018

<0.015

<0.019

Methylene chloride

57

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Naphthalene

3.8

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

o-Xylene

650

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Tetrachloroethane, 1,1,2,2-

2.0

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Tetrachloroethene

24

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Toluene

4,900

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

trans-l,2-Dichloroethene

1,600

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Trichloroethene

0.94

<0.007

<0.005

0.091

<0.005

<0.006

<0.005

<0.004

<0.005

Trichlorofluoromethane

23,000

<0.007

<0.005

<0.005

<0.005

<0.006

<0.005

<0.004

<0.005

Vinyl Chloride

0.059

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page3ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-42B

ESB-44

ESB-44

ESB-47

ESB-53B

ESB-54

ESB-54

ESB-54 DUP

Depth (feet)

14-15

0-0.5

4-5

3-4

11-12

0-0.5

3-3.5

3-3.5

Sample Date

12/12/2006

12/26/2006

12/08/2006

12/12/2006

01/18/2007

VOCs

(mg/kg)



Acetone

61,000









0.025 K







Benzene

1.2

0.74 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Butanone, 2- (MEK)

27,000

0.086 K

<0.018

<0.022

<0.021

<0.02

<0.019

<0.021

<0.033

Carbon Disulfide

770

<0.01

<0.009

-<0.01

<0.011

<0.01

<0.005

<0.005

<0.033

Carbon tetrachloride

0.65

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Chlorobenzene

280

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Chloroform

0.32

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

cis-l,2-Dichloroethene

160

<0.005

<0.005

<0.005

0.003 K

<0.005

<0.005

<0.005

<0.008

Cyclohexane

6,500

0.07 K

<0.018

<0.022

<0.021

<0.02

<0.019

<0.021

<0.033

Dichlorobenzene, 1,2-

1,800

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Dichlorobenzene,l,3-

NE

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Dichloroethene, 1,1-

230

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Ethylbenzene

5.8

0.17 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Hexanone, 2-(MBK)

200

0.086 K

<0.018

<0.022

<0.021

<0.02

<0.019

<0.021

<0.033

Isopropylbenzene

1,900

0.009 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

m&p-Xylene

1,010

0.500 K

<0.009

-<0.011

<0.011

<0.01

<0.01

<0.01

<0.016

Methyl, 4-Pentanone, -2- (MIBK)

33,000

0.043 K

<0.018

<0.022

<0.021

<0.02

<0.019

<0.021

<0.033

Methylcyclohexane

NE

0.026 K

<0.018

<0.022

<0.021

<0.02

<0.019

<0.021

<0.033

Methylene chloride

57

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Naphthalene

3.8

0.12 K

0.007 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

o-Xylene

650

0.22 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Tetrachloroethane, 1,1,2,2-

2.0

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Tetrachloroethene

24

<0.005

<0.005

0.039 K

0.045 K

<0.005

<0.005

<0.005

<0.008

Toluene

4,900

1.5 K

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

trans-l,2-Dichloroethene

1,600

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Trichloroethene

0.94

<0.005

<0.005

<0.005

0.022 K

<0.005

<0.005

<0.005

<0.008

Trichlorofluoromethane

23,000

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.008

Vinyl Chloride

0.059

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page4ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-56

ESB-56

ESB-59

ESB-60

ESB-60

ESB-61

ESB-61

ESB-62

Depth (feet)

0-0.5

2-3

0-0.83

9-10

19-20

2-3

14-15

3-4

Sample Date

01/18/2007

08/14/2007

08/14/2007

VOCs

(mg/kg)



Acetone

61,000

0.03















Benzene

1.2

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Butanone, 2- (MEK)

27,000

<0.019

<0.02

<0.02

<0.02

<0.018

<0.019

<0.018

<0.018

Carbon Disulfide

770

<0.005

<0.01

<0.01

<0.01

<0.01

<0.01

<0.01

<0.01

Carbon tetrachloride

0.65

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Chlorobenzene

280

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Chloroform

0.32

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

cis-l,2-Dichloroethene

160

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Cyclohexane

6,500

<0.019

<0.02

<0.02

<0.02

<0.018

<0.019

<0.018

<0.018

Dichlorobenzene, 1,2-

1,800

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Dichlorobenzene,l,3-

NE

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Dichloroethene, 1,1-

230

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Ethylbenzene

5.8

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Hexanone, 2-(MBK)

200

<0.019

<0.02

<0.02

<0.02

<0.018

<0.019

<0.018

<0.018

Isopropylbenzene

1,900

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

m&p-Xylene

1,010

<0.01

<0.01

<0.01

<0.01

<0.009

<0.009

<0.009

<0.009

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.019

<0.02

<0.02

<0.02

<0.018

<0.019

<0.018

<0.018

Methylcyclohexane

NE

<0.019

<0.02

<0.02

<0.02

<0.018

<0.019

<0.018

<0.018

Methylene chloride

57

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Naphthalene

3.8

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

o-Xylene

650

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Tetrachloroethane, 1,1,2,2-

2.0

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Tetrachloroethene

24

<0.005

<0.005

<0.005

0.59

<0.005

<0.005

<0.005

<0.005

Toluene

4,900

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

trans-l,2-Dichloroethene

1,600

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Trichloroethene

0.94

<0.005

<0.005

<0.005

0.59

<0.005

<0.005

<0.005

<0.005

Trichlorofluoromethane

23,000

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

<0.005

Vinyl Chloride

0.059

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page5ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-62

ESB-63

ESB-63

ESB-64

ESB-64 DUP

ESB-64

ESB-65

ESB-65

Depth (feet)

14-15

7-8

14-15

5-6

5-6

14-15

8-9

14-15

Sample Date

08/14/2007

VOCs

(mg/kg)



Acetone

61,000

















Benzene

1.2

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Butanone, 2- (MEK)

27,000

<0.018

<0.018

<0.017

<0.019

<0.021

<0.018

<0.019

<0.017

Carbon Disulfide

770

<0.01

<0.01

<0.01

<0.01

<0.01

<0.01

<0.005

<0.010

Carbon tetrachloride

0.65

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Chlorobenzene

280

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Chloroform

0.32

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

cis-l,2-Dichloroethene

160

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Cyclohexane

6,500

<0.018

<0.018

<0.017

<0.019

<0.021

<0.018

<0.019

<0.017

Dichlorobenzene, 1,2-

1,800

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Dichlorobenzene,l,3-

NE

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Dichloroethene, 1,1-

230

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Ethylbenzene

5.8

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Hexanone, 2-(MBK)

200

<0.018

<0.018

<0.017

<0.019

<0.021

<0.018

<0.019

<0.017

Isopropylbenzene

1,900

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

m&p-Xylene

1,010

<0.009

<0.009

<0.008

<0.01

<0.01

<0.009

<0.009

<0.009

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.018

<0.018

<0.017

<0.019

<0.021

<0.018

<0.019

<0.017

Methylcyclohexane

NE

<0.018

<0.018

<0.017

<0.019

<0.021

<0.018

<0.019

<0.017

Methylene chloride

57

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Naphthalene

3.8

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

o-Xylene

650

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Tetrachloroethane, 1,1,2,2-

2.0

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Tetrachloroethene

24

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Toluene

4,900

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

trans-l,2-Dichloroethene

1,600

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Trichloroethene

0.94

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Trichlorofluoromethane

23,000

<0.005

<0.004

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

Vinyl Chloride

0.059

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page6ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-66

ESB-67

ESB-68

ESB-69

ESB-69

ESB-70

ESB-71

ESB-72

Depth (feet)

27.5-28.5

9-10

8.5-9.5

13-14

28-29

30-31

4-5

37-37.5

Sample Date

08/14/2007

08/15/2007

08/15/2007

08/28/2007

VOCs

(mg/kg)



Acetone

61,000



0.11

0.015 J

0.027









Benzene

1.2

<0.004

<0.005

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Butanone, 2- (MEK)

27,000

<0.017

<0.02

<0.018

<0.024

<0.02

<1.0

<0.84

<1.7

Carbon Disulfide

770

<0.010

<0.01

<0.009

<0.012

<0.01

<0.52

<0.42

<0.87

Carbon tetrachloride

0.65

<0.004

<0.005

<0.005

0.005 J

<0.005

<0.26

<0.21

<0.43

Chlorobenzene

280

<0.004

0.005 J

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Chloroform

0.32

<0.004

0.12

0.004 J

0.072

<0.005

<0.26

<0.21

<0.43

cis-l,2-Dichloroethene

160

<0.004

11

0.75

1.0

0.017

<0.26

<0.21

0.3 J

Cyclohexane

6,500

<0.017

<0.02

<0.018

<0.024

<0.02

<1.0

<0.84

<1.7

Dichlorobenzene, 1,2-

1,800

<0.004

0.003 J

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Dichlorobenzene,l,3-

NE

<0.004

0.004 J

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Dichloroethene, 1,1-

230

<0.004

0.012

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Ethylbenzene

5.8

0.005 J

<0.005

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Hexanone, 2-(MBK)

200

<0.017

<0.02

<0.018

<0.024

<0.02

<1.0

<0.84

<1.7

Isopropylbenzene

1,900

<0.004

<0.005

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

m&p-Xylene

1,010

0.014 J

<0.01

<0.009

<0.012

<0.01

<0.52

<0.42

<0.87

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.017

<0.02

<0.018

<0.024

<0.02

<1.0

<0.84

<1.7

Methylcyclohexane

NE

<0.017

<0.02

<0.018

<0.024

<0.02

<1.0

<0.84

<1.7

Methylene chloride

57

<0.004

0.042

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Naphthalene

3.8

0.002 J

0.005 J

<0.005

0.045

<0.005

3.6

<0.21

0.24 J

o-Xylene

650

0.009 J

<0.005

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Tetrachloroethane, 1,1,2,2-

2.0

<0.004

0.017

<0.005

200 J

0.024

17

3.3

9.1

Tetrachloroethene

24

<0.004

210 J

16

<0.006

<0.005

<0.26

<0.21

<0.43

Toluene

4,900

0.033 J

0.004 J

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

trans-l,2-Dichloroethene

1,600

<0.004

0.17

0.011

<0.006

<0.005

<0.26

<0.21

<0.43

Trichloroethene

0.94

<0.004

9.6

0.67

3.1

0.006

<0.26

0.25

0.58

Trichlorofluoromethane

23,000

<0.004

<0.005

<0.005

<0.006

<0.005

<0.26

<0.21

<0.43

Vinyl Chloride

0.059



0.15

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page7ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-73

ESB-73

ESB-74

ESB-74

ESB-74

ESB-75

ESB-75

ESB-76

Depth (feet)

3-4

18-19

4-5

17-18

25-26

4-5

27-28

6-7

Sample Date

08/28/2007

VOCs

(mg/kg)



Acetone

61,000

















Benzene

1.2

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Butanone, 2- (MEK)

27,000

<1.7

<3.3

<1.8

<1,100

<1.7

<0.019

<1.7

<2.2

Carbon Disulfide

770

<0.85

<1.7

<0.88

<550

<0.86

<0.01

<0.84

<1.1

Carbon tetrachloride

0.65

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Chlorobenzene

280

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Chloroform

0.32

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

cis-l,2-Dichloroethene

160

1.6

<0.84

2

<270

1.3

<0.005

0.42

<0.56

Cyclohexane

6,500

<1.7

<3.3

<1.8

<1,100

<1.7

<0.019

<1.7

<2.2

Dichlorobenzene, 1,2-

1,800

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Dichlorobenzene,l,3-

NE

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Dichloroethene, 1,1-

230

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Ethylbenzene

5.8

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Hexanone, 2-(MBK)

200

<1.7

<3.3

<1.8

<1,100

<1.7

<0.019

<1.7

<2.2

Isopropylbenzene

1,900

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

m&p-Xylene

1,010

<0.85

<1.7

<0.88

<550

<0.86

<0.01

<0.84

<1.1

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<1.7

<3.3

<1.8

<1,100

<1.7

<0.019

<1.7

<2.2

Methylcyclohexane

NE

<1.7

<3.3

<1.8

<1,100

<1.7

<0.019

<1.7

<2.2

Methylene chloride

57

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Naphthalene

3.8

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

o-Xylene

650

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Tetrachloroethane, 1,1,2,2-

2.0

51

48

17

5,200

0.36 J

<0.005

<0.42

6.3

Tetrachloroethene

24

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Toluene

4,900

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

trans-l,2-Dichloroethene

1,600

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Trichloroethene

0.94

4.2

1.3

3

<270

<0.43

<0.005

<0.42

<0.56

Trichlorofluoromethane

23,000

<0.43

<0.84

<0.44

<270

<0.43

<0.005

<0.42

<0.56

Vinyl Chloride

0.059















0.46

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page8ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-76

ESB-76DUP

ESB-78

ESB-79

ESB-80

ESB-81

ESB-82

ESB-83

Depth (feet)

20-21

20-21

65-65.3

5-6

15-15.5

2-3

16-17

14-15

Sample Date

08/28/2007

09/02/2008

09/04/08

09/04/2008

VOCs

(mg/kg)



Acetone

61,000



0.011 J









0.016 L

0.44 L

Benzene

1.2

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Butanone, 2- (MEK)

27,000

<1.8

<0.017

<0.021 UL

<0.019 UL

<0.021 UL

<0.019 UL

<0.016 UL

<0.048 UJ

Carbon Disulfide

770

<0.920

<0.009

<0.01

<0.01

<0.01

<0.01

<0.008

0.031 J

Carbon tetrachloride

0.65

<0.460

<0.004

<0.005

0.003 J

0.022

<0.005

<0.004

<0.012 UJ

Chlorobenzene

280

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Chloroform

0.32

<0.460

<0.004

<0.005

<0.005

0.024

0.002 J

0.17

<0.012 UJ

cis-l,2-Dichloroethene

160

<0.460

0.003 J

0.21

<0.005

0.037

0.26

8.6 K

330 K

Cyclohexane

6,500

<1.8

<0.017

<0.021

<0.019

<0.021

<0.019

<0.016

<0.048 UJ

Dichlorobenzene, 1,2-

1,800

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Dichlorobenzene,l,3-

NE

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Dichloroethene, 1,1-

230

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Ethylbenzene

5.8

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Hexanone, 2-(MBK)

200

<1.8

<0.017

<0.021

<0.019 UL

<0.021 UL

<0.019 UL

<0.016 UL

<0.048 UJ

Isopropylbenzene

1,900

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

m&p-Xylene

1,010

<0.920

<0.009

<0.01

<0.005

<0.01

<0.01

<0.008

<0.024 UJ

Methyl, 4-Pentanone, -2- (MIBK)

33,000

<1.8

<0.017

<0.021 UL

<0.019 UL

<0.021 UL

<0.019 UL

<0.016 UL

<0.048 UJ

Methylcyclohexane

NE

<1.8

<0.017

<0.021

<0.019

<0.021

<0.019

<0.016

<0.048 UJ

Methylene chloride

57

<0.460

<0.004

0.002

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Naphthalene

3.8

<0.460

0.003 J

0.01

<0.005 UL

<0.005 UL

<0.005 UL

0.003 L

0.022 L

o-Xylene

650

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Tetrachloroethane, 1,1,2,2-

2.0

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

0.097 J

Tetrachloroethene

24

0.490 J

0.190

5.2

3.4 K

69 K

170 K

130 K

1,600 K

Toluene

4,900

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

0.012 L

0.022 J

trans-l,2-Dichloroethene

1,600

<0.460

<0.004

0.017

<0.005

<0.005

0.005 J

<0.004

2.8 K

Trichloroethene

0.94

<0.460

0.011

0.72 J

0.013 J

0.24 J

0.25 J

11 K

94 K

Trichlorofluoromethane

23,000

<0.460

<0.004

<0.005

<0.005

<0.005

<0.005

<0.004

<0.012 UJ

Vinyl Chloride

0.059





0.015







0.072

7.2 K

-------
Table 2B	Yard 56

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	Page9ofii

Sample Identification

USEPA Region 3
Residential RSLs

ESB-84

ESB-87

ESB-88

ESB-88 Dup

ESB-89

ESB-89A

ESB-90

ESB-93

Depth (feet)

6-6.5

12-13

14-15

14-15

12-13

12-13

8-9

14-15

Sample Date

09/04/2008

10/22/2013

VOCs

(mg/kg)



Acetone

61,000

0.013 L

0.053 L













Benzene

1.2

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Butanone, 2- (MEK)

27,000

0.160 L

<0.019 UL

<0.019 UJ

<0.019 UJ









Carbon Disulfide

770

0.009 L

<0.009

<0.009 UJ

<0.009 UJ









Carbon tetrachloride

0.65

<0.005

<0.005

<0.005 UJ

<0.005 UJ









Chlorobenzene

280

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Chloroform

0.32

<0.005 UL

0.004 J

<0.005 UJ

<0.005 UJ









cis-l,2-Dichloroethene

160

3.4 K

0.11

0.004 J

0.003 J









Cyclohexane

6,500

<0.019 UL

<0.019

<0.019 UJ

<0.019 UJ









Dichlorobenzene, 1,2-

1,800

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Dichlorobenzene,l,3-

NE

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Dichloroethene, 1,1-

230

0.003 J

<0.019

<0.019 UJ

<0.019 UJ









Ethylbenzene

5.8

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Hexanone, 2-(MBK)

200

<0.019 UL

<0.019 UL

<0.019 UJ

<0.019 UJ









Isopropylbenzene

1,900

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









m&p-Xylene

1,010

<0.009 UL

<0.009

<0.009 UJ

<0.009 UJ









Methyl, 4-Pentanone, -2- (MIBK)

33,000

<0.019 UL

<0.019 UL

<0.019 UJ

<0.019 UJ









Methylcyclohexane

NE

<0.019 UL

<0.019

<0.019 UJ

<0.019 UJ









Methylene chloride

57

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Naphthalene

3.8

<0.005 UL

<0.005 UL

<0.005 UJ

<0.005 UJ









o-Xylene

650

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Tetrachloroethane, 1,1,2,2-

2.0

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









Tetrachloroethene

24

2.4 K

18 K

0.006 J

0.005 J

6,300

4,300

<0.0041

0.004 J

Toluene

4,900

<0.005 UL

<0.005

<0.005 UJ

<0.005 UJ









trans-l,2-Dichloroethene

1,600

0.031 L

<0.005

<0.005 UJ

<0.005 UJ









Trichloroethene

0.94

0.29

0.22 J

0.005 J

0.003 J

130

76

<0.0041

<0.061

Trichlorofluoromethane

23,000

<0.005

<0.005

<0.005

<0.005









Vinyl Chloride

0.059

0.2



0.025 J

-------
Table 2B	Yard

VOC Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	PageiOofii

Sample Identification

USEPA Region 3
Residential RSLs

USB-1

USB-2

USB-3

USB-4

USB-5

USB-6

USB-7

USB-8

Depth (feet)

18-20

26-28

4-6

28-30

14-16

28-30

4-6

24-26

Sample Date

09/12/2013

09/13/2013

09/12/2013

VOCs

(mg/kg)



Acetone

61,000

















Benzene

1.2

















Butanone, 2- (MEK)

27,000

















Carbon Disulfide

770

















Carbon tetrachloride

0.65

















Chlorobenzene

280

















Chloroform

0.32

















cis-l,2-Dichloroethene

160

170

<0.004

<0.540

0.096

<0.005

210

0.7

0.029

Cyclohexane

6,500

















Dichlorobenzene, 1,2-

1,800

















Dichlorobenzene,l,3-

NE

















Dichloroethene, 1,1-

230

















Ethylbenzene

5.8

















Hexanone, 2-(MBK)

200

















Isopropylbenzene

1,900

















m&p-Xylene

1,010

















Methyl, 4-Pentanone, -2- (MIBK)

33,000

















Methylcyclohexane

NE

















Methylene chloride

57

















Naphthalene

3.8

















o-Xylene

650

















Tetrachloroethane, 1,1,2,2-

2.0

















Tetrachloroethene

24

45

0.014

16

0.01

0.02

13,000

5.6

0.018

Toluene

4,900

















trans-l,2-Dichloroethene

1,600

















Trichloroethene

0.94

280

<0.004

0.75

<0.004

<0.005

160

0.59

<0.005

Trichlorofluoromethane

23,000

















Vinyl Chloride

0.059







0.2







0.39

-------
Yard 56

Baltimore City Maryland
GTA Project No. 140080
Page 11 of 11

Sample Identification

USEPA Region 3
Residential RSLs

USB-9

USB-10

USB-11

USB-12

USB-13

Depth (feet)

8-10

8-10

0-2

10-12

16-18

Sample Date

03/12/2013

VOCs

(mg/kg)



Acetone

61,000











Benzene

1.2











Butanone, 2- (MEK)

27,000











Carbon Disulfide

770











Carbon tetrachloride

0.65











Chlorobenzene

280











Chloroform

0.32











cis-l,2-Dichloroethene

160

0.72

<0.490

<0.520

<0.006

<0.029

Cyclohexane

6,500











Dichlorobenzene, 1,2-

1,800











Dichlorobenzene,l,3-

NE











Dichloroethene, 1,1-

230











Ethylbenzene

5.8











Hexanone, 2-(MBK)

200











Isopropylbenzene

1,900











m&p-Xylene

1,010











Methyl, 4-Pentanone, -2- (MIBK)

33,000











Methylcyclohexane

NE











Methylene chloride

57











Naphthalene

3.8











o-Xylene

650











Tetrachloroethane, 1,1,2,2-

2.0











Tetrachloroethene

24

4.6

19

3.5

0.026

0.29

Toluene

4,900











trans-l,2-Dichloroethene

1,600











Trichloroethene

0.94

<0.580

<0.490

<0.520

<0.006

<0.029

Trichlorofluoromethane

23,000











Vinyl Chloride

0.059











Table 2B

VOC Soil Characterization Summary
Pre-2014 Sampling

-------
Table 3A	Yard56

SVOC and PCB Soil Characterization Summary	Baltimore City Maryland

„	„	GTA Project No. 140080

2014 Samp ing	„ „

r °	Page 1 of 5

Sample Identification

USE PA Region 3
Residential RSLs

GTA-SB-1

GTA-SB-1

GTA-SB-2

GTA-SB-2

GTA-SB-3

GTA-SB-3

GTA-SB-4

GTA-SB-4

GTA-SB-5

GTA-SB-5

GTA-SB-6

GTA-SB-6

GTA-SB-7

GTA-SB-7

GTA-SB-8

GTA-SB-8

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

SVOCs

(mg/kg)



2,4,5-T richlorophenol

6,300

































2,4,6-T richlorophenol

49

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2,4-Dichlorophenol

190

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2,4-Dimethylphenol

1,300

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2,4-Dinitrophenol

130

<0.36

<0.40

<0.37

<0.39

<0.40

<0.37

<0.39

<0.40

<0.40

<0.41

<0.40

<0.38

<0.39

<0.41

<0.40

<0.41

2,4-Dinitrotoluene

1.70

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2,6-Dinitrotoluene

0.36

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Chloronaphthalene

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Chlorophenol

390

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Methyl phenol

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Methyinaphthalene

240

<0.18

<0.20

<0.19

0.24

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Nitroaniline

630

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

2-Nitrophenol

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

3&4-Methylphenol

63

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

3,3-Dichlorobenzidine

1.2

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

3-Nitroaniline

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4,6-Dinitro-2-methyl phenol

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Bromophenylphenyl ether

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Chloro-3-methyl phenol

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Chloroaniline

2.7

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Chlorophenyl Phenyl ether

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Nitroaniline

27

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

4-Nitrophenol

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Acenaphthene

3,600

<0.18

<0.20

<0.19

1.3

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Acenaphthylene

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Acetophenone

7,800

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Anthracene

18,000

<0.18

<0.20

<0.19

2.7

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Atrazine

2.4

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Benzo(a)anthracene

1.1

<0.18

<0.20

<0.19

5.8

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Benzo(a)pyrene

0.11

<0.18

<0.20

<0.19

5.0

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Benzo(b)fluoranthene

1.1

<0.18

<0.20

<0.19

4.4

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Benzo(g,h,i)perylene

NE

<0.18

<0.20

<0.19

2.5

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Benzo(k)fluoranthene

11

<0.18

<0.20

<0.19

4.6

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Biphenyi (Diphenyl)

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Butyl benzyl phthalate

290

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Caprolactam

31,000

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Carbazole

NE

<0.18

<0.20

<0.19

4.5

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Chrysene

110

<0.18

<0.20

<0.19

5.8

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Di-n-butyl phthalate

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Di-n-octyl phthalate

630

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Dibenz(a,h)Anthracene

0.11

<0.18

<0.20

<0.19

1.1

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Dibenzofuran

73

<0.18

<0.20

<0.19

0.8

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Diethyl phthalate

51,000

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Dimethyl phthalate

7,800

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Fluoranthene

2,400

<0.18

<0.20

<0.19

12

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Fluorene

2,400

<0.18

<0.20

<0.19

1.4

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Hexachlorobenzene

0.21

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Hexachlorobutadiene

1.2

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Hexachlorocyclopentadiene

1.8

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Hexachloroethane

1.8

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

lndeno(l,2,3-c,d)Pyrene

1.1

<0.18

<0.20

<0.19

2.6

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Isophorone

570

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

N-Nitrosodi-n-propyl amine

0.078

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

N-Nitrosodiphenylamine

110

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Naphthalene

3.8

<0.18

<0.20

<0.19

0.36

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Nitrobenzene

5.1

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Pentachlorophenol

1.0

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Phenanthrene

NE

<0.18

<0.20

<0.19

11

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Phenol

19,000

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Pyrene

1,800

<0.18

<0.20

<0.19

11

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

Pyridine

78

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

bis(2-chloroethoxy) methane

190

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

bis(2-chloroethyl) ether

0.23

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

bis(2-chloroisopropyl) ether

NE

<0.18

<0.20

<0.19

<0.19

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.20

<0.20

<0.20

<0.20

bis(2-ethylhexyl) phthalate

39











<0.19





















PCBs

(mg/kg)

































PCB-1016

4.1

































PCB-1221

0.2

































PCB-1232

0.17

































PCB-1242

0.23

































PCB-1248

0.23

































PCB-1254

0.24

































PCB-1260

0.24

-------
Table 3A	Yard56

SVOC and PCB Soil Characterization Summary	Baltimore City Maryland

„	„	GTA Project No. 140080

2014 Sampling

Sample Identification

USE PA Region 3
Residential RSLs

GTA-SB-9

GTA-SB-9

GTA-SB-10

GTA-SB-10

GTA-SB-11

GTA-SB-11

GTA-SB-12

GTA-SB-12

GTA-SB-13

GTA-SB-13

GTA-SB-14

GTA-SB-14

GTA-SB-15

GTA-SB-15

GTA-SB-16

GTA-SB-16

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

SVOCs

(mg/kg)



2,4,5-T richlorophenol

6,300

































2,4,6-T richlorophenol

49

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2,4-Dichlorophenol

190

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2,4-Dimethylphenol

1,300

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2,4-Dinitrophenol

130

<0.37

<0.38

<0.360

<0.39

<0.40

<0.39

<0.39

<0.39

<0.40

<0.41

<0.40

<0.39

<0.41

<0.41

<0.41

<0.40

2,4-Dinitrotoluene

1.70

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2,6-Dinitrotoluene

0.36

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Chloronaphthalene

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Chlorophenol

390

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Methyl phenol

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Methyinaphthalene

240

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Nitroaniline

630

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

2-Nitrophenol

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

3&4-Methylphenol

63

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

3,3-Dichlorobenzidine

1.2

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

3-Nitroaniline

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4,6-Dinitro-2-methyl phenol

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Bromophenylphenyl ether

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Chloro-3-methyl phenol

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Chloroaniline

2.7

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Chlorophenyl Phenyl ether

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Nitroaniline

27

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

4-Nitrophenol

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Acenaphthene

3,600

<0.19

<0.19

<0.180

<0.20

0.320

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Acenaphthylene

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Acetophenone

7,800

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Anthracene

18,000

0.33

<0.19

<0.180

<0.20

0.940

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Atrazine

2.4

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Benzo(a)anthracene

1.1

1.6

0.530

<0.180

<0.20

2.6

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Benzo(a)pyrene

0.11

1.5

0.470

<0.180

<0.20

2.2

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Benzo(b)fluoranthene

1.1

1.5

0.480

<0.180

<0.20

2.4

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Benzo(g,h,i)perylene

NE

0.880

0.260

<0.180

<0.20

1.0

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Benzo(k)fluoranthene

11

1.1

0.460

<0.180

<0.20

1.8

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Biphenyi (Diphenyl)

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Butyl benzyl phthalate

290

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Caprolactam

31,000

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Carbazole

NE

<0.19

<0.19

<0.180

<0.20

0.330

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Chrysene

110

1.7

0.560

<0.180

<0.20

2.7

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Di-n-butyl phthalate

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Di-n-octyl phthalate

630

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Dibenz(a,h)Anthracene

0.11

<0.19

<0.19

<0.180

<0.20

0.440

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Dibenzofuran

73

<0.19

<0.19

<0.180

<0.20

0.230

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Diethyl phthalate

51,000

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Dimethyl phthalate

7,800

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Fluoranthene

2,400

2.3

0.910

<0.180

<0.20

4.7

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Fluorene

2,400

<0.19

<0.19

<0.180

<0.20

0.410

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Hexachlorobenzene

0.21

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Hexachlorobutadiene

1.2

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Hexachlorocyclopentadiene

1.8

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Hexachloroethane

1.8

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

lndeno(l,2,3-c,d)Pyrene

1.1

1.1

0.300

<0.180

<0.20

1.2

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Isophorone

570

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

N-Nitrosodi-n-propyl amine

0.078

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

N-Nitrosodiphenylamine

110

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Naphthalene

3.8

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Nitrobenzene

5.1

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Pentachlorophenol

1.0

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Phenanthrene

NE

1.4

0.540

<0.180

<0.20

3.3

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Phenol

19,000

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Pyrene

1,800

2.2

0.860

<0.180

<0.20

3.9

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

Pyridine

78

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

bis(2-chloroethoxy) methane

190

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

bis(2-chloroethyl) ether

0.23

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

bis(2-chloroisopropyl) ether

NE

<0.19

<0.19

<0.180

<0.20

<0.20

<0.19

<0.19

<0.20

<0.20

<0.21

<0.20

<0.19

<0.21

<0.21

<0.21

<0.20

bis(2-ethylhexyl) phthalate

39



<0.19

<0.180

<0.20



<0.19

<0.19

<0.20



<0.21

<0.20





<0.21

<0.21



PCBs

(mg/kg)

























PCB-1016

4.1

































PCB-1221

0.2





<0.054

<0.058























<0.060

PCB-1232

0.17





<0.054

<0.058























<0.060

PCB-1242

0.23





<0.054

<0.058























<0.060

PCB-1248

0.23





<0.054

<0.058























<0.060

PCB-1254

0.24





<0.054

<0.058























<0.060

PCB-1260

0.24





<0.054

<0.058























<0.060

-------
Table 3A	Yard56

SVOC and PCB Soil Characterization Summary	Baltimore City Maryland

„	„	GTA Project No. 140080

2014 Sampling

Sample Identification

USE PA Region 3
Residential RSLs

GTA-SB-17

GTA-SB-17

GTA-SB-18

GTA-SB-18

GTA-SB-23

GTA-SB-23

GTA-SB-24

GTA-SB-24

GTA-SB-25

GTA-SB-25

GTA-SB-26

GTA-SB-26

GTA-SB-27

GTA-SB-27

GTA-SB-28

GTA-SB-28

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

11/18/2014

SVOCs

(mg/kg)



2,4,5-T richlorophenol

6,300

































2,4,6-T richlorophenol

49

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2,4-Dichlorophenol

190

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2,4-Dimethylphenol

1,300

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2,4-Dinitrophenol

130

<0.41

<0.39

<0.39

<0.40

<0.37

<0.38

<0.37

<0.39

<0.39

<0.39

<420

<0.39

<430

<0.38

<0.38

<0.38

2,4-Dinitrotoluene

1.70

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2,6-Dinitrotoluene

0.36

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Chloronaphthalene

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Chlorophenol

390

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Methyl phenol

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Methyinaphthalene

240

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Nitroaniline

630

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

2-Nitrophenol

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

3&4-Methylphenol

63

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

3,3-Dichlorobenzidine

1.2

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

3-Nitroaniline

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4,6-Dinitro-2-methyl phenol

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Bromophenylphenyl ether

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Chloro-3-methyl phenol

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Chloroaniline

2.7

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Chlorophenyl Phenyl ether

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Nitroaniline

27

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

4-Nitrophenol

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Acenaphthene

3,600

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Acenaphthylene

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Acetophenone

7,800

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Anthracene

18,000

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

0.300

Atrazine

2.4

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Benzo(a)anthracene

1.1

<0.20

<0.20

0.250

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.260

<0.22

<0.19

0.240

1.2

Benzo(a)pyrene

0.11

<0.20

<0.20

0.200

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.230

<0.22

<0.19

<0.19

1.0

Benzo(b)fluoranthene

1.1

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.210

<0.22

<0.19

<0.19

1.0

Benzo(g,h,i)perylene

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

0.640

Benzo(k)fluoranthene

11

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.220

<0.22

<0.19

0.230

0.900

Biphenyi (Diphenyl)

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Butyl benzyl phthalate

290

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Caprolactam

31,000

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Carbazole

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Chrysene

110

<0.20

<0.20

0.240

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.310

<0.22

<0.19

0.290

1.3

Di-n-butyl phthalate

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Di-n-octyl phthalate

630

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Dibenz(a,h)Anthracene

0.11

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

0.270

Dibenzofuran

73

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Diethyl phthalate

51,000

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Dimethyl phthalate

7,800

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Fluoranthene

2,400

<0.20

<0.20

0.520

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.480

<0.22

<0.19

0.390

1.7

Fluorene

2,400

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Hexachlorobenzene

0.21

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Hexachlorobutadiene

1.2

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Hexachlorocyclopentadiene

1.8

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Hexachloroethane

1.8

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

lndeno(l,2,3-c,d)Pyrene

1.1

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

0.620

Isophorone

570

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

N-Nitrosodi-n-propyl amine

0.078

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

N-Nitrosodiphenylamine

110

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Naphthalene

3.8

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Nitrobenzene

5.1

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Pentachlorophenol

1.0

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Phenanthrene

NE

<0.20

<0.20

0.580

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.450

<0.22

<0.19

0.230

1.3

Phenol

19,000

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

Pyrene

1,800

<0.20

<0.20

0.470

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

0.590

<0.22

<0.19

0.520

2.4

Pyridine

78

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

bis(2-chloroethoxy) methane

190

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

bis(2-chloroethyl) ether

0.23

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

bis(2-chloroisopropyl) ether

NE

<0.20

<0.20

<0.19

<0.20

<0.19

<0.19

<0.19

<0.20

<0.20

<0.20

<0.21

<0.20

<0.22

<0.19

<0.19

<0.19

bis(2-ethylhexyl) phthalate

39





<0.19

<0.20



<0.19

<0.19

<0.20



<0.20

<0.21





<0.19

<0.19



PCBs

(mg/kg)

























PCB-1016

4.1

































PCB-1221

0.2

<0.059







<0.054

<0.057





















PCB-1232

0.17

<0.059







<0.054

<0.057





















PCB-1242

0.23

<0.059







<0.054

<0.057





















PCB-1248

0.23

<0.059







<0.054

<0.057





















PCB-1254

0.24

<0.059







<0.054

<0.057





















PCB-1260

0.24

<0.059







<0.054

<0.057

-------
Table 3A	Yard56

SVOC and PCB Soil Characterization Summary	Baltimore City Maryland

„	„	GTA Project No. 140080

2014 Sampling

Sample Identification

USE PA Region 3
Residential RSLs

GTA-SB-29

GTA-SB-30

GTA-SB-31

GTA-SB-32

GTA-SB-33

GTA-SB-34

GTA-SB-35

GTA-SB-36

GTA-SB-37

GTA-SB-38

GTA-SB-39

GTA-SB-40

GTA-SB-41

GTA-SB-42

GTA-SB-43

GTA-SB-44

Depth (feet)

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

Sample Date

11/18/2014

SVOCs

(mg/kg)



2,4,5-T richlorophenol

6,300

































2,4,6-T richlorophenol

49

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2,4-Dichlorophenol

190

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2,4-Dimethylphenol

1,300

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2,4-Dinitrophenol

130

<0.41

<0.41

<0.37

<0.41

<2.0

<0.41

<0.38

<0.38

<0.38

<0.36

<0.50

<0.39

<0.39

<0.39

<0.38

<0.38

2,4-Dinitrotoluene

1.70

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2,6-Dinitrotoluene

0.36

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Chloronaphthalene

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Chlorophenol

390

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Methyl phenol

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Methyinaphthalene

240

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Nitroaniline

630

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

2-Nitrophenol

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

3&4-Methylphenol

63

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

3,3-Dichlorobenzidine

1.2

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

3-Nitroaniline

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4,6-Dinitro-2-methyl phenol

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Bromophenylphenyl ether

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Chloro-3-methyl phenol

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Chloroaniline

2.7

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Chlorophenyl Phenyl ether

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Nitroaniline

27

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

4-Nitrophenol

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Acenaphthene

3,600

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Acenaphthylene

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Acetophenone

7,800

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Anthracene

18,000

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Atrazine

2.4

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Benzo(a)anthracene

1.1

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Benzo(a)pyrene

0.11

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

0.21

<0.20

<0.19

Benzo(b)fluoranthene

1.1

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Benzo(g,h,i)perylene

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Benzo(k)fluoranthene

11

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

0.2

<0.20

<0.19

Biphenyi (Diphenyl)

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Butyl benzyl phthalate

290

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Caprolactam

31,000

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Carbazole

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Chrysene

110

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

0.21

<0.20

<0.19

Di-n-butyl phthalate

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Di-n-octyl phthalate

630

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Dibenz(a,h)Anthracene

0.11

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Dibenzofuran

73

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Diethyl phthalate

51,000

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Dimethyl phthalate

7,800

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Fluoranthene

2,400

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

0.38

<0.19

<0.19

0.31

<0.20

<0.19

Fluorene

2,400

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Hexachlorobenzene

0.21

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Hexachlorobutadiene

1.2

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Hexachlorocyclopentadiene

1.8

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Hexachloroethane

1.8

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

lndeno(l,2,3-c,d)Pyrene

1.1

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Isophorone

570

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

N-Nitrosodi-n-propyl amine

0.078

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

N-Nitrosodiphenylamine

110

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Naphthalene

3.8

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Nitrobenzene

5.1

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Pentachlorophenol

1.0

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Phenanthrene

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

0.19

<0.20

<0.19

Phenol

19,000

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

Pyrene

1,800

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

0.42

<0.19

<0.19

0.35

<0.20

<0.19

Pyridine

78

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

bis(2-chloroethoxy) methane

190

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

bis(2-chloroethyl) ether

0.23

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

bis(2-chloroisopropyl) ether

NE

<0.20

<0.20

<0.19

<0.21

<2.0

<0.20

<0.19

<0.19

<0.19

<0.18

<0.25

<0.19

<0.19

<0.19

<0.20

<0.19

bis(2-ethylhexyl) phthalate

39





<0.19

<0.21

<2.0



<0.19

<0.19



<0.18

<0.25

<0.19

<0.19

<0.19

<0.20



PCBs

(mg/kg)























PCB-1016

4.1

































PCB-1221

0.2

































PCB-1232

0.17

































PCB-1242

0.23

































PCB-1248

0.23

































PCB-1254

0.24

































PCB-1260

0.24

-------
Table 3A

SVOC and PCB Soil Characterization Summary
2014 Sampling

Sample Identification

US EPA Region 3
Residential RSLs

GTA-SB-45

Depth (feet)

0-2

Sample Date

11/18/2014

SVOCs

(mg/kg)



2,4,5-Trichlorophenol

6,300



2,4,6-Trichlorophenol

49

<0.21

2,4-Dichlorophenol

190

<0.21

2,4-Dimethylphenol

1,300

<0.21

2,4-Dinitrophenol

130

<0.41

2,4-Dinitrotoluene

1.70

<0.21

2,6-Dinitrotoluene

0.36

<0.21

2-Chloronaphthalene

NE

<0.21

2-Chlorophenol

390

<0.21

2-Methyl phenol

NE

<0.21

2-Methyi naphthalene

240

<0.21

2-Nitroaniline

630

<0.21

2-Nitrophenol

NE

<0.21

3&4-Methylphenol

63

<0.21

3,3-Dichlorobenzidine

1.2

<0.21

3-Nitroaniline

NE

<0.21

4,6-Dinitro-2-methyl phenol

NE

<0.21

4-Bromophenylphenyl ether

NE

<0.21

4-Chloro-3-methyl phenol

NE

<0.21

4-Chloroaniline

2.7

<0.21

4-Chlorophenyl Phenyl ether

NE

<0.21

4-Nitroaniline

27

<0.21

4-Nitrophenol

NE

<0.21

Acenaphthene

3,600

<0.21

Acenaphthylene

NE

<0.21

Acetophenone

7,800

<0.21

Anthracene

18,000

<0.21

Atrazine

2.4

<0.21

Benzo(a)anthracene

1.1

<0.21

Benzo(a)pyrene

0.11

<0.21

Benzo(b)fl uoranthene

1.1

<0.21

Benzo(g,h,i)perylene

NE

<0.21

Benzo(k)fiuoranthene

11

<0.21

Biphenyl (Diphenyl)

NE

<0.21

Butyl benzyl phthalate

290

<0.21

Ca pro lactam

31,000

<0.21

Carbazole

NE

<0.21

Chrysene

110

<0.21

Di-n-butyl phthalate

NE

<0.21

Di-n-octyl phthalate

630

<0.21

Dibenz(a,h)Anthracene

0.11

<0.21

Dibenzofuran

73

<0.21

Diethyl phthalate

51,000

<0.21

Dimethyl phthalate

7,800

<0.21

Fluoranthene

2,400

<0.21

Fluorene

2,400

<0.21

Hexachlorobenzene

0.21

<0.21

Hexachlorobutadiene

1.2

<0.21

Hexachlorocyclopentadiene

1.8

<0.21

Hexachloroethane

1.8

<0.21

lndeno(l,2,3-c,d)Pyrene

1.1

<0.21

Isophorone

570

<0.21

N-Nitrosodi-n-propyl amine

0.078

<0.21

N-Nitrosodiphenylamine

110

<0.21

Naphthalene

3.8

<0.21

Nitrobenzene

5.1

<0.21

Pentachlorophenol

1.0

<0.21

Phenanthrene

NE

<0.21

Phenol

19,000

<0.21

Pyrene

1,800

<0.21

Pyridine

78

<0.21

bis(2-chloroethoxy) methane

190

<0.21

bis(2-chloroethyl) ether

0.23

<0.21

bis(2-chloroisopropyl) ether

NE

<0.21

bis(2-ethylhexyl) phthalate

39



PCBs

(mg/kg)



PCB-1016

4.1



PCB-1221

0.2



PCB-1232

0.17



PCB-1242

0.23



PCB-1248

0.23



PCB-1254

0.24



PCB-1260

0.24



Yard 56

Baltimore City Maryland
GTA Project No. 140080
Page 5 of 5

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	pagelof8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-2

ESB-2

ESB-6

ESB-6

ESB-7

ESB-8

ESB-8 Dup

ESB-10

Depth (feet)

0-0.5

4-5

0-0.5

4-5

4-5

5-6

5-6

4-5

Sample Date

12/13/2006

12/15/2006

12/13/2006

12/07/2006

12/06/2006

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Acenaphthene

3,600

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Acenaphthylene

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Anthracene

18,000

<0.39

<0.36

<0.2

<0.39

<0.4

<0.4

<0.41

<0.43

Benzo(a)anthracene

1.1

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Benzo(a)pyrene

0.11

<0.2

<0.18

< 0.2

<0.2

< 0.2

<0.2

<0.2

<0.22

Benzo(b)fluoranthene

1.1

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Benzo(g,h,i)perylene

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Benzo(k)fluoranthene

11

<0.39

<0.36

<0.41

<0.39

0.043 J

<0.4

<0.41

<0.43

bis(2-chloroisopropyl) ether

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



bis(2-ethylhexyl) phthalate

39

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



Carbazole

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



Chrysene

110

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Dibenz(a,h)Anthracene

0.11

<0.2

<0.18

<0.2

<0.2

<0.2

<0.2

<0.4

<0.22

Dibenzofuran

73

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



Di-n-butyl phthalate

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



Fluoranthene

2,400

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Fluorene

2,400

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Hexachloroethane

1.8

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41



lndeno(l,2,3-c,d)Pyrene

1.1

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Naphthalene

3.8

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Phenanthrene

NE

<0.39

<0.36

<0.41

<0.39

<0.4

<0.4

<0.41

<0.43

Pyrene

1,800

















PCBs





PCB-1016

4.1

















PCB-1221

0.2

















PCB-1232

0.17

















PCB-1242

0.23

















PCB-1248

0.23

















PCB-1254

0.24

















PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page2of8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-13

ESB-16

ESB-17

ESB-21

ESB-21

ESB-22

ESB-22

ESB-26

Depth (feet)

4-5

3-4

0-0.5

0-0.5

4-5

0-0.5

4-5

0-0.5

Sample Date

12/06/2006

12/13/2006

12/08/2006

12/07/2006

12/12/2006

12/12/2006

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Acenaphthene

3,600

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Acenaphthylene

NE

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Anthracene

18,000

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Benzo(a)anthracene

1.1

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

Benzo(a)pyrene

0.11

<0.2

<0.2

< 1.9

< 1.9

< 1.9

<0.2

<0.2

<0.2 J

Benzo(b)fluoranthene

1.1

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

Benzo(g,h,i)perylene

NE

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

Benzo(k)fluoranthene

11

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

bis(2-chloroisopropyl) ether

NE



<0.39

<0.38





<0.39

<0.4



bis(2-ethylhexyl) phthalate

39



<0.39

<0.38





<0.39

<0.4



Carbazole

NE



<0.39

<0.38





<0.39

<0.4



Chrysene

110

<0.4

<0.4

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Dibenz(a,h)Anthracene

0.11

<0.2

<0.2

<0.38

< 1.9

< 1.9

<0.2

<0.2

<0.2 J

Dibenzofuran

73



<0.39

<0.38





<0.39

<0.4



Di-n-butyl phthalate

NE



<0.39

<0.38





<0.39

<0.4



Fluoranthene

2,400

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

Fluorene

2,400

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4 J

Hexachloroethane

1.8



<0.39

<0.38





<0.39

<0.4



lndeno(l,2,3-c,d)Pyrene

1.1

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Naphthalene

3.8

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Phenanthrene

NE

<0.39

<0.39

<0.38

<0.38

<0.37

<0.39

<0.4

<0.4

Pyrene

1,800

















PCBs





PCB-1016

4.1

















PCB-1221

0.2

















PCB-1232

0.17

















PCB-1242

0.23

















PCB-1248

0.23

















PCB-1254

0.24

















PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page3of8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-34

ESB-34

ESB-42B

ESB-44

ESB-44

ESB-45

ESB-46

ESB-47

Depth (feet)

0-0.5

4-5

14-15

0-0.5

4-5

0-0.5

0-0.5

10-11

Sample Date

12/12/2006

12/13/2006

12/12/2006

12/26/2006

12/07/2006

12/08/2006

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

<0.37

<0.37

<0.4

<0.38

0.370 J

<0.38

<0.38

<0.43

Acenaphthene

3,600

<0.37

<0.37

<0.4

<0.38

<0.37

<0.38

<0.38

<0.43

Acenaphthylene

NE

<0.37

<0.37

<0.4

<0.38

<0.37

<0.38

<0.38

<0.43

Anthracene

18,000

<0.37

<0.37

<0.4

<0.38

<0.37

<0.38

<0.38

<0.22

Benzo(a)anthracene

1.1

<0.37

<0.37

<0.4

<0.38

<0.37

0.190 J

<0.38

<0.43

Benzo(a)pyrene

0.11

<0.19

<0.18

<0.2

<0.19

<0.19

0.230

<0.19

<0.22

Benzo(b)fluoranthene

1.1

<0.37

<0.37

<0.4

<0.38

<0.37

0.280 J

<0.38

<0.43

Benzo(g,h,i)perylene

NE

<0.37

<0.37

<0.4

<0.38

<0.37

0.180 J

<0.38

<0.43

Benzo(k)fluoranthene

11

<0.37

<0.37

<0.4

<0.38

<0.37

0.160 J

<0.38

<0.43

bis(2-chloroisopropyl) ether

NE

<0.37

<0.37



<0.38

<0.37

<0.38

<0.38



bis(2-ethylhexyl) phthalate

39

<0.37

<0.37



<0.38

<0.37

<0.38

<0.38



Carbazole

NE

<0.37

<0.37



<0.38

<0.37

<0.38

<0.38



Chrysene

110

<0.37

<0.37

<0.4

<0.38

<0.37

0.220 J

<0.38

<0.43

Dibenz(a,h)Anthracene

0.11

<0.19

<0.18

<0.2

<0.19

<0.19

0.054 J

<0.19

<0.22

Dibenzofuran

73

<0.37

<0.37



<0.38

<0.37

<0.38

<0.38



Di-n-butyl phthalate

NE

<0.37

<0.37



<0.38

<0.37

<0.38

<0.38



Fluoranthene

2,400

<0.37

<0.37

<0.4

<0.38

<0.37

0.330 J

<0.38

<0.43

Fluorene

2,400

<0.37

<0.37

<0.4

<0.38

0.110 J

<0.38

<0.38

<0.43

Hexachloroethane

1.8

<0.37

<0.37



<0.38

<0.37

1.50

<0.38



lndeno(l,2,3-c,d)Pyrene

1.1

<0.37

<0.37

<0.4

<0.38

<0.37

0.15 J

<0.38

<0.43

Naphthalene

3.8

<0.37

<0.37

0.096 J

<0.38

0.075 J

<0.38

<0.38

<0.43

Phenanthrene

NE

<0.37

<0.37

<0.4

<0.38

0.220J

0.16 J

<0.38

<0.43

Pyrene

1,800









0.051 J

0.39





PCBs





PCB-1016

4.1

















PCB-1221

0.2

















PCB-1232

0.17

















PCB-1242

0.23

















PCB-1248

0.23

















PCB-1254

0.24

















PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page4of8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-49

ESB-53B

ESB-54

ESB-54

ESB-54 Dup

ESB-56

ESB-56

ESB-57

Depth (feet)

4-5

11-12

0-0.5

3-3.5

3-3.5

0-0.5

2-3

0-0.5

Sample Date

12/07/2006

12/12/2006

01/07/2018

01/18/2007



SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

<0.39

<0.38

<0.37

.070 J

<0.42

<0.37

<0.39



Acenaphthene

3,600

<0.39

<0.38

<0.37

0.320 J

<0.42

0.042 J

<0.39



Acenaphthylene

NE

<0.39

<0.38

<0.37

<0.410

<0.42

<0.370

<0.39 J



Anthracene

18,000

<0.39

<0.19

<0.37

0.460 J

<0.42

<0.370

<0.19 J



Benzo(a)anthracene

1.1

<0.39

<0.38

<0.37 J

1.3 J

<0.42

0.130 J

<0.39 J



Benzo(a)pyrene

0.11

<0.19

<0.19

<0.19 J

1.6 J

0.044 J

0.130 J

<0.19 J



Benzo(b)fluoranthene

1.1

0.039 J

<0.38

<0.37 J

1.4 J

<0.42

0.110 J

<0.39 J



Benzo(g,h,i)perylene

NE

<0.39

<0.38

<0.37 J

1.0 J

<0.42

0.061 J

<0.39



Benzo(k)fluoranthene

11

0.046 J

<0.38

<0.37 J

1.3 J

<0.42

0.130 J

<0.39



bis(2-chloroisopropyl) ether

NE

<0.39











<0.39 J



bis(2-ethylhexyl) phthalate

39

<0.39











<0.39



Carbazole

NE

0.048 J











<0.39 J



Chrysene

110

<0.19

<0.19

<0.19

1.3 J

<0.21

0.130 J

<0.39 J



Dibenz(a,h)Anthracene

0.11

<0.19

<0.19

<0.19

0.310 J

<0.21



<0.39 J



Dibenzofuran

73

0.075 J











<0.39



Di-n-butyl phthalate

NE

<0.39











<0.39



Fluoranthene

2,400

<0.39





2.3 J

0.066 J

0.270 J

<0.39



Fluorene

2,400

<0.39

<0.38

<0.37

0.240 J

<0.42

<0.370

<0.39 J



Hexachloroethane

1.8

<0.39











<0.39



lndeno(l,2,3-c,d)Pyrene

1.1

<0.39

<0.38

<0.37

0.930 J

<0.42 J

0.060 J

<0.39



Naphthalene

3.8

<0.39

<0.38

<0.37

0.240 J

0.042 J

<0.370

<0.39



Phenanthrene

NE

0.043 J

<0.38

<0.37

1.7 J

0.080 J

0.140 J

<0.39 J



Pyrene

1,800

0.074 J





2.0 J



0.260 J





PCBs





PCB-1016

4.1

















PCB-1221

0.2















<0.029

PCB-1232

0.17















<0.029

PCB-1242

0.23















<0.029

PCB-1248

0.23















<0.029

PCB-1254

0.24















<0.029

PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page5of8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-58

ESB-58 DUP

ESB-94

ESB-95 MS/MSD

ESB-96

ESB-97

ESB-100

ESB-101

Depth (feet)

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

Sample Date

08/07/2007

10/21/2013

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240





<0.039

0.260

<0.0037

<0.0041

0.06

0.140

Acenaphthene

3,600





0.120

0.980

<0.0037

<0.0041

0.43

0.540

Acenaphthylene

NE





<0.039

0.039

<0.0037

<0.0041

0.056

<0.040

Anthracene

18,000





0.250

1.8

<0.0037

0.0073

1.1

0.990

Benzo(a)anthracene

1.1





0.820

3.6

0.0086

0.028

2.8

2.0

Benzo(a)pyrene

0.11





0.600

2.5

0.0086

0.027

1.8

1.5

Benzo(b)fluoranthene

1.1





0.750

1.7

0.012

0.036

1.7

1.6

Benzo(g,h,i)perylene

NE





0.430

1.3

0.0064

0.016

1.2

1.2

Benzo(k)fluoranthene

11





0.380

1.7

0.0082

0.028

1.4

1.1

bis(2-chloroisopropyl) ether

NE

















bis(2-ethylhexyl) phthalate

39

















Carbazole

NE

















Chrysene

110





0.690

3.1

0.0097

0.031

2.4

1.8

Dibenz(a,h)Anthracene

0.11





0.170

0.610

<0.0037

0.0073

0.54

0.460

Dibenzofuran

73

















Di-n-butyl phthalate

NE

















Fluoranthene

2,400





1.7

8.0

0.014

0.046

6.5

5.400

Fluorene

2,400





0.120

0.880

<0.0037

<0.0041

0.51

0.630

Hexachloroethane

1.8

















lndeno(l,2,3-c,d)Pyrene

1.1





0.370

1.3

0.006

0.016

1.1

1.0

Naphthalene

3.8





<0.039

0.980

<0.0037

<0.0041

0.2

0.550

Phenanthrene

NE





1.0

7.6

0.0041

0.018

4.8

4.7

Pyrene

1,800





1.1

6.0

0.012

0.045

5.2

4.8

PCBs





PCB-1016

4.1

















PCB-1221

0.2

<0.028

<0.028













PCB-1232

0.17

<0.028

<0.028













PCB-1242

0.23

<0.028

<0.028













PCB-1248

0.23

<0.028

<0.028













PCB-1254

0.24

<0.028

<0.028













PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page6of8

Sample Identification

USEPA Region 3
Residential RSLs

ESB-102

USB-14

USB-14

USB-15

USB-15

USB-16

USB-16

USB-17

Depth (feet)

0-0.5

0-1

4-5

0-1

4-5

0-1

4-5

0-1

Sample Date

10/23/2013

09/13/2013

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

0.400

<0.006

<0.006

<0.005

0.092

<0.005

<0.006

<0.005

Acenaphthene

3,600

0.400

<0.006

<0.006

<0.005

<0.005

<0.005

<0.006

<0.005

Acenaphthylene

NE

0.400

<0.006

<0.006

<0.005

<0.005

<0.005

<0.006

<0.005

Anthracene

18,000

0.400

<0.006

<0.006

<0.005

<0.005

<0.005

<0.006

<0.005

Benzo(a)anthracene

1.1

0.880

0.009

0.033

0.007

0.012

0.006

<0.006

0.005

Benzo(a)pyrene

0.11

0.640

0.008

0.037

0.006

0.013

0.005

<0.006

<0.005

Benzo(b)fluoranthene

1.1

0.800

0.018

0.083

0.015

0.03

0.011

<0.006

0.008

Benzo(g,h,i)perylene

NE

0.480

0.009

0.049

0.006

0.03

<0.005

<0.006

<0.005

Benzo(k)fluoranthene

11

0.440

0.008

0.028

0.007

0.007

<0.005

<0.006

<0.005

bis(2-chloroisopropyl) ether

NE

















bis(2-ethylhexyl) phthalate

39

















Carbazole

NE

















Chrysene

110

0.760

0.011

0.042

0.008

0.025

0.006

<0.006

0.005

Dibenz(a,h)Anthracene

0.11

0.400

<0.006

0.013

<0.005

0.005

<0.005

<0.006

<0.005

Dibenzofuran

73

















Di-n-butyl phthalate

NE

















Fluoranthene

2,400

1.9

0.024

0.044

0.015

0.018

0.012

<0.006

0.011

Fluorene

2,400

0.400

<0.006

<0.006

<0.005

<0.005

<0.005

<0.006

<0.005

Hexachloroethane

1.8

















lndeno(l,2,3-c,d)Pyrene

1.1

0.400

0.008

0.040

0.005

0.016

<0.005

<0.006

<0.005

Naphthalene

3.8

0.400

<0.006

<0.006

<0.005

0.059

<0.005

<0.006

<0.005

Phenanthrene

NE

0.960

0.015

0.020

0.007

0.051

0.007

<0.006

<0.005

Pyrene

1,800

1.4

0.021

0.039

0.015

0.023

0.012



0.011

PCBs





PCB-1016

4.1

















PCB-1221

0.2

















PCB-1232

0.17

















PCB-1242

0.23

















PCB-1248

0.23

















PCB-1254

0.24

















PCB-1260

0.24

-------
Table 3B	Yard 56

SVOC and PCB Soil Characterization Summary	Baltimore aty Maryland

GTA Project No. 140080

Pre-2014 Sampling	page7of8

Sample Identification

USEPA Region 3
Residential RSLs

USB-17

USB-18

USB-18

USB-19

USB-19

USB-20

USB-20

USB-21

Depth (feet)

4-5

0-1

4-5

0-1

4-5

0-1

4-5

0-1

Sample Date

09/13/2013

SVOCs

(mg/kg)



1-1-Biphenyl

NE

















2-Methylnaphthalene

240

0.028

0.016

0.025

0.056

0.010

<0.005

0.010

0.024

Acenaphthene

3,600

0.015

<0.006

0.025

0.056

<0.006

<0.005

0.010

0.024

Acenaphthylene

NE

0.150

0.006

0.011

0.025

<0.006

<0.005

0.010

0.007

Anthracene

18,000

0.120

0.015

0.084

0.2

0.013

<0.005

0.026

0.083

Benzo(a)anthracene

1.1

0.420

0.070

0.260

0.600

0.049

0.007

0.100

0.260

Benzo(a)pyrene

0.11

0.410

0.070

0.260

0.640

0.065

0.007

0.010

0.250

Benzo(b)fluoranthene

1.1

0.660

0.140

0.390

1.100

0.120

0.012

0.020

0.390

Benzo(g,h,i)perylene

NE

0.190

0.058

0.120

0.240

0.075

0.005

0.038

0.100

Benzo(k)fluoranthene

11

0.210

0.043

0.120

0.370

0.040

<0.005

0.063

0.130

bis(2-chloroisopropyl) ether

NE

















bis(2-ethylhexyl) phthalate

39

















Carbazole

NE

















Chrysene

110

0.43

0.091

0.3

0.67

0.086

0.008

0.170

0.26

Dibenz(a,h)Anthracene

0.11

0.054

0.015

0.034

0.07

0.016

<0.005

0.012

0.032

Dibenzofuran

73

















Di-n-butyl phthalate

NE



0.15

0.61

1.30

0.11

0.013

0.270

0.60

Fluoranthene

2,400

0.98

<0.006

0.029

0.065

0.006

<0.005

0.011

0.024

Fluorene

2,400

0.18















Hexachloroethane

1.8



0.051

0.11

0.21

0.055

<0.005

0.038

0.098

lndeno(l,2,3-c,d)Pyrene

1.1

0.18

0.016

0.032

0.17

0.01

<0.005

0.051

0.006

Naphthalene

3.8

0.03

0.012

0.036

0.12

0.012

<0.005

0.056

0.009

Phenanthrene

NE

0.55

0.072

0.45

0.97

0.054

<0.005

0.210

0.34

Pyrene

1,800

0.82

0.15

0.62

1.20

0.11

0.013

0.230

0.54

PCBs





PCB-1016

4.1

















PCB-1221

0.2

















PCB-1232

0.17

















PCB-1242

0.23

















PCB-1248

0.23

















PCB-1254

0.24

















PCB-1260

0.24

-------
Yard 56

Baltimore City Maryland
GTA Project No. 140080
Page 8 of 8

Sample Identification

USEPA Region 3
Residential RSLs

USB-21

USB-22

USB-22

Depth (feet)

4-5

0-1

4-5

Sample Date

09/13/2013

SVOCs

(mg/kg)



1-1-Biphenyl

NE







2-Methylnaphthalene

240

<0.006

<0.005

<0.005

Acenaphthene

3,600

<0.006

<0.005

<0.005

Acenaphthylene

NE

<0.006

<0.005

<0.005

Anthracene

18,000

<0.006

<0.005

<0.005

Benzo(a)anthracene

1.1

0.010

<0.005

<0.005

Benzo(a)pyrene

0.11

0.010

<0.005

<0.005

Benzo(b)fluoranthene

1.1

0.012

<0.005

<0.005

Benzo(g,h,i)perylene

NE

0.006

<0.005

<0.005

Benzo(k)fluoranthene

11

0.080

<0.005

<0.005

bis(2-chloroisopropyl) ether

NE







bis(2-ethylhexyl) phthalate

39







Carbazole

NE







Chrysene

110

0.01

<0.005

<0.005

Dibenz(a,h)Anthracene

0.11

<0.006

<0.005

<0.005

Dibenzofuran

73







Di-n-butyl phthalate

NE

0.023

<0.005

<0.005

Fluoranthene

2,400

<0.006

<0.005

<0.005

Fluorene

2,400







Hexachloroethane

1.8

<0.006

<0.005

<0.005

lndeno(l,2,3-c,d)Pyrene

1.1

<0.006

<0.005

<0.005

Naphthalene

3.8

<0.006

<0.005

<0.005

Phenanthrene

NE

0.017

<0.005

<0.005

Pyrene

1,800

0.022





PCBs





PCB-1016

4.1







PCB-1221

0.2







PCB-1232

0.17







PCB-1242

0.23







PCB-1248

0.23







PCB-1254

0.24







PCB-1260

0.24







Table 3B

SVOC and PCB Soil Characterization Summary
Pre-2014 Sampling

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Pageiof23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-1

GTA-SB-1

GTA-SB-2

GTA-SB-2

GTA-SB-3

GTA-SB-3

GTA-SB-4

GTA-SB-4

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,600

8,800

5,600

7,800

12,000

7,200

11,000

13,000

Antimony

31

<2.3

<2.5

<1.9

3.3

<2.5

<2.4

3.5

<2.3

Arsenic

0.68

2.6

3.7

2.3

3.0

4.8

4.3

5.8

3.7

Barium

15,000

34

40

15

35

35

25

290

49

Beryllium

160

<2.3

<2.5

<1.9

<2.4

<2.5

<2.4

<2.4

<2.3

Cadmium

71

<2.3

<2.5

<1.9

<2.4

<2.5

<2.4

<2.4

<2.3

Calcium

NE

4,100

460

98

640

380

520

11,000

530

Chromium (Total)

NE

28

29

19

20

22

32

19

21

Cobalt

23

68

9.1

4.0

13

6.6

9.7

10

4.0

Copper

3,100

43

26

16

11

20

26

28

16

Iron

55,000

34,000

46,000

24,000

19,000

30,000

53,000

27,000

26,000

Lead

400

13

5.4

6.9

49

34

14

30

15

Magnesium

NE

350

430

170

580

1,000

290

1,000

810

Manganese

NE

49

66

61

49

97

180

92

48

Mercury

11

<0.092

<0.099

<0.077

<0.094

<0.098

<0.095

<0.094

<0.091

Nickel (soluable salts)

1,500

16

22

8.9

11

11

18

12

9.2

Potassium

NE

870

1,100

330

620

840

480

1,200

1,100

Selenium

390

<2.3

<2.5

<1.9

<2.4

<2.5

<2.4

<2.4

<2.3

Silver

390

<2.3

<2.5

<1.9

<2.4

<2.5

<2.4

<2.4

<2.3

Sodium

NE

270

71

140

270

140

70

600

310

Thallium

0.78

<1.8

<2.0

<1.5

<1.9

<2.0

<1.9

<1.9

<1.8

Vanadium

390

46

55

36

25

37

46

37

36

Zinc

23,000

19

32

31

50

110

330

27

19

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page2of23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-5

GTA-SB-5

GTA-SB-6

GTA-SB-6

GTA-SB-7

GTA-SB-7

GTA-SB-8

GTA-SB-8

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

9,400

19,000

6,200

13,000

6,500

10,000

20,000

6,400

Antimony

31

<2.3

<2.7

<2.3

<2.5

<2.3

<3.0

<2.1

<2.2

Arsenic

0.68

3.5

4.8

1.7

5.4

2.0

5.6

4.9

1.9

Barium

15,000

40

66

47

78

32

56

28

66

Beryllium

160

<2.3

<2.7

<2.3

<2.5

<2.3

<3.0

<2.1

<2.2

Cadmium

71

<2.3

<2.7

<2.3

<2.5

<2.3

<3.0

<2.1

<2.2

Calcium

NE

570

680

440

680

410

450

320

220

Chromium (Total)

NE

27

34

14

37

21

35

29

12

Cobalt

23

7.7

7.0

6.0

13

6.5

20

20

4.7

Copper

3,100

25

21

16

29

12

46

14

12

Iron

55,000

41,000

40,000

16,000

50,000

24,000

70,000

33,000

6,700

Lead

400

24

11

15

20

4.3

17

13

4.5

Magnesium

NE

320

910

180

290

290

400

480

200

Manganese

NE

76

60

36

120

22

140

190

30

Mercury

11

<0.091

<0.11

<0.092

<0.10

<0.093

<0.12

<0.085

<0.089

Nickel (soluable salts)

1,500

13

13

14

29

15

49

11

5.9

Potassium

NE

840

1,200

410

650

990

1,200

570

1,200

Selenium

390

<2.3

<2.7

<2.3

<2.5

<2.3

<3.0

<2.1

<2.2

Silver

390

<2.3

<2.7

<2.3

<2.5

<2.3

<3.0

<2.1

<2.2

Sodium

NE

320

390

140

290

<46

85

130

73

Thallium

0.78

<1.8

<2.1

<1.8

<2.0

<1.9

<2.4

<1.7

<1.8

Vanadium

390

53

58

22

57

54

60

36

15

Zinc

23,000

34

28

26

45

24

85

13

14

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page3of23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-9

GTA-SB-9

GTA-SB-10

GTA-SB-10

GTA-SB-11

GTA-SB-11

GTA-SB-12

GTA-SB-12

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,000

5,500

8,400

7,300

14,000

7,800

6,900

4,800

Antimony

31

24

14

<2.2

<2.4

330

22

<2.3

<2.9

Arsenic

0.68

3.2

5.8

12

1.9

13

3.2

3.7

2.8

Barium

15,000

64

72

140

32

790

110

39

28

Beryllium

160

<2.2

<2.1

<2.2

<2.4

<3.0

<2.3

<2.3

<2.9

Cadmium

71

19

19

<2.2

<2.4

65

4.6

<2.3

<2.9

Calcium

NE

6,000

5,200

24,000.00

440

6,000

680

270

65

Chromium (Total)

NE

80

81

24

22

90

20

31

29

Cobalt

23

44

40

43

6.7

190

23

7.8

<2.9

Copper

3,100

53

78

46

19

110

50

20

10

Iron

55,000

32,000

87,000

20,000

20,000

100,000

15,000

42,000

27,000

Lead

400

560

470

190

9.6

5,100

250

11

5.7

Magnesium

NE

470

440

3,500

910

810

380

380

460

Manganese

NE

160

410

110

54

340

42

48

26

Mercury

11

<0.089

<0.082

<0.088

<0.095

<0.12

<0.090

<0.094

<0.12

Nickel (soluable salts)

1,500

41

52

23

11

100

15

16

4.5

Potassium

NE

500

570

790

540

2,500.00

640

640

360

Selenium

390

<2.2

<2.1

<2.2

<2.4

6.9

<2.3

<2.3

<2.9

Silver

390

<2.2

<2.1

<2.2

<2.4

<3.0

<2.3

<2.3

<2.9

Sodium

NE

100

130

560

150

3,800

540

160

100

Thallium

0.78

<1.8

<1.6

<1.8

<1.9

<2.4

<1.8

<1.9

<2.3

Vanadium

390

19

21

38

37

24

27

55

52

Zinc

23,000

140

140

110

27

12,000

550

80



Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page 4 of 23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-13

GTA-SB-13

GTA-SB-14

GTA-SB-14

GTA-SB-15

GTA-SB-15

GTA-SB-16

GTA-SB-16

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

8,500

7,300

10,000

6,100

3,900

6,600

9,600

6,600

Antimony

31

<2.9

<2.4

4.6

<2.4

<3.0

<2.2

<2.8

<2.4

Arsenic

0.68

4.6

2.4

4.7

2.9

3.0

1.9

6.0

0.61

Barium

15,000

59

44

75

32

50

41

34

40

Beryllium

160

<2.9

<2.4

<2.4

<2.4

<3.0

<2.2

3.9

<2.4

Cadmium

71

<2.9

<2.4

<2.4

<2.4

4.9

<2.2

<2.8

<2.4

Calcium

NE

390

<49

820

150

740

770

950

150

Chromium (Total)

NE

34

35

29

37

26

33

52

22

Cobalt

23

13

13

11

5.2

12

11

18

4.7

Copper

3,100

30

25

17

14

44

42

42

6.6

Iron

55,000

46,000

47,000

18,000

52,000

35,000

39,000

110,000

18,000

Lead

400

45

7.2

56

12

190

22

11

2.6

Magnesium

NE

330

260

1700

300

150

170

140

220

Manganese

NE

100

83

83

39

150

72

98

28

Mercury

11

<0.12

<0.097

<0.094

<0.095

<0.12

<0.087

<0.11

<0.097

Nickel (soluable salts)

1,500

22

28

19

7.6

17

21

47

9.0

Potassium

NE

1,300

1,000

1,100

360

560

900

880

1,200

Selenium

390

<2.9

<2.4

<2.4

<2.4

<3.0

<2.2

<2.8

<2.4

Silver

390

<2.9

<2.4

<2.4

<2.4

<3.0

<2.2

<2.8

<2.4

Sodium

NE

260

110

2,500

400

<60

45

<56

<49

Thallium

0.78

<2.4

<1.9

<1.9

<1.9

<2.4

<1.7

<2.2

<1.9

Vanadium

390

40

31

41

64

49

83

150

18

Zinc

23,000

59

51

73

16

77

31

65

16

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page5of23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-17

GTA-SB-17

GTA-SB-18

GTA-SB-18

GTA-SB-19

GTA-SB-19

GTA-SB-20

GTA-SB-20

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

11/19/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,800

11,000

14,000

5,800

5,200

7,300

9,100

10,000

Antimony

31

<3.0

<2.2

19

<2.1

<2.6

<2.5

<2.7

<2.4

Arsenic

0.68

1.1

4.9

10

2.3

0.84

<0.50

1.6

5.6

Barium

15,000

44

36

510

24

35

41

55

61

Beryllium

160

<3.0

2.4

<2.9

<2.1

<2.6

<2.5

<2.7

<2.4

Cadmium

71

<3.0

<2.2

3.8

<2.1

3.9

<2.5

<2.7

<2.4

Calcium

NE

4,400

55

4,900

110

9,100

280

250

100

Chromium (Total)

NE

25

39

40

43

17

20

25

40

Cobalt

23

6.4

14

38

6.1

11

3.4

4.1

7.1

Copper

3,100

14

23

57

15

15

7.5

30

28

Iron

55,000

24,000

85,000

39,000

66,000

25,000

12,000

40,000

60,000

Lead

400

4.9

10

810

4.7

22

8.0

11

6.0

Magnesium

NE

1,700

180

680

89

5,300

190

180

170

Manganese

NE

44

96

130

29

71

31

29

42

Mercury

11

<0.12

<0.090

<0.12

<0.086

<0.11

<0.10

<0.11

<0.098

Nickel (soluable salts)

1,500

12

32

41

15

9.0

5.3

9.9

17

Potassium

NE

1,200

880

1,200

480

550

880

1,200

1,100

Selenium

390

<3.0

<2.2

<2.9

<2.1

<2.6

<2.5

<2.7

<2.4

Silver

390

<3.0

<2.2

4.0

<2.1

<2.6

<2.5

<2.7

<2.4

Sodium

NE

79

68

2,500

83

<53

<50

<55

<49

Thallium

0.78

<2.4

<1.8

<2.3

<1.7

<2.1

<2.0

<2.2

<2.0

Vanadium

390

27

59

35

73

19

15

69

82

Zinc

23,000

18

50

3,900

22

64



20

26

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page 6 of 23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-21

GTA-SB-21

GTA-SB-22

GTA-SB-22

GTA-SB-23

GTA-SB-23

GTA-SB-24

GTA-SB-24

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/19/2014

11/18/2014

11/17/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

8,900

7,500

9,100

4,900

5,800

7,800

7,800

8,600

Antimony

31

<2.7

<2.7

<2.1

<2.6

<2.7

<2.6

<2.2

<2.0

Arsenic

0.68

1.2

0.64

21

4.9

3.5

4.7

2.2

2.9

Barium

15,000

55

44

17

20

29

17

20

31

Beryllium

160

<2.7

<2.7

<2.1

<2.6

<2.7

<2.6

<2.2

<2.0

Cadmium

71

<2.7

<2.7

<2.1

<2.6

<2.7

<2.6

<2.2

<2.0

Calcium

NE

7,400

130

240

130

6,200

490

990

190

Chromium (Total)

NE

20

13

95

57

15

15

17

24

Cobalt

23

6.7

4.5

11

7.8

23

<2.6

3.7

4.5

Copper

3,100

15

12

24

17

32

12

14

19

Iron

55,000

17,000

6,800

90,000

49,000

33,000

12,000

14,000

27,000

Lead

400

14

3.2

8.6

12

27

5.2

110

15

Magnesium

NE

500

240

250

170

2,200

320

990

600

Manganese

NE

42

18

170

190

260

18

39

48

Mercury

11

<0.11

<0.11

<0.085

<0.10

<0.11

<0.11

<0.088

<0.079

Nickel (soluable salts)

1,500

14

6.8

24

18

22

4.2

7.6

9.8

Potassium

NE

1,300

1,500

270

250

520

480

520

570

Selenium

390

<2.7

<2.7

<2.1

<2.6

<2.7

<2.6

<2.2

<2.0

Silver

390

<2.7

<2.7

<2.1

<2.6

<2.7

<2.6

<2.2

<2.0

Sodium

NE

62

<54

<43

<51

<54

75

260

170

Thallium

0.78

<2.1

<2.2

<1.7

<2.0

<2.2

<2.1

<1.8

<1.6

Vanadium

390

26

15

73

62

22

26

25

40

Zinc

23,000

31

15

51

24

48

11

20

16

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page7of23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-25

GTA-SB-25

GTA-SB-26

GTA-SB-26

GTA-SB-27

GTA-SB-27

GTA-SB-28

GTA-SB-28

Depth (feet)

0-2

4-5

0-2

4-5

0-2

4-5

0-2

4-5

Sample Date

11/17/2014

11/18/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,200

6,000

22,000

18,000

12,000

5,400

6,300

8,100

Antimony

31

<2.1

<2.9

<2.9

22

<2.9

<2.4

<2.4

4.7

Arsenic

0.68

2.4

4.8

4.7

27

4.3

0.65

4.4

12

Barium

15,000

48

28

140

990

42

18

83

190

Beryllium

160

<2.1

<2.9

<2.9

<2.6

<2.9

<2.4

<2.4

<2.3

Cadmium

71

<2.1

<2.9

<2.9

150

<2.9

<2.4

6.7

19

Calcium

NE

35,000

360

1300

16,000

950

110

80,000

50,000

Chromium (Total)

NE

15

40

30

96

86

9.8

22

29

Cobalt

23

4.8

<2.9

11

86

15

18

13

34

Copper

3,100

29

24

19

120

34

7.7

22

42

Iron

55,000

13,000

34,000

26,000

19,000

78,000

7,900

18,000

18,000

Lead

400

33

10

63

22,000

17

5.1

850

1,400

Magnesium

NE

2,100

250

2,200

3500

270

99

3,300

5,000

Manganese

NE

150

31

780

210

32

27

92

1,900

Mercury

11

<0.084

<0.11

<0.12

0.33

<0.12

<0.095

0.31

0.23

Nickel (soluable salts)

1,500

8.1

5.9

18

160

31

20

15

32

Potassium

NE

420

520

1100

2,100

620

300

600

990

Selenium

390

<2.1

<2.9

<2.9

4.2

<2.9

<2.4

<2.4

<2.3

Silver

390

<2.1

<2.9

<2.9

<2.6

<2.9

<2.4

<2.4

16

Sodium

NE

87

170

<58

1,800

91

<47

390

260

Thallium

0.78

<1.7

<2.3

<2.3

<2.1

<2.3

<1.9

<1.9

<1.9

Vanadium

390

18

56

41

42

200

19

34

33

Zinc

23,000

57

13

62

1,400

67

37

75

220

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page8of23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-29

GTA-SB-29

GTA-SB-30

GTA-SB-31

GTA-SB-32

GTA-SB-33

GTA-SB-34

GTA-SB-35

Depth (feet)

0-2

4-5

0-2

0-2

0-2

0-2

0-2

0-2

Sample Date

11/18/2014

11/17/2014

11/18/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

4,800

7,100

8,500

5,900

10,000

5,300

8,800

13,000

Antimony

31

<3.0

<3.0

<2.6

<2.0

<2.9

7.6

<2.5

<2.7

Arsenic

0.68

1.1

7.1

<0.53

2.0

5.5

5.5

3.3

3.4

Barium

15,000

46

24

29

33

200

220

62

58

Beryllium

160

<3.0

<3.0

<2.6

<2.0

<2.9

<2.8

<2.5

<2.7

Cadmium

71

<3.0

<3.0

<2.6

<2.0

<2.9

<2.8

<2.5

<2.7

Calcium

NE

490

350

310

280

2,800

9,100

1,700

1,100

Chromium (Total)

NE

39

92

14

22

27

21

15

16

Cobalt

23

<3.0

3.2

4.0

5.9

16

28

3.4

9.1

Copper

3,100

4.0

16

9.8

15

36

55

21

13

Iron

55,000

16,000

71,000

13,000

22,000

23,000

25,000

9,100

17,000

Lead

400

12

14

5.3

14

43

250

41

17

Magnesium

NE

220

150

130

150

610

2,000

610

730

Manganese

NE

12

84

31

40

95

150

84

62

Mercury

11

<0.12

<0.12

<0.11

<0.079

<0.12

0.12

<0.10

<0.11

Nickel (soluable salts)

1,500

<3.0

5.4

4.3

6.5

25

33

8.4

16

Potassium

NE

730

450

560

890

1,100

520

1,300

950

Selenium

390

<3.0

<3.0

<2.6

<2.0

<2.9

<2.8

<2.5

<2.7

Silver

390

<3.0

<3.0

<2.6

<2.0

<2.9

<2.8

<2.5

<2.7

Sodium

NE

<59

<60

86

260

220

140

<50

<53

Thallium

0.78

<2.4

<2.4

<2.1

<1.6

<2.3

<2.2

<2.0

<2.1

Vanadium

390

26

130

12

39

48

20

27

29

Zinc

23,000





12

23

96

350

39

56

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Page 9 of 23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-36

GTA-SB-37

GTA-SB-38

GTA-SB-39

GTA-SB-40

GTA-SB-41

GTA-SB-42

GTA-SB-43

Depth (feet)

0-2

0-2

0-2

0-2

0-2

0-2

0-2

0-2

Sample Date

11/18/2014

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

3,300

3,800

3,400

25,000

5,300

5,200

5,900

6,900

Antimony

31

<2.3

<2.3

<2.3

12

<2.6

<1.9

<2.4

<2.3

Arsenic

0.68

1.6

2.4

1.2

12

2.4

1.8

2.2

2.7

Barium

15,000

14

27

16

250

35

25

38

39

Beryllium

160

<2.3

<2.3

<2.3

<2.7

<2.6

2.7

<2.4

<2.3

Cadmium

71

<2.3

<2.3

<2.3

12

<2.6

<1.9

<2.4

<2.3

Calcium

NE

230

1200

230

8,100

550

740

1,600

1,000

Chromium (Total)

NE

21

24

29

47

27

64

27

37

Cobalt

23

2.4

3.5

2.6

49

6.0

6.1

5.6

5.6

Copper

3,100

8.3

14

12

69

23

21

24

24

Iron

55,000

20,000

34,000

19,000

29,000

31,000

100,000

28,000

33,000

Lead

400

7.5

43

6.3

1,100

9.5

9.4

29

7.9

Magnesium

NE

100

200

120

6,100

250

180

290

420

Manganese

NE

35

45

43

850

50

56

100

63

Mercury

11

<0.093

<0.091

<0.093

<0.11

<0.10

<0.078

<0.097

<0.092

Nickel (soluable salts)

1,500

6.0

6.1

4.8

110

15

13

13

15

Potassium

NE

360

350

400

1,500

900

540

810

940

Selenium

390

<2.3

<2.3

<2.3

<2.7

<2.6

<1.9

<2.4

<2.3

Silver

390

<2.3

<2.3

<2.3

<2.7

<2.6

<1.9

<2.4

<2.3

Sodium

NE

<46

<46

<47

130

130

240

<49

<46

Thallium

0.78

<1.9

<1.8

<1.9

<2.2

<2.0

<1.6

<1.9

<1.8

Vanadium

390

38

42

39

48

43

65

39

55

Zinc

23,000

13

20

12

138

22

22

22

20

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4

Metals Soil Characterization Summary
2014-2017 Sampling

Baltimore Cit
GTA Project

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-44

GTA-SB-45

GTA-SB-DUP 1

GTA-SB-DUP 2

GTA-SB-DUP 3

GTA-SB-DUP 4

GTA-SB-11C

GTA-SB-11C

Depth (feet)

0-2

0-2









0-2

4-5

Sample Date

11/18/2014

07/7/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

5,200

13,000

6,700

5,200

4,800

18,000





Antimony

31

<2.4

<2.5

<2.1

<2.6

<2.1

270





Arsenic

0.68

2.6

4.2

2.9

1.9

9.2

22





Barium

15,000

34

74

20

27

13

1,900





Beryllium

160

<2.4

<2.5

<2.1

<2.6

<2.1

<2.4





Cadmium

71

<2.4

4.4

<2.1

<2.6

<2.1

2,300





Calcium

NE

670

1,500

370

77

160

9,200





Chromium (Total)

NE

20

26

11

32

29

380





Cobalt

23

3.9

12

<2.1

12

4.7

6,200





Copper

3,100

15

18

8.1

5.4

22

440





Iron

55,000

23,000

27,000

14,000

23,000

58,000

33,000





Lead

400

6.3

2,100

5.9

13

7.9

14,000

190

9.5

Magnesium

NE

240

1,100

270

180

110

1,300





Manganese

NE

37

240

13

44

65

460





Mercury

11

<0.095

<0.10

<0.086

<0.10

<0.083

<0.097





Nickel (soluable salts)

1,500

9.6

14

3.1

13

5.5

490





Potassium

NE

730

830

420

1300

310

2,300





Selenium

390

<2.4

<2.5

<2.1

<2.6

<2.1

74





Silver

390

<2.4

<2.5

<2.1

<2.6

<2.1

<2.4





Sodium

NE

<47

64

93

<51

<41

4,600





Thallium

0.78

<1.9

<2.0

<1.7

<2.1

<1.7

<1.9





Vanadium

390

37

39

19

69

47

100





Zinc

23,000

13

48



27

20

16,000





Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page n o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-11C

GTA-SB-11N

GTA-SB-11N

GTA-SB-11N

GTA-SB-11E

GTA-SB-11E

GTA-SB-11E

GTA-SB-11S

Depth (feet)

8-9

0-2

4-5

8-9

0-2

4-5

8-9

0-2

Sample Date

07/7/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

















Antimony

31

















Arsenic

0.68

















Barium

15,000

















Beryllium

160

















Cadmium

71

















Calcium

NE

















Chromium (Total)

NE

















Cobalt

23

















Copper

3,100

















Iron

55,000

















Lead

400

6.1

68

6.4

7.5

12

9.9

7.5

61

Magnesium

NE

















Manganese

NE

















Mercury

11

















Nickel (soluable salts)

1,500

















Potassium

NE

















Selenium

390

















Silver

390

















Sodium

NE

















Thallium

0.78

















Vanadium

390

















Zinc

23,000

















Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page u o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-11S

GTA-SB-11S

GTA-SB-11W

GTA-SB-11W

GTA-SB-11W

GTA-SB-26C

GTA-SB-26C

GTA-SB-26C

Depth (feet)

4-5

8-9

0-2

4-5

8-9

0-2

4-5

8-9

Sample Date

07/7/2017

07/10/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

















Antimony

31

















Arsenic

0.68

















Barium

15,000

















Beryllium

160

















Cadmium

71











<2.4

<2.5

<2.3

Calcium

NE

















Chromium (Total)

NE

















Cobalt

23

















Copper

3,100

















Iron

55,000

















Lead

400

11

6.9

14

9.6

8.3

11

7.4

7.0

Magnesium

NE

















Manganese

NE

















Mercury

11

















Nickel (soluable salts)

1,500

















Potassium

NE

















Selenium

390

















Silver

390

















Sodium

NE

















Thallium

0.78

















Vanadium

390

















Zinc

23,000

















Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page 13 o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-26S

GTA-SB-26S

GTA-SB-26N

GTA-SB-26E

GTA-SB-26E

GTA-SB-26E

GTA-SB-26N

GTA-SB-26N

Depth (feet)

0-2

4-5

8-9

0-2

4-5

8-9

0-2

4-5

Sample Date

07/10/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

















Antimony

31

















Arsenic

0.68

















Barium

15,000

















Beryllium

160

















Cadmium

71

<1.9

<2.1

<2.5

<2.6

<2.3

<2.3

<2.3

<2.3

Calcium

NE

















Chromium (Total)

NE

















Cobalt

23

















Copper

3,100

















Iron

55,000

















Lead

400

10

7.7

3.8

15

7.9

3.3

29

7.0

Magnesium

NE

















Manganese

NE

















Mercury

11

















Nickel (soluable salts)

1,500

















Potassium

NE

















Selenium

390

















Silver

390

















Sodium

NE

















Thallium

0.78

















Vanadium

390

















Zinc

23,000

















Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page u o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-26N

GTA-SB-26W

GTA-SB-26W

GTA-SB-26W

GTA-SB-41C

GTA-SB-41C

GTA-SB-41C

GTA-SB-41N

Depth (feet)

8-9

0-2

4-5

8-9

0-2

4-5

8-9

0-2

Sample Date

07/10/2017

07/7/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

















Antimony

31

















Arsenic

0.68

















Barium

15,000

















Beryllium

160

















Cadmium

71

<2.3

<2.5

<2.4

<2.4

<2.2

<2.3

<2.0

<2.3

Calcium

NE

















Chromium (Total)

NE

















Cobalt

23

















Copper

3,100

















Iron

55,000

















Lead

400

3.8

9.0

4.1

7.9

4.7

14

21

17

Magnesium

NE

















Manganese

NE

















Mercury

11

















Nickel (soluable salts)

1,500

















Potassium

NE

















Selenium

390

















Silver

390

















Sodium

NE

















Thallium

0.78

















Vanadium

390

















Zinc

23,000

















Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page 15 o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-41N

GTA-SB-41N

GTA-SB-41E

GTA-SB-41E

GTA-SB-41E

GTA-SB-41S

GTA-SB-41S

GTA-SB-41S

Depth (feet)

4-5

8-9

0-2

4-5

8-9

0-2

4-5

8-9

Sample Date

07/7/2017

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

















Antimony

31

















Arsenic

0.68

















Barium

15,000

















Beryllium

160

















Cadmium

71

<2.1

<2.2

<2.2

<2.1

<2.5

<2.1

<2.0

<2.3

Calcium

NE

















Chromium (Total)

NE

















Cobalt

23

















Copper

3,100

















Iron

55,000

















Lead

400

15

13

8.9

22

19

4.5

37

17

Magnesium

NE

















Manganese

NE

















Mercury

11

















Nickel (soluable salts)

1,500

















Potassium

NE

















Selenium

390

















Silver

390

















Sodium

NE

















Thallium

0.78

















Vanadium

390

















Zinc

23,000

















Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page 16 o^23

Sample Identification

USEPA Region 3
Residential RSLs

GTA-SB-41W

GTA-SB-41W

GTA-SB-41W

ESB-1

ESB-2

ESB-2

ESB-4

ESB-4

Depth (feet)

0-2

4-5

8-9

0-0.5

0-0.5

4-5

0-0.5

4-5

Sample Date

07/7/2017

12/11/2006

12/13/2006

12/12/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000







6,600 L

5,100

5,900 L

9,600 L

11,000 L

Antimony

31







<2.7>

<2.8 L

<2.3

<2.8 L

<2.8 L

Arsenic

0.68







6.3

0.65 B

5

5.9 J

4.7 J

Barium

15,000







64

29

37 B

41

41

Beryllium

160







<2.7

<2.8

<2.3

<2.8

<2.8

Cadmium

71

<2.3

<2.1

<2.3

<2.7

<2.8

<2.3

<2.8

<2.8

Calcium

NE







1,500

310 L

120 B

590 L

200 L

Chromium (Total)

NE







32

18 J

44

23 J

33 J

Cobalt

23







16

<2.8

7.7 B

4.8

<2.8

Copper

3,100







28

6.2 L

31

42 L

18 L

Iron

55,000







37,000

8,800

51,000

23,000

39,000

Lead

400

3.5

35

14

54

3.4 L

11

20 L

9.6 L

Magnesium

NE







460

160 L

210

840 L

340 L

Manganese

NE







110

15 K

150

44 K

29 K

Mercury

11







<0.11

<0.11

<0.092

<0.11

<0.11

Nickel (soluable salts)

1,500







15

3.6

15 B

9.4

5

Potassium

NE







670

780 K

310 B

940 K

750 K

Selenium

390







<2.7

<2.8

<2.3

<2.8

<2.8

Silver

390

















Sodium

NE







160 B

88 B

66 B

690 L

350 B

Thallium

0.78







<0.54



<0.46





Vanadium

390







42

23 K

68

42 K

61 K

Zinc

23,000







95



26





Other Metals





Lithium

160









2.85

5.25

29

3.89

Strontium

47,000









46.7 K

62.4

20.5 K

40.2 K

Titanium

140,000









20 J

120

93 J

31J

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	Pagel7of23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-5

ESB-6

ESB-7

ESB-8

ESB-8 dup

ESB-10

ESB-13

ESB-16

Depth (feet)

0-0.5

4-5

4-5

5-6

5-6

4-5

4-5

3-4

Sample Date

12/15/2006

12/13/2006

12/7/2006

12/6/2006

12/13/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,200 L

5,000

5,800 L

6,400

5,600

5,500

5,900

7,000 L

Antimony

31

<2.9

<2.8

<2.3 L

<2.9 L

<2.9 L

<3.1 L

<2.7 L

<2.9

Arsenic

0.68

5.5

0.73 B

2.9

4.6

3.2

1.6

2.9

4.8

Barium

15,000

39 B

25 B

23

46 K

45 K

44

45 K

35

Beryllium

160

<2.9

<2.8

<2.3

<2.9

5.3

<3.1

<2.7

<2.9

Cadmium

71

<2.9

<2.8

<2.3

56 K

3.1 K

<3.1

<2.7

<2.9

Calcium

NE

410 B

140 B

700 L

7,600

2,000

590

1,900

5,000 J

Chromium (Total)

NE

78

19

34 J

43

51

27

26

31J

Cobalt

23

9.7 B

2.9 B

9.8

34

29

9.1

9.5

3

Copper

3,100

32

8.6

35 L

41

53

10

19

14 J

Iron

55,000

82,000

7,600

44,000

48,000

39,000

24,000

33,000

16,000

Lead

400

42

<2.8

5 L

190 J

42 J

5.3 J

37 J

21J

Magnesium

NE

200

140

380 L

2,300 J

640 J

220 J

450 J

2,500 J

Manganese

NE

60

34

89 K

200 J

79 J

67 J

87 J

44

Mercury

11

<0.12

<0.11

<0.091

<0.12

<0.12

<0.12

<0.11

<0.12

Nickel (soluable salts)

1,500

23 B

4.4 B

25

75 K

50 K

17 K

21 K

6.4 J

Potassium

NE

410 B

740

790 K

1,300 J

990 J

1,200 J

1,200 J

780

Selenium

390

<2.9

<2.8

<2.3

<2.9

<2.9

<3.1

<2.7

<2.9

Silver

390

















Sodium

NE

<59

<56

51 B

81 B

<58

66 B

120 B

<58

Thallium

0.78

<0.59

<0.56



<0.59

<0.58

<0.62

<0.53

<0.58

Vanadium

390

190

17

96 K

65 J

60 J

22 J

32 J

28

Zinc

23,000

52



41J

82 K

110 K

<31

70 K

--

Other Metals





Lithium

160

2.81

7.32

26.3

14.1

9.51

12.6

10.8

6.5 J

Strontium

47,000

24.4

38.5

38.9 K

83.8

101

81.6

66.8

20.3 J

Titanium

140,000

170

35

110 J

150

110

47

60

94

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page lg o^23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-16 dup

ESB-17

ESB-19

ESB-21

ESB-21

ESB-22

ESB-22

ESB-23

Depth (feet)

3-4

0-0.5

0-0.5

0-0.5

4-5

0-0.5

4-5

0-0.5

Sample Date

12/13/2006

12/8/2006

12/13/2006

12/7/2006

12/12/2006

12/13/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

7,200 L

6,600 L

1,000 K

5,100

6,900

7,300 L

6,900

9,000

Antimony

31

<2.7

<2.5

<2.9 L

<2.7

<2.7

<2.5 L

<2.9 L

<2.6 L

Arsenic

0.68

4

4.8

3.2 J

3

6.5

3.2 J

2.4 J

3.1 J

Barium

15,000

38

41

38

15

24

25

36

28

Beryllium

160

<2.7

<2.5

<2.9

<2.7

<2.7

<2.5

3

<2.6

Cadmium

71

<2.7

<2.5

<2.9

<2.7

<2.7

<2.5

<2.9

<2.6

Calcium

NE

18,000 J

560

920 L

850

1,600

590 L

<58 L

510 L

Chromium (Total)

NE

65 J

16

35 J

23

37

24 J

25 J

22 J

Cobalt

23

3.9

3.9

14

4

3.4

3

11

4

Copper

3,100

23 J

41

22 L

29

17

9.3 L

26 L

14 L

Iron

55,000

19,000

14,000

44,000 K

27,000

21,000

25,000

48,000

14,000

Lead

400

35 J

48

6 L

11

6.4

7.4 L

5.1 L

8.8 L

Magnesium

NE

7,700 J

590

280 L

530

1,100

230 L

160 L

940 L

Manganese

NE

48

62

100 K

45

47

19 K

72 K

57 K

Mercury

11

<0.11

<0.098

<0.11

<0.11

<0.11

<0.10

<0.12

<0.11

Nickel (soluable salts)

1,500

11J

8.8

34

7

8

5.5

21

8.9

Potassium

NE

810

490

1,300 K

280

300

620 K

830 K

1,500 K

Selenium

390

<2.7

<2.5

<2.9

<2.7

<2.7

<2.5

<2.9

<2.6

Silver

390

















Sodium

NE

<54

<49

<57 L

<53

<53

180 B

270 B

600 L

Thallium

0.78

<0.54

<0.49



<0.53

<0.53







Vanadium

390

30

26

58 K

38

36

39 K

34 K

36 K

Zinc

23,000

35

41

58 J





26 K

62 J



Other Metals





Lithium

160

15.7 J

6.9







7.55

2.99

8.95

Strontium

47,000

46.7 J

243







23.3 K

36.5 K

20.8 K

Titanium

140,000

82

90







41J

88 J

190 J

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page ig o^23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-24

ESB-25

ESB-26

ESB-26

ESB-27

ESB-28

ESB-29

ESB-30

Depth (feet)

4-5

4-5

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

0-0.5

Sample Date

12/13/2006

12/12/2006

12/14/2006

12/11/2006

12/14/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

3,400

7,700 L

8,100

8,100

18,000 L

3,800

6,400

16,000 L

Antimony

31

<3.0 L

<2.4 L

<2.7

<2.7

3.6 B

<2.9

<3.1

2.8 B

Arsenic

0.68

5.5 J

4.5 J

3.7

3.7

74

4.4

12

46

Barium

15,000

21

38

41

41

54 B

40

56

27 B

Beryllium

160

<3.0

<2.4

<2.7

<2.7

<2.5

<2.9

<3.1

<2.7

Cadmium

71

<3.0

<2.4

<2.7

<2.7

<2.5

<2.9

3.7

<2.7

Calcium

NE

190 L

380 L

4,600

4,600

1,700

1,700

4,900

1,500

Chromium (Total)

NE

8.4

32 J

35

35

35

22

67

26

Cobalt

23

<3.0

7.7

17

17

78

8.6

18

35

Copper

3,100

74 L

31 L

79

79

15

20

67

13

Iron

55,000

8,400

38,000

37,000

37,000

31,000

11,000

71,000

24,000

Lead

400

63 L

7.6 L

10

10

11

16

45

7.8

Magnesium

NE

180 L

300 L

360

360

730

280

430

600

Manganese

NE

40 K

47 K

130

130

850

50

93

240

Mercury

11

<0.12

<0.095

<0.11

<0.11

<0.10

<0.12

<0.12

<0.11

Nickel (soluable salts)

1,500

<3.0

18

31

31

14 B

11

83

11 B

Potassium

NE

330 K

920 K

670

670

1,100

1,100

920

940

Selenium

390

<3.0

<2.4

<2.7

<2.7

<2.5

<2.9

<3.1

<2.7

Silver

390

















Sodium

NE

86 B

180 B

83 B

83 B

160 B

190 B

190 B

140 B

Thallium

0.78





<0.54

<0.54

<0.5

<0.58

<0.62

<0.54

Vanadium

390

14 K

61 K

61

61

140

41

110

79

Zinc

23,000



31J

120

120





66



Other Metals





Lithium

160

4.33

5.4





98

6.28

7.4

41.9

Strontium

47,000

11.4 K

34.1 K





132

63.9

64.9

99.9

Titanium

140,000

41J

44 J





140

11

240

140

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page 2Q o^23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-31

ESB-32

ESB-32

ESB-33

ESB-33

ESB-34

ESB-34

ESB-44

Depth (feet)

0-0.5

0-0.5

4-5

0-0.5

4-5

0-0.5

4-5

0-0.5

Sample Date

12/11/2006

12/13/2006

12/6/2006

12/13/2006

12/26/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

4,900

7,800 L

6,600 L

8,000

6,100

6,300

1,900

5,200

Antimony

31

8.3

<2.6 L

<2.5 L

<2.9

<2.9

<2.7 L

<2.6 L

<2.8 L

Arsenic

0.68

8.4

5.8 J

2.6 J

4.4

2.1

4.1 J

3.4 J

4.1 J

Barium

15,000

130

25

29

130

37

17

7.5

26 K

Beryllium

160

<2.7

<2.6

<2.5

<2.9

<2.9

<2.7

<2.6

<2.8

Cadmium

71

<2.7

<2.6

<2.5

8.2

<2.9

<2.7

<2.6

<2.8

Calcium

NE

2,000

640 L

<50

9,200

2,700

400 L

170

1,500 J

Chromium (Total)

NE

67

48 J

33 J

33

30

23 J

20 J

23

Cobalt

23

40

6

5.4

22

8.5

6.6

7.6

3.8

Copper

3,100

100

30 L

11 L

27

18

27 L

17 L

27

Iron

55,000

100,000

49,000

29,000

49,000

37,000

32,000

44,000

28,000

Lead

400

380

11 L

6.4 L

320

16

6.1 L

4.6 L

7.1 J

Magnesium

NE

390

220 L

150 L

2,300

610

250 L

170 L

950 K

Manganese

NE

410

82 K

19 K

210

52

150 K

310 K

41

Mercury

11

<0.11

<0.10

<0.10

0.39

<0.12

<0.11

<0.10

<0.11

Nickel (soluable salts)

1,500

56

12

8.3

37

18

14

12

8.4

Potassium

NE

510

390 K

540 K

1,500

1,400

400 K

130 K

650 K

Selenium

390

<2.7

<2.6

<2.5

<2.9

<2.9

<2.7

<2.6

<2.8

Silver

390

















Sodium

NE

150 B

79 B

54 B

320 B

110 B

<55 L

<51 L

190 B

Thallium

0.78

<0.55





<0.58

<0.58





<0.56

Vanadium

390

50

65 K

74 K

44

36

54 K

39 K

44

Zinc

23,000

820

<26



150

40







Other Metals





Lithium

160

11.9

3.48

1.6





2.15

0.83

6.25

Strontium

47,000

62.9

26.6 K

27.3 K





15.4 K

9.76 K

34.4

Titanium

140,000

74

110 J

23 J





96 J

170 J

66 K

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page n o^23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-44

ESB-44 Dup

ESB-45

ESB-46

ESB-49

ESB-49

ESB-50

ESB-51

Depth (feet)

4-5

4-5

0-0.5

0-0.5

0-0.5

4-5

0-0.5

0-0.5

Sample Date

12/26/2006

12/11/2006

12/7/2006

12/8/2006

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

5,400

5,000

14,000 L

16,000 L

10,000

6,700

5,300

2,900

Antimony

31

<2.7 L

<2.6 L

62

12

<3.2

<2.5

<3

<2.7

Arsenic

0.68

3.9 J

3.8 J

9.2

2.1

7.1

6.2

4.3

2.3

Barium

15,000

22 K

29 K

570

150

51

110

27

26

Beryllium

160

<2.7

<2.6

<2.6

<2.8

<3.2

<2.5

<3

<2.7

Cadmium

71

<2.7

<2.6

18

<2.8

<3.2

2.6

<3

<2.7

Calcium

NE

6,900 J

1,200 J

5,800

4,800

1,100

820

350

250

Chromium (Total)

NE

25

22

58

24

32

22

33

15

Cobalt

23

3.8

4.6

95

12

18

9.5

9.8

4.1

Copper

3,100

22

24

100

14

44

71

33

13

Iron

55,000

27,000

25,000

45,000

11,000

31,000

20,000

52,000

12,000

Lead

400

14 J

7.2 J

1,300

94

60

99

31

260

Magnesium

NE

3,300 K

880 K

1,200

10,000

990

650

200

120

Manganese

NE

46

44

200

250

150

87

110

26

Mercury

11

<0.11

<0.11

<0.10

<0.11

<0.13

<0.10

<0.12

<0.11

Nickel (soluable salts)

1,500

7.2

12

94

17

26

19

19

8.6

Potassium

NE

430 K

680 K

1,400

1,100

690

530

600

300

Selenium

390

<2.7

<2.6

<2.6

<2.8

<3.2

<2.5

<3

<2.7

Silver

390

















Sodium

NE

170 B

190 B

860

1,900

95 B

56 B

<60

<54

Thallium

0.78

<0.53

<0.53

<0.51

<0.55

<0.63

<0.5

<0.6

<0.54

Vanadium

390

49

41

59

34

49

30

76

22

Zinc

23,000

28

27

1,700

210

76

70

44

28

Other Metals





Lithium

160

4.16

5.85

18.2

60.5

14.2

11.7

6.3

3.48

Strontium

47,000

29.9

34.6

117

38.6

30.3

19.4

36.8

11

Titanium

140,000

71 K

61 K

150

540

110

88

98

48

Cyanide (Total)

NE

















TCLP lead

NE

-------
Table 4	Yard 56

Metals Soil Characterization Summary	Baltimore city Maryland

GTA Project No. 140080

2014-2017 Sampling	page 22 o^23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-54

ESB-54

ESB-54 Dup

ESB-56

ESB-56

ESB-67

ESB-68

ESB-69

Depth (feet)

0-0.5

3-3.5

3-3.5

0-0.5

2-3

0-0.5

0-0.5

0-0.5

Sample Date

1/18/2007

8/15/2007

Target Analyte List Metals

(mg/kg)



Aluminum

77,000

5,700 K

8,100 K

6,200 K

19,000 K

4,300 K







Antimony

31

<2.5 L

<2.4 L

<3

<2.5 L

<2.2 L

26.6 L

7.89 L

387 L

Arsenic

0.68

3.2 L

7.5 L

1.7 L

7.1 L

3.3 L

4.87 J

4.68 J

13.6 J

Barium

15,000

34 J

130 J

48 J

220 J

66 J







Beryllium

160

<2.5

<2.4

<3

<2.5

<2.2

<2.35

<2.87

<2.80

Cadmium

71

<2.5

11J

<3

4.7 J

<2.2

4.09 J

<2.87

50 J

Calcium

NE

810J

2,300 J

1,200 J

4,600 J

750 J







Chromium (Total)

NE

21J

34 J

34 J

29 J

12 J

34.2 L

47.7 L

1,640 L

Cobalt

23

4.1 K

12 K

5.3 K

13 K

26 K







Copper

3,100

17 J

92 J

19 J

38 J

31J

43.3 J

37.1 J

129 J

Iron

55,000

24,000

30,000

43,000

29,000

14,000







Lead

400

33 J

210 J

10 J

350 J

62 K

481

137

811

Magnesium

NE

420 J

790 J

290 J

3,000 J

<450







Manganese

NE

59 J

170 J

26 J

520 J

42







Mercury

11

<0.099

0.18

<0.12

<0.10

<0.09

<0.094

<0.115

<0.112

Nickel (soluable salts)

1,500

9.4 K

24 K

12 K

22 K

9.9 K

31.9 B

11.6 B

92.5 L

Potassium

NE

390 J

570 J

880 J

1,000 J

310 J







Selenium

390

<2.5

<2.4

<3

<2.5

<2.2

<2.35

<2.87

5.81

Silver

390

















Sodium

NE

89 L

110 L

<60 L

180 L

56 L







Thallium

0.78

<0.49

<0.48

<0.6

<0.5

<0.45

<1.88

<2.30

<2.23

Vanadium

390

33

51

42

31

22







Zinc

23,000





34

320

280

865 J

91.9 J

6,360 J

Other Metals





Lithium

160

















Strontium

47,000

















Titanium

140,000

















Cyanide (Total)

NE

















TCLP lead

NE

-------
Yard 56

Baltimore City Maryland
GTA Project No. 140080
Page 23 of 23

Sample Identification

USEPA Region 3
Residential RSLs

ESB-69 Dup

ESB-70

ESB-71

USB-23

Depth (feet)

0-0.5

0-0.5

0-0.5

Unknown

Sample Date

8/15/2007

8/15/2007

8/15/2007



Target Analyte List Metals

(mg/kg)



Aluminum

77,000









Antimony

31

105 L

2.35 B

<2.38



Arsenic

0.68

27.8 J

2.8 J

3.13 J



Barium

15,000









Beryllium

160

<2.79

<2.79

<2.38



Cadmium

71

20.8 J

<2.79

<2.38



Calcium

NE









Chromium (Total)

NE

688 L

28.5 L

20.9



Cobalt

23









Copper

3,100

157 J

14.6 J

20.6



Iron

55,000









Lead

400

602

39.3

15.6

2,900

Magnesium

NE









Manganese

NE









Mercury

11

<0.112

<0.112

<0.095



Nickel (soluable salts)

1,500

84.1 L

7.58 B

8.75 B



Potassium

NE









Selenium

390

2.37 J

<2.79

<2.38



Silver

390









Sodium

NE









Thallium

0.78

<2.23

<2.23

<1.9



Vanadium

390









Zinc

23,000

15,300 J

65.5 J

83.2 J



Other Metals





Lithium

160









Strontium

47,000









Titanium

140,000









Cyanide (Total)

NE









TCLP lead

NE









Table 4

Metals Soil Characterization Summary
2014-2017 Sampling

-------
Table 5	Yard56

SVOC Groundwater Characterization Summary

GTA Project No. 140080

Baltimore City, Maryland
No. 140080
Page 1 of 1

Sample Identification

Comparison Value

GTA-MW-1

GTA-MW-2

GTA-MW-3

GTA-MW-4

GTA-MW-5

EGW-9D

EGW-10

EGW-12

Sample Date

MCL
(RSL as noted)

1/14/2015

3/15/2018

1/14/2015

3/14/2018

1/14/2015

3/15/2018

1/14/2015

3/15/2018

1/13/2015

3/14/2018

1/14/2015

1/13/2015

3/14/2018

1/13/2015

3/15/2018

SVOCs

("g/L)



2,4,5-Trichlorophenol

1,200*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6



<5.0

<5.0



<5.6

<2.5**

2,4,6-Trichlorophenol

4.1*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2,4-Dichlorophenol

46*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2,4-Dimethylphenol

360*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2,4-Dinitrophenol

39*

<10

<5.0**

<12

<5.0**

<10

<5.0**

<10

<5.0**

<11

<5.6**

<10

<10

<5.6**

<11

<5.0**

2,4-Dinitrotoluene

0.24*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2,6-Dinitrotoluene

0.049*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2-Chloronaphthalene

750*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2-Chlorophenol

91*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2-Methyl phenol

930*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

8.3

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2-Methylnaphthalene

36*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

2-Nitroaniline

190*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

2-Nitrophenol

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

3&4-Methyl phenol

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

3,3-Dichlorobenzidine

0.13*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

3-Nitroaniline

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

4,6-Dinitro-2-methyl phenol

1.5*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

4-Bromophenylphenyl ether

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

4-Chloro-3-methyl phenol

1,400*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

4-Chloroaniline

0.37*

<5.0

<5.0**

<5.9

<5.0**

<5.0

<5.0**

<5.0

<5.0**

<5.6

<5.6**

<5.0

<5.0

<5.6**

<5.6

<5.0**

4-Chlorophenyl Phenyl ether

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

4-Nitroaniline

UJ
bo

<5.0

<5.0**

<5.9

<5.0**

<5.0

<5.0**

<5.0

<5.0**

<5.6

<5.6**

<5.0

<5.0

<5.6**

<5.6

<5.0**

4-Nitrophenol

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Acenaphthene

530*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Acenaphthylene

NE

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Acetophenone

1,900*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Anthracene

1,800*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Atrazine

3.0

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Benzo(a)anthracene

0.003*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Benzo(a)pyrene

0.2*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Benzo(b)fluoranthene

0.25*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Benzo(g,h,i)perylene

NE

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Benzo(k)fluoranthene

2.5*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Biphenyl (Diphenyl)

0.83*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Butyl benzyl phthalate

16*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Caprolactam

9,900*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Carbazole

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Chrysene

25*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Di-n-butyl phthalate

90*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Di-n-octyl phthalate

NE

<5.0

<5.0**

<5.9

<5.0**

<5.0

<5.0**

<5.0

<5.0**

<5.6

<5.6**

<5.0

<5.0

<5.6**

<5.6

<5.0**

Dibenz(a,h)Anthracene

0.025*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56

<5.0

<5.0

<0.56

<5.6

<0.50**

Dibenzofuran

7.9*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Diethyl phthalate

15,000*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Dimethyl phthalate

NE

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Fiuoranthene

800*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Fiuorene

290*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Hexachlorobenzene

1

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Hexachlorobutadiene

0.14*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Hexachlorocyclopentadiene

50

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Hexac h 1 oroetha ne

0.33*

<5.0

<2.5**

<5.9

<2.5**

11

<2.5**

<5.0

<2.5**

670

<2.8**

<5.0

28

<2.8**

<5.6

<2.5**

lndeno(l,2,3-c,d)Pyrene

0.25*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Isophorone

78*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

N-Nitrosodi-n-propyl amine

0.011*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

N-Nitrosodiphenylamine

12*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Naphthalene

0.17*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

13

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Nitrobenzene

0.14*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Pentachlorophenol

1

<5.0

<5.0**

<5.9

<5.0**

<5.0

<5.0**

<5.0

<5.0**

<5.6

<5.6**

<5.0

<5.0

<5.6**

<5.6

<5.0**

Phenanthrene

NE

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Phenol

5,800*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

Pyrene

120*

<5.0

<0.50**

<5.9

<0.50**

<5.0

<0.50**

<5.0

<0.50**

<5.6

<0.56**

<5.0

<5.0

<0.56**

<5.6

<0.50**

Pyridine

20

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

bis(2-chloroethoxy) methane

59*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

bis(2-chloroethyl) ether

0.014*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

bis(2-chloroisopropyl) ether

0.014*

<5.0

<2.5**

<5.9

<2.5**

<5.0

<2.5**

<5.0

<2.5**

<5.6

<2.8**

<5.0

<5.0

<2.8**

<5.6

<2.5**

bis(2-ethylhexyl) phthalate

6













9.5

-------
Yard 56

Baltimore City, Maryland
GTA Project No. 140080
Page 1 of 2

Sample Identification

Comparison Values

GTA-MW-1

GTA-MW-2

GTA-MW-3

GTA-MW-4

GTA-MW-5 (EGW-10D)

Sample Date

MCL
(RSL as noted)

1/14/2015

3/15/2018

1/14/2015

3/14/2018

1/14/2015

3/15/2018

1/14/2015

3/15/2018

12/2009

1/15/2015

3/14/2018

VOCs

(ug/L)



1,1,1-Trichloroethane

200

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,1,2,2-Tetrachloroethane

0.076*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



1.5

<1.0

1,1,2-Trichloroethane

5

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

1.3

1,1,2-Trichlorotrifluoroethane

10,000*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



2.9

<1.0

1,1-Dichloroethane

2.8*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,1-Dichloroethene

7

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

14

10

1,2,3-Trichlorobenzene

7*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,2,4-Trichlorobenzene

70

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

l,2-Dibromo-3-chloropropane

0.2

<10

<5.0

<10

<5.0

<10

<5.0

<10

<5.0



<10

<5.0

1,2-Dibromoethane

0.05

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,2-Dichlorobenzene

600

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,2-Dichloroethane

5

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



2.8

1.1

1,2-Dichloropropane

5

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,3-Dichlorobenzene

NE

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

1,4-Dichlorobenzene

75

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

2-Butanone (MEK)

5,600*

<10

<10

<10

<10

<10

<10

<10

<10

< 10

<10

<10

2-Hexanone (MBK)

38

<10

<5.0

<10

<5.0

<10

<5.0

<10

<5.0



<10

<5.0

4-Methyl-2-Pentanone (MIBK)

6,300*

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0



<5.0

<5.0

Acetone

14,000*

<10

<10

<10

<10

<10

<10

<10

<10

23 L

<10

<10

Benzene

5

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



4.0

2.1

Bromochloromethane

*

CO

00

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Bromodichloromethane

80

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

3

<1.0

<1.0

Bromoform

80

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0



<5.0

<5.0

Bromomethane

7.5*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Carbon Disulfide

810*

<10

<10

<10

<10

<10

<10

<10

<10



<10

<10

Carbon tetrachloride

5

<1.0

<1.0

290

410

79

110

11

5.4

<1.0

29

26

Chlorobenzene

100

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Chloroethane

21,000*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Chloroform

80

1.3

<1.0

190

380

9.4

6.3

2.0

1.0

22

15

8.4

Chloromethane

192*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Cyclohexane

13,000*

<10

<10

<10

<10

<10

<10

<10

<10



<10

<10

Dibromochloromethane

80

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Dichlorodifluoromethane

200*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Ethylbenzene

700

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Isopropylbenzene

450*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Methyl Acetate

20,000*

<10

<10

<10

<10

<10

<10

<10

<10



<10

<10

Methyl-t-Butyl Ether

14*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Methylcyclohexane

NE

<10

<10

<10

<10

<10

<10

<10

<10



<10

<10

Methylene chloride

5

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



4.2

0.58 J

Naphthalene

0.17*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



29

<1.0

Styrene

100

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

Tetrachloroethene

5

24

<1.0

360

720

120

12

32

<1.0

4

28,000

2,800

Toluene

1,000

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



1.4

<1.0

Trichloroethene

5

1.3

<1.0

89

170

5.7

<1.0

2.0

<1.0

<1.0

3,400

1,500

Trichlorofluoromethane

5,200*

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0

<5.0



<5.0

<5.0

Vinyl Chloride

2

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

38

0.67J

cis-l,2-Dichloroethene

70

1.6

<1.0

18

35

9.4

<1.0

2.3

<1.0



12,000

4,700

cis-l,3-Dichloropropene

0.47*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



<1.0

<1.0

m&p-Xylene

190*

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0



2.5

<2.0

o-Xylene

190*

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0



1.9

<1.0

trans-l,2-Dichloroethene

100

<1.0

<1.0

5.0

9.7

<1.0

<1.0

<1.0

<1.0

<1.0

310

180

trans-l,3-Dichloropropene

0.47*























Table 6

VOC Groundwater Characterization Summary

-------
Yard 56

Baltimore City, Maryland
GTA Project No. 140080
Page 2 of 2

Sample Identification

Comparison Values

EGW-9D

EGW-10

EGW-11

EGW-12

Sample Date

MCL
(RSLas noted)

01/2009

1/14/2015

09/2009

10/2009

1/13/2015

3/14/2018

01/2010

02/21/2013

1/13/2015

3/15/2018

VOCs

(ug/L)





1,1,1-Trichloroethane

200



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,1,2,2-Tetrachloroethane

0.076*



<1.0





1.4

<10



<1.0

<1.0

<1.0

1,1,2-Trichloroethane

5



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,1,2-Trichlorotrifluoroethane

10,000*



<1.0





4.2

<10



<1.0

<1.0

<1.0

1,1-Dichloroethane

2.8*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,1-Dichloroethene

7

<1.0

<1.0

2

3

12

13

<1.0

<1.0

<1.0

<1.0

1,2,3-Trichlorobenzene

7*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,2,4-Trichlorobenzene

70



<1.0





<1.0

<10



<1.0

<1.0

<1.0

l,2-Dibromo-3-chloropropane

0.2



<10





<10

<50



<10

<10

<5.0

1,2-Dibromoethane

0.05



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,2-Dichlorobenzene

600



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,2-Dichloroethane

5



<1.0





2.6

<10



<1.0

<1.0

<1.0

1,2-Dichloropropane

5



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,3-Dichlorobenzene

NE



<1.0





<1.0

<10



<1.0

<1.0

<1.0

1,4-Dichlorobenzene

75



<1.0





<1.0

<10



<1.0

<1.0

<1.0

2-Butanone (MEK)

5,600*

< 10 UL

<10

< 10 UL

< 10 UL

<10

<100

< 10

<10

<10

<10

2-Hexanone (MBK)

38



<10





<10

<50



<10

<10

<5.0

4-Methyl-2-Pentanone (MIBK)

6,300*



<5.0





<5.0

<50



<5.0

<5.0

<5.0

Acetone

14,000*

< 10 UL

<10

< 10 UL

< 10 UL

<10

<100

< 10

<10

<10

<10

Benzene

5



<1.0





3.7

<10



<1.0

<1.0

<1.0

Bromochloromethane

*

CO

00



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Bromodichloromethane

80

<1.0

<1.0

<1.0

<1.0

<1.0

<10

<1.0

<1.0

<1.0

<1.0

Bromoform

80



<5.0





<5.0

<50



<5.0

<5.0

<5.0

Bromomethane

7.5*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Carbon Disulfide

810*



<10





<10

<100



<10

<10

<10

Carbon tetrachloride

5

<1.0

<1.0

21

26

41

33

<1.0

7.7

10

6.8

Chlorobenzene

100



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Chloroethane

21,000*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Chloroform

80

<1.0

<1.0

9

8

10

11

<1.0

<1.0

3.5

2.1

Chloromethane

192*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Cyclohexane

13,000*



<10





<10

<100



<10

<10

<10

Dibromochloromethane

80



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Dichlorodifluoromethane

200*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Ethylbenzene

700



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Isopropylbenzene

450*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Methyl Acetate

20,000*



<10





<10

<100



<10

<10

<10

Methyl-t-Butyl Ether

14*



<1.0





<1.0

<10



<10

<1.0

<1.0

Methylcyclohexane

NE



<10





<10

<100



<1.0

<10

<10

Methylene chloride

5



<1.0





1.6

<10



<1.0

<1.0

<1.0

Naphthalene

0.17*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Styrene

100



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Tetrachloroethene

5

1

1.1

970

970

5,400

5,100

<1.0

12

14

7.8

Toluene

1,000



<1.0





<1.0

<10



<1.0

<1.0

<1.0

Trichloroethene

5

<1.0

<1.0

270

360

2,800

3,200

<1.0

<1.0

<1.0

<1.0

Trichlorofluoromethane

5,200*



<5.0





<5.0

<50



<5.0

<5.0

<5.0

Vinyl Chloride

2

<1.0

<1.0

0.6 J

<1.0

4.7

<10

<1.0

<1.0

<1.0

<1.0

cis-l,2-Dichloroethene

70

< 10

<1.0

570

660

11,000

13,000

< 10

<1.0

<1.0

<1.0

cis-l,3-Dichloropropene

0.47*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

m&p-Xylene

190*



<2.0





<2.0

<20



<2.0

<2.0

<2.0

o-Xylene

190*



<1.0





<1.0

<10



<1.0

<1.0

<1.0

trans-l,2-Dichloroethene

100

<1.0

<1.0

40

45

290

310

<1.0

<1.0

<1.0

<1.0

trans-l,3-Dichloropropene

0.47*





















Table 6

VOC Groundwater Characterization Summary

-------
Table 7	Yard 56

Metals Groundwater Characterization Summary	Baltimore City, Maryland

GTA Project No. 140080

Page 1 of 3

Sample Identification

Comparison Value

GTA-MW-1

GTA-MW-2

GTA-MW-3

Total

Dissolved

Total

Disolved

Total

Dissolved

Total

Disolved

Total

Dissolved

Sample Date

MCL
(RSL as noted)

1/14/2015

1/29/2015

3/15/2018

1/14/2015

1/29/2015

3/14/2018

1/14/2015

1/29/2015

Target Analyte List Metals

ug/L



Aluminum

20,000*

180

<100

530

<50**

210

<100

370

<1,000**

1,100

140

Antimony

6

<5.0

<5.0

<2.5**

<2.5**

<5.0

<5.0

<2.5**

<50**

<5.0

<5.0

Arsenic

10

<1.0

<1.0

3.3

<0.5**

<1.0

<1.0

1.0

<10**

<1.0

<1.0

Barium

2,000

69

67

38

30

84

73

69

65

96

100

Beryllium

4

<1.0

<1.0

<0.5**

<0.5**

<1.0

<1.0

0.90 J

<10**

2.1

2.3

Cadmium

5

<1.0

<1.0

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

Calcium

NE

48,000

63,000

67,000

59,000

33,000

19,000

14,000

13,000

11,000

9,500

Total Chromium

100

78

1.1

5.8

<0.5

76

2.1

7.0

<20**

340

5.0

Cobalt

6*

73

65

43

39

20

20

12

12 J

43

42

Copper

1,300

7.7

<1.0

7.8

1.5

6.4

<1.0

4.5

<10**

19

3.5

Iron

14,000*

1,400

250

4,300

110

1,100

430

1,600

<1,000**

8,300

300

Lead

15

<1.0

<1.0

4.2

<0.5**

1.1

<1.0

2.1

<10**

4.7

<1.0

Magnesium

NE

27,000

30,000

23,000

29,000

16,000

9,500

6,800

8,000

4,800

5,000

Manganese

430*

1,300

1,400

630

600

410

540

220

220

480

380

Mercury

2

<0.20

<0.20

0.44

<0.20**

<0.20

<0.20

<0.10**

<4**

<0.20

<0.20

Nickel (soluble salts)

390

82

49

12

9.3

73

73

28

12 J

240

82

Potassium

NE

6,700

7,500

5100

6,300

4,500

2,000

960

<1,000**

2,800

2,100 E

Selenium

50

<1.0

<1.0

0.59 J

<0.5**

7.5

3.5

4.3

<10**

<1.0

<1.0

Silver

94

<1.0

<1.0

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

Sodium

1,000

98,000

110,000

92,000

110,000

110,000

100,000

130,000

150,000

35,000

34,000

Thallium

2

<1.0

<1.0

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

Vanadium

86*

<5.0

<5.0

12

<0.5**

<5.0

<5.0

3.6

<10**

18

<5.0

Zinc

6,000*

59

47

41

25

40

47

53



150

150

-------
Table 7	Yard 56

Metals Groundwater Characterization Summary	Baltimore City, Maryland

GTA Project No. 140080

Page 2 of 3





GTA-MW-3

GTA-MW-4

GTA-MW-5

Sample Identification

Comparison Value

Total

Dissolved

Total

Dissolved

Total

Dissolved

Total

Dissolved

Total

Dissolved

Sample Date

MCL
(RSL as noted)

3/15/2018

1/14/2015

1/29/2015

3/15/2018

1/13/2015

1/29/2015

3/14/2018

Target Analyte List Metals

ug/L



Aluminum

20,000*

170

85 J

280

2,600

800

<50**

<100

8,700

18,000

<1,000**

Antimony

6

<2.5**

<2.5**

<5.0

<5.0

<2.5**

<2.5**

<5.0

17

19

<50**

Arsenic

10

<0.5**

<0.5**

<1.0

1.3

0.74 J

<0.5**

1.7

3.3

4.4

<10**

Barium

2,000

53

54

150

69

35

24

750

710

230

96

Beryllium

4

1.9

1.8

3.2

1.1

0.70 J

0.55 J

<1.0

<20

1.0

<10**

Cadmium

5

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<0.5**

1.3

2.4

2.5

<10**

Calcium

NE

3,500

3,300

31,000

9,900

4,000

4,100

33,000

26,000

10,000

15,000

Total Chromium

100

3.5

0.58 J

6.5

320

14

1.2

<1.0

130

55

<10**

Cobalt

6*

25

25

91

37

18

16

20

37

31

<10**

Copper

1,300

5.1

4.7

1.3

37

6.8

3.4

2.3

58

110

12 J

Iron

14,000*

420

<50**

1,200

15,000

3,900

<100

900

18,000

43,000

<1,000**

Lead

15

1.1

0.56 J

<1.0

11

2.6

<0.5**

60

1,400

2,000

48

Magnesium

NE

2,000

2,800

14,000

3,400

1,400

1,600 J

25,000

19,000

9,700

19,000

Manganese

430*

140

140

880

310

140

110

300

260

210

110

Mercury

2

0.20 J

<0.1**

<0.20

1.0

0.70

<0.1**

<0.20

<4.0

<0.1**

<2**

Nickel (soluble salts)

390

41

36

230

230

25

26

33

95

32

<10**

Potassium

NE

800

750

2,600

3,000

1,400

1,300

9,600

9,400

12,000

13,000

Selenium

50

<0.5**

<0.5**

1.1

<1.0

<0.5**

<0.5**

3.0

2.4

2.0

<10**

Silver

94

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<0.5**

<1.0

<20

<0.5**

<10**

Sodium

1,000

22,000

26,000

86,000

21,000

15,000

17,000

620,000

640,000

590,000

650,000

Thallium

2

<0.5**

<0.5**

<1.0

<1.0

<0.5**

<0.5**

<1.0

<20

<0.5**

<10**

Vanadium

86*

1.8

<0.5**

<5.0

51

18

<0.5**

<5.0

53

73

13 J

Zinc

6,000*

95

90

200

120

83

83

3,900

11,000

12,000

810

-------
Table 7	Yard 56

Metals Groundwater Characterization Summary	Baltimore City, Maryland

GTA Project No. 140080

Page 3 of 3

Sample Identification

Comparison Value

EGW-9D

EGW-10

EGW-12

Total

Dissolved

Total

Dissolved

Total

Dissolved

Total

Dissolved

Total

Dissolved

Sample Date

MCL
(RSL as noted)

1/14/2015

1/29/2015

1/14/2015

1/29/2015

3/14/2018

1/14/2015

1/29/2015

3/15/2018

Target Analyte List Metals

ug/L



Aluminum

20,000*

870

<100

2,600

<100

280

<1,000**

<100

<100

<50.0

<50

Antimony

6

<5.0

<5.0

<5.0

<5.0

3.3 J

<50**

<5.0

<5.0

<2.5**

<2.5**

Arsenic

10

<1.0

<1.0

2.2

1.2

1.6

<10**

<1.0

<1.0

<0.5**

<0.5**

Barium

2,000

22

16

41

32

29

25

67

70

65

66

Beryllium

4

<1.0

<1.0

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

<0.5**

<0.5**

Cadmium

5

<1.0

<1.0

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

<0.5**

<0.5**

Calcium

NE

12,000

11,000

15,000

14,000

17,000

15,000

76,000

66,000

82,000

70,000

Total Chromium

100

31

<1.0

73

1.4

1.5

<10**

56

28

17

31

Cobalt

6*

1.3

<1.0

3.3

1.5

11

<10**

<1.0

<1.0

<0.5**

<0.5**

Copper

1,300

5.9

<1.0

18

8.6

11

<10**

1.7

1.4

1.0

0.76 J

Iron

14,000*

4,600

<100

7,800

<100

610

<1,000**

210

<100

<0.5**

<50**

Lead

15

13

<1.0

72

1.9

30

<10**

<1.0

<1.0

<0.5**

<0.5**

Magnesium

NE

3,300

3,400

23,000

22,000

13,000

15,000

9,900

8,900

12,000

15,000

Manganese

430*

280

220

43

29

320

15 J

10

6.1

13

8.3

Mercury

2

<0.20

<0.20

<0.20

<0.20

<0.1**

<2**

<0.20

<0.20

<0.1**

<0.1**

Nickel (soluble salts)

390

15

1.1

40

14

6.1

<10**

16

1.0

0.65 J

1.4

Potassium

NE

1,400

1,500

84,00

8,500

11,000

13,000

5,700

5,800

6,000

7,400

Selenium

50

1.2

1.7

3.0

4.3

2.9

<10**

9.7

13

12

12

Silver

94

<1.0

<1.0

<1.0

<1.0

<0.5**

<10**

<1.0

<1.0

<0.5**

<0.5**

Sodium

1,000

55,000

58,000

460,000

670,000

660,000

680,000

34,000

28,000

22,000

25,000

Thallium

2

<1.0

<1.0

<1.0

<1.0

<1.0

<10**

<1.0

<1.0

<0.5**

<0.5**

Vanadium

86*

26

<50

47

16

32

26

<5.0

<5.0

1.3

1.3

Zinc

6,000*

41



210

60

93







14 J

13 J

-------
Table 8

Soil Vapor Analysis Summary

Yard 56

Baltimore City, Maryland
GTA Project No. 140080
Page 1 of 3

Sample Identification

MDE Residential Comparison Values

GTA-SV-1

GTA-SV-2

GTA-SV-3

GTA-SV-4

GTA-SV-5

GTA-SV-5A

GTA-SV-5E

GTA-SV-5N

GTA-SV-5W

GTA-SV-5S

GTA-SV-5 NE

GTA-SV-6

GTA-SV-7

GTA-SV-8

GTA-SV-9

GTA-SV-10

GTA-SV-11

GTA-SV-12

Sample Date

Tier 1 Target Soil
Vapor Screening
Values

Tier 2 Target Soil
Vapor Screening
Values

9/8/2017

3/15/2018

9/8/2017

VOCs









































1,1,1-Trichloroethane

104,000

520,000







180















15



3.4





3.8



1,1,2,2-Tetrachloroethane

9.6

48

<170 D

<51 D

<3.4

<3.4

<260 D

<3.4

<3.4

<3.4

<34

<3.4

<3.4

<3.4

<3.4

<3.4

<3.4

<3.4

<3.4

<3.4

l,l,2-Trichloro-l,2,2-Trifluoroethane (Freon 113)

104,000

520,000

<190 D

<57 D

<3.8

<3.8

<290 D

<2.7

<2.7

<2.7

<27

<2.7

<2.7

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

1,1,2-Trichloroethane

4.2

21

<140 D

<41 D

<2.7

<2.7

<200 D

<3.8

<3.8

<3.8

<38

<3.8

<3.8

<2.7

<2.7

<2.7

<2.7

<2.7

<2.7

6.5

1,1-Dichloroethane

360

1,800

<100 D

<30 D

<2.0

<2.0

<150 D

<2.0

<2.0

<2.0

<20

<2.0

<2.0

<2.0

<2.0

11

<2.0

<2.0

<2.0

<2.0

1,1-Dichloroethene

4,200

21,000

<99 D

<30 D

<2.0

<2.0

<150 D

<2.0

<2.0

<2.0

<20

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

1,2,4-Trichlorobenzene

42

210

<190 D

<56 D

<3.7

<3.7

<280 D

<3.7

<3.7

<3.7

<37

<3.7

<3.7

<3.7

<3.7

<3.7

<3.7

<3.7

<3.7

<3.7

1,2,4-Trimethylbenzene

1,260

6,300

<120 D

<37 D

<2.5

<2.5

<180 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

<2.5

5.2

2.8

<2.5

<2.5

33

3.3

1,2-Dibromoethane (EDB)

0.94

4.7

<190 D

<58 D

<3.8

<3.8

<290 D

<3.8

<3.8

<3.8

<38

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

1,2-Dichlorobenzene

4,200

21,000

<150 D

<45 D

<3.0

<3.0

<230 D

<3.0

<3.0

<3.0

<30

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

1,2-Dichloroethane

22

110

<100 D

<30 D

<2.0

<2.0

<150 D

<2.0

<2.0

<2.0

<20

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

3.1

Dichloroethene, trans-1,2-

1,260

6,300





































1,2-Dichloropropane

84.0

420

<230 D

<69 D

<4.6

<4.6

<350 D

<4.6

<4.6

<4.6

<46

<4.6

<4.6

<4.6

<4.6

<4.6

<4.6

<4.6

<4.6

<4.6

1,2-Dichlorotetrafluoroethane (Freon 114)

NE

NE

<170 D

<52 D

<3.5

<3.5

<260 D

<3.5

<3.5

<3.5

<35

<3.5

<3.5

<3.5

<3.5

<3.5

<3.5

<3.5

<3.5

<3.5

1,3,5-Trimethylbenzene

1,260

6,300

<120 D

<37 D

<2.5

<2.5

<180 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

20

<2.5

1,3-Butadiene

18.8

94

<55 D

<17 D

<1.1

<1.1

<83 D

<1.1

<1.1

<1.1

<11

<1.1

<1.1

<1.1

<1.1

<1.1

<1.1

<1.1

<1.1

<1.1

1,3-Dichlorobenzene

NE

NE

<150 D

<45 D

<3.0

<3.0

<230 D

<3.0

<3.0

<3.0

<30

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

1,4-Dichlorobenzene

52

260

<150 D

<45 D

<3.0

<3.0

<230 D

<3.0

<3.0

<3.0

<30

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

<3.0

1,4-Dioxane (P-Dioxane)

112

560

<450 D

<140 D

<9.0

<9.0

<680 D

<9.0

<9.0

<9.0

<90

<9.0

<9.0

<9.0

<9.0

<9.0

<9.0

<9.0

<9.0

<9.0

2,2,4-Trimethylpentene

NE

NE

<120 D

<35 D

24

24

<180 D

<2.3

<2.3

<2.3

<23

<2.3

<2.3

12

7.9

11

<2.3

2.6

12

<2.3

2-Butanone (Methyl Ethyl Ketone)

104,000

520,000

<180 D

<55 D

6.3

8.4

<280 D

<3.7

7.6

<3.7

<37

<3.7

5.5

13

9.7

14

4.6

4.6

13

44

2-Hexanone (Methyl Butyl Ketone)

620

3,100

<260 D

<77 D

<5.1

<5.1

<380 D

<5.1

<5.1

<5.1

<51

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

4-Ethyltoluene

NE

NE

<120 D

<37 D

<2.5

<2.5

<180 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

2.5

<2.5

4-Methyl-2-Pentanone (Methyl Isobutyl Ketone)

62,000

310,000

<260 D

<77 D

<5.1

<5.1

<380 D

<5.1

<5.1

<5.1

<51

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

<5.1

Acetone

640,000

3,200,000

<1200 D

<360 D

26

26

<1,800 D

<24

96

<24

<240

<24

69

61

49

99

<24

<24

110

59

Acrolein

0.84

4.2





































Allyl Chloride (3-Chloropropene)

20

100

<78 D

<23 D

<1.6

<1.6

<120 D

<1.6

<1.6

<1.6

<16

<1.6

<1.6

<1.6

<1.6

<1.6

<1.6

<1.6

<1.6

<1.6

Benzene

72

360

<80 D

<24 D

<1.6

<1.6

<120 D

<1.6

<1.6

<1.6

<16

<1.6

2.0

<1.6

<1.6

2.1

<1.6

<1.6

2.2

<1.6

Benzyl Chloride

11

57

<130 D

<39 D

<2.6

<2.6

<190 D

<2.6

<2.6

<2.6

<26

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

Bromodichloromethane

15

76

<170 D

<50 D

5.0

<3.3

290 D

<3.3

<3.3

<3.3

<33

<3.3

<3.3

<3.3

<3.3

<3.3

<3.3

<3.3

<3.3

<3.3

Bromoethene (Vinyl Bromide)

18

88

<110 D

<33 D

<2.2

<2.2

<160 D

<2.2

<2.2

<2.2

<22

<2.2

<2.2

<2.2

<2.2

<2.2

<2.2

<2.2

<2.2

<2.2

Bromoform

520

2,600

<260 D

<78 D

<5.2

<5.2

<390 D

<5.2

<5.2

<5.2

<52

<5.2

<5.2

<5.2

<5.2

<5.2

<5.2

<5.2

<5.2

<5.2

Bromomethane

104

520

<97 D

<29 D

<1.9

<1.9

<150 D

<1.9

<1.9

<1.9

<19

<1.9

<1.9

<1.9

<1.9

<1.9

<1.9

<1.9

<1.9

<1.9

Carbon Disulfide

14,600

73,000

<1600 D

<470 D

<31

<31

<2,300 D

<31

<31

<31

<310

<31

<31

<31

<31

<31

<31

<31

<31

<31

Carbon Tetrachloride

94

470

7,600 D

5,900 D

72

310 D

<240 D

<3.1

<3.1

6.1

<31

<3.1

<3.1

<3.1

<3.1

<3.1

<3.1

<3.1

3.8

<3.1

Chlorobenzene

1,040

5,200

<120 D

<35 D

<2.3

<2.3

<170 D

<2.3

<2.3

<2.3

<23

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

Chloroethane (Ethyl Chloride)

200,000

1,000,000

<66 D

<20 D

<1.3

<1.3

<99 D

<1.3

<1.3

<1.3

<13

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

Chloroform

24

120

1,400 D

720 D

97

320 D

2,300 D

<2.4

<2.4

3.8

<24

<2.4

9.4

<2.4

<2.4

2.7

3.4

<2.4

5.0

30

Chloromethane

1,880

9,400

<52 D

<15 D

<1.0

<1.0

<77 D

<1.0

<1.0

<1.0

<10

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

<1.0

Cyclohexane

126,000

630,000

<86 D

<26 D

2.1

2.2

<130 D

<1.7

<1.7

<1.7

<17

<1.7

<1.7

<1.7

<1.7

2.1

<1.7

<1.7

<1.7

<1.7

Chlorodifluoromethane

1,060,000

5,300,000





































Dibromochloromethane

NE

NE

<210 D

<64 D

<4.3

<4.3

<320 D

<4.3

<4.3

<4.3

<43

<4.3

<4.3

<4.3

<4.3

<4.3

<4.3

<4.3

<4.3

<4.3

Dichlorodifluoromethane (Freon 12)

2,000

10,000

<120 D

<37 D

<2.5

380 D

<190 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

2.7

2.6

<2.5

<2.5

<2.5

<2.5

<2.5

Ethyl Acetate

1,460

7,300

<90 D

<27 D

<1.8

<1.8

<140 D

<1.8

<1.8

<1.8

<18

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

Ethylbenzene

220

1,100

<110 D

<33 D

<2.2

<2.2

<160 D

<2.2

<2.2

<2.2

<22

<2.2

<2.2

4.6

<2.2

5.9

<2.2

<2.2

<2.2

4.4

Hexachlorobutadiene

26

130

<270 D

<80 D

<5.3

<5.3

<400 D

<5.3

<5.3

<5.3

<53

<5.3

<5.3

<5.3

<5.3

<5.3

<5.3

<5.3

<5.3

<5.3

Isopropylbenzene (Cumene)

8,400

42,000

<120 D

<37 D

<2.5

<2.5

<180 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

3.9

<2.5

Methyl Acetate

NE

NE





































Methyl-t-butyl ether

2,200

11,000

<230 D

<68 D

<4.5

<4.5

<340 D

<1.8

<1.8

<1.8

<18

<1.8

<1.8

<4.5

<4.5

11

<4.5

<4.5

<4.5

<4.5

Methyl Isobutyl Ketone (MIK)

64,000

320,000





































Methylene Chloride

12,600

63,000

<1700 D

<520 D

<35

<35

<2,600 D

<35

<35

<35

<350

<35

<35

<35

<35

<35

<35

<35

<35

<35

Met hy 1 cy c 1 oh exa ne

NE

NE





































Naphthalene

17

83

<130 D

<39 D

<2.6

<2.6

<200 D

<2.6

<2.6

<2.6

<26

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

<2.6

Pentane

22,000

110,000





































Propylene

62,000

310,000

<220 D

<65 D

<4.3

<4.3

<320 D

<4.3

<4.3

<4.3

<43

<4.3

<4.3

5.6

<4.3

<4.3

<4.3

<4.3

<4.3

55

Octane

NE

NE





































Styrene

20,000

100,000

<530 D

<160 D

<11

<11

<800 D

<11

<11

<11

<110

<11

<11

<11

<11

<11

<11

<11

<11

<11

Tetrachloroethene (PCE)

840

4,200

810

2,400 D

12

1,600 D

380,000 DE

15

6.6

1,300

3,600

77

3.4

190

14

450

280

<3.4

29

9.2

Tertiary butyl alcohol

NE

NE





































Tetrahydrofuran

42,000

210,000

<74 D

<22 D

<1.5

<1.5

<110 D

<1.5

<1.5

<1.5

<15

<1.5

<1.5

<1.5

<1.5

<1.5

<1.5

<1.5

<1.5

3.3

Toluene

104,000

520,000

<94 D

<28 D

3.2

<1.9

<140 D

<1.9

<1.9

<1.9

<19

<1.9

<1.9

2.5

2.7

7.0

<1.9

<1.9

6.9

7.0

Trichloroethene (TCE)

42

210

<130 D

<40 D

<2.7

5.2

23,000 D

<2.7

<2.7

<2.7

150

<2.7

<2.7

70

<2.7

30

33

<2.7

<2.7

<2.7

Trichlorofluoromethane (Freon 11)

14,600

73,000

<140 D

<42 D

<2.8

680 D

<210 D

<2.8

<2.8

<2.8

<28

<2.8

<2.8

<2.8

<2.8

<2.8

<2.8

<2.8

<2.8

<2.8

Vinyl Acetate

4,200

21,000

<88 D

<26 D

<1.8

<1.8

<130 D

<1.8

<1.8

<1.8

<18

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

<1.8

Vinyl Chloride

34

170

<64 D

<19 D

<1.3

<1.3

<96 D

<1.3

<1.3

<1.3

<13

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

<1.3

cis-l,2-Dichloroethene

NE

NE

<99 D

<30 D

<2.0

<2.0

250

<2.0

<2.0

<2.0

<20

<2.0

11

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

cis-l,3-Dichloropropene

140

700

<110 D

<34 D

<2.3

<2.3

<170 D

<2.3

<2.3

<2.3

<23

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

<2.3

m,p-Xylenes

2,000

10,000

<220 D

<65 D

<4.3

<4.3

<330 D

<2.2

<2.2

<2.2

<22

<2.2

<2.2

22

4.4

28

<4.3

<4.3

6.6

14

n-Heptane

8,400

42,000

<100 D

<31 D

4.3

3.3

<150 D

<2.0

<2.0

<2.0

<20

<2.0

<2.0

<2.0

<2.0

3.1

<2.0

<2.0

2.7

<2.0

n-Hexane

14,600

73,000

<1800 D

<530 D

<35

<35

<2600 D

<35

<35

<35

<350

<35

<35

<35

<35

<35

<35

<35

<35

<35

n-Propylbenzene

20,000

100,000

<120 D

<37 D

<2.5

<2.5

<180 D

<2.5

<2.5

<2.5

<25

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

<2.5

3.2

<2.5

o-Xylene

2,000

10,000

<110 D

<33 D

<2.2

<2.2

<160 D

<2.2

<2.2

<2.2

<22

<2.2

<2.2

11

<2.2

11

<2.2

<2.2

9.0

3.8

trans-l,2-Dichloroethene

NE

NE

<99 D

<30 D

<2.0

<2.0

410 D

<2.0

<2.0

<2.0

<20

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

<2.0

trans-l,3-Dichloropropene

140

700





































Notes:

Results expressed in micrograms per cubic meter (pg/m3)

Detected compounds shown in black

MDE = Maryland Department of the Environment

Shaded and bold values represent exceedance of MDE Tier 1 Target Soil Vapor screening values for
residential land use

Shaded and bold values represent exceedance of MDE Tier 2 Target Soil Vapor screening values for
residential land use
USEPA = United States Environmental Protection Agency
VOCs = Volatile Organic Compounds

RSL= Regional Screening Level, from USEPA November 2017
Adjusted RSL uses CR = 10"5 rather than 10"6
NE = No published guidance value

CR = cancer risk (increase in cancer risk due to exposure to chemical of potential concern)
Non-carcinogens are expressed with hazard index (HI) = 1.0

= The Adjusted RSLs in this table for these chemicals are for total 1,3-Dichloropropene.

The cis- and trans- components are not included in the USEPA RSL table.

D = Subject to Dilution

E = The data exceeds the upper calibration limit; therefore, the concentration is reported as estimated

-------
Table 8

Soil Vapor Analysis Summary

Yard 56

Baltimore City, Maryland
GTA Project No. 140080
Page 2 of 3

Sample Identification

MDE Residential Comparison Values

GTA-SV-13

GTA-SV-14

GTA-SV-15

GTA-SV-16

ESG-5

ESG-6

ESG-6 dup

ESG-7

ESG-9

ESG-11

ESG-16

ESG-17

ESG-18

ESG-20

ESG-20 dup

ESG-21

ESG-22

ESG-23

ESG-24

Sample Date

Tier 1 Target Soil
Vapor Screening
Values

Tier 2 Target Soil
Vapor Screening
Values

9/8/2017

12/20/2016

12/21/2016

8/17/2007

6/23/2010

8/17/2007

8/29/2007

9/11/2008

VOCs











































1,1,1-Trichloroethane

104,000

520,000





























28 L









1,1,2,2-Tet rac h lo roet ha ne

9.6

48

<3.4

<3.4

<3.4

<3.4

<1.4

<1.4

<1.4

<1.4

<1.4

<5.5

<1.4

<1.4

<1.4

<14

32 L

<21,000

<1.4

<11



l,l,2-Trichloro-l,2,2-Trifluoroethane (Freon 113)

104,000

520,000

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<3.8

<6.1

<3.8

4.4 J

<3.8

<38

— L

<57,000

<3.8

<12



1,1,2-Trichloroethane

4.2

21

<2.7

4.0

<2.7

5.3

<1.1

<1.1

<1.1

<1.1

<1.1

<4.4

<1.1

<1.1

39

<11

20 L

<16,000

<1.1

<8.7



1,1-Dichloroethane

360

1,800

<2.0

<2.0

<2.0

<2.0

<0.81

<0.81

<0.81

<0.81

<0.81

<3.2

<0.81

<0.81

<0.81

<8.1

20 L

<12,000

<0.81

<6.5



1,1-Dichloroethene

4,200

21,000

<2.0

<2.0

<2.0

<2.0

<0.79

<0.79

<0.79

<0.79

<0.79

<3.2

<0.79

<0.79

9.8

<7.9

20 L

<12,000

<0.79

<6.3



1,2,4-Trichlorobenzene

42

210

<3.7

<3.7

<3.7

<3.7































1,2,4-Trimethylbenzene

1,260

6,300

14

3.3

<2.5

14

2.3 J

1.7 J

1.5 J

1.4 J



16 B















<7.9



1,2-Dibromoethane (EDB)

0.94

4.7

<3.8

<3.8

<3.8

<3.8

<1.5

<1.5

<1.5

<1.5



<6.1

<1.5

<1.5

<1.5

<15

28 L

<23,000

<1.5

<12



1,2-Dichlorobenzene

4,200

21,000

<3.0

<3.0

<3.0

<3.0

<1.2

<1.2

<1.2

<1.2



<4.8

<1.2

<1.2

<1.2

<12

20 L

<18,000

<1.2

<9.6



1,2-Dichloroethane

22

110

<2.0

<2.0

<2.0

2.7

<0.81

<0.81

<0.82

<0.81

<0.81

<3.2

<0.81

<0.81

<0.81

<8.1

18 L

<12,000

<0.81

<6.5



Dichloroethene, trans-1,2-

1,260

6,300







































1,2-Dichloropropane

84.0

420

<4.6

<4.6

<4.6

<4.6

<0.92

<0.92

<0.92

<0.92

<0.92

<3.7

<0.92

<0.92

<0.92

<9.2

20 L

<14,000

<0.92

<7.4



1,2-Dichlorotetrafluoroethane (Freon 114)

NE

NE

<3.5

<3.5

<3.5

<3.5































1,3,5-Trimethylbenzene

1,260

6,300

8.0

<2.5

<2.5

5.3

<0.98

<0.98

<0.98

<0.98



4.5 B



















1,3-Butadiene

18.8

94

<1.1

<1.1

<1.1

<1.1































1,3-Dichlorobenzene

NE

NE

<3.0

<3.0

<3.0

<3.0

<1.2

<1.2

<1.3

<1.2

<1.2

8.4

14 KDL

<1.2 EST

9.4 EST

14 K EST

31 L EST

<18,000

<1.2

<9.6



1,4-Dichlorobenzene

52

260

<3.0

<3.0

<3.0

<3.0

<1.2

<1.2

<1.4

<1.2

<1.2

<4.8

<1.2 EST

1.3 K EST

1.3 J

<12 EST

20 L EST

<18,000

<1.2

<9.6



1,4-Dioxane (P-Dioxane)

112

560

<9.0

<9.0

<9.0

<9.0































2,2,4-Trimethylpentene

NE

NE

<2.3

<2.3

<2.3

9.8

1 J

1 J

<0.93

1.2 J



2.7 J



















2-Butanone (Methyl Ethyl Ketone)

104,000

520,000

18

24

18

37

24

6

7

15

5.1 J

11

8.2

2.8 J

<1.5

46 J

29 L

<22,000

27

<4.7



2-Hexanone (Methyl Butyl Ketone)

620

3,100

<5.1

<5.1

<5.1

20

<2.0

<2.0

<2.0

<2.0

<2.0

1.8

<2.0

2.7 J

8.2 J

<20

<20 L

<31,000

<2.0

<6.5



4-Ethyltoluene

NE

NE

3.4

<2.5

<2.5

3.4

1.4 J

0.98

1.6 J

1.7 J



4.9 B















<7.9



4-Methy 1-2-Penta none (Methyl 1 so butyl Ketone)

62,000

310,000

<5.1

<5.1

<5.1

<5.1

3.8 J

<2.0

<2.0

<2.0

5.3 J

2.7 J

84

<2.0

16

26 J

<20 L

<31,000

44





Acetone

640,000

3,200,000

28

43

30

49

78

57 B

59 B

270

35

105

50

28

85 J

220

130 L

22,000 J

660

17

249

Acrolein

0.84

4.2









<0.79

5.3

3.2 J

4.1 J























Allyl Chloride (3-Chloropropene)

20

100

<1.6

<1.6

<1.6

<1.6































Benzene

72

360

<1.6

<1.6

<1.6

<1.6

1.8 J

3.4

2.2 J

4.2

1.4 J

11

16

1.6 J

160

110

30 L

<9,600

5.2

<5.1

3.2

Benzyl Chloride

11

57

<2.6

<2.6

<2.6

<2.6































Bromodichloromethane

15

76

<3.3

<3.3

<3.3

<3.3

<1.7

<1.3

<1.3

<1.3

<1.3

<5.4

5 J

<1.3

5.2 J

<13

<13 L

<20,000

<1.3

<11

<11

Bromoethene (Vinyl Bromide)

18

88

<2.2

<2.2

<2.2

<2.2





























<6.2

Bromoform

520

2,600

<5.2

<5.2

<5.2

<5.2































Bromom ethane

104

520

<1.9

<1.9

<1.9

<1.9

<0.78

<0.78

<0.78

<0.78

<0.78

<3.1

<0.78

<0.78

<0.78

<0.78

19 L

<12,000

<0.78

<6.2



Carbon Disulfide

14,600

73,000

<31

<31

<31

<31

<0.62

<0.62

<0.62

5.2

0.72 J

6.9

200

0.75 J

69

160

82 L

18,000 J

3.9

20

<5.0

Carbon Tetrachloride

94

470

<3.1

<3.1

<3.1

<3.1

<1.3

<1.3

<1.3

<1.3

<1.3

81.8

<1.3

1.8 J

<1.3

33 J

37 L

<19,000

<1.3

<10

<10

Chlorobenzene

1,040

5,200

<2.3

<2.3

<2.3

<2.3

<0.92

<0.92

<0.92

<0.92

<0.92

<3.7

<0.92

<0.92

<0.92

<9.2

12 L

<14,000

<0.92

<7.4

<7.4

Chloroethane (Ethyl Chloride)

200,000

1,000,000

<1.3

<1.3

<1.3

<1.3































Chloroform

24

120

7.3

14

22

5.7

<0.98

<0.98

<0.98

4.3 J

<0.98

7.8

51

4.8 J

48

53

30 L

160,000

<0.98

36

6.8

Chloromethane

1,880

9,400

<1.0

<1.0

<1.0

<1.0

1.3 J

1.3 J

0.99 J

2.6

2.1

<1.7

<0.41

2.4

<0.41

<4.1

21 L

<6,200

<0.41

<3.3

<3.3

Cyclohexane

126,000

630,000

<1.7

<1.7

<1.7

<1.7































Chlorodifluoromethane

1,060,000

5,300,000





































<5.6

Dibromochloromethane

NE

NE

<4.3

<4.3

<4.3

<4.3































Dichlorodifluoromethane (Freon 12)

2,000

10,000

<2.5

8.3

<2.5

<2.5

4.8 J

2.4 J

2.2 J

2.9 J



2.4 J

















<7.9

Ethyl Acetate

1,460

7,300

<1.8

<1.8

<1.8

<1.8































Ethylbenzene

220

1,100

2.4

5.8

<2.2

5.9

1.1J

2 J

1.2 J

1.6 J

1.5 J

9.6 B

7.6

0.87

98

44

20 L

<13,000

2.5 J

<6.9

<6.9

Hexachlorobutadiene

26

130

<5.3

<5.3

<5.3

<5.3































Isopropylbenzene (Cumene)

8,400

42,000

<2.5

<2.5

<2.5

<2.5

<0.98

3.9 J

<0.98

19

<0.98

<3.9

<0.98

<0.98

5.8

<9.8

<9.8 L

<15,000

<0.98

<7.9

<7.9

Methyl Acetate

NE

NE

















DL



DL

DL

91J

DL

DL

DL

DL





Methyl-t-butyl ether

2,200

11,000

<4.5

<4.5

<4.5

<4.5

<0.72

<0.72

<0.72

<0.72

<0.72

<2.9

76

<0.72

410

210

<7.2 L



42

<5.8

<5.8

Methyl Isobutyl Ketone (MIK)

64,000

320,000







































Methylene Chloride

12,600

63,000

<35

<35

<35

<35

0.87 J

8.3 B

<0.69

<0.69

<0.69

<2.8

13

20

1.1J

56

65 L

17,000 J

1.8 J

<5.6

<5.6

Methylcyclohexane

NE

NE

















DL

120 J

DL

DL

120 J

80 J

DL

DL

DL





Naphthalene

17

83

<2.6

<2.6

<2.6

<2.6

<2.1

2.1 J

<2.1

<2.1

<2.1



<2.1

<2.1

<2.1

<2.1

<2.1 L

<310







Pentane

22,000

110,000









4.1

9

4.5 J

6.5



23















<4.7

<4.7

Propylene

62,000

310,000

<4.3

<4.3

<4.3

6.5

<0.34

13

6.3 J

27























Octane

NE

NE









2.4 J

3.2 J

1.7 J

3.7 J



7.9 B















<7.5



Styrene

20,000

100,000

<11

<11

<11

<11

<0.85

<0.85

<0.85

<0.85

0.98 J

<3.4

4.1 J

<0.85

<0.85

13 J

19 L

<13,000

<0.85

<6.8

<6.8

Tetrachloroethene (PCE)

840

4,200

2,300 D

980 D

62

580 D

<1.4

5 J

2.1 J

4.5 J

2.8 J

1.5

87



50

15,000

2,800 L

7,500,000

<1.4

<11

<11

Tertiary butyl alcohol

NE

NE









12

7.2

14

























Tetrahydrofuran

42,000

210,000

<1.5

1.9

<1.5

<1.5































Toluene

104,000

520,000

4.0

7.9

<1.9

5.6

8.2

11

9

6.5

7.4

34

68

70

950

580

96 L

14,000 J

16

11

8.7

Trichloroethene (TCE)

42

210

60

<2.7

<2.7

29



1.2 J

<1.1

500

1.5 J

<0.86

1,300

<1.1

250

3,100

850 L

1,200,000

<1.1

<8.6

<8.6

Trichlorofluoromethane (Freon 11)

14,600

73,000

<2.8

<2.8

<2.8

<2.8

1.1 J

2.IK

1.2 J

1.3 J

1.3 J

<4.5

1.9 J

15

3 J

<11

31 L

<17,000

1.6 J

<9.0

<9.0

Vinyl Acetate

4,200

21,000

<1.8

<1.8

<1.8

<1.8































Vinyl Chloride

34

170

<1.3

<1.3

<1.3

<1.3

<0.51

<0.51

<0.51

<0.51

<0.51

<2.0

<0.51

<0.51

<0.51

<5.1

15 L

47,000

<0.51

<4.1



cis-l,2-Dichloroethene

NE

NE

<2.0

<2.0

<2.0

3.2

<0.79

<0.79

<0.79

4.7

<0.79

<3.2

5.2

<0.79

55

7,900

1,700 L

870,000

13



<6.3

cis-l,3-Dichloropropene

140

700

<2.3

<2.3

<2.3

<2.3

<0.91

<0.91

<0.91

<0.91

<0.91

<3.6

<0.91

<0.91

<0.91

<0.91

15 L

<14,000

<0.91

<7.3

<7.3

m,p-Xylenes

2,000

10,000

9.0

19

<4.3

20

3.4 J

7.1 J

3.8 J

3.9 J

5.3

33 B

14

1.3 J

150

61

37 L

<13,000

8.8

6.9

6.9

n-Heptane

8,400

42,000

<2.0

<2.0

<2.0

<2.0

4.3

1.8 J

1.9 J

2 J



7.4 B















<6.6

<7.8

n-Hexane

14,600

73,000

<35

<35

<35

<35

1.9 J

2.4 J

1.5 J

2.8 J



11 B















<5.6

<4.2

n-Propylbenzene

20,000

100,000

2.6

<2.5

<2.5

3.1































o-Xylene

2,000

10,000

5.3

6.3

<2.2

9.1

1.3 J

2.6 J

1.6 J

1.5 J

2.3 J

12 B

9.7

1.1 J

71

37 J

22 L

<13,000

3.1 J

<6.9

<6.9

trans-l,2-Dichloroethene

NE

NE

<2.0

<2.0

<2.0

2.4

<0.79

<0.79

<0.79

1.5 J

<0.79

<3.2

<0.79

<0.79

<0.79

28 J

<7.9

59,000 J

<0.79

<6.3

<6.3

trans-l,3-Dichloropropene

140

700





























14 L









Notes:

Results expressed in micrograms per cubic meter (pg/m3)

Detected compounds shown in black

MDE = Maryland Department of the Environment

Shaded and bold values represent exceedance of MDE Tier 1 Target Soil Vapor screening values for
residential land use

Shaded and bold values represent exceedance of MDE Tier 2 Target Soil Vapor screening values for
residential land use
USE PA = United States Environmental Protection Agency
VOCs = Volatile Organic Compounds

RSL = Regional Screening Level, from USE PA November 2017
Adjusted RSL uses CR = 10"5 rather than 10"6
NE = No published guidance value

CR = cancer risk (increase in cancer risk due to exposure to chemical of potential concern)
Non-carcinogens are expressed with hazard index (HI) = 1.0

= The Adjusted RSLs in this table for these chemicals are for total 1,3-Dichloropropene.

The cis- and trans- components are not included in the USEPA RSL table.

D = Subject to Dilution

E = The data exceeds the upper calibration limit; therefore, the concentration is reported as estimated

-------
Table 8

Soil Vapor Analysis Summary

Yard 56

Baltimore City, Maryland
GTA Project No. 140080
Page 3 of 3

Sample Identification

MDE Residential Comparison Values

ESG-25

ESG-26

ESG-26 dup

ESG-26

ESG-27

ESG-28

ESG-29

ESG-30A

ESG-30A dup

ESG-31

ESG-32

ESG-32 DUP

ESG-33

ESG-34

ESG-34A

ESG-35

Sample Date

Tier 1 Target Soil
Vapor Screening
Values

Tier 2 Target Soil
Vapor Screening
Values

9/11/2008

6/23/2010

9/11/2008

12/18/2009

6/23/2010

10/23/2013

VOCs





































1,1,1-Trichloroethane

104,000

520,000

































1,1,2,2-Tet rac h lo roet ha ne

9.6

48

<11

<11

<11

<5.5

<11

<11

<11

<0.62

<0.62

<1.6

<5.5

<5.5









l,l,2-Trichloro-l,2,2-Trifluoroethane (Freon 113)

104,000

520,000

<12

<12

<12

<6.1

<12

<12

<12

<0.67

<0.67

<1.7

<6.1

<6.1









1,1,2-Trichloroethane

4.2

21

<8.7

<8.7

<8.7

<4.4

<8.7

<8.7

<8.7

<0.46

<0.46

<1.1



<4.4









1,1-Dichloroethane

360

1,800

<6.5

<6.5

<6.5

<3.2

<6.5

<6.5

<6.5

<0.57

<0.57

<1.5

<3.2

<3.2









1,1-Dichloroethene

4,200

21,000

<6.3

<6.3

<6.3

<3.2

<6.3

<6.3

<6.3

<0.71

<0.71

<1.7

<3.2

<3.2









1,2,4-Trichlorobenzene

42

210

































1,2,4-Trimethylbenzene

1,260

6,300

<7.9

<7.9

<7.9

11 B

<7.9

<7.9

<7.9

11J

6.9 J

18 J

16 B

14 B









1,2-Dibromoethane (EDB)

0.94

4.7

<12

<12

<12

<6.1

<12

<12

<12

<0.63

<0.63

<1.6

<6.1

<6.1









1,2-Dichlorobenzene

4,200

21,000

<9.6

<9.6

<9.6

<4.8

<9.6

<9.6

<9.6

<0.9

<0.9

<2.2

<4.8

<4.8









1,2-Dichloroethane

22

110

































Dichloroethene, trans-1,2-

1,260

6,300

<6.3

<6.3

<6.3

<3.2

<6.3

<6.3

<6.3

<0.56

<0.56

<1.4

<3.2

<3.2









1,2-Dichloropropane

84.0

420

<7.4

<7.4

<7.4

<3.7

<7.4

<7.4

<7.4

<0.51

<0.51

<1.3

<3.7

<3.7









1,2-Dichlorotetrafluoroethane (Freon 114)

NE

NE

































1,3,5-Trimethylbenzene

1,260

6,300







3.1 B







2.5 J

2 J

4.8 J

4.6 B

3.6 B









1,3-Butadiene

18.8

94

































1,3-Dichlorobenzene

NE

NE

<9.6

<9.6

<9.6

6.6

<9.6

<9.6

<9.6

<0.78

<0.78

<1.9

45

49









1,4-Dichlorobenzene

52

260

<9.6

<9.6

<9.6

<4.8

<9.6

<9.6

<9.6

<0.78

<0.78

<1.9

<4.8

<4.8









1,4-Dioxane (P-Dioxane)

112

560

































2,2,4-Trimethylpentene

NE

NE







<3.7







196

191

2,700

<3.7

<3.7









2-Butanone (Methyl Ethyl Ketone)

104,000

520,000

33.3

8.3

5.3

<2.4

<4.7

<4.7

16

4.4

4.7

<1.2

24

25









2-Hexanone (Methyl Butyl Ketone)

620

3,100

<6.5

<6.5

<6.5

<3.3

<6.5



<6.5

<0.49

<0.49

<1.2

<3.3

<3.3









4-Ethyltoluene

NE

NE

<7.9

<7.9

<7.9

2.7 B

<7.9

<7.9

<7.9

<0.84

<0.84

<2.1

4.4 B

4.9 B









4-Methy 1-2-Penta none (Methyl 1 so butyl Ketone)

62,000

310,000

































Acetone

640,000

3,200,000

587 J

249

212

13

67

121

461

18

17

<0.93

278

309









Acrolein

0.84

4.2

































Allyl Chloride (3-Chloropropene)

20

100

































Benzene

72

360

6.7

<5.1

<5.1

<2.6

<5.1

<5.1

<5.1

33.5 J

33.2 J

696 J

3.8

4.2









Benzyl Chloride

11

57

































Bromodichloromethane

15

76

<11

<11

<11

<5.4

<11

<11

<11

<7.4

<7.4

<1.9

<5.4

<5.4









Bromoethene (Vinyl Bromide)

18

88

































Bromoform

520

2,600

































Bromom ethane

104

520

<6.2

<6.2

<6.2

<3.1

<6.2

<6.2

<6.2

<0.37

<0.37

<0.93

<3.1

<3.1









Carbon Disulfide

14,600

73,000

14

<5.0

<5.0

<2.5

<5.0

<5.0

<5.0

<0.04

<0.04

<1.1

9.7 J

<2.5 U,J









Carbon Tetrachloride

94

470

<10.0

176

159

97.5

<10

<10

<10

<0.55

<0.55

<1.4

3 J

3.1 J









Chlorobenzene

1,040

5,200

<7.4

<7.4

<7.4

<3.7

<7.4

<7.4

<7.4

<0.46

<0.46

<1.2

2 J

<3.7









Chloroethane (Ethyl Chloride)

200,000

1,000,000

































Chloroform

24

120

23

11

10

6.8

<7.8

<7.8

<7.8

<0.54

<0.54



<3.9

<3.9









Chloromethane

1,880

9,400

<3.3

<3.3

<3.3

<1.7

<3.3

<3.3

<3.3

<0.39

<0.39

<0.97

2.3

1.9









Cyclohexane

126,000

630,000

































Chlorodifluoromethane

1,060,000

5,300,000

<5.6

<5.6

<5.6

<2.8

<5.6

<5.6

<5.6

<0.67

<0.67

<1.6

<2.8

<2.8









Dibromochloromethane

NE

NE

































Dichlorodifluoromethane (Freon 12)

2,000

10,000

<7.9

<7.9

<7.9

2.7 J

<7.9

<7.9

<7.9

2.4 J

2.6 J

<1.2

2.9 J

2.6 J









Ethyl Acetate

1,460

7,300

































Ethylbenzene

220

1,100

4 J

<6.9

<6.9

2.9 B

<6.9

<6.9

<6.9

2.9 J

5.2 J

28 J

6.5 B

6.1 B









Hexachlorobutadiene

26

130

































Isopropylbenzene (Cumene)

8,400

42,000

<7.9

<7.9

<7.9

<7.9

<3.9

<7.9

<7.9

0.88 J

<0.39

<0.98

<3.9

<3.9









Methyl Acetate

NE

NE

































Methyl-t-butyl ether

2,200

11,000

11

<5.8

<5.8

<2.9

<5.8

<5.8

<5.8

<0.32

<0.32

<0.79

<2.9

<2.9









Methyl Isobutyl Ketone (MIK)

64,000

320,000







<3.3







<0.74

<0.74

<1.8

2.3 J

<3.3









Methylene Chloride

12,600

63,000

<5.6

<5.6

<5.6

<2.8

16

<5.6

<5.6

<0.35

<0.35

<0.87

<2.8

<2.8









Methylcyclohexane

NE

NE

































Naphthalene

17

83

































Pentane

22,000

110,000

<4.7

<4.7

<4.7

<2.4

<4.7



<4.7

<0.32

<0.32

<0.82

<2.4

<2.4









Propylene

62,000

310,000

































Octane

NE

NE

<7.5

<7.5

<7.5

<3.7

<7.5

<7.5

<7.5

<0.43

<0.43

<1.1

6.1 B

8.4 B









Styrene

20,000

100,000

<6.8

<6.8

<6.8

<3.4

<6.8

<6.8

<6.8

<0.32

<0.32

<0.77

<3.4

<3.4









Tetrachloroethene (PCE)

840

4,200

27

27

22

47

11

<11

15











122

101

20.1

1,140,000

Tertiary butyl alcohol

NE

NE

































Tetrahydrofuran

42,000

210,000

































Toluene

104,000

520,000

9.8

4.9 J

4.9 J

6 B

6.4

<6.0

6.4

24 J

31

656 J

20

19









Trichloroethene (TCE)

42

210

<8.6

<8.6

<8.6

2.4

<8.6

6.4 J

<8.6

<0.4

1.4 J

<1

<0.86

<0.86

24.5

11.2

6.02

146,000

Trichlorofluoromethane (Freon 11)

14,600

73,000

<9.0

<9.0

<9.0

<4.5

7.3 J

<9.0

<9.0

<0.48

<0.48

<1.2

3 J

<4.5









Vinyl Acetate

4,200

21,000

































Vinyl Chloride

34

170

<4.1

<4.1

<4.1

<2.0

<4.1

<4.1

<4.1

<0.24

<0.24

<0.59

<2.0

<2.0









cis-l,2-Dichloroethene

NE

NE

<6.3

<6.3

<6.3

<3.2

<6.3

<6.3

<6.3

<0.44

<0.44

<1.1

<3.2

<3.2









cis-l,3-Dichloropropene

140

700

<7.3

<7.3

<7.3

<3.6

<7.3

<7.3

<7.3

<0.35

<0.35

<0.86

<3.6

<3.6









m,p-Xylenes

2,000

10,000

10

6.1 J

5.6 J

10 B

6.9

<6.9

6.9

9.6 J

17 J

73.4 J

23 B

23 B









n-Heptane

8,400

42,000

20

<6.6

<6.6

<3.3

<6.6

<6.6

<6.6

72.5 J

78.3 J

1,020 J

2.4 B

2.4 B









n-Hexane

14,600

73,000

15

<5.6

<5.6

<2.8

<5.6

<5.6

<5.6

182 J

178 J

1,910

3.2 B

3.5 B









n-Propylbenzene

20,000

100,000

































o-Xylene

2,000

10,000

<6.9

<6.9

<6.9

4.3 B

<6.9

<6.9

<6.9

4.3 J

6.5 J

20 J

9.1 B

8.7 B









trans-l,2-Dichloroethene

NE

NE

































trans-l,3-Dichloropropene

140

700

































Notes:

Results expressed in micrograms per cubic meter (pg/m3)

Detected compounds shown in black

MDE = Maryland Department of the Environment

Shaded and bold values represent exceedance of MDE Tier 1 Target Soil Vapor screening values for
residential land use

Shaded and bold values represent exceedance of MDE Tier 2 Target Soil Vapor screening values for
residential land use
USE PA = United States Environmental Protection Agency
VOCs = Volatile Organic Compounds

RSL = Regional Screening Level, from USE PA November 2017
Adjusted RSL uses CR = 10"5 rather than 10"6
NE = No published guidance value

CR = cancer risk (increase in cancer risk due to exposure to chemical of potential concern)
Non-carcinogens are expressed with hazard index (HI) = 1.0

= The Adjusted RSLs in this table for these chemicals are for total 1,3-Dichloropropene.

The cis- and trans- components are not included in the USEPA RSL table.

D = Subject to Dilution

E = The data exceeds the upper calibration limit; therefore, the concentration is reported as estimated

-------
Figures

-------
I	X/'

\V^

HI

W$.m

ftuS

j'P:1t'V \ 7\v
H;!\ ' St St3n'9l3ll$ «

\ Cem, jgA

/ «

/ i

APPROXIMATE SUBJECT
PROPERTY BOUNDARY

NOTES

1.	BASED ON THE USGS BALTIMORE EAST, MD 7.5 MINUTE QUADRANGLE MAP.

2.	COPYRIGHT 2013 MYTOPO, INC.

500 1,000

APPROXIMATE SCALE
1 INCH = 1,000 FEET

q=D , t
~ Lj_ U O 4 1

D C?

GEO-TECHNOLOGY ASSOCIATES, INC.
GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 or (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
©GEO-TECHNOLOGYASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

SITE LOCATION MAP

-------
ESB-56

GTA-SB-17

ESB-54

SHEET KEY MAP

SCALE: 1" = 400'

470 mg/kg (4-5*.

IRON 87,000 mg/kg (0-2*)
BENZ0(A)ANTHRACENE 1.6 mg/kg (0-2*)
0.53 mg/kg (4-5')
5 mg/kg (0-2')
0.47mg/kg (4—5')
INDEN0(1,2,3-CD)PYRENE 1.0 mg/kg (0-2')
0.3mg/kg (4—5')

MATCHLINE (SEE SHEET 2B FOR CONTINUATION)

LEGEND:

a

ESB-59

w

ESB-59

ARSENIC 5,3 mg/kg

USB-7

®
USB-7

ARSENIC 5.3 mg/kg

A

GTA-SB-30
GTA-SB-31

ARSENIC 5.3 mg/kg

APPROXIMATE SUBJECT PROPERTY BOUNDARY

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(ERM, 2006-2013)

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(ERM, 2006-2013) EXCEEDANCES OF THE USEPA
REGION 3 RESIDENTIAL RSLS

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(URBAN GREEN, 2013)

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(URBAN GREEN, 2013) EXCEEDANCES OF THE USEPA
REGION 3 RESIDENTIAL RSLS

SOIL SAMPLE LOCATIONS PERFORMED BY GTA

SOIL SAMPLE LOCATIONS PERFORMED BY GTA
EXCEEDANCES OF THE USEPA REGION 3
RESIDENTIAL RSLS

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

NOTES:

IO' 2O' 3O'

4.

BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

REFER TO THE SVOCS AND PCBS SOIL CHARACTERIZATION SUMMARY TABLE (TABLE
4), THE VOCS SOIL CHARACTERIZATION SUMMARY TABLE (TABLE 3), AND THE METALS
SOIL CHARACTERIZATION SUMMARY TABLE (TABLE 5) FOR COMPLETE SOIL DATA
SUMMARY.

GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

UU—I

SCALE: 1"=30'

FIGURE
2A

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

SOIL SAMPLE LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 ISCALE: 1" = 30' I DESIGN BY: MDP I REVIEW BY: KPP I FIGURE:

-------
ESB-69

ESB-74

A

GTA-SB-30

A

GTA-SB-31

ARSENIC 5.3 mg/kg

¦ ¦¦¦¦¦¦¦¦¦¦¦

NOTES:

1.	BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

2.	PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

3.	REFER TO THE SVOCS AND PCBS SOIL CHARACTERIZATION SUMMARY TABLE (TABLE
4), THE VOCS SOIL CHARACTERIZATION SUMMARY TABLE (TABLE 3), AND THE METALS
SOIL CHARACTERIZATION SUMMARY TABLE (TABLE 5) FOR COMPLETE SOIL DATA
SUMMARY.

4.	GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

SHEET KEY MAP

SCALE: 1" = 400'

APPROXIMATE SUBJECT PROPERTY BOUNDARY

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(ERM, 2006-2013)

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(ERM, 2006-2013) EXCEEDANCES OF THE USEPA
REGION 3 RESIDENTIAL RSLS

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(URBAN GREEN, 2013)

SOIL SAMPLE LOCATIONS PERFORMED BY OTHERS
(URBAN GREEN, 2013) EXCEEDANCES OF THE USEPA
REGION 3 RESIDENTIAL RSLS

SOIL SAMPLE LOCATIONS PERFORMED BY GTA

SOIL SAMPLE LOCATIONS PERFORMED BY GTA
EXCEEDANCES OF THE USEPA REGION 3
RESIDENTIAL RSLS

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

IO' 2O' 3O'

ltu—i

SCALE: 1"=30'

FIGURE
2B

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
VWVW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

SOIL SAMPLE LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 |SCALE: 1" = 30' |DESIGN BY: MDP I REVIEW BY: KPP I FIGURE: 6b

-------
6- t

SHEET KEY MAP

SCALE: 1" = 400'

MATCHLINE (SEE SHEET 1B FOR CONTINUATION)

LEGEND:

«-

EGW-9D

-0-
EGW-10

ACROLEIN 5.3 pg/L

A

GTA-MW-1

A

GTA-MW-1

ACROLEIN 5.3 pg/L

APPROXIMATE SUBJECT PROPERTY BOUNDARY

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
OTHERS (ERM, 2006-2013)

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
OTHERS (ERM, 2006-2013) EXCEEDANCES OF THE USEPA
REGION 3 TAPWATER RSLS COMPARISON VALUES

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
GTA (DECEMBER 18 - 20, 2014)

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
GTA (DECEMBER 18 - 20, 2014) EXCEEDANCES OF THE
USEPA REGION 3 TAPWATER RSLS COMPARISON VALUES

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

IO' 2O' 3O'

NOTES:

1.	BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

2.	PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

3.	REFER TO THE AGGREGATE VOC AND SVOC GROUNDWATER CHARACTERIZATION
SUMMARY TABLE (TABLE 6) AND THE METALS GROUNDWATER CHARACTERIZATION
SUMMARY TABLE {TABLE 7) FOR COMPLETE GROUNDWATER DATA SUMMARY.

4.	GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

UU—I

SCALE: 1"=30'

FIGURE

3A

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

GROUNDWATER SAMPLE
LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 I SCALE:

IDESIGN BY: MDP IREVIEW BY: KPP I FIGURE: 7a

-------
MATCHLINE (SEE SHEET 1A FOR CONTINUATION)

LEGEND:

EGW-9D

¦0"
EGW-10

ACROLEIN 5.3 pg/L

A

GTA-MW-1

A

GTA-MW-1

ACROLEN 5.3 pg/L

SHEET KEY MAP

SCALE: 1" = 400'

APPROXIMATE SUBJECT PROPERTY BOUNDARY

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
OTHERS (ERM, 2006-2013)

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
OTHERS (ERM, 2006-2013) EXCEEDANCES OF THE USEPA
REGION 3 TAPWATER RSLS COMPARISON VALUES

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
GTA (DECEMBER 18-20, 2014)

GROUNDWATER SAMPLE LOCATIONS PERFORMED BY
GTA (DECEMBER 18 - 20, 2014) EXCEEDANCES OF THE
USEPA REGION 3 TAPWATER RSLS COMPARISON VALUES

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS IDENTIFIED
DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

IO' 2O' 3O'

NOTES:

1.	BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

2.	PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

3.	REFER TO THE AGGREGATE VOC AND SVOC GROUNDWATER CHARACTERIZATION
SUMMARY TABLE (TABLE 6) AND THE METALS GROUNDWATER CHARACTERIZATION
SUMMARY TABLE {TABLE 7) FOR COMPLETE GROUNDWATER DATA SUMMARY.

4.	GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

UU—I

SCALE: 1"=30'

FIGURE
3B

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

GROUNDWATER SAMPLE
LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 I SCALE:

IDESIGN BY: MDP IREVIEW BY: KPP I FIGURE: 7b

-------
SHEET KEY MAP

SCALE: 1" = 400'

6- t

MATCHLINE (SEE SHEET 3B FOR CONTINUATION)

LEGEND:

&

ESG-6

ACROLEIN 5.3 pg/m"

GTA-SV-1

APPROXIMATE SUBJECT PROPERTY BOUNDARY

ERM SOIL VAPOR SAMPLE LOCATIONS PERFORMED
BY OTHERS (ERM, 2006-2013) EXCEEDANCES OF THE
RESIDENTIAL COMPARISON VALUES FOR TIER I SOIL
VAPOR

PROPOSED GTA SOIL VAPOR SAMPLE
LOCATIONS (TO BE PERFORMED DURING RAP)

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

NOTES:

1.	BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

2.	PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

3.	REFER TO THE SOIL VAPOR CHARACTERIZATION SUMMARY TABLE (TABLE 8) FOR
COMPLETE SOIL VAPOR DATA SUMMARY.

4.	GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

FIGURE
4A

O' IO' 2O' 3O'

UU—I

SCALE: 1"=30'

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

SOIL VAPOR SAMPLE
LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 ISCALE: 1" = 30' I DESIGN BY: MDP I REVIEW BY: KPP I FIGURE: 8a

-------
MATCHLINE (SEE SHEET 3A FOR CONTINUATION)

LEGEND:

0

ESG-6

ACROLEIN 5.3 pg/m3

GTA-SV-1

NOTES:

1.	BASED ON PLANS PROVIDED BY MORRIS & RITCHIE ASSOCIATES, INC. (MRA), SAMPLE
LOCATION PLANS PREPARED BY OTHERS, AND SITE OBSERVATIONS.

2.	PROPERTY BOUNDARIES AND SITE FEATURES ARE APPROXIMATE.

3.	REFER TO THE SOIL VAPOR CHARACTERIZATION SUMMARY TABLE (TABLE 8) FOR
COMPLETE SOIL VAPOR DATA SUMMARY.

4.	GTA'S SAMPLE LOCATIONS WERE SELECTED AND STAKED IN THE FIELD BY GTA USING
A HANDHELD GPS UNIT. GTA'S SAMPLE LOCATIONS SHOULD BE CONSIDERED
ACCURATE ONLY TO THE DEGREE IMPLIED BY THE METHOD USED.

SHEET KEY MAP

SCALE: 1" = 400'

APPROXIMATE SUBJECT PROPERTY BOUNDARY

ERM SOIL VAPOR SAMPLE LOCATIONS PERFORMED
BY OTHERS (ERM, 2006-2013) EXCEEDANCES OF THE
RESIDENTIAL COMPARISON VALUES FOR TIER I SOIL
VAPOR

PROPOSED GTA SOIL VAPOR SAMPLE
LOCATIONS (TO BE PERFORMED DURING RAP)

APPROXIMATE EXTENT OF CRYSTAL HILL

APPROXIMATE EXTENT OF VOC IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

APPROXIMATE EXTENT OF METHANE IMPACTS
IDENTIFIED DURING PRIOR EVALUATIONS

USTS REPORTEDLY CLOSED IN PLACE:

1	- 500-GALLON #2 OIL

2	- 500-GALLON #2 OIL

3	- 12,000-GALLON #2 OIL

4	- 12,000-GALLON #2 OIL
5- 12,000-GALLON #2 OIL

USTS REPORTEDLY REMOVED:

6	- 1,000-GALLON DIESEL FUEL

7	- 500-GALLON GASOLINE

8	- #2 OIL, UNKNOWN CAPACITY

O' IO' 2O' 3O'

UU—I

SCALE: 1"=30'

FIGURE
4B

GEO-TECHNOLOGY ASSOCIATES, INC.

GEOTECHNICAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 OR (301) 470-4470
FAX: (410) 792-7395
WWW.GTAENG.COM
© GEO-TECHNOLOGY ASSOCIATES, INC.

5601 EASTERN AVENUE

BALTIMORE CITY, MARYLAND

SOIL VAPOR SAMPLE
LOCATION PLAN

PROJECT: 140080 I DATE: OCTOBER 2015 ISCALE: 1" = 30' I DESIGN BY: MDP I REVIEW BY: KPP I FIGURE:

-------
-!

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\

Legend

Hardscape Cap
[7yj Building Cap

Landscape Cap

I

\



n

I

\

Identification of Mixed
Use Parcel

Identification of the Remainder
of the Overall Property

/

\

/

CIS

Approximate
Area Remaining
to be Capped

/

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100

Approximate Scale
1 inch = 100 feet

1 ? - ¦ " [IJJ ,	

~ LJ_ u o 4 ' I
C W C

V v \	\r	— -

GEO-TECHNOLOGY ASSOCIATES, INC.
GEOTECHMCAL AND ENVIRONMENTAL CONSULTANTS

14280 PARK CENTER DRIVE, SUITE A
LAUREL, MARYLAND 20707
(410) 792-9446 or (301) 4704470
FAX: (410) 792-7395
www.gtaeng.com
© Geo-Technoiogy Associates, Inc.

YARD 56 (Formerly PEMCO Corporation)
BALTIMORE CITY, MARYLAND

CAPPING DIAGRAM

PROJECT: 140080x5 | DATE: February 2024 |SCALE: 1" - 100' | DESIGN BY: BRS | REVIEW BY: KPP | FIGURE: 5

-------
Attachment B

-------
Whiteford, Taylor & Preston l.l.p.

M. Trent Zivkovich
Partner
Direct Line (410) 347-8778
Direct Fax (410) 223-4176
TZivkovich@wtplaw.com

Seven Saint Paul Street
Baltimore, Maryland 21202-1636

Main Telephone (410) 347-8700
Facsimile (410) 752-7092

July 15, 2024

DELAWARE*
DISTRICT OF COLUMBIA
KENTUCKY
MARYLAND
MICHIGAN
NEW YORK
PENNSYLVANIA
VIRGINIA

WWW. WTPLAW. COM
(800) 987-8705

Via email only to kimak.christine@epa.gov

Christine Kimak, Project Manager
Corrective Action Program

U.S. Environmental Protection Agency, Mid-Atlantic Region
Mail Code 3LD11,4 Penn Center
1600 John F. Kennedy Boulevard
Philadelphia, PA 19103

Re: Comments to Statement of Basis

Yard 56 (Formerly PEMCO Corporation)

Baltimore, Maryland
EPA ID No. MDD0003093499
Published Date: June 13, 2024

Dear Ms. Kimak:

I'm writing to follow up on our conversation of July 11th and to provide written
comment to the above-referenced Statement of Basis ("SB") on behalf of my clients TRP-
MCB 5601 Eastern LLC, MCB Y56 Retail LLC, MCB Y56 Road LLC, MCB Y56 Office
LLC, MCB Y56 Office 2 LLC, MCB Y56 Mixed Use LLC, MCB Y56 Lot 27B LLC, and
MCB 5801 Eastern LLC (collectively, "MCB"), the "inculpable" past and current owners
of the above-referenced facility (the "Facility"). We appreciate the opportunity to
provide our thoughts and to continue our cooperative effort with both the U.S.
Environmental Protection Agency ("EPA") and the Maryland Department of the
Environment ("MDE") to redevelop the Facility and return it to use in a manner that
protects and benefits its neighbors and the entire surrounding community.

Please find enclosed with this letter a .pdf copy of the EPA's SB, with suggested
edits shown that represent MCB's specific comments to the document. As you will see,
the majority of comments are provided to address the following:

*Whiteford, Taylor & Preston L.L.P. is a limited liability partnership. Our Delaware offices are operated under a separate Delaware limited liability company, Whiteford, Taylor & Preston L.L.C.

-------
Christine Kimak, EPA Mid-Atlantic Region
July 15, 2024
Page 2

a.)	how the Facility has been subdivided, how it is currently owned, and how it has
been redeveloped by MCB under the supervision of the MDE and EPA;

b.)	how this SB in intended to apply to the entire Facility and effectively supersedes
the September 2020 Record of Decision and Response to Comments issued by
EPA for Lots 27C and 28 at the Facility;

c.)	clarifying how MCB's efforts already completed on each of the Lots across the
Facility have been consistent with the Response Action Plan and the EPA's
selected remedy, as presented in the SB; and

d.)	reflect MCB's general agreement with the proposed remedy described in the SB
and provides certain corrections to some technical matters.

Per our discussion on the 11th, we look forward to working with you to develop
an appropriate and reasonable groundwater monitoring plan that satisfies EPA's
policies, while recognizing that the use of groundwater in the area around the Facility is
not permitted by the City and State.

On behalf of MCB, thank you for your continuing assistance with the project and
please don't hesitate to contact our team should you have any questions or concerns.

Sincerely,

M. Trent Zivkovich

Enclosure: MCB Comments to Proposed Draft Statement of Basis
Document, July 15, 2024

cc: Barbara Brocks, Maryland Department of the Environment
Jaime Lee, MCB Real Estate, LLC
Joshua Nieman, MCB Real Estate, LLC
Kevin Plocek, Geo-Technology Associates, LLC

13609971

-------
•9	m\

"

UNITED STATES
ENVIRONMENTAL PROTECTION AGENCY
REGION 3

STATEMENT OF BASIS

Yard 56 (Formerly PEMCO Corporation)
Baltimore, MD

EPA ID NO. MDD003093499

Prepared by

RCRA Corrective Action Section West
Land, Chemicals and Redevelopment Division

May 2024

-------
e of Contents

Section 1: Introduction	1

Section 2: Facility Background	2

Section 3: Conceptual Site Model	3

Section 4: Summary of Environmental Investigations	4

Section 5: Human Health Risk Assessment	11

Section 6: Corrective Action Objectives	12

Section 7: Proposed Remedy	13

Section 8: Evaluation of Proposed Remedy	16

Section 9: Financial Assurance	20

Section 10: Public Participation	21

Section 11: Signature	21

Section 12: Index to Administrative Record	22

Section 13: Attachments	22

List of Acronyms

amsl	Above mean sea level

AR	Administrative Record

bgs	Below ground surface

CAO	Corrective Action Objective

EC	Environmental Covenant

EJ	Environmental Justice

EPA	Environmental Protection Agency

ERM	Environmental Resources Management

GTA	Geo-Technology Associates, Inc.

HHRA	Human Health Risk Assessment

HSWA	Hazardous and Solid Waste Amendments

IC	Institutional Control

MCL	Maximum Contaminant Level

MDE	Maryland Department of the Environment

O&M	Operations and Maintenance

PAH	Polycyclic Aromatic Hydrocarbon

-------
PCB

Polychlorinated Biphenyl

PCE

Tetrachloroethene

PEMCO

Porcelain Enamel Manufacturing Company

PID

Photoionization Detector

RAP

Response Action Plan

RCRA

Resource Conservation and Recovery Act

RSL

Regional Screening Level

SB

Statement of Basis

SSI

Supplemental Site Investigation

SVOC

Semi-Volatile Organic Compound

TCE

Trichloroethene

UST

Underground Storage Tank

VCP

Voluntary Cleanup Program

VOC

Volatile Organic Compound

-------
Section 1: Introduction

The United States Environmental Protection Agency (EPA) has prepared this Statement of
Basis (SB) to solicit public comment on its proposed remedy for Yard 56 located at 5601
Eastern Avenue, Baltimore, Baltimore County, Maryland (Facility).

The EPA's proposed remedy in this SB consists of the implementation of engineering
controls, monitored natural attenuation of groundwater, land and groundwater use
restrictions implemented through enforceable Institutional Controls such as an order
and/or an Environmental Covenant to control exposure to contaminated soil and
groundwater, and long-term groundwater monitoring. This SB highlights key information
relied upon by the EPA in proposing its remedy. Note that because it applies to the entire
Facility, this SB effectively supersedes that certain Final Decision and Response to
Comments, issued by the EPA in September 2020 for Lots 27C and 28 of the Facility.

The Facility is subject to the EPA's Corrective Action Program under the Solid Waste
Disposal Act, as amended by the Resource Conservation and Recovery Act (RCRA) of 1976,
and the Hazardous and Solid Waste Amendments (HSWA) of 1984, 42 U.S.C. §§ 6901 et seq.
The Corrective Action Program requires that owners and/or operators of facilities subject to
certain provisions of RCRA investigate and address releases of hazardous waste and
hazardous constituents, usually in the form of soil or groundwater contamination, that have
occurred at or from their property. Environmental Justice (EJ) and Climate Adaptation
information were considered during the RCRA Corrective Action decision-making process;
this Facility is not considered a concern for EJ or Climate Adaptation.

The EPA is providing a thirty (30) day public comment period on the EPA's proposed remedy
described in this SB. The EPA will evaluate comments received after the public comment
period has ended and may modify its proposed remedy based on such comments. If the
final remedy is substantially unchanged from the one proposed, the EPA will issue a Final
Decision and inform all persons who submitted written comments or requested notice of
the EPA's final determination. If the final remedy is significantly different from the one
proposed, the EPA will issue a public notice explaining the new remedy and will reopen the
comment period. The EPA will respond in writing to all relevant comments received during
the comment period.

Information on the Corrective Action program and the Government Performance and
Results Act Environmental Indicator Determinations for the Facility can be found by
navigating to_https://www.epa.gov/hwcorrectiveactioncleanups/hazardous-waste-cleanup-
yard-56-formerly-pemco-corporation-baltimore^

The EPA has compiled an Administrative Record (AR) containing all documents, including
data and quality assurance information, upon which EPA's proposed remedy is based. See

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 1

-------
Section 10, Public Participation, below, for information on how you may review the AR.

Section 2: Facility Background

The Facility comprises approximately 19.9720.02 acres of land located south of Eastern
Avenue and east of South Umbra Street, in the eastern portion of the City of Baltimore,
Maryland (Figure 1). The Facility is bordered by Eastern Avenue to the north, Interstate 95
to the south, commercial properties to the east, and residences to the west. In general,
land uses in the vicinity of the Facility consist of residential and commercial development, a
medical campus, interstate highway corridors, and open fields.

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 2

-------
as Crystal Hill) on the southern and western portions of the Facility. The landfill was capped
with 6 to 8 feet of clay loam and closed in 1979.

The Facility was originally owned and operated by PEMCO Corporation. The PEMCO name
has boonwas retained throughout the Facility's ODGrationperiod of industrial operations. In
1955, the PEMCO plant was sold to Glidden-Durkee Corporation, which became a division of
the SCM Corporation (formerly Smith-Corona Company) in 1967. In 1980, the PEMCO
Facility was sold to Mobay Chemical Corporation. In 1992, Mobay Chemical Corporation
sold the Facility to Miles Inc. In 1995, Miles Inc. sold the facility to Bayer Corporation and in
October 1997, the Facility was transferred to the PEMCO Holding Corporation. The Facility
wasceased all industrial operations and was shut down in 2007.The Facility was then
acquired by current owner TRP-MCB 5601 Easternr LLC (TRP-MCB). from PEMCO Holding
Corporation in 2014— with the intention of demolishing the former industrial structures and
redeveloping the underlying real property.

The Maryland Department of the Environment (MDE) received an application from TRP-
MCB 5601 Eastern LLC for its Voluntary Cleanup Program (VCP) on September 29, 2014.
MDE accepted the Facility into the VCP on August 12, 2015. The Facility has recently
undergone redevelopment consistent with the remedy elements described in the MDE-
approvedTRP-MCB then completed a Response Action Plan (RAP) for the Facility, pursuant
to the requirements of the MDE's VCP. The RAP detailed the remedy elements to address
impacted soil, soil vapor, and groundwater contamination within the Facility boundaries in
conjunction with the Facility redevelopment. Portions of the Facility have boon
rodovolopod into aFollowing a review and receipt of comments from both MDE and EPA
and subsequent revisions, a RAP that contemplated the redevelopment of the Facility for
residential apartment building, retail spaces, and office spaces, commercial uses was
approved by MDE on May 5. 2016.1

In March 2018, TRP MCB 5601 Eastern, LLC kf ( | I i ' | (t jC i i ! a.rtgl.

6€mstw=ie tMt4es-at-fee-Paeil-fty— Construction and capping activities (including
placement of buildings, hardscaped areas, landscaped areas, and vapor intrusion controls in
buildings) have been substantially completed.

An affiliate of TRP-MCB acquired an adjacent property (5801 Eastern Avenue. 0.62 acres)
not historically part of the Facility and thus not subject to EPA RCRA oversight. On
November 11. 2018. TRP-MCB acquired 5801 Eastern Avenue and that same dav.

1 While the EPA retains oversight authority and jurisdiction for Corrective Action under Section 3006 of RCRA.
the entire Facility is also overseen by the MDE under its Voluntary Cleanup Program. As such, the Facility
investigation and remedial actions described herein have been cooperatively overseen by both the EPA and
the VCP. The MDE-approved RAP is considered by EPA to have satisfied the RCRA Corrective Action
requirements for a Corrective Measures Study (CMS).

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 3

-------
subdivided 5801 Eastern Avenue and the real property that historically comprised the
Facility, creatine five (5) new, separate real property Lots. Each of these Lots was
subsequently transferred bv TRP-MCB to five (5) separate affiliated entities, but not before
each entity applied to and was granted "inculpable person" status bv the MDE. Following
the submission of applications bv each of the new property owners, the MDE accepted each
new Owner and its Lot into the VCP on April 3. 2019. After a subsequent Amendment to the
Subdivision Plat was recorded on April 16. 2021. and subsequent amendments filed with the
VCP to ensure continuity, the owners and each of the Lots that currently comprise the
former Facility are as follows:

Lot

Acreage

Property Owner

Existing/Planned Use

Current
Redevelopment
Status per RAP

4.223

MCB Y56 Mixed Use LLC

Existing Residential

apartments &
commercial (retail)

Complete

27B

5.473

MCB Y56 Lot 27B LLC

Proposed Commercial

Not yet
redeveloped

27C

1.053

MCB Y56 Road LLC

Existing Roadway

Complete

27D

1.091

MCB Y56 Office 2 LLC

Existing Commercial
(offices & retail)

Complete

7.197

MCB Y56 Retail LLC

Existing Commercial
(retail)

Complete

29/49/50

1.602*

MCB 5801 Eastern LLC

Existing Commercial
(service station)

Complete

Note: 0.62 acres of this Lot was not historically part of the Facility and. as such, is not subject to
RCRA Correction Action requirements. However, the entire Lot is enrolled in the MDE's Voluntary
Cleanup Program.

Each of TRP-MCB. MCB Y56 Retail LLC. MCB Y56 Road LLC. MCB Y56 Office LLC. MCB Y56
Office 2 LLC. MCB Y56 Mixed Use LLC. MCB Y56 Lot 27B LLC, and MCB 5801 Eastern LLC.
collectively the prior and current owners of the real property that constitutes the Facility
since its acquisition bv TRP-MCB in 2014. are collectively referred to herein as "MCB".

Since the approval of its RAP in 2016 and subsequent completion of all planning and
permitting requirements, the Facility has largely been redeveloped bv MCB in two separate
phases, respectively known as "Phase I" and "Phase II." In March 2018. TRP-MCB began

demolition of existing buildings and construction activities at the Facility. Phase I involved

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 4

-------
the redevelopment of Lot 27C (the "Road" parcel). Lot 28 (the "Retail" parcel), and Lot
29/49/50 (5801 Eastern- the gas station parcel) and was completed in late 2020. MCB's
redevelopment process completed for these Lots and the construction of all improvements
was consistent with the remedy elements described in the MDE-approved RAP. The MDE
issued a "Certificate of Completion" (COC) for Lots 27C and 28 and a "No Further
Requirements Determination" (NFRD) for Lot 29/49/50 in December 2020.

Phase II of the Facility's redevelopment began in the fall of 2020 involving Lot 27 (the
"Mixed Use" parcel) and Lot 27D (the "Medical Office Building" parcel), and was completed
in May 2024 when the MDE issued a COC for both Lots. Likewise. MCB's redevelopment
process completed for these Lots and the construction of all improvements was consistent
with the remedy elements described in the MDE-approved RAP.

While the redevelopment of Lot 27B has vet to be completed, all grading and related
groundwork on the real property has been completed. Any final use and design of any
structure and improvements on the Lot shall be consistent with and comply with the
requirements of the RAP and this SB.

With the pending completion of Phase I of the Facility's redevelopment in 2020. EPA
developed and issued a Final Decision and Response to Comments in September 2020 solely
for Lots 27C and 28 of the Facility (FDRTC). This SB provides a remedy that is consistent
with the 2020 FDRTC but is intended to apply to the entire Facility, not simply Lots 27C and
28. As such, this SB (once finalized and issued as a Final Decision) is intended to supersede
the 2020 FDRTC with regards to Lots 27C and 28.

Section 3: Conceptual Site Model

Topography

Surficial drainage in the site vicinity is collected by Gorsuch Creek and is directed toward the
south and southwest.

Geology

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 5

-------
The Facility is within the Coastal Plain Physiographic Province of the Lower Cretaceous Age.
The Coastal Plain is characterized by undifferentiated and interlayered sedimentary
deposits derived from eroded and transported rock formations to the north and west.
Coastal Plain sediments were deposited in a marine and alluvial environment during periods
of fluctuating sea levels. More specifically, the Facility is shown to be underlain by the
Patapsco Formation and Artificial Fills. The southwestern portion of the Facility is mapped
within Artificial Fills. These materials are described as a heterogeneous mixture of materials
such as rock, unconsolidated sediment, slag, refuse, and dredge spoil. The central and
northern portions of the Facility are mapped within the clay facies of the Patapsco
Formation. The clay facies consist of buff, red-yellow, and brown mottled kaolinitic clays
with variable amounts of quartz sand and silt, present as pods and interbeds throughout the
clay. The northeastern portion of the Facility is underlain by the sand facies of the Patapsco
Formation. These soils consist of well-sorted medium to fine grained quartz sand with
locally abundant quartz gravel and clay clasts.

Hydrogeology

Hydrologically, the Coastal Plain is underlain by both unconfined and confined aquifers of
unconsolidated sediments, which overlie consolidated bedrock and dip toward the
southeast.

Section 4: Summary of Environmental Investigations

A. Historical Investigations

B. 2006/2007 Site Characterization

Statement of Basis

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PEMCO kas-performed investigations of environmental conditions at the Facility jointly
under EPA's Facility Lead Program and Maryland's Voluntary Cleanup Program (VCP-). The
work has been performed in accordance with the Site Characterization Work Plan dated
December 6, 2006 (ERM 2006), which was prepared by Environmental Resources
Management, Inc. (ERM) on behalf of PEMCO. EPA approved the Work Plan in January
2007. ERM has also undertaken several focused studies, approved by EPA and MDE, that
augment the Work Plan. The results of the site characterization have been documented and
submitted to EPA and MDE in a January 2011 report titled Site Characterization and Risk
Assessment Report (ERM 2011). The Facility characterization included the following:
installation of 92 soil borings, installation of 14 monitoring wells, collection of soil and
groundwater samples, installation of 32 soil gas probes, five rounds of landfill gas field
screening, and a methane extraction and recovery test.

Soil results were compared to the EPA Regional Screening Levels (RSLs). Arsenic was the
most prevalent metal detected in soil at levels above its RSL. Arsenic concentrations ranged
from non-detect to 74 mg/kg, the highest concentration found at sample location ESB-27.
The only other metals that were detected in at least one soil sample at a concentration
above its respective RSL were cobalt and iron. Cobalt was detected in fivesix soil samples
and concentrations ranged from 26 mg/kg to 95 mg/kg. These sample locations were below
or next to the former manufacturing building at sample locations ESB-8, ESB-27, ESB-30,
ESB-31, and ESB-56 or within the landfill at sample location ESB-45. Iron was detected at
100,000 mg/kg at sample location ESB-31, which is located adjacent to the southern side of
the former main manufacturing building. Tetrachloroethene (PCE), trichloroethene (TCE),
hexachloroethane, and polycyclic aromatic hydrocarbons (PAHs) exceeded their respective
RSLs primarily in the vicinity of the landfill and south of the manufacturing complex.

The soil gas results indicated that a high concentration of VOCs, predominantly PCE and
TCE, in soil gas is present in the landfill near monitoring wells EGW-10 and EGW-10D.

Several of the soil gas sample points detected methane at concentrations ranging from 26.9
to 99.9 percent by volume.

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February 2013, monitoring well EGW-12 was installed at the western Facility property
boundary. EGW-12 was installed to a depth of 61 feet bgs and ground water was
encountered at 49 feet bgs. The groundwater samples from EGW-10 contained PCE above
its MCL of 5 ug/L (970 |-ig/L), TCE above its MCL of 5 ug/L (270 |-ig/L), cis-l,2-dichloroethene
above its MCL of 70 ugl (570 ug/L), and carbon tetrachloride above its MCL of of 5 ug/L (21
Ug/L). Chloroform was also detected at EGW-10 at concentrations of less than 10 |ag/L but
above its tap water RSL of 0.190 ug/L. Initial groundwater samples from EGW-10D, EGW-
9D, and EGW-11 indicated that there were no exceedances of the MCLs for any VOCs.
Carbon tetrachloride (7.7 |ag/L) and PCE (12 |ag/L) exceeded their MCLs (5 |ag/L for both) at
EGW-12. Monitoring well EGW-12 is located west of EGW-10 and concentrations were
significantly lower in EGW-12 than EGW-10.

C. 2014 Supplemental Characterization

A supplemental site characterization was conducted in 2014 by Geo-Technology Associates,
Inc. (GTA) on behalf of TRP-MCB 5601 Eastern, LLC. Activities included soil, groundwater,
soil vapor, and methane sampling and field screening. Forty-five borings (GTA-SB-1 through
GTA-SB-45) were performed for soil sampling and analysis, and 16 borings (GTA-SV-1
through GTA-SV-16) were advanced for the installation of soil vapor probes. Twenty-two
borings were performed to evaluate the depth of fill material in the landfill or for
installation of methane monitoring probes. Monitoring wells GTA-MW-1 through GTA-MW-
5 were also installed as part of this site characterization.

VOCs did not exceed the EPA RSLs in any of the soil samples analyzed. For SVOCs,
benzo(a)anthracene (RSL of 1.1 mg/kg), benzo(a)pyrene (RSL of 0.11 mg/kg),
benzo(b)fluoranthene (RSL of 1.1 mg/kg), dibenz(a,h)anthracene (RSL of 0.11 mg/kg), and
indeno(l,2,3-cd)pyrene (RSL of 1.1 mg/kg) exceeded their respective RSLs in both surface
and subsurface soil. In surface soil, concentrations ranged from non-detect to 2.6 mg/kg for
benzo(a)anthracene, non-detect to 2.2 mg/kg for benzo(a)pyrene, non-detect to 2.4 mg/kg
for benzo(b)fluoranthene, non-detect to 0.44 mg/kg for dibenz(a,h)anthracene, and non-
detect to 1.2 mg/kg for indeno(l,2,3-cd)pyrene. In subsurface soil, concentrations ranged
from non-detect to 5.8 mg/kg for benzo(a)anthracene, non-detect to 5.0 mg/kg for
benzo(a)pyrene, non-detect to 4.4 mg/kg for benzo(b)fluoranthene, non-detect to 1.1
mg/kg for dibenz(a,h)anthracene, and non-detect to 2.6 mg/kg for indeno(l,2,3-cd)pyrene.
The following metals exceeded their respective RSLs in surface and subsurface soil:

•	Antimony (RSL of 31 mg/kg): concentrations ranging from non-detect to 330 mg/kg

•	Arsenic (RSL of 0.68 mg/kg): concentrations ranging from non-detect to 27 mg/kg

•	Cadmium (RSL of 71 mg/kg): concentrations ranging from non-detect to 2,300 mg/kg

•	Cobalt (RSL of 23 mg/kg): concentrations ranging from non-detect to 190 mg/kg

•	Iron (RSL of 55,000 mg/kg): concentrations ranging from 6,700 to 110,000 mg/kg

•	Lead (RSL of 400 mg/kg) with concentrations ranging from 3.2 to 22,000 mg/kg.
Statement of Basis

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Groundwater samples were collected from newly installed monitoring wells GTA-MW-1
through GTA-MW- 5 as well as monitoring wells EGW-9D, EGW-10, and EGW-12. For
SVOCs:

•	Hexachloroethane exceeded the RSL of 0.33 |ag/L in monitoring wells GTA-MW-3,
GTA-MW-5, and EGW-10 with concentrations ranging from 11 to 670 |ag/L (GTA-
MW-5).

•	Naphthalene exceeded the RSL of 0.17 |ag/L in GTA-MW-5 (29 |-ig/L).

•	Bis(2-ethylhexyl)phthalate exceeded the MCL of 6 |ag/L in GTA-MW-4 (9.5 |-ig/L).

ForVOCs:

•	1,1,2,2-tetrachloroethane exceeded the RSL of 0.076 |ag/L in GTA-MW-5 (1.5 |ag/L)
and EGW-10 (1.4 |ag/L).

•	1,1-Dichloroethene exceeded the MCL of 7 |ag/L in GTA-MW-5 (14 |ag/L) and EGW-10
(12 M-g/L).

•	Carbon tetrachloride exceeded the MCL of 5 |ag/L in GTA-MW-2 through GTA-MW-5,
EGW-10, and EGW-12 with concentrations ranging from 5v410 to 290 |-ig/L.

•	Chloroform exceeded the MCL of 80 |ag/L in GTA-MW-2 (190 |ag/L).

•	PCE exceeded the MCL of 5 |ag/L in GTA-MW-1 through GTA-MW-5, EGW-10, and
EGW-12 with concentrations ranging from 14 to 28,000 |ag/L (GTA-MW-5).

•	TCE exceeded the MCL of 5 |ag/L in GTA-MW-2, GTA-MW-3, GTA-MW-5, and EGW-10
with concentrations ranging from 5.7 to 3,400 |ag/L (GTA-MW-5).

•	Vinyl chloride exceeded the MCL of 2 |ag/L in GTA-MW-5 (38 |ag/L) and EGW-10 (4.7
Hg/L).

•	cis-l,2-Dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5 (12,000 |ag/L)
and EGW-10 (11,000 |ag/L).

•	trans-l,2-Dichloroethene exceeded the MCL of 100 |ag/L in GTA-MW-5 (310 |ag/L)
and EGW-10 (290 |ag/L).

For dissolved metals:

•	Antimony exceeded the MCL of 6 |ag/L in GTA-MW-5 (17 |-ig/L).

•	Cobalt exceeded the RSL of 6 |ag/L in GTA-MW-1 through GTA-MW-5 with
concentrations ranging from 20 to 65 |-ig/L.

•	Iron exceeded the RSL of 14,000 |ag/L in GTA-MW-4 (15,000 |ag/L) and GTA-MW-5
(18,000 M-g/L).

•	Lead exceeded the MCL of 15 |ag/L in GTA-MW-5 (1,400 |ag/L).

•	Manganese exceeded the RSL of 430 |ag/L in GTA-MW-1 (1,400 |ag/L) and GTA-MW-2
(540 M-g/L).

•	Sodium exceeded the MCL of 1,000 |ag/L in all monitoring wells with concentrations
ranging from 21,000 to 670,000 |-ig/L.

Statement of Basis

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• Total chromium exceeded the MCL of 100 |ag/L in GTA-MW-4 (320 |-ig/L).

VOCs (carbon tetrachloride, chloroform, PCE, 1,1,2-trichloroethane, TCE, and vinyl chloride)
were detected in soil vapor beneath the Facility above their MDE Tier 1 Values. Carbon
tetrachloride (MDE Tier 1 of 94 |-ig/m3) was found at concentrations ranging from non-
detect to 7,600 |ag/m3. Chloroform (MDE Tier 1 of 24 |-ig/m3) was found at concentrations
ranging from non-detect to 2,300 |ag/m3. PCE (MDE Tier 1 of 840 |-ig/m3) was found at
concentrations ranging from non-detect to 380,000 |ag/m3. TCE (MDE Tier 1 of 42 |-ig/m3)
was found at concentrations ranging from non-detect to 23,000 |ag/m3. 1,1,2-
Trichloroethane (MDE Tier 1 of 4.2 |-ig/m3) was found at concentrations ranging from non-
detect to 5-r36.5 |-ig/m3. Methane was detected in the central portion of the former landfill
known as Crystal Hill as high as 61.7% by volume.

D. Supplemental Investigations

As part of the RAP, several supplemental site investigations were performed at the Facility,
as summarized below.

In March 2018, TRP-MCB 5601 Eastern, LLC installed six additional soil vapor points to
further evaluate impacts surrounding soil vapor sampling location GTA-SV-5. PCE and TCE
were detected above the screening levels, with PCE concentrations ranging from 3.4 to
3,600 |ag/m3 and TCE concentrations ranging from non-detect to 150 |ag/m3. Impacts are
primarily located beneath the location of the former Warehouse and Main Manufacturing
Building.

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contained exceedances of the MCLs and/or Tapwater RSLs for VOCs, SVOCs, and TAL
metals. 1.1-DichlorocthancDichloroethene was detected above the MCL of 7 |ag/L in GTA-
MW-5 (10 |-ig/L) and EGW-10 (13 |ag/L); carbon tetrachloride exceeded the MCL of 5 |ag/L in
each well except GTA-MW-1 with concentrations ranging from 5.4 to 410 |ag/L; chloroform
exceeded the MCL of 80 jig/L in GTA-MW-2 (380); PCE exceeded the MCL in GTA-MW-2
(720 |ag/L), GTA-MW-3 (12 \ig/L), GTA-MW-5 (2,800 \ig/L), EGW-10 (5,100 |ag/L), and EGW-
12 (7.8 |ag/L); TCE exceeded the MCL in GTA-MW-2 (170 |ag/L), GTA-MW-5 (1,500 |ag/L), and
EGW-10 (3,200 |-ig/L); cis-l,2-dichloroethene exceeded the MCL of 70 |ag/L in GTA-MW-5
(4,700 |ag/L) and EGW-10 (13,000 |ag/L); and trans-1,2-dichloroethene exceeded the MCL of
100 |ag/L in GTA-MW-5 (180 |ag/L) and EGW-10 (310 |-ig/L). Dissolved cobalt, sodium, and
lead were also detected above the MCLs and/or Tapwater RSLs. The monitoring wells
installed during the Phase I investigation in 2006 were either abandoned prior to 2014 or
were installed too shallow and did not yield any groundwater.

In November 2019, TRP-MCB 5601 Eastern. LLC conductodGTA initiated an additional
methane evaluation on behalf of MCB. Twenty-one methane probes were installed within
and surrounding the landfill. FourFive rounds of methane screening were conducted
between November 15, 2019 and DocGmbor 18. 2019. and on July 24. 2020Qctober 8. 2021.
The areas where methane was detected corresponded to areas within the landfill, with the
areas of highest methane concentrations (GTA-CMM1 and GT-CMM2) corresponding to an
area of high methane concentrations observed during prior evaluations.

E.	Natural Attenuation

Natural attenuation entails a variety of physical, chemical and/or biological processes that
reduce the mass, toxicity, mobility, volume, or concentration of constituents of concern.
These processes are classified as degradation (biological or chemical), sorption (chemical)
and dispersion, diffusion, dilution, and volatilization (physical).

Although temporal ground water sampling data is limited to multiple sampling events in fall
2009, winter 2010, February 2013, January 2015, and March 20132018. it is reasonable to
interpret the existing ground water data as indicative of attenuating conditions. The
highest detections are of PCE,TCE, and cis-l,2-dichloroethene at the source area in wells
GTA-MW-5 and EGW-10 . PCE, TCE, and cis-l,2-dichloroethene concentrations appear to be
decreasing in monitoring well GTA-MW-5. In addition, detections of cis-l,2-dichloroethene
at GTA-MW-1 through GTA-MW-5 and EGW-10 and detections of vinyl chloride at GTA-MW-
5 and EGW-10, along with PCE and TCE, is indicative of natural biodegradation of PCE. cis-
1,2-Dichloroethene and vinyl chloride are produced through the natural reductive
dechlorination of PCE and TCE.

F.	Interim Measures

Statement of Basis

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Soil sampling conducted byTRP MCB 5601 Eastern, LLC in 2018 bv GTA on behalf of MCB
identified PCB impacts in two areas: (1) an enclosed transformer room within the
northeastern portion of the former warehouse building; and (2) a portion of a concrete
floor slab, adjacent to a former transformer pad, in the west-central portion of the color
mixing building. The transformers were removed sometime in the past, but it is not known
when. In November 2018, PCB-contaminated soil and concrete were delineated in these
areas and placed in roll-off dumpsters for off-site disposal. Approximately 161,000
kilograms or 178164 tons of material were disposed of at an off-site disposal facility.

In 2018. TRP-MCB

Nos. 2-4). two 500-eallon heating oil USTs (identified as UST Nos. 5 and 6). and a 550-eaHom
heating oil UST (identified as UST No. 8) and associated petroleum-impacted soils were
identified and removed. It should be noted that UST Nos. 1 and 7 had been previously
removed from the Facility. A total of 437.04 tons of petroleum impacted soil was removed
ig all excavation activities described above.

During redevelopment activities throughout 2018 and 20192023. petroleum-impacts were
discovered in certain areas of the Facility. ^Between December 2018 and JanuarvMarch
2019, two areas of petroleum-impacted soil were discovered in sewer and storm drain
utility runs located on the southeastern portionand central portions of the Facility. The
petroleum-impacted seUsoils in the southeastern portion of the Facility was observed
approximately 1-foot bgs and consisted of gray clays and silts that exhibited a petroleum
odor. Elevated Photoionization Detector (PID) readings were not observed. Stained soil and
petroleum odors were not observed below 5 feet bgs, where native clays were
encountered. The approximate area of excavated petroleum-impacted soil that was
removed was about 50irregularlv shaped, but approximately 51 feet long, ^018 feet wide,
and 5 feet deep. The petroleum-impacted soil was staged on and covered with plastic
adjacent to the excavation prior to future off-site disposal. No liquids were encountered in
the excavation.

In March 2018. anApril 2019. a second area of petroleum-impacted soil was discovered in a
water line utility run located on the southeasterncentral portion of the Facility, contiguous
to the impacts identified in December 2018 and in January 2019. The petroleum-impacted
soil was observed approximately 1-foot bgs. The soil observations andObserved PID
readings were generally consistent to the area of adjacent impactsraneed between 50 and
100 ppm. Stained soil and petroleum odors were not observed below 3 feet bgs, where
native clays were encountered. The area of excavated petroleum-impacted soil that was
removed measured approximately 4020 feet long, 410 feet wide, and 3 feet deep. The
petroleum-impacted soil was staged on and covered with plastic adjacent to the excavation
prior to future off-site disposal. No liquids were encountered in the excavation.

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In May and June 2019, a third area of petroleum-impacted materials were encountered
during footing excavations. An approximately 75-foot section of petroleum-impacted soil
was discovered in May 2019. In June 2019, two approximately 25-foot sections of
petroleum-impacted soil were discovered north and south of the original 75-foot section.
This material was found approximately 3 feet bgs and consisted of an approximately VA-
foot layer of stone, brick, and concrete mixed with soil (petroleum-impacted material).

In 2018, TRP-MCB 5601 Eastern, LLC Mertlfi 1 i, 1 i i iieved^kfee-STQQO-gaHefHdieseW1 >1
(idefrtified-as-yST^Nesr !©FHheattftg-&iW=JS:l:s-(idefitified-a5-UST^Wesr-5-^«d--^

allefH4*eattftg-eiW51-4Wefttrffed-as-y54-^&leT-8^—It should bo noted that UST Nos.
1 and 7 wore previously removed from the Facility. A total of 343.7 tens-ef-petf&lebi-m

rrtil > ki-\ r /"lit inr»m>inr 11 .<-t i raf' » Q.ia .% ia

TtTTjjcrv.itcts ctsjhin wwtxtc.i tixJwxjurA,3rcifn? ijg on t* alufqtre?i tqlltvttiOTT^crcrs

In December 2023. a fourth area of petroleum-impacted soil was identified along the
western property boundary, in a former parking area adjacently east of the Umbra Street
Alley. The approximate area of excavated petroleum-impacted soil was 15-foot wide, by
450-foot long, and 1 foot deep. The petroleum-impacted soil was directly loaded for off-site
disposal.

In addition, landfill debris that exhibited an unusual odor was encountered within an
approximate 85-foot-long section of sewer utility installation, generally within the central
portion of the landfill. This area generally corresponds to a VOC-impacted area identified
during prior evaluations. The odoriferous materials were generally located beneath
approximately two feet of clay material and consisted of a gray granular material with some
clav mixed with paper and plastic debris. This material was encountered to a depth of
approximately 1VA feet below existing grades, where more granular soil and clavs mixed
with construction debris were encountered. The utility trench generally measured 5 feet
wide, with the upper portions sloped outward for safety. A total of 717.31 tons of VOC- and
lead-impacted soil was removed during the excavation activities described above.

Statement of Basis

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Section 5: Human Health Risk Assessment

• Presuming future redevelopment of the Facility property, exposure of future
building occupants to soil gas via vapor intrusion could result in unacceptable risk to
human health.

• Exposure to soil vapors in a trench within the approximate extent of VOC impacts
(identified on Figure 2A) could result in an elevated carcinogenic risk to the
construction/utility worker.

• Exposure to deep on-site groundwater for non-potable purposes could result in an
elevated carcinogenic and noncarcinogenic risk for industrial workers.

The HHRA also concluded that if the Facility is to be redeveloped either as industrial or
residential, controls would be required to eliminate the unacceptable risks identified above.
The proposed remedy as described in the SB includes these controls. As discussed in the
Migration of Contaminated Groundwater Under Control Environmental Indicator for the
Facility, analytical results from EGW-12 indicate low levels of VOCs are present in
groundwater. The concentrations of carbon tetrachloride (6.8 |ag/L) and PCE (7.8 |ag/L)
detected in EGW-12 are significantly lower than at the center of the property (at EGW-10)
and are likely attributable to mixing of waters beneath the landfill where flow from the west
and east converge at a former stream trace. The risk to off-site receptors west of EGW-12
due to vapor intrusion has been assessed based on the prior ESG-30 and ESG-31 soil gas
results and found to be negligible. ESG-30 and ESG-31 are located near EGW-31 and
benzene in ESG-31 (696J |-ig/m3) was the only constituent that exceeded the MDE Tier 1
value of 72 |ag/m3. VOCs were also non-detect at downgradient monitoring well EGW-9D,
except for PCE at 1.1 ug/L, which is below the MCL of 5 ug/L. These data, along with the soil

Statement of Basis

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gas results collected as part of the site characterization indicate that VOCs are not migrating
towards the property boundary at levels of concern. With the exception of a single
detection, methane has not been detected in anv monitoring point located alone the

perimeter of the Facility.

Section 6: Corrective Action Objectives

The EPA's Corrective Action Objectives (CAOs) are as follows:

1. Soil

The EPA has determined that hazardousreeulated constituents currently remain in
Facility soils above acceptable risk levels protective of human health and the
environment for residential use. Therefore, the EPA's proposed Corrective Action
Objective for Facility soils is to control exposure to the hazardous constituents
remaining in surface soils by requiring compliance with and maintenance of
engineering controls and land use restrictions.

2. Groundwater

The EPA expects final remedies to return usable groundwater to its maximum
beneficial use, where practicable, within a timeframe that is reasonable. For
projects where aquifers are either currently used for water supply or have the
potential to be used for water supply, EPA will use the National Primary Drinking
Water Standard MCLs promulgated pursuant to Section 42 U.S.C. §§ 300f et seq. of
the Safe Drinking Water Act and codified at 40 C.F.R. Part 141. EPA's Corrective
Action Objectives for Facility groundwater are 1) to restore the groundwater to
drinking water standards, otherwise known as MCLs, or to the relevant RSL for tap
water for contaminants that do not have an MCL and, 2) until such time as drinking
water standards are restored, to control exposure to the hazardous constituents
remaining in the groundwater by requiring the continued implementation of the
groundwater monitoring program and compliance with and maintenance of
groundwater use restrictions.

Municipal water is available and supplied bv the Citv of Baltimore throughout the
entire area surrounding the Facility. There are no known users of groundwater in
the surrounding area, and other that environmental monitoring wells, no wells
installed on or in the area surrounding the Facility. State of Maryland Well
Construction Regulations, codified at Code of Maryland Regulations 26.03.01.05.
prohibit installation of individual water systems where adequate public systems are
available. Moreover. Section 317.1 of Baltimore City's Building Code requires the
connection of anv building's water distribution system in which plumbing fixtures

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are installed to a public water suppIv system unless otherwise authorized bv the
State.

3. Soil Vapor

The EPA's CAO for soil vapor at the Facility is to control human exposure to
contaminated subsurface vapor in buildings/structures so that indoor air quality
within any such buildings/structures is protective of human health for current and
anticipated future uses.

Section 7: Proposed Remedy

The EPA's proposed remedy for all environmental media is as follows:

1. Soil

The EPA's proposed remedy for Facility soil is to install and maintain a cover system
on the entire Facility (hardscaped or landscaped cap with marker fabric above the
contaminated soil) that controls, minimizes, or eliminates post remedial action
migration of hazardous waste, hazardous constituents, leachate, contaminated run-
off, or hazardous waste decomposition products to the ground or surface waters or
to the atmosphere, to the extent necessary to protect human health and the
environment. The remaining area of the Facility to bo capped (Figure 5) includes a
small portion undergoing rodovolopmont (the rest of the Facility has already boon
capped). The cap shall be designed and constructed to prevent infiltration to
mitigate potential cross-media migration (soil to groundwater) of COCs. The cap
shall be functionally equivalent to the performance standards documented in 40
C.F.R. Section 265.310. A portion of the Facility (Lot 27B. as shown on Figure 5) has
vet to be fullv redeveloped and to be capped (Figure 5). All other portions of the
Facility have already been capped consistent with the requirements of the RAP and
this SB's proposed remedy.

A Containment Remedy Operations and Maintenance (O&M) Plan (CROMP) and
Health and Safety Plan (HASP) shall be submitted for EPA and MDE review and
approval and, at a minimum will include the following: the procedures to maintain
the cap over the contaminated soil; a schedule for inspections to be performed as
part of cap maintenance, no less frequent than once a year; and physical
maintenance requirements of the capped areas to prevent degradation of the cap
and unacceptable exposure to the underlying soil. The CROMP and HASP submitted
bv GTA on behalf of MCB for the Phase I and Phase II Lots and approved bv MDE
satisfies this requirement for those areas of the Facility.

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2. Groundwater

The EPA's proposed remedy for Facility groundwater consists of monitored natural
attenuation until MCLs or, if no MCLs exist, the RSLs for tap water are met.

Data show the plume is stable and levels of TCE and PCE are naturally attenuating.
The highest concentrations are of PCE, TCE, and cis-l,2-dichloroethene at the source
area in wells GTA-MW-5 and EGW-10 and concentrations appear to be stable or
decreasing .Additionally, detections of cis-l,2-dichloroethene at GTA-MW-1 through
GTA-MW-5 and EGW-10 and detections of vinyl chloride at GTA-MW-5 and EGW-10,
along with PCE and TCE, is indicative of natural biodegradation of PCE. Cis-1,2-
Dichloroethene and vinyl chloride are produced through the natural reductive
dechlorination of PCE and TCE.

Monitoring wells shall be installed pursuant to an EPA-approved Work Plan and
long-term groundwater monitoring shall be required. Additionally, groundwater
restrictions, which prohibit onsito uso.prohibitions against the use of groundwater
established as a requirement of each COC and NFRD issued by the MDE and
recorded in land records for each of Lots 27. 27C. 27D. 28 and 29/49/50 shall remain
in place to prevent exposure to contaminants while levels remain above MCLs or
RSLs, as applicable. The source removal in the form of soil excavations discussed in
Section 4 and the permanent cover system at the Facility that will reduce
stormwater infiltration will aid in the further attenuation of contamination.

3. Soil Vapor

a.	A vapor intrusion control system, the design of which shall be approved in
advance in writing by the EPA and MDE, shall be installed in each new
structure on the Facility, unless it is demonstrated to EPA and MDE that
vapor intrusion does not pose a threat to human health and EPA and MDE
provide prior written approval that no vapor intrusion control system is
needed.

b.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

c.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

d.	Atmospheric pressure differentials and other factors such as soil
permeability, moisture content, etc., may cause accumulation of methane
beneath hardscaped paved areas, and shall be addressed by installation of
vapor vents located at light pole locations within the parking lots.

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MCB has designed and installed systems across the Facility that are
consistent with the requirements of the RAP and this SB's proposed remedy
for soil vapor.

4. Institutional Controls

The EPA's proposed remedy also includes the following land and groundwater use
restrictions and notifications to protect human health and the integrity of the
remedy:

a.	Groundwater at the Facility shall not be used for any purpose other than the
operation, maintenance, and monitoring activities currently being conducted
at the Facility and activities required by the EPA and MDE, unless it is
demonstrated to the EPA and MDE that such use will not pose a threat to
human health or the environment or adversely affect or interfere with the
final remedy, and the current Facility owner obtains prior written approval
from the EPA and MDE for such use.

b.	No new wells shall be installed on the Facility unless it is demonstrated to the
EPA and MDE that such wells are necessary to implement the final remedy
for the Facility, and the current owner obtains prior written approval from
the EPA and MDE to install such wells.

c.	A vapor intrusion control system, the design of which shall be approved in
advance in writing by the EPA and MDE, shall be installed in each new
structure to be constructed on the Facility, unless it is demonstrated to EPA
and MDE that vapor intrusion does not pose a threat to human health and
EPA and MDE provide prior written approval that no vapor intrusion control
system is needed.

d.	The integrity of vapor intrusion control systems installed in existing buildings
shall be maintained.

e.	All vapor intrusion control systems shall be inspected, maintained, and
repaired as needed.

f.	Compliance with the EPA and MDE-approved O&M PlanCROMP. The O&M

PkH^CROMP will require the current Facility owner to maintain the integrity
of the vapor intrusion control systems and all caps and covers on the Facility
by conducting regular periodic inspections (no less frequently than once per
year), making timely repairs if needed, and maintaining a record of such

inspection and maintenance. Thewill also establish the

documentation, reporting, and notification methods that will be used to

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 18

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implement, monitor compliance, and ensure the O&M PlanCROMP remains
in place and effective.

g.	All earthmoving activities on the Facility, including excavation, grading,
and/or utility construction, shall be conducted in compliance with an EPA
and MDE-approved O&M Plan to ensure that the activity will not pose a
threat to human health and the environment or adversely affect or interfere
with the covered areas.

h.	On an annual basis and whenever requested by the EPA or MDE, the current
Facility owner shall submit to MDE and the EPA a written certification stating
whether the owner is maintaining and complying with all groundwater and
land use restrictions.

i.	The Facility shall not be used in a way that will adversely affect or interfere
with the integrity and protectiveness of the final remedy.

The land and groundwater use restrictions necessary to prevent human exposure to
contaminants at the Facility will be implemented through enforceable Institutional Controls
(ICs) such as an order and/or an Environmental Covenant pursuant to the Maryland Uniform
Environmental Covenants Act, §§ 1-80 I through 1-815 of the Environment Article,
Annotated Code of Maryland to be recorded with the doodin the land records of the Circuit
Court for Baltimore City for the Facility property. If the EPA determines that additional
monitoring activities, institutional controls, or other corrective actions are necessary to
protect human health or the environment, the EPA has the authority to require and enforce
such additional corrective actions through an enforceable mechanism which may include an
order or Environmental Covenant, provided any necessary public participation
requirements are met. If any individual with an interest in the Facility property believes that
information shows that any use restrictions proposed and later selected by the EPA are no
longer necessary to protect public health and the environment, the individual may submit
such information to the EPA for consideration. The EPA can change any such restriction if it
determines it is no longer necessary, after any required public comment period.

Section 8: Evaluation of Proposed Remedy

This section provides a description of the criteria the EPA used to evaluate the proposed
remedy consistent with EPA guidance. The criteria are applied in two phases. In the first
phase, the EPA evaluates three decision threshold criteria as general goals. In the second
phase, for those remedies which meet the threshold criteria, the EPA then evaluates seven
balancing criteria.

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 19

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Threshold Criteria

Evaluation

1) Protect human
health and the
environment

The EPA's proposed remedy for the Facility protects human
health and the environment by eliminating, reducing, or
controlling unacceptable risk through the implementation and
maintenance of environment use restrictions and engineering
controls for contaminated soil and groundwater above
acceptable residential use levels.

Soil

A cap installed throughout the entire Facility will protect
human health and environmental exposure by preventing
direct contact.

Groundwater

Human health and environmental exposure for groundwater
will be protected through restrictions on potable groundwater
use. The proposed use restrictions at the Facility will eliminate
future unacceptable exposures to groundwater until MCLs or
the RSLs for tap water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed. A vapor intrusion control system, the design of which
shall be approved in advance in writing by the EPA and MDE,
shall be installed in each new structure on the Facility, unless it
is demonstrated to EPA and MDE that vapor intrusion does not
pose a threat to human health and EPA and MDE provide prior
written approval that no vapor intrusion control system is
needed.

2) Achieve media
cleanup objectives

The EPA's proposed remedy achieves media cleanup
objectives based on assumptions regarding current and
reasonably anticipated land and water resource use(s). The
proposed remedy in this SB is based on an anticipated
residential land use.

Soil

The permanent cover system at the Facility will prevent direct
contact to impacted soils and will reduce stormwater

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 20

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infiltration to impacted groundwater and prevent receptor
direct contact exposure.

Groundwater

Data show the plume is stable and concentrations of
contaminants of concern are naturally attenuating. The
proposed use restrictions at the Facility will eliminate future
unacceptable exposures to and groundwater until MCLs or the
RSLs for tap water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed. The vapor intrusion control systems include alarms to
indicate if indoor air concentrations exceed the cleanup
criteria.

3) Remediating the
Source of Releases

In all proposed remedies, EPA seeks to eliminate or further
reduce releases of hazardous wastes and hazardous
constituents that may pose a threat to human health and the
environment, and this proposed remedy meets this objective.

The sources of petroleum and PCB releases have been
removed from Facility soils, thereby eliminating, to the extent
practicable, further releases of hazardous constituents from
on-site soils as well as groundwater.

Soil

The permanent cover system at the Facility will prevent direct
contact to impacted soils and will reduce stormwater
infiltration to impacted groundwater and prevent receptor
direct contact exposure.

Groundwater

Data show the plume is stable and concentrations of
contaminants of concern are naturally attenuating. The
proposed use restrictions at the Facility will eliminate future
unacceptable exposures to groundwater until MCLs or the
RSLs for tap water, if no MCLs exist, are met. Groundwater



Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 21

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Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed. A vapor intrusion control system, the design of which
shall be approved in advance in writing by the EPA and MDE,
shall be installed in each new structure on the Facility, unless it
is demonstrated to EPA and MDE that vapor intrusion does not
pose a threat to human health and EPA and MDE provide prior
written approval that no vapor intrusion control system is
needed.

Balancing Criteria

Evaluation

1) Long-term
effectiveness

Soil

The long-term effectiveness of the permanent cover system
will be maintained by the implementation of institutional
controls.

Groundwater

The long-term effectiveness of the remedy will be maintained
by the implementation of land and groundwater use
restrictions. The groundwater use restrictions will be
maintained until MCLs or the RSLs for tap water, if no MCLs
exist, are met.

Soil Vapor

All structures on the Facility have a vapor intrusion control
system, which will be inspected, repaired, and maintained as
needed.

2) Reduction of
toxicity, mobility, or
volume of the
Hazardous
Constituents

Soil

The permanent cover system at the Facility will reduce the
mobility of soil contaminants. The sources of petroleum and
PCB releases have been removed from the soil at the Facility,
thereby eliminating further releases of hazardous constituents
from on-site soils.

Groundwater

Groundwater contaminant levels are anticipated to achieve
MCLs through natural attenuation; groundwater use will be

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 22

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restricted to prevent exposure until MCLs or the RSLs for tap
water, if no MCLs exist, are met.

Soil Vapor

All structures on the Facility are protected by a vapor intrusion
control system.

3) Short-term
effectiveness

Soil

The permanent cover system at the Facility provides
immediate risk reduction. Additionally, the EPA's proposed
remedy takes into consideration future activities, such as
construction or excavation that would pose short-term risks to
workers, residents, and the environment, by requiring
notification of these activities to the EPA and MDE.

Groundwater

The use restrictions would become effective immediately upon
implementation through an enforceable mechanism such as an
EC or order.

Soil Vapor

The vapor intrusion control systems provide immediate risk
reduction.

4) Implementability

The orooosed remedv has alreadv been lareelv imolemented.
and the is readilv imDlementable on the remaining Dortions of
the Facility. The imDlementation of use restrictions will be
through a mechanism that will inform future owners and
occupants of these restrictions, such as an environmental
covenant, permit, or order.

5) Cost

The costs associated with this proposed remedy are associated
with the development and recording of the Environmental
Covenant, permit, or order; cap and vapor intrusion control
system maintenance and inspections; reporting; installation of
new monitoring wells; and continued sampling and
maintenance of the monitoring wells.

6) Community
Acceptance

The EPA will evaluate community acceptance based on
comments received during the public comment period and will
address any comments in the Final Decision.

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 23

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7) State/Support
Agency Acceptance

State involvement has been solicited throughout the RCRA
corrective action process and MDE concurred with the
proposed remedy.

Overall, based on the evaluation criteria, the EPA has determined the proposed remedy
meets the threshold criteria and provides the best balance of tradeoffs with respect to the
evaluation criteria.

Section 9: Financial Assurance

PEMCOMCB will be required to demonstrate and maintain financial assurance for
completion of the remedy pursuant to the standards contained in Federal regulations 40
C.F.R. § 264.145 and 40 CFR § 264.143.

Section 10: Public Participation

The public may participate in the remedy selection process by reviewing this SB and
documents contained in the AR for the Facility and providing comments. The AR contains all
information considered by EPA when proposing this remedy. The AR documents are
available for public review at the location below:

U.S. EPA Region 3

4 Penn Center
1600 JFK Boulevard
Philadelphia, PA 19103
Contact: Christine Kimak (3LD11)

Phone: 215-814-2798
Email: kimak.christine@epa.gov

The public comment period will last thirty (30) calendar days from the date that the notice
is published in a local newspaper. You may submit comments by mail or e-mail to Christine
Kimak. EPA will hold a public meeting to discuss this proposed remedy upon request. If you
would like to request a public meeting, please contact Christine Kimak.

The EPA will respond to all relevant comments received during the comment period. If the
EPA determines that new information warrants a modification to the proposed remedy, the
EPA will modify the proposed remedy or select an alternative based on the new information
and/or public comments. In the Final Decision, the EPA will announce the selection of its
final remedy, respond to all relevant comments received, and explain the rationale for any
changes to the proposed remedy. All persons who comment on this proposed remedy will
Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 24

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receive a copy of the Final Decision. Others may obtain a copy by contacting Christine Kimak
at the address listed above. The Final Decision will also be made publicly available on the
EPA's website for the Facility.

Section 11: Signature

		Date:

Stacie Driscoll, Acting Director

Land, Chemicals, and Redevelopment Division

US EPA, Region 3

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 25

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Section 12: Index to Administrative Record

ERM. 2006. Site Characterization Work Plan. December.

ERM. 2011. Site Characterization and Risk Assessment Report.

ERM. 2013 Final Site Characterization and Risk Assessment Report for 5601 Eastern
Avenue, Baltimore, Maryland. May.

GTA. 2014. Report of Phase I Environmental Site Assessment: Former PEMCO Facility.
April.

GTA. 2016. Response Action Plan. April.

GTA. 2018a. Site Update Response. April.

GTA. 2018b. Soil Vapor Screening and Assessment. April.

GTA. 2018c. Groundwater Evaluation Summary. May.

GTA. 2020. Response Action Plan Completion Report: Yard 56 - Road and Retails Parcels.
November.

USEPA. 2020. Statement of Basis: PEMCO Inc. Lots 27C and 28. May.

Section 13: Attachments

Table 1 - Characterization Sampling Key

Table 2A - VOC Soil Characterization Summary, 2014-2017 Sampling
Table 2B - VOC Soil Characterization Summary, Pre-2014 Sampling
Table 3A - SVOC and PCB Soil Characterization Summary, 2014 Sampling
Table 3B - SVOC and PCB Soil Characterization Summary, Pre-2014 Sampling
Table 4 - Metals Soil Characterization Summary, 2014-2017 Sampling
Table 5 - SVOC Groundwater Characterization Summary
Table 6 - VOC Groundwater Characterization Summary
Table 7 - Metals Groundwater Characterization Summary
Table 8 - Soil Vapor Analysis Summary

Figure 1 - Site Location Map
Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 26

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Figure 2A - Soil Sample Location Plan
Figure 2B - Soil Sample Location Plan
Figure 3A - Groundwater Sample Location Plan
Figure 3B - Groundwater Sample Location Plan
Figure 4A - Soil Vapor Sample Location Plan
Figure 4B - Soil Vapor Sample Location Plan
Figure 5 - Capping Diagram

Statement of Basis

Yard 56
Baltimore, MD

May 2024
Page 27

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Attachment C

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Attachment C
Yard 56 (Formerly PEMCO Corporation)
RESPONSE TO COMMENTS

EPA received comments in the form of proposed text changes from TRP-MCB 5601 Eastern LLC,
MCB Y56 Retail LLC, MCB Y56 Road LLC, MCB Y56 Office LLC, MCB Y56 Office 2 LLC, MCB Y56
Mixed Use LLC, MCB Y56 Lot 27B LLC, and MCB 5801 Eastern LLC (collectively, "MCB" or "the
commentor"), the prior and current owners of the real property that constitutes the Facility,
on the Statement of Basis for the Yard 56 (Formerly PEMCO Corporation) Facility in Baltimore,
MD. A copy of MCB's proposed text changes is included as Attachment B. The EPA's summary
of MCB's proposed changes and the EPA's responses are set forth below:

1.	Section 1: Introduction: The commentor added the following to the second paragraph:
"Note that because it applies to the entire Facility, this SB effectively supersedes that
certain Final Decision and Response to Comments, issued by the EPA in September 2020
for Lots 27C and 28 of the Facility.

EPA Response: The EPA agrees that the remedy in the 2024 Final Decision and Response
to Comments (FDRTC) addresses the entire Facility. This 2024 FDRTC does not, however,
supersede the 2020 FDRTC but incorporates the soils remedy for Lots 27C and 28. For
clarification, the FDRTC states, "In September 2020, the EPA issued an FDRTC for soils at
Lots 27C and 28 and this FDRTC applies to soil and groundwater for the entire Facility.
This FDRTC incorporates the Final Remedy selected in the September 2020 FDRTC for Lots
27C and 28." This language has been incorporated into Section 1 of the Final Decision.

2.	Section 2: Facility Background:

a.	In the first paragraph, the commentor changed the Facility size from 19.97 to
20.02 acres and added "interstate highway corridors" to the land uses in the
vicinity of the property.

EPA Response: The EPA agrees with this comment, as it accurately reflects the
Facility size and land uses and has incorporated this language into Section 2 of
the Final Decision.

b.	In the fifth paragraph, the commentor changed, "The PEMCO name has been
retained throughout the Facility's operation" to "The PEMCO name was retained
throughout the Facility's period of industrial operations." Also, the commentor
changed the following sentence of this paragraph from, "The Facility was
acquired by current ownerTRP-MCB 5601 Eastern, LLC from PEMCO Holding
Corporation in 2014" to "The Facility ceased all industrial operations and was
shut down in 2007. The Facility was then acquired by TRP-MCB 5601 Eastern LLC
(TRP-MCB), from PEMCO Holding Corporation in 2014." The Commentor also
proposed to add the following to the end of that sentence: "...with the intention

-------
of demolishing the former industrial structures and redeveloping the underlying
real property."

EPA Response: The EPA agrees with the first two comments, which provide
additional historical background on the Facility, and has incorporated language
into Section 2 of the Final Decision. The EPA disagrees with the third comment as
it speaks to TRP-MCB's intent.

c.	The Commentor proposed to change the following sentence of the fifth
paragraph from, "The Facility has recently undergone redevelopment consistent
with the remedy elements described in the MDE-approved Response Action Plan
(RAP)" to "TRP-MCB then completed a Response Action Plan (RAP) for the
Facility, pursuant to the requirements of the MDE's VCP."

EPA Response: The EPA agrees with this comment and has incorporated this
language into Section 2 of the Final Decision.

d.	The Commentor proposed to change the following sentence of the fifth
paragraph from, "Portions of the Facility have been redeveloped into a
residential apartment building, retail spaces, and office spaces" to "Following a
review and receipt of comments from both MDE and EPA and subsequent
revisions, a RAP that contemplated the redevelopment of the Facility for
residential, retail, and commercial uses was approved by MDE on May 5, 2016."

EPA Response: The EPA agrees with this comment and has incorporated this
language into Section 2 of the Final Decision.

e.	Commentor also added the following footnote to the proposed sentence change
in Comment #2d above: "While the EPA retains oversight authority and
jurisdiction for Corrective Action under Section 3006 of RCRA, the entire Facility
is also overseen by the MDE under its Voluntary Cleanup Program. As such, the
Facility investigation and remedial actions described herein have been
cooperatively overseen by both the EPA and the VCP. The MDE-approved RAP is
considered by EPA to have satisfied the RCRA Corrective Action requirements for
a Corrective Measures Study (CMS)."

EPA Response: EPA agrees that Facility investigation and remedial actions have
been cooperatively overseen by both the EPA and MDE under the VCP. EPA has
incorporated the following language into the Final Decision: "The MDE-approved
RAP is considered by the EPA to have satisfied the RCRA Corrective Action
requirements for a Corrective Measures Study (CMS)."

f.	The Commentor proposed to delete the last paragraph of the Section.

-------
EPA Response: The EPA agrees with this comment as the information is reflected
in language added to Section 2.

g. The Commentor added the following text to the end of Section 2:

"An affiliate of TRP-MCB acquired an adjacent property (5801 Eastern Avenue,
0.62 acres) not historically part of the Facility and thus not subject to EPA RCRA
oversight. On November 11, 2018, TRP-MCB acquired 5801 Eastern Avenue and
that same day, subdivided 5801 Eastern Avenue and the real property that
historically comprised the Facility, creating five (5) new, separate real property
Lots. Each of these Lots was subsequently transferred by TRP-MCB to five (5)
separate affiliated entities, but not before each entity applied to and was granted
'inculpable person' status by the MDE. Following the submission of applications
by each of the new property owners, the MDE accepted each new Owner and its
Lot into the VCP on April 3, 2019. After a subsequent Amendment to the
Subdivision Plat was recorded on April 16, 2021, and subsequent amendments
filed with the VCP to ensure continuity, the owners and each of the Lots that
currently comprise the former Facility are as follows:

Lot

Acreage

Property Owner

Existing/Planned
Use

Current
Redevelopment
Status per RAP

27

4.223

MCB Y56 Mixed
Use LLC

Existing Residential

apartments &
commercial (retail)

Complete

27B

5.473

MCB Y56 Lot 27B

Proposed

Not yet





LLC

Commercial

redeveloped

27C

1.053

MCB Y56 Road
LLC

Existing Roadway

Complete

27D

1.091

MCB Y56 Office 2
LLC

Existing Commercial
(offices & retail)

Complete

28

7.197

MCB Y56 Retail
LLC

Existing Commercial
(retail)

Complete

29/49/50

1.602*

MCB 5801
Eastern LLC

Existing Commercial
(service station)

Complete

Note: 0.62 acres of this Lot was not historically part of the Facility and, as such, is
not subject to RCRA Correction Action requirements. However, the entire Lot is
enrolled in the MDE's Voluntary Cleanup Program.

Each of TRP-MCB, MCB Y56 Retail LLC, MCB Y56 Road LLC, MCB Y56 Office LLC,
MCB Y56 Office 2 LLC, MCB Y56 Mixed Use LLC, MCB Y56 Lot 27B LLC, and MCB
5801 Eastern LLC, collectively the prior and current owners of the real property
that constitutes the Facility since its acquisition by TRP-MCB in 2014, are
collectively referred to herein as 'MCB'. Since the approval of its RAP in 2016 and
subsequent completion of all planning and permitting requirements, the Facility

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has largely been redeveloped by MCB in two separate phases, respectively
known as 'Phase I' and 'Phase II.' In March 2018, TRP-MCB began demolition of
existing buildings and construction activities at the Facility. Phase I involved the
redevelopment of Lot 27C (the 'Road' parcel), Lot 28 (the 'Retail' parcel), and Lot
29/49/50 (5801 Eastern- the gas station parcel) and was completed in late 2020.
MCB's redevelopment process completed for these Lots and the construction of
all improvements was consistent with the remedy elements described in the
MDE-approved RAP. The MDE issued a 'Certificate of Completion' (COC) for Lots
27C and 28 and a 'No Further Requirements Determination' (NFRD) for Lot
29/49/50 in December 2020. Phase II of the Facility's redevelopment began in
the fall of 2020 involving Lot 27 (the 'Mixed Use' parcel) and Lot 27D (the
'Medical Office Building' parcel), and was completed in May 2024 when the MDE
issued a COC for both Lots. Likewise, MCB's redevelopment process completed
for these Lots and the construction of all improvements was consistent with the
remedy elements described in the MDE-approved RAP. While the redevelopment
of Lot 27B has yet to be completed, all grading and related groundwork on the
real property has been completed. Any final use and design of any structure and
improvements on the Lot shall be consistent with and comply with the
requirements of the RAP and this SB. With the pending completion of Phase I of
the Facility's redevelopment in 2020, EPA developed and issued a Final Decision
and Response to Comments in September 2020 solely for Lots 27C and 28 of the
Facility (FDRTC). This SB provides a remedy that is consistent with the 2020
FDRTC but is intended to apply to the entire Facility, not simply Lots 27C and 28.
As such, this SB (once finalized and issued as a Final Decision) is intended to
supersede the 2020 FDRTC with regards to Lots 27C and 28."

EPA Response: The EPA agrees with some of these comments to clarify the lot-
specific property ownership and use; with the exceptions noted below, and has
incorporated language into Section 2 of the Final Decision.

/'. "An affiliate of TRP-MCB acquired an adjacent property (5801 Eastern
Avenue, 0.62 acres) not historically part of the Facility and thus not
subject to EPA RCRA oversight. On November 11, 2018, TRP-MCB acquired
5801 Eastern Avenue and that same day, subdivided 5801 Eastern Avenue
and the real property that historically comprised the Facility, creating five
(5) new, separate real property Lots. Each of these Lots was subsequently
transferred by TRP-MCB to five (5) separate affiliated entities, but not
before each entity applied to and was granted "inculpable person"status
by the MDE. Following the submission of applications by each of the new
property owners, the MDE accepted each new Owner and its Lot into the
VCP on April 3, 2019. After a subsequent Amendment to the Subdivision
Plat was recorded on April 16, 2021, and subsequent amendments filed
with the VCP to ensure continuity..." This information was not relevant to
the SB and did not affect the EPA's proposed remedy.

-------
"However; the entire Lot is enrolled in the MDE's Voluntary Cleanup
Program." This information was not relevant to the SB and did not affect
the EPA's proposed remedy.

Hi. "Since the approval of its RAP in 2016 and subsequent completion of all
planning and permitting requirements..." This information was not
relevant to the SB and did not affect the EPA's proposed remedy.

iv.	"MCB's redevelopment process completed for these Lots and the
construction of all improvements was consistent with the remedy
elements described in the MDE-approved RAP. The MDE issued a
"Certificate of Completion" (COC)for Lots 27C and 28 and a "No Further
Requirements Determination" (NFRD) for Lot 29/49/50 in December
2020." This information was not relevant to the SB and did not affect the
EPA's proposed remedy.

v.	"...when the MDE issued a COCfor both Lots. Likewise, MCB's
redevelopment process completed for these Lots and the construction of
all improvements was consistent with the remedy elements described in
the MDE-approved RAP." This information was not relevant to the SB and
did not affect the EPA's proposed remedy.

3. Section 4: Summary of Environmental Investigations:

a.	B. 2006/2007 Site Characterization:

i.	In the first paragraph, commentor removed the word "has" and deleted
the definition of VCP.

EPA Response: The EPA agrees with the deletion of the definition of VCP,
but disagrees wih the proposed former language as the text is only
editorial.

ii.	In the second paragraph, the commentor noted that cobalt was detected
in six soil samples, not five.

EPA Response: The EPA agrees with this comment as it accurately reflects
the soil sampling and has incorporated language into Section 3 of the
Final Decision.

b.	C. 2014 Supplemental Characterization:

i. In the first paragraph, the commentor changed TRP-MCB 5601 Eastern,
LLC to TRP-MCB.

EPA Response: The EPA agrees with this comment, as it accurately reflects
the abbreviated reference to TRP-MCB 5601 Eastern, LLC used in the SB
and has incorporated language into Section 3 of the Final Decision.

-------
ii.	On page 9 of the SB, the summary of groundwater sampling for VOCs
originally stated that "Carbon tetrachloride exceeded the MCL of 5 |ag/L in
GTA-MW-2 through GTA-MW-5, EGW-10, and EGW-12 with
concentrations ranging from 5.4 to 290 |-ig/L." The commentor corrected
the statement to indicate that concentrations ranged from 10 to 290
Mg/L.

EPA Response: The EPA agrees with this comment and has incorporated
language into Section 3 of the Final Decision.

iii.	On page 10 of the SB, the summary of soil vapor detection for VOCs
originally stated that "Trichloroethane (MDE Tier 1 of 4.2 |ag/m3) was
found at concentrations ranging from non-detect to 5.3 |ag/m3."
Commentor corrected the statement to indicate that concentrations
ranged from non-detect to 6.5 mg/m3.

EPA Response: The EPA agrees with this comment and has incorporated
language into Section 3 of the Final Decision.

iv.	On page 10 of the SB, the commentor changed the last sentence of the
Section to read: "Methane was detected in the central portion of the
former landfill known as Crystal Hill as high as 61.7% by volume."

EPA Response: The EPA agrees with this comment to further identify the
former landfill portion of the Facility and has incorporated language into
Section 3 of the Final Decision.

c. D. Supplemental Investigation:

i.	Throughout the subsection, the commentor changed TRP-MCB 5601
Eastern, LLC to TRP-MCB.

EPA Response: The EPA agrees as it accurately reflects the abbreviated
reference to TRP-MCB 5601 Eastern, LLC used in the SB and has
incorporated language into Section 3 of the Final Decision.

ii.	In the fifth paragraph, the commentor changed 1,1-Dichloroethane to
1,1-Dichloroethene.

EPA Response: The EPA agrees with this comment as it accurately reflects
the sampling results and incorporated this language into Section 3 of the
Final Decision.

iii.	In the last paragraph, the commentor changed the first sentence from,
"In November 2019, TRP-MCB 5601 Eastern, LLC conducted an additional

-------
methane evaluation" to "In November 2019, GTA initiated an additional
methane evaluation on behalf of MCB."

EPA Response: The EPA agrees with this comment as it identifies the
environmental consultant that performed the evaluation on behalf of TRP-
MCB 5601 Eastern, LLC and incorporated this language into Section 3 of
the Final Decision.

iv. Also in the last paragraph, the commentor changed the following
sentence from, "Four rounds of methane screening were conducted
between November 15, 2019 and December 18, 2019, and on July 24,
2020" to "Five rounds of methane screening were conducted between
November 15, 2019 and October 8, 2021."

EPA Response: The EPA agrees with this comment as it accurately reflects
the timeline and rounds of methane screening and has incorporated this
language into Section 3 of the Final Decision.

E.	Natural Attenuation: In the second paragraph, the commentor corrected the
date in the first sentence from March 2013 to March 2018.

EPA Response: The EPA agrees with this comment as it accurately reflects the
date of the ground water sampling event and has incorporated this language into
Section 3 of the Final Decision.

F.	Interim Measures:

i.	The commentor changed the first sentence in the first paragraph from,
"Soil sampling conducted by TRP-MCB 5601 Eastern, LLC..." to "Soil
sampling conducted in 2018 by GTA on behalf of MCB..."

EPA Response: The EPA agrees with this comment as it identifies the
environmental consultant that performed the evaluation on behalf of TRP-
MCB 5601 Eastern, LLC and has incorporated language into Section 3 of
the Final Decision.

ii.	The commentor corrected the last sentence in the first paragraph to state
164 tons of material were disposed of instead of 161,000 kilograms or
178 tons of material.

EPA Response: The EPA agrees with this comment as it accurately reflects
the amount of material disposed and has incorporated language into
Section 3 of the Final Decision.

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The commentor moved the following after the first paragraph: "In 2018,
TRP-MCB identified and removed three 8,000-gallon diesel USTs
(identified as UST Nos. 2-4), two 500-gallon heating oil USTs (identified as
UST Nos. 5 and 6), and a 550-gallon heating oil UST (identified as UST No.
8) and associated petroleum-impacted soils were identified and removed.
It should be noted that UST Nos. 1 and 7 had been previously removed
from the Facility. A total of 437.04 tons of petroleum impacted soil was
removed during all excavation activities described above." The
Commentor also changed TRP-MCB 5601 Eastern, LLC to TRP-MCB, added
"and associated petroleum-impacted soils were identified and removed",
and corrected the volume of soil from 343.7 to 437.04 tons.

EPA Response: The EPA agrees to add these details describing the removal
of USTs and related impacts and has incorporated this language into
Section 3 of the Final Decision.

In the original second paragraph, the commentor corrected dates of
redevelopment activities as throughout 2018 and 2023 instead of 2019,
corrected dates of discovery of two areas of petroleum-impacted soil as
between December 2018 and March 2019 instead of January 2019,
corrected the location of the discovery as the southeastern and central
portions of the Facility, clarified that soils in the southeastern portion of
the Facility was observed approximately 1-foot bgs and consisted of gray
clays and silts that exhibited a petroleum odor, and corrected the area of
excavation as follows: irregularly shaped, but approximately 51 feet long,
18 feet wide, and 5 feet deep.

EPA Response: The EPA agrees with these comments to clarify the details
related to petroleum-impacted soils and has incorporated language into
Section 3 of the Final Decision.

In the original third paragraph, the commentor corrected the date in the
first sentence from March 2018 to April 2019, added that it was a second
area of petroleum-impacted soil, corrected the area of the Facility where
the discovery was made from southeastern to central, and deleted the
statement that the area was contiguous to the impacts identified in
December 2018 and in January 2019.

EPA Response: The EPA agrees with these comments to clarify the details
related to petroleum-impacted soils and has incorporated language into
Section 3 of the Final Decision.

In the original third paragraph, commentor changed the following
sentence from "The soil observations and PID readings were generally

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consistent to the area of adjacent impacts" to "Observed PID readings
ranged between 50 and 100 ppm."

EPA Response: The EPA agrees with this comment as it clarifies the PID
readings and has incorporated language into Section 3 of the Final
Decision.

vii.	In the original fourth paragraph, the commentor added that in May and
June 2019, a third area of petroleum-impacted materials were
encountered.

EPA Response: The EPA agrees with this comment to clarify the areas of
petroleum-impacted materials and has incorporated language into
Section 3 of the Final Decision.

viii.	The Commentor added the following text to the end of the Section: "In
December 2023, a fourth area of petroleum-impacted soil was identified
along the western property boundary, in a former parking area adjacently
east of the Umbra Street Alley. The approximate area of excavated
petroleum-impacted soil was 15-foot wide, by 450-foot long, and 1 foot
deep. The petroleum-impacted soil was directly loaded for off-site
disposal. In addition, landfill debris that exhibited an unusual odor was
encountered within an approximate 85-foot-long section of sewer utility
installation, generally within the central portion of the landfill. This area
generally corresponds to a VOC-impacted area identified during prior
evaluations. The odoriferous materials were generally located beneath
approximately two feet of clay material and consisted of a gray granular
material with some clay mixed with paper and plastic debris. This material
was encountered to a depth of approximately 1VA feet below existing
grades, where more granular soil and clays mixed with construction
debris were encountered. The utility trench generally measured 5 feet
wide, with the upper portions sloped outward for safety. A total of 717.31
tons of VOC- and lead-impacted soil was removed during the excavation
activities described above."

EPA Response: The EPA agrees to add details related to the fourth area of
petroleum-impacted soils and has incorporated language into Section 3 of
the Final Decision.

4. Section 5: Human Health Risk Assessment: The commentor added the following

sentence to the end of the Section: "With the exception of a single detection, methane
has not been detected in any monitoring point located along the perimeter of the
Facility."

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EPA Response: The EPA agrees with this comment to clarify methane impacts at the
Facility and has incorporated language into Section 4 of the Final Decision.

5.	Section 6: Corrective Action Objectives:

a.	Under the Soil CAO, the commentor changed "hazardous" to "regulated".

EPA Response: The EPA disagrees with the comment to change "hazardous" to
"regulated" but agrees to change from hazardous constituents to contaminants.

b.	Underthe Groundwater CO A, commentor added the following text: "Municipal
water is available and supplied by the City of Baltimore throughout the entire
area surrounding the Facility. There are no known users of groundwater in the
surrounding area, and otherthat environmental monitoring wells, no wells
installed on or in the area surrounding the Facility. State of Maryland Well
Construction Regulations, codified at Code of Maryland Regulations 26.03.01.05,
prohibit installation of individual water systems where adequate public systems
are available. Moreover, Section 317.1 of Baltimore City's Building Code requires
the connection of any building's water distribution system in which plumbing
fixtures are installed to a public water supply system unless otherwise authorized
by the State."

EPA Response: The EPA acknowledges this information but rejects incorporating it
into the Final Decision as it was not relevant to the proposed remedy for
groundwater and the requirement for the Facility to conduct long-term
groundwater monitoring.

6.	Section 7: Proposed Remedy:

a.	Throughout this Section, the commentor changed the acronym for the
Containment Remedy Operations and Maintenance Plan from O&M Plan to
CROMP.

EPA Response: The EPA agrees with this comment as it more accurately
reflects the name of the Plan and has incorporated language into Section
7 of the Final Decision.

b.	Soil

i. The commentor deleted the following sentence: "The remaining area of
the Facility to be capped (Figure 5) includes a small portion undergoing
redevelopment (the rest of the Facility has already been capped)."

EPA Response: The EPA disagrees with this comment because the original
language accurately reflects that there remains a portion of the Facility
that still needs to be capped. The EPA will note that the remaining area to
be cap is identified as Lot 27B.

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ii.	The commentor added the following sentence to the end of the first
paragraph: "A portion of the Facility (Lot 27B, as shown on Figure 5) has
yet to be fully redeveloped and to be capped (Figure 5). All other portions
of the Facility have already been capped consistent with the requirements
of the RAP and this SB's proposed remedy."

EPA Response: The EPA disagrees with this comment because it has
already been noted elsewhere in this paragraph.

iii.	The commentor defined Health and Safety Plan as HASP.

EPA Response: The EPA disagrees with this comment because the acronym
is not used anywhere else in the document.

iv.	The commentor added and to the first sentence of the second paragraph.

EPA Response: The EPA agrees with this comment and has incorporated
language into Section 7 of the Final Decision.

v.	The commentor proposed the following addition to the end of the second
paragraph: "The CROMP and HASP submitted by GTA on behalf of MCB
for the Phase I and Phase II Lots and approved by MDE satisfies this
requirement forthose areas of the Facility."

EPA Response: The EPA disagrees with this comment. The EPA notes that
these requirements have been met and approved by MDE, but it is not
relevant to include in the Final Decision.

c. Groundwater: The commentor proposed to change the second sentence of the
third paragraph from "Additionally, groundwater restrictions, which prohibit
onsite use, shall remain in place to prevent exposure to contaminants while
levels remain above MCLs or RSLs, as applicable" to "Additionally, prohibitions
against the use of groundwater established as a requirement of each COC and
NFRD issued by the MDE and recorded in land records for each of Lots 27, 27C,
27D, 28 and 29/49/50 shall remain in place to prevent exposure to contaminants
while levels remain above MCLs or RSLs, as applicable."

EPA Response: The EPA agrees with this comment. After the Statement of Basis
was published, MCB recorded an environmental covenant on the title to Lots 27,
27C, 27D, 28 and 29/49/50 implementing groundwater use restrictions. The EPA
has incorporated language into Section 7 of the Final Decision.

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d. Soil Vapor: The commentor proposed to add the following item e: "MCB has
designed and installed systems across the Facility that are consistent with the
requirements of the RAP and this SB's proposed remedy for soil vapor."

EPA Response: The EPA disagrees with this addition. The EPA notes that VI
systems have been installed at onsite structures, but it is not relevant to include in
the proposed remedy.

e.	Institutional Controls

i.	The commentor added the phrase to be constructed for each new
structure at the Facility.

EPA Response: The EPA disagrees with this comment as it is redundant.

ii.	The commentor changed the Environmental Covenant to be recorded
with the land records of the Circuit Court for Baltimore City from
recording with the deed.

EPA Response: The EPA agrees with this change and has incorporated
language into Section 7 of the Final Decision.

f.	Evaluation of Proposed Remedy:

i.	Under the third Threshold Criteria, the commentor deleted the statement
that groundwater monitoring of the onsite wells will continue long term.

EPA Response: The EPA disagrees with this comment. As stated in Section
7 and as required for the Proposed Remedy, monitoring wells shall be
installed pursuant to an EPA-approved Work Plan and long-term
groundwater monitoring shall be required.

ii.	Under the fourth Balancing Criteria, the commentor changed the first
sentence from, "The proposed remedy is readily implementable" to "The
proposed remedy has already been largely implemented, and the is
readily implementable on the remaining portions of the Facility."

EPA Response: The EPA disagrees with this comment. It has already been
noted in this SB that the proposed remedy has been largely implemented.
Furthermore, the threshold and balancing criteria are used to evaluate
the proposed remedy; therefore, it is not appropriate to state here those
activities that have already taken place at the Facility.

7. Section 9 Financial Assurance: The commentor changed the entity responsible for
Financial Assurance from PEMCO to MCB.

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EPA Response: The EPA agrees with this change as it accurately reflects the name of the
party that will provide Financial Assurance and has incorporated language into Section 8
of the Final Decision.

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