Site Inspection Report
Central Metal
Huntington Park, Los Angeles County, California
EPA ID No.: CAN000903324
USAGE Contract Number: W912P7-16-D-0001
Document Control Number: 12767.900.004.2000.02
Prepared for:
U.S. ENVIRONMENTAL PROTECTION AGENCY
REGION 9
Prepared by:
WESTON SOLUTIONS, INC.
2300 Clayton Road, Suite 900
Concord, CA 94520
September 2023
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Central Metal SI Report
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CAN000903324 TABLE OF CONTENTS
TABLE OF CONTENTS
Section Page
EXECUTIVE SUMMARY ES-1
1. INTRODUCTION 1
1.1 EPA Regul atory Authority 1
1.2 EPA Regul atory Hi story 1
1.3 Apparent Problem 2
2. SITE DESCRIPTION 4
2.1 Location and Description 4
2.2 Operational and Regulatory History 6
2.2.1 Operational History 6
2.2.2 State and Local Regul atory Hi story 8
2.2.2.1 State of California 8
2.2.2.2 County of Los Angeles 9
3. INVESTIGATIVE EFFORTS 11
3.1 Previous Investigations 11
3.1.1 Non-Regulatory Investigations 11
3.1.1.1 2000 Subsurface Soil Investigation 11
3.1.1.2 2001 CMI Subsurface Soil Investigation 11
3.1.1.3 2003 CMI Subsurface Soil Investigation 11
3.1.1.4 2004 CMI Subsurface Soil Investigation 12
3.1.1.5 2010 CMI Debris Pile Classification Sampling 12
3.1.1.6 2021 CMI Phase II Sampling 12
3.1.2 State and Local Regulatory Agency Investigations 13
3.1.2.1 2011 DTSC Debris Pile Sampling Investigation 13
3.1.2.2 2017-2018 CUPA Debris Pile Investigation 14
3.1.3 Previous Federal Regulatory Agency Investigations 14
3.2 Site Inspection (SI) Sampling 14
3.2.1 Action Levels 16
3.2.1.1 Source Action Level 16
3.2.1.2 Groundwater Release Action Level 17
3.2.1.3 HRS Soil Screening Benchmark 17
3.2.2 2019 EPA Stage 1 SI - Soil Vapor and Limited Soil Sampling 17
3.2.2.1 Stage 1 Soil Vapor Results for VOCs 18
3.2.2.2 Stage 1 Soil Sampling Results for Metals 19
3.2.3 2019 EPA Stage 2 SI - Soil and Groundwater Sampling 20
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CAN000903324 TABLE OF CONTENTS
3.2.3.1 Stage 2 Sampling Results for VOCs 21
3.2.3.2 Stage 2 Sampling Results for Metals 22
3.2.4 2022 EPA Stage 3 SI - Residential Soil Sampling 23
3.2.4.1 Stage 3 SI - Residential Phase 23
3.2.4.2 Stage 3 SI - Background Phase 27
4. HAZARD RANKING SYSTEM FACTORS 28
4.1 Sources of Contamination 28
4.2 Groundwater Pathway 29
4.2.1 Hydrogeological Setting 29
4.2.2 Groundwater Targets 32
4.2.3 Groundwater Pathway Conclusion 32
4.3 Soil Exposure and Subsurface Intrusion Pathway 33
4.3.1 Soil Exposure 33
4.3.1.1 Physical Conditions 34
4.3.1.2 Soil Exposure Targets 34
4.3.1.3 Soil Exposure Conclusion 34
4.3.2 Subsurface Intrusion 35
4.4 Surface Water Pathway 35
4.5 Air Pathway 36
4.6 Hazard Ranking System Summary 36
5. REFERENCES 39
in
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Central Metal SI Report September 2023
CAN000903324 TABLE OF CONTENTS
LIST OF TABLES
Table 1: Site Chronology
Table 2: 2021 CMI Phase II Sampling Results Summary
Table 3: 2011 DTSC Debris Pile Sampling Results Summary
Table 4: 2018 CUPA Debris Pile Sampling Results Summary
Table 5: Stage 1 - Soil Vapor Survey Results Summary - Select VOCs
Table 6: Stage 1 - Soil Sampling Results Summary - Select Metals
Table 7: Stage 2 - Soil Sampling Results Summary - Select Metals
Table 8: Stage 2 - Groundwater Sampling Results Summary - Select Analytes
Table 9: Stage 3 - Residential Soil Sampling - HRS Soil Screening Benchmarks
Table 10: Stage 3 - Residential Soil Sampling Results - Four-Point Composite
Table 11: Stage 3 - Residential Soil Sampling Results - ISM
Table 12: Stage 3 - Residential Soil Sampling - Lead Results Summary
Table 13: Stage 3 - Residential Soil Sampling - Arsenic Results Summary
Table 14: Stage 3 - Background Soil Sampling Results
Table 15: Bulletin 104 Aquifer Elevations near Site
Table 16: Water Purveyors Operating Active Wells Within the Target Distance Limit
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CAN000903324 TABLE OF CONTENTS
LIST OF FIGURES
Figure 1 Site Location Map
Figure 2 Proj ect Area Map
Figure 3 Parcel Layout Map
Figure 4 Site Layout Map
Figure 5 Stage 1 - Select Soil Vapor Results
Figure 6 Stage 1 SVP VOC Results
Figure 7 Stage 2 DP & CPT Sampling Layout
Figure 8 Stage 2 DP & CPT VOC Results
Figure 9 Stage 3 - Residential Neighborhood Layout Map
Figure 10 Stage 3 - Residential Sampled Property Layout
Figure 11 Methodology for Determining HRS Screening Benchmarks
Figure 12 Stage 3 - Residential Sampled Property Lead Results
Figure 13 Stage 3 - Residential Sampled Property Arsenic Results
Figure 14 Stage 3 - BZ-1 Sampling Results for Arsenic and Lead
Figure 15 Stage 3 - BZ-2 Sampling Results for Arsenic and Lead
Figure 16 Stage 3 - BZ-3 Sampling Results for Arsenic and Lead
Figure 17 Stage 3 - BZ-4 Sampling Results for Arsenic and Lead
Figure 18 Stage 3 - BZ-5 Sampling Results for Arsenic and Lead
Figure 19 Stage 3 - Reference Area Sampling Results for Arsenic and Lead
Figure 20 Proximate Industrial Facilities Map
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CAN000903324 TABLE OF CONTENTS
APPENDICES
APPENDIX A ACRONYMS AND ABBREVIATIONS
APPENDIX B REMOVAL EVALUATION CONSIDERATIONS
APPENDIX C SITE RECONNAISSANCE INTERVIEW AND OBSERVATION
REPORT/PHOTOGRAPHIC DOCUMENTATION
APPENDIX D CONTACT LOG AND CONTACT REPORTS
APPENDIX E TRANSMITTAL LIST
ATTACHMENTS
ATTACHMENT 1 REFERENCES
ATTACHMENT 2 DEBRIS PILE TIMELAPSE
ATTACHMENT 3 SAMPLING AND ANALYSIS PLAN (SAP) - STAGE 1 & 2
ATTACHMENT 4 SAMPLING AND ANALYSIS PLAN (SAP) - STAGE 3
ATTACHMENT 5 SAMPLE NO. - CLP CORRELATION TABLES
ATTACHMENT 6 CPT LITHOLOGICAL PROFILE REPORTS
ATTACHMENT 7 LABORATORY REPORTS - STAGE 1 & 2
ATTACHMENT 8 LABORATORY REPORTS - STAGE 3
ATTACHMENT 9 FIELD SAMPLING LOGBOOK
ATTACHMENT 10 EPA DOCUMENT 540-F-94-028
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CAN000903324 EXECUTIVE SUMMARY
EXECUTIVE SUMMARY
The Central Metal site is located at 8201 Santa Fe Ave., Huntington Park, Los Angeles County,
California. The approximately 11-acre site is located within an industrial corridor bound to the east
and west by residential neighborhoods, specifically the unincorporated communities of Walnut
Park to the east and Florence-Firestone to the west.
Industrial operations have been conducted at the site since at least the late 1920s, at which time
the northeastern portion of the site was developed into a metal-tank manufacturing facility. These
operations continued through the mid-1980s. A metal foundry also operated on the site during this
time period. In the late 1980s, this portion of the site was converted into a scrap metal recycling
facility that operated as Damille Metal Supply, Inc. (DMS) through at least the late 1990s. In 2002,
Central Metal, Inc (CMI) acquired the facility and continued on-site metal recycling operations.
CMI expanded its operations to the southwestern portion of the site in 2004, which had previously
been occupied by rail lines, a train depot, and various other rail related buildings since the late
1800s. Scrap metal operations at the facility were terminated in 2016 after Los Angeles County
did not grant a new Conditional Use Permit. The entirety of the site was purchased in December
2021 and is currently in the process of being converted into a U-Haul® truck rental and storage
facility.
Historical on-site metal recycling operations generally included the sorting and cleaning of
purchased scrap metal followed by the cutting and shredding of the metal into compact sizes for
domestic and international shipment. During operations, various scrap metal and debris were
stored across the exterior portions of the site in large, uncontained, and uncovered debris piles. A
debris pile located on the north-central portion of the site in 2005 is estimated to have covered
more than 23,000 square feet (ft2) and been several stories in height.
In 2016, the U.S. Environmental Protection Agency (EPA) identified the site as a potentially
hazardous waste site and entered it into the Superfund Enterprise Management System (SEMS).
EPA completed a Preliminary Assessment (PA) for the site in 2018. Upon review of the PA, EPA
determined that further investigation was warranted to determine if the site was a source of
area-wide volatile organic compound (VOC) and/or metals groundwater contamination and,
subsequently, initiated a Site Inspection (SI). As part of the SI, EPA conducted an on-site soil
vapor survey and limited soil sampling event in April 2019 (Stage 1) followed by a more
comprehensive soil and groundwater sampling event in June 2019 (Stage 2).
During the 2019 Stage 1 and Stage 2 SI Investigations, subsurface soils at the site were identified
with elevated concentrations of metals, specifically arsenic, cadmium, cobalt, copper, lead, silver,
and zinc. Tetrachloroethylene (PCE) was identified in soil vapor at a single location but was not
detected in soil samples or in groundwater beneath the site. Based on the minimal VOC
concentrations found in soil groundwater during the investigation, the site does not appear to be a
significant source of area groundwater contamination.
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CAN000903324 EXECUTIVE SUMMARY
During the course of the SI, EPA became aware that a debris pile on the facility had been
containerized in December 2018 and subsequently sampled by CMI under the direction of the local
Certified Unified Program Agency (CUPA). Analytical data indicated that the material was
classified as a hazardous waste based on identified concentrations of arsenic, lead, and/or
cadmium. Moreover, an investigation conducted in 2011 by the California Department of Toxic
Substances Control (DTSC) also identified high levels of hazardous heavy metals in waste piles
on the site, specifically lead, cadmium, and zinc.
Prompted by concerns raised by the surrounding community that windblown material from
historical on-site debris piles had blown into their yards, EPA proceeded to complete a
comprehensive aerial imagery analysis to assess the controls and volumes of historical debris piles
as well as an analysis of the prevailing wind directions. Based on the results of this analysis, along
with the site's proximity to large downwind residential populations, EPA concluded that a
residential sampling effort was necessary to determine if hazardous metals from historical on-site
debris piles, which may have had contamination similar to those found in the sampled debris pile,
could have been deposited onto nearby residential properties.
EPA conducted the Stage 3 SI sampling event in two phases: a residential sampling phase, which
was completed in August 2022; and a background sampling phase, which was completed in
October 2022. Both phases included the collection of shallow (i.e., less than 4 inches) soil samples
from areas of exposed soil using a four-point composite procedure and Incremental Sampling
Methodology (ISM). During the residential phase, 63 properties were sampled within the Walnut
Park residential neighborhood, downgradient with respect to the primary easterly wind direction,
and 20 properties were sampled within the Florence-Firestone residential neighborhood,
downgradient with respect to the secondary westerly wind direction. The background phase
included the sampling of five publicly accessible areas to determine reference concentrations of
metals in the urban environment in soils near the site but likely not impacted by the site.
Lead was identified at concentrations exceeding the assigned Hazard Ranking System (HRS) soil
screening benchmark of 401 parts per million (ppm) at eight properties; arsenic was identified at
concentrations exceeding the assigned HRS screening benchmark of 22 ppm at three properties.
In summary, there are minimal screening level exceedances; 11 out of 83 residences or 13% of the
sample group. EPA is working with owners of the 11 properties to arrange additional sampling if
requested. Residential sampling data does not indicate Central Metal as a significant source of
lead, arsenic, or other metals in the subject neighborhoods. Specifically, concentrations within the
sampled area are sporadic and do not indicate any correlation between magnitude and distance
from the facility. Therefore, metal contamination in the sampled residential soils cannot be
attributed to historical or current operations at the Central Metal site and are most likely a function
of both historical and current stationary and non-stationary lead sources found in the surrounding
Los Angeles metropolitan area.
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CAN000903324 INTRODUCTION
1. INTRODUCTION
1.1 EPA Regulatory Authority
Under the authority of the Comprehensive Environmental Response, Compensation, and Liability
Act of 1980 (CERCLA), Weston Solutions, Inc. (WESTON®) has been tasked to conduct a Site
Inspection (SI) of the Central Metal site in Huntington Park, Los Angeles County, California.
Acronym and abbreviations are listed in Appendix A.
The purpose of an SI is to evaluate a site with potential releases of a hazardous substance and its
environs to assess the threats, if any, posed to public health, welfare, or the environment and to
determine if further investigation under CERCLA is warranted. The site is then evaluated using
U.S. Environmental Protection Agency (EPA) Hazard Ranking System (HRS) criteria to assess
the relative threat associated with actual or potential releases of hazardous substances at the site.
The HRS has been adopted by EPA to help set priorities for further evaluation and eventual
remedial action at hazardous substance sites. The HRS is the primary method of determining a
site's eligibility for placement on the National Priorities List (NPL). The NPL is a list compiled
by EPA of uncontrolled hazardous substance releases in the United States that are priorities for
long-term remedial evaluation and response.
This SI Report summarizes the findings of these preliminary investigative activities and establishes
whether the site is eligible for NPL consideration based on the magnitude and extent of
contamination attributable to the site. Ineligibility does not necessarily indicate that there is no
contamination on the site only that, based on available data, the site does not currently meet the
criteria for placement on the NPL; state and local authorities have different criteria and authorities
which may allow them to move forward with additional assessment or remedial activities.
Unaltered petroleum products, as well as any substances that are purposefully added to the
indigenous petroleum product during the refining process, are excluded from consideration under
CERCLA. National Contingency Plan (NCP) factors are summarized in Appendix B. More
information about the Superfund program is available on the EPA website at
https://www.epa.gov/superfund/what-superfund.
1.2 EPA Regulatory History
The Central Metal site was identified as a potentially hazardous waste site and was entered into
the Superfund Enterprise Management System (SEMS) on March 11, 2016 (CAN000903324). The
site was formerly identified in SEMS as Damille Metal SVC (EPA, 2023a).
On behalf of EPA, WESTON® completed a Preliminary Assessment (PA) for the Central Metal
site in January 2018. Upon review of the PA, EPA determined that further assessment was needed
under CERCLA and initiated an SI. In support of the SI, WESTON completed soil vapor, soil, and
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CAN000903324 INTRODUCTION
groundwater sampling events at the site between April 2019 and June 2019 (EPA, 2023a
WESTON, 2017; WESTON, 2020).
Upon review of information obtained during these events, EPA determined that off-site sampling
of residential soils was required to adequately assess the site's eligibility for the NPL and expanded
the scope of the ongoing SI to include a residential sampling component. Planning and execution
of the residential sampling required working around COVID-19 and residential access constraints.
WESTON completed the residential soil sampling events between August 2022 and October 2022.
The Central Metal site has multiple listings in the Resource Conservation and Recovery Act
Information (RCRAInfo) system database including as: Central Metal Inc (Handler ID No.
CAR000214700) and U-Haul Moving & Storage of Alameda Corridors (Handler ID Nos.
CAC003161660 and CAC003241657); and Central Metal Inc (Handler ID: CAR000214700). No
process information or handler classification is listed in the database (EPA, 2023b).
1.3 Apparent Problem
EPA determined that an SI was needed at the Central Metal site because of the following apparent
problems:
¦ Between the late 1920s and the mid-1980s, the site was operated as a foundry and a
corrugated metal-tank manufacturing facility. Between the late 1980s and 2016, the site
was operated as a metal supply and industrial scrap metal recycling facility
(Brash, 2019; DTSC, 2016; JTT, 2012; UCSB, 2023; WEECO, 2014)
¦ Between 1999 and 2001, more than three tons of tetrachloroethylene (PCE) were
reported as being manifested from the site (DTSC, 2023a).
¦ Inspections conducted at the site by various state and local regulatory agencies resulted
in the issuance of numerous Notices of Violation (NOVs) as a result of poor
housekeeping, improper hazardous waste storage, and improper hazardous waste
disposal (DTSC, 2012; DTSC, 2016; WESTON, 2017).
¦ The site is situated in an area of known volatile organic compound (VOC)
contamination within the drinking water aquifers. The Miramonte well field is located
approximately 0.8 mile west-northwest from the site where municipal supply wells
have exhibited trichloroethylene (TCE) concentrations up to 25 micrograms per liter
(|ig/L) and PCE concentrations up to 1.5 |ig/L. The federal Maximum Contaminant
Level (MCL) for both PCE and TCE is 5.0 |ig/L (RWQCB, 2023a).
¦ In March 2011, a California Department of Toxic Substances Control (DTSC)
investigation at the site identified concentrations of metals, primarily lead and zinc, in
on-site debris piles that exceeded hazardous waste criteria (DTSC, 2011).
¦ In December 2018, a debris pile on the site was containerized into 21 large roll-off bins
and sampled under the direction of the local Certified Unified Program Agency
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CAN000903324 INTRODUCTION
(CUPA). The containerized material was classified as hazardous waste based on the
identified concentrations of arsenic, lead, and/or cadmium (Brash, 2019).
¦ A comprehensive analysis of historical aerial imagery indicated that former debris piles
at the site, including the pile that had been containerized in 2018, were typically
uncovered, or poorly covered. This information, in combination with local wind pattern
analysis and verbal accounts provided to EPA by near-site residents, indicated a
significant potential that fine-grained materials originating from historical on-site
debris piles could have migrated through the air and been deposited onto nearby
residential properties (Attachment 2; Google, 2023; WRCC, 2020).
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CAN000903324 SITE DESCRIPTION
2. SITE DESCRIPTION
2.1 Location and Description
(see Figure 1 through Figure 4)
The Central Metal site is located at 8201 Santa Fe Ave., Huntington Park, California. An additional
address, 8240 Marbrisa Ave, is also associated with the site property. The geographic coordinates
for the site are 33° 57' 47.31" North Latitude and 118° 13' 52.07" West Longitude. The site area
exceeded the 80th percentile in the United States for 10 of the 12 Environmental Justice (EJ) Indices
(EPA, 2023c; Google, 2023; LACA, 2023).
The site comprises nine Los Angeles County assessor parcels and occupies approximately
11.1 acres in a mixed industrial and residential area of unincorporated southern Los Angeles
County. The site is bordered to the north across Short Street by industrial businesses; to the west
across the Alameda Corridor by industrial businesses, with residential buildings of the
Florence-Firestone community beyond; to the south by an industrial recycling business; and to the
east across Santa Fe Avenue by commercial businesses and residential buildings of the Walnut
Park community. The southeastern portion of the site is bordered directly to the northeast by
single-family homes. Portions of both the Walnut Park and Florence-Firestone (also known as
Florence-Graham) residential communities in proximity to the site are composed primarily of
single-family residences situated on parcels that are typically less than 0.25 acre in size; however,
several multi-family and/or apartment complexes are also intermixed within the neighborhoods
(Appendix C; Google, 2023; LACA, 2023).
For the purposes of this SI, two distinct operational areas were designated within the site
boundaries based on the historical uses of the property. These areas are henceforth referred to as
the Former Tank Manufacturing Area (FTMA) and the Former Railroad Area (FRA). The FTMA
occupies approximately 4.0 acres at the northeastern portion of the site and includes five of the
nine site parcels: 6202-036-009 and 6202-037-004, -006, -009, and -010. The FRA occupies
approximately 7.1 acres at the southwestern portion of the site and includes the remaining four site
parcels: 6202-036-010, -011, -012, and -013 (Appendix C; Google, 2023; LACA, 2023).
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CAN000903324 SITE DESCRIPTION
The site is currently occupied by three primary structures, including the following (Appendix C;
Google, 2023; LAC A, 2023; UCSB, 2023; WESTON, 2017):
• An approximately 53,000 square foot (ft2) manufacturing and warehouse building
(Warehouse) at the east-central portion of the site. This building includes a maintenance
shop and hazardous waste storage area (HWSA) at the southern portion, and an
aboveground storage tank (AST) area at the northern portion. The Warehouse was first
constructed between 1923 and 1928 and expanded in multiple stages through the
mid-1940s.
• An approximately 2,500 ft2 office building (Main Office) at the northeast corner of the site.
The Main Office was constructed between 1923 and 1928.
• A stormwater treatment system at the southwestern corner of the site, which was installed
in approximately 2008.
Historically, the Warehouse included an additional approximately 62,000 ft2 extension to the west
of the current structure, which was reportedly demolished in 1988, and a small scale house to the
north, which was removed in mid-2021. Railroad tracks bisected the property in a generally
southeastern to northwestern direction until they were abandoned in the late 1990s, likely
concurrent with the construction of the adjacent Alameda Corridor, and subsequently removed in
the early 2000s. A railroad depot and associated structures were formerly located on the
northwestern portion of the site from at least the late 1800s through approximately the mid-1960s.
Prior to the installation of the existing stormwater treatment system, a historical stormwater
treatment system was located at the north-central portion of the site (Google, 2023; LAC A, 2023;
LAPL, 2023; UCSB, 2023, WEECO, 2014).
Based on aerial imagery, numerous large scrap metal waste and debris piles, as well as various
pieces of heavy equipment (e.g., metal sorters, metal crushers, excavators) were located on the
property between at least 2003 and 2018. These piles, which were generally confined to the FTMA
from 2003-2007 and from 2012-2018, appeared to encompass areas up to a 0.5 acre and to be
several stories in height. The specific materials that comprised the various piles are not known;
however, it is estimated that they were primarily a combination of metal and debris generated
during metal recycling operations (Attachment 2; Brash, 2019; DTSC, 2011; Google, 2023).
The site is entirely fenced, and the surface of the site is entirely covered in pavement or buildings.
However, prior to approximately 2007, the western portion of the site was unpaved. During SI
investigative efforts conducted by EPA in April 2019 and June 2019, the concrete slab was found
to vary from approximately 18 inches to 48 inches (Appendix C; Google, 2023).
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CAN000903324
2.2 Operational and Regulatory History
2.2.1 Operational History
(see Table 1)
September 2023
SITE DESCRIPTION
The National Tank & Manufacturing Company (National Tank) presumably owned the FTMA
portion of the Central Metal site from approximately the late 1920s through the mid-1980s.
Historical ownership information of the FTMA prior to the late 1920s is not known. By 1989, the
five FTMA parcels were owned by David Miller doing business as Damille Metal Supply, Inc.
(DMS). In approximately 2002, Jong Uk Byun, doing business as Central Metal, Inc. (CMI),
purchased the FTMA parcels and, in approximately 2004, purchased the remaining four Former
Railroad Area (FRA) parcels. On December 31, 2021, the entirety of the site was purchased by the
current corporate owner, 8201 Santa Fe (CA) LLC, a subsidiary of AMERCO Real Estate
Company, a subsidiary of U-Haul® Holding Company (formerly AMERCO). Historical ownership
information of the FRA is not known; however, these parcels were presumably owned by the
Southern Pacific Railroad (SPRR) and its related entities (Appendix D; DTSC, 2023b,
Google, 2023; JTT, 2012; LACFD, 1999; LACFD, 2002; WCAB, 1984; WEECO, 2014).
The current number of workers that regularly occupy the site is not known; however, during on-site
SI activities in June 2019, up to a dozen administrative and/or maintenance workers were observed
at the facility (Appendix C).
National Tank & Manufacturing Company (National Tank) /Ace Foundry
National Tank was historically a manufacturer of corrugated metal water-and-oil tanks that
operated within the FTMA portion of the site from approximately the late 1920s through the
mid-1980s. The specific tank manufacturing operations and hazardous materials associated with
these operations are not known; however, the majority of operations are presumed to have occurred
within the existing Warehouse. A machine shop was located at the southern portion of the
Warehouse. Concurrent with National Tank operations, Ace Foundry operated within the former
westward extension of the Warehouse from at least 1938 to 1979, presumably conducting metal
casting activities. Ace Foundry operations included a cleaning room and a machine shop within
the southern portion of the former Warehouse extension. No additional information is known
regarding specific locations of foundry operations, use, or storage of hazardous substances, or if
Ace Foundry and National Tank operations were interconnected (JTT, 2012; WCAB, 1984;
WEECO, 2014).
Damille Metal Supply, Inc. (DMS)
Damille Metal Supply, Inc. (DMS) was an industrial scrap metal recycler that operated on the
FTMA portion of the site from approximately 1989 through the late 1990s or early 2000s.
Operations included buying and selling scrap metal, including at least aluminum, steel, copper,
and titanium. Scrap metals were sorted on site, sheared or cut, and shipped off site. Hazardous
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CAN000903324 SITE DESCRIPTION
waste manifests indicate that between 1999 and 2001, approximately 3.58 tons of PCE waste was
generated at the site. The origin of this organic waste is not known. No additional information is
known regarding specific activities or hazardous substances associated with DMS operations.
Additional businesses reported as using addresses associated with the site during the DMS
operational period include: L&S Metals; MCS, Inc.; and All Star Metals, Inc. Specific information
regarding these businesses is not known; however, it is presumed that they were conducting
activities related to scrap metal operations and were associated with DMS (DTSC, 2016;
LACFD, 1999; LACFD, 2002; WEECO, 2014).
Central Metal, Inc. (CMI)
Central Metal, Inc. (CMI) operated on the site as an industrial metal supply and scrap metal
recycling facility from approximately 2002 to 2016. CMI operations on the FRA portion of the
site began in approximately 2004. On-site activities included purchasing scrap metals from various
industries, primarily fabrication, manufacturing, and construction companies. Scrap metals were
then sorted, cleaned, and cut or shredded into compact sizes for domestic and/or international
shipment. Recycled metals included at least steel, aluminum, copper, brass, and stainless steel. The
facility also received, stored, and resold electronic waste (e-waste) such as computer monitors,
desktop towers, batteries, and other computer parts. Spent automobile batteries, hydraulic oil,
motor oil, antifreeze, gasoline, and diesel fuel were stored on site. Historically, stormwater runoff
from the site was reportedly treated at the northern portion of the facility before being discharged
to the municipal stormwater system on Short Street. Beginning in approximately 2008, stormwater
runoff was treated in a system located at the southwestern corner of the site and subsequently
discharged to Alameda Street. The facility was "shuttered" in approximately July 2016 after failing
to acquire a new Conditional Use Permit from Los Angeles County. Between approximately early
2020 and late 2021, the facility was used to store cargo shipping containers by an unknown
operator, presumably under an agreement with CMI (Appendix C; Brash, 2019; DTSC, 2016;
Google, 2023; LACFD, 2005; WEECO, 2014).
Based on aerial imagery and historical investigation reports, numerous large debris piles were
located on the property between at least 2003 and 2018. These piles, which were generally
confined to the FTMA portion of the site from 2003-2007 and from 2012-2018, included bulk and
fine metal debris, e-waste, and floor sweepings. The piles encompassed areas up to 0.5 acre and
were several stories in height. All piles were removed from the facility between 2018 and 2020.
Although the specific materials that comprised all the various piles are not known, previous
investigations that included sampling of on-site piles indicated elevated concentrations of
hazardous metals and other compounds including, but not limited to, petroleum hydrocarbons and
polychlorinated biphenyls (PCBs) (Attachment 2; Brash, 2019; DTSC, 2011; Google, 2023).
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CAN000903324 SITE DESCRIPTION
Southern Pacific Railroad (SPRR)
The FRA portion of the site was used for railroad operations by the Southern Pacific Railroad
(SPRR) since at least 1875 and potentially since the late 1860s. Southern California's first railroad,
the Los Angeles & San Pedro Railroad, was completed in 1869 and connected Los Angeles to the
port at Wilmington. In 1872, SPRR acquired the railroad and completed the construction of the
Santa Ana Branch line in 1875. The new branch connected the original branch line, the Wilmington
Branch, to the cities of Anaheim, and later, Santa Ana. The Santa Ana Branch line bisected the
site and junctioned with the Wilmington Branch, which ran parallel to the western edge of the site,
at the northwestern corner of the site. An alternative junction was located approximately 0.25 mile
south of the site. By 1896, a railroad depot had been constructed immediately south of the branch
line junction at the northern portion of the FRA, which was originally named Florence Station and
later changed to Firestone Park Station. Various railroad-related buildings were located within this
area and included small offices and transloading buildings. The railroad buildings were removed
in stages between the late 1950s and the early 1970s and the rail lines, both the on-site and
adjacent-west branch segments, were abandoned and removed in the late 1990s and early 2000s,
presumably due to the construction of the subgrade Alameda Corridor (LAPL, 2023;
Spitzzeri, 2019; UCSB, 2023; WEI, 2021b).
U-Haul
U-Haul® began operating at the site in early 2022 in a limited capacity and is currently proposing
to develop the property into a U-Haul Moving and Storage Store. Proposed on-site activities
include self-storage, warehousing, truck and trailer rentals, maintenance of U-Haul vehicles, and
retail sales. The project would include the demolition of the existing Main Office and stormwater
treatment systems, the modification of the existing Warehouse into a truck rental area, and the
construction of several new buildings including: an approximately 57,000 ft2 single-story storage
building at the northeastern portion of the site, an approximately 42,000 ft2 four-story self-storage
building at the southwestern portion of the site, and an approximately 29,000 ft2 two-story vehicle
repair building at the southeastern portion of the site (DTSC, 2023b).
2.2.2 State and Local Regulatory History
2.2.2.1 State of California
The Central Metal site is listed in the California Environmental Protection Agency, Department of
Toxic Substances Control's (DTSC) Envirostor database as of September 2023. The site is listed
in the database as: U-Haul Moving & Storage of Alameda Corridors (Damille Metal Svc - Central
Metals, Inc. (Envirostor ID: 60002329), addressed at 8201 Santa Fe Ave. The site is listed as a
Voluntary Agreement site that was derive as of April 26, 2023 (DTSC, 2023c).
In 2012, DTSC issued an Enforcement Order for Central Metal, Inc. in regard to violations of the
California Health and Safety Code and the California Code of Regulations. During DTSC's March
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2011 inspection of the site, it was documented that the facility had generated two piles of
contaminated materials consisting of finely divided heavy metals and e-waste debris generated
through the metal recycling operations. The facility failed to minimize and properly containerize
leaking hazardous waste from broken battery cases, broken e-wastes, oily wastes and sludges, and
heavy metal dusts inside and outside the facility. The facility complied with DTSC's requirement
to remove and properly dispose of the two contaminated soil piles at an authorized facility; more
than 430 tons of contaminated soil was reported on waste manifests in 2011 (DTSC, 2012;
DTSC, 2023a).
In August 2016, DTSC completed a Site Screening of the site for EPA as part of the
Slauson-Alameda-Gage (SAG) Groundwater Discovery Project, which was focused on locating
potential sites contributing to the area's groundwater VOC contamination. Based on this screening,
EPA determined that further assessment was needed (DTSC, 2016).
In May 2023, DTSC entered into a California Land Reuse and Revitalization Act (CLRRA)
Agreement with the current corporate owner of the site, 8201 Santa Fe (C A), LLC, for the purposes
of conducting additional environmental assessment and remediation, as needed (Docket No.
HAS-FY22/23-116). A CLRRA agreement is a type of Voluntary Oversight Agreement offered
by DTSC that provides limited liability protection for a bona fide purchaser, bona fide prospective
purchaser, innocent landowner, contiguous property owner, or a ground tenant of a property if
specific eligibility criteria are met (DTSC, 2023b).
The site is not listed in Regional Water Quality Control Board's (RWQCB's) GeoTracker database
as of September 2023 (RWQCB, 2023b).
2.2.2.2 County of Los Angeles
The Los Angeles County Department of Public Works (LADPW) has issued numerous NOVs to
the site. In 2004, 2005, and 2008 NOVs were issued for operating an unpermitted stormwater
filtration system. An April 2016 Stormwater Certificate of Inspection noted that the facility was
operating a permitted stormwater treatment system; however, the certificate was not re-issued due
to deficient best management practices that consisted of inadequate employee training and
inadequate filters within the treatment system. It is unknown if the facility complied and was
re-issued the stormwater certificate (LADPW, 2004; LADPW, 2005; LADPW, 2008a;
LADPW, 2008b; LADPW, 2016).
The local CUP A, which is the Los Angeles County Fire Department, Health Hazardous Materials
Division (HHMD), has conducted numerous inspections on the site. In 1995, HHMD issued an
NOV for inadequate waste disposal, inadequate hazardous materials storage, inadequate training,
and inadequate maintenance of manifests. In 2005, HHMD issued an NOV for inadequate
hazardous waste labeling and management, poor housekeeping, inadequate hazardous waste
storage, and lack of required permits. In 2009, HHMD issued an NOV for poor housekeeping,
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improper labeling, inadequate hazardous waste storage, and improper employee training. In 2014,
HHMD issued an NOV for failure to properly label hazardous waste accumulation containers,
failure to dispose of hazardous waste within 180 days, and failure to properly close hazardous
waste containers (LACFD, 1995; LACFD, 1999; LACFD, 2005; LACFD, 2009; LACFD, 2014).
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3. INVESTIGATIVE EFFORTS
3.1 Previous Investigations
3.1.1 Non-Regulatory Investigations
3.1.1.1 2000 Subsurface Soil Investigation
In March 2000 and April 2000, a subsurface soil investigation was conducted within the FTMA,
which is the first known environmental investigation conducted at the site. It is not known on
whose behalf this investigation was conducted or whether any oversight was conducted by a local
regulatory agency. During the investigation, nine borings were advanced to a total depth of 20 feet
(ft) below ground surface (bgs). Three of the borings were located within the east-central portion
of the Warehouse, one was located within the northwest portion of the Warehouse, three were
located immediately southwest of the Warehouse adjacent to the maintenance shop, and two were
located in the current scrap pile area at the central portion of the site. The total number of samples
collected during the investigation is not known. Select samples were analyzed for total petroleum
hydrocarbons (TPH), VOCs, metals, and PCBs. Reportedly, relatively low concentrations of TPH
were identified in the 15 ft-bgs sample collected from the maintenance area at the southern side of
the Warehouse. No additional samples reported detectable concentrations of the analyzed
substances. The specific sampling program, including sampling methodology and analytical
results are unknown (WEECO, 2014).
3.1.1.2 2001 CMi Subsurface Soil Investigation
In April 2001, CMI advanced four borings across the central and north-central portions of the
FTMA to a total depth of 20 ft-bgs. Soil matrix samples were collected at 5 and 10 ft-bgs within
each boring, resulting in a total of 10 field samples that were submitted for TPH and VOC analyses.
Samples were collected in brass tubes using a slide hammer sampler. The 6-inch brass tubes were
sealed using Teflon® sheeting and plastic caps. All samples were reported as "non-detect" for TPH
and VOCs; however, the utilized sample collection methodology is not currently considered
acceptable for VOC analysis due to the increased potential for contaminant volatilization. Samples
were not submitted for metals analysis (WEECO, 2014).
3.1.1.3 2003 CMI Subsurface Soil Investigation
In December 2003, CMI advanced 16 borings across the FRA to a total depth of 30 ft-bgs. The
specific locations of the borings are not known; however, four of the borings were reportedly
advanced adjacent to the "previous railroad track" area whereas the remaining 12 were advanced
within the "vacant lot" area. Within each boring, soil matrix samples were generally collected at
10 ft-bgs, 20 ft-bgs, and 30 ft-bgs. Forty-seven samples were collected, and 32 of these samples
were submitted for TPH and VOC analysis. The remaining 15 samples were screened on-site using
a photoionization detector (PID). Samples were collected in brass tubes using a slide hammer
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sampler. The 6-inch brass tubes were sealed using Teflon® sheeting and plastic caps. All samples
were reported as "non-detect" for TPH and VOCs; however, the utilized sample collection
methodology is not currently considered acceptable for VOC analysis due to the increased
potential for contaminant volatilization. Samples were not submitted for metals analysis.
Groundwater was not encountered during the investigation (WEECO, 2014).
3.1.1.4 2004 CMI Subsurface Soil Investigation
In September 2004, CMI advanced an additional five borings within the FRA to a total depth of
10 ft-bgs. The specific locations of the borings are not known; however, it was reported that they
were advanced adjacent to the "previous railroad track area." Soil matrix samples were collected
at 5 ft-bgs and 10 ft-bgs within each boring, resulting in a total of 10 field samples that were all
submitted for TPH and VOC analysis. Samples were collected in the direct-push acetate liners.
The liners were cut and sealed using Teflon sheeting and plastic caps. All samples were reported
as "non-detect" for TPH and VOCs; however, the utilized sample collection methodology is not
currently considered acceptable for VOC analysis due to the increased potential for contaminant
volatilization. Samples were not submitted for metals analysis (WEECO, 2014).
3.1.1.5 2010 CMI Debris Pile Classification Sampling
In September 2010, CMI collected four solid matrix samples from two distinct on-site debris piles.
The specific sampling methodology or sample locations are not known. Samples were reportedly
analyzed for VOCs, TPH, and soluble metals. The specific analytical results are not known;
however, all four of the samples reportedly exhibited soluble lead concentrations that exceeded
state hazardous waste criteria with a maximum sample concentration of 50 milligrams per liter
(mg/L). Both the Toxicity Characteristic Leaching Procedure (TCLP) and Soluble Threshold Limit
Concentration (STLC) hazardous waste criteria for lead are 5 mg/L (DTSC, 2011).
3.1.1.6 2021 CMI Phase II Sampling
(see Table 2)
In September 2021, CMI advanced 14 soil borings, SV-21 through SV-34, within the FRA to a
total depth of 15 ft-bgs. Within each boring, soil vapor probes were installed at 5 ft-bgs and
15 ft-bgs and soil matrix samples were collected at 2 ft-bgs, 5 ft-bgs, and 15 ft-bgs. An additional
soil matrix sample, P-l, was collected from a depth of 6 inches within an area of exposed soil at
the central portion of the site; the origin of this area of exposed soil is not known (e.g., machinery
foundation excavation, etc.); however, it appears to have been formerly occupied by a debris pile.
Soil vapor sampling and analyses was performed on-site using a mobile laboratory with all samples
analyzed for VOCs and fuel oxygenates. Shallow soil matrix samples were initially analyzed for
CAM 17 metals analysis (also known as Title 22 metals) with deeper samples only analyzed in
borings where the shallow sample exhibited elevated concentrations. Soil matrix samples collected
from borings that exhibited detectable concentrations of VOCs in soil vapor were also analyzed
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for VOCs. In addition, select soil matrix samples underwent solubility analysis where total metals
concentrations exceeded assigned thresholds (WEI, 2021b).
The most elevated metal concentrations were generally exhibited in the near-surface soil sample,
P-l, and included, but were not limited to: antimony (46 milligrams per kilogram [mg/kg]), arsenic
(28 mg/kg), barium (2,600 mg/kg), cadmium (29 mg/kg), chromium (200 mg/kg), copper
(5,700 mg/kg), lead (3,600 mg/kg), mercury (9.6 mg/kg), nickel (500 mg/kg), silver (5.7 mg/kg),
and zinc (20,000 mg/kg). Based on the metals results of the 2 ft-bgs boring samples, three 5 ft-bgs
samples were additionally analyzed and no 10 ft-bgs samples were analyzed. Five of the 17
analyzed boring samples exhibited an arsenic concentration greater than 14 mg/kg, with a
maximum result of 78 mg/kg at boring SV-28 (west-central portion of FRA). Eight of the 17
analyzed boring samples exhibited a lead concentration greater than 41 mg/kg, with a maximum
result of 190 mg/kg at boring SV-27 (east-central portion of FRA) (WEI, 2021b).
VOCs identified in the soil vapor survey included, but are not limited to, PCE, Freon 113, toluene,
and total xylenes. Of the detected analytes, only PCE exhibited at concentrations exceeding
corresponding EPA Vapor Intrusion Screening Levels (VISLs), which occurred in 7 of the 28
samples. PCE was detected in all soil vapor samples and ranged from 10 micrograms per cubic
meter (|ig/m3) to 1,340 |ig/m3; shallower samples were generally more elevated than deeper
samples. The maximum concentrations were identified in the samples collected from SV-21
(northwest portion of FRA) that exhibited 1,340 |ig/m3 (5 ft-bgs sample) and 1,290 |ig/m3
(15 ft-bgs sample). Based on the soil vapor data, twelve soil matrix samples were selected and
submitted for VOC analysis. Benzene was the only VOC detected in the submitted samples and
was identified in a single sample at a concentration of 4.9 micrograms per kilogram (|ig/kg); the
residential Regional Screening Level (RSL) for benzene is 1,200 |ig/kg. The Resident and
Commercial VISLs (May 2023) for PCE are 360 |ig/m3 and 1,570 |ig/m3, respectively
(WEI, 2021b).
3.1.2 State and Local Regulatory Agency Investigations
3.1.2.1 2011 DTSC Debris Pile Sampling Investigation
(see Table 3)
In January 2011, DTSC received a complaint from local residents in the vicinity of the Central
Metal site who were concerned that metal dusts from the facility may be impacting their properties.
In March 2011, DTSC, accompanied by staff of the South Coast Air Quality Management District
(AQMD) and HHMD, conducted an inspection of the site. During the inspection, DTSC collected
five aqueous matrix (i.e., liquid, sludge, and sediment) samples from both on site and immediately
off site, as well as 11 solid matrix samples from two distinct on-site debris piles, although the
specific locations of these piles are unknown. All samples were analyzed for metals (both total and
soluble) with a subset also being analyzed for TPH, mercury, and PCBs. Analytical results
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indicated that four of the five aqueous matrix samples exhibited soluble lead concentrations that
exceeded state hazardous waste criteria, and one or more samples also exceeded the waste criteria
for TPH, PCBs, and/or mercury. All solid matrix samples exhibited lead and zinc concentrations
that exceeded hazardous waste criteria (both total and solid) with one sample also exceeding the
soluble waste criteria for cadmium (DTSC, 2011; WEI, 2021a).
3.1.2.2 2017-2018 CUP A Debris Pile Investigation
(see Table 4)
In September 2017, the local CUP A, HHMD, collected a single solid matrix sample from an on-site
debris pile during a routine inspection. The sample reportedly exhibited concentrations of both
total lead and total zinc that exceeded the state hazardous waste criteria. However, neither the
specific sample collection location nor the full analytical results are known. In December 2018,
CMI, at the direction of HHMD, containerized the sampled pile into 21 roll-off bins and collected
additional solid matrix samples for waste classification purposes that were analyzed for total
metals. CMI conducted a statistical analysis of the analytical results and reported to HHMD that
7 of the 21 bins could be classified as hazardous waste based on total arsenic concentrations.
Subsequently, the samples collected from the remaining 14 bins were additionally analyzed for
soluble metals, which indicated that all 14 additional bins could be classified as hazardous waste
based on soluble lead concentrations. One of the 14 bins also exceeded the soluble hazardous waste
criteria for cadmium (Brash, 2019).
3.1.3 Previous Federal Regulatory Agency Investigations
No known previous federal regulatory agency sampling investigations have been conducted at the
Central Metal site.
3.2 Site Inspection (SI) Sampling
Between April 2019 and October 2022, WESTON®, on behalf of EPA, conducted the SI sampling
events at the Central Metal site. The Stage 1 SI sampling event (April 2019) included soil vapor
sampling and subsurface soil matrix sampling. The primary objective of the Stage 1 event was to
collect screening-level analytical data to support planning decisions for the subsequent Stage 2
event. The Stage 2 SI sampling event (June 2019) included subsurface soil matrix source sampling
and groundwater release sampling. The primary objective of the Stage 2 investigation was to
document information to be used in the HRS characterization process including additional source
areas and levels of contamination in site soils and groundwater.
In August 2022, the Stage 3 SI Residential sampling event was completed, which included
four-point composite soil matrix release sampling and Incremental Sampling Methodology (ISM)
non-discrete soil sampling. The Stage 3 SI Background sampling event (October 2022) included
four-point composite and ISM shallow soil matrix background sampling. A more detailed
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description of these sampling methodologies is provided in the Stage 3 Sampling and Analysis
Plan (SAP) (Attachment 4). The primary objective of the Stage 3 investigation was to determine
if residential properties downwind of the site exhibited elevated concentrations of hazardous
metals in near-surface soils and, if so, determine if at least some portion of this contamination was
a result of historical on-site activities.
Sampling methodology, locations, analyses, and analytical results are summarized below. The
SAP for the Stage 1 and Stage 2 sampling events was approved by EPA in October 2018, and the
SAP for the Stage 3 event was approved by EPA in June 2021. The Stage 1 and 2 SAP and the
Stage 3 SAP are provided in Attachment 3 and Attachment 4, respectively.
Based on the historical use of the site and the previous sampling events described in Section 3.1,
the following contaminants of concern (COCs) were identified at the site: metals (specifically
arsenic, cadmium, and lead) and VOCs (specifically PCE). In addition, based on the analytical
results from the Stage 1 and Stage 2 portions of the SI investigation, additional COCs were
identified including, but not limited to, the following: cobalt, copper, silver, zinc, 2-butanone (also
known as methyl ethyl ketone [MEK]), acetone, bromodichloromethane (BDCM), carbon
tetrachloride, methylene chloride (also known as dichloromethane), and m,p-xylene.
All Stage 1 soil vapor samples were analyzed for VOCs on-site during the sampling event by H&P
Mobile Geochemistry, Inc., a WESTON®-contracted mobile laboratory, using EPA Method H&P
8260SV (modified SW-846 Method). All Stage 1 subsurface soil matrix samples were submitted
under the EPA Contract Laboratory Program (CLP) to Bonner Analytical Testing Co. (Bonner)
for CLP Metals analysis using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and
Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) (copper only) by EPA
CLP Analytical Services (CLPAS) ISM02.4. Due to trace metal interference identified within a
single sample delivery group, samples within that group were re-analyzed using ICP-AES for all
metal constituents (including copper) and only the revised results are discussed below.
All Stage 2 subsurface soil matrix and groundwater samples were submitted under the EPA CLP
to Bonner for CLP Metals analysis (using ICP-AES) by EPA CLPAS ISM02.4 or to Chemtech
Consulting Group for CLP Trace Volatiles analysis (groundwater) and CLP Low and Medium
Volatiles (soil) by EPA CLPAS SOM02.4.
All Stage 3 near-surface residential soil matrix data were submitted to Eurofins Environment
Testing - Tacoma and analyzed for CAM 17 metals (including mercury) (using ICP-AES) by EPA
Method 6010b and EPA Method 7471a (using Cold Vapor Atomic Absorption [CVAA]). ISM
samples were processed at the laboratory in accordance with Interstate Technology Regulatory
Council (ITRC) ISM-2 (October 2020) prior to analysis.
WESTON® validated the soil vapor data (Stage 1) and the near-surface soil matrix data (Stage 3)
internally. The EPA Region 9 Quality Assurance (QA) Office validated the subsurface soil matrix
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(Stage 1 and Stage 2) and groundwater (Stage 2) data. The complete validated analytical results
are presented in Attachment 7.
3.2.1 Action Levels
In accordance with the HRS, the action levels to establish an observed release to groundwater or
an area of observed soil contamination (AOC), as well as to establish an on-site source of
contaminated soil, are "significantly above background" concentrations. "Significantly above
background" is defined as three times the background concentration for all media. If the
background concentration is below the analytical quantitation limit, then the default background
level is the background sample quantitation limit (SQL). "Significantly above background" for
this scenario is defined as a detect in the media (i.e., concentration at or above the SQL) where the
analyte was not detected in the background media. In accordance with EPA, 1996 (Using Qualified
Data to Document an Observed Release and Observed Contamination), qualified data
(e.g., J-flagged) may be used to document an observed release or observed contamination by
chemical analysis under the HRS by the application of specific adjustment factors to the data (see
Attachment 10).
3.2.1.1 Source Action Level
(Groundwater Pathway) (see Table 6)
Soil matrix samples collected from Boring DMS-DP-10, which is located at the northeastern
portion of the site, approximately 70 ft southwest of the Main Office and 70 ft north of the
Warehouse, are designated as the source background soil samples for HRS purposes. Although the
selected source background location is situated within the operational area of the site, the exhibited
analyte concentrations in samples collected from this location appear unlikely to have been
significantly impacted by on-site historical operations. An on-site source of hazardous materials,
typically contaminated subsurface soils, must be established in order to assess whether a site has
impacted, or has the potential to impact, underlying groundwater.
The assigned source background concentration for each analyte was determined by amalgamating
the concentration data from each of the four discrete-depth soil samples. For any analyte with a
reported SQL exceedance in the dataset, the background concentration was conservatively
assigned as the arithmetic mean of the SQL-exceeding discrete-depth results plus three times the
sample standard deviation of these results. For any analyte without an SQL exceedance, the
background concentration was conservatively assigned as the maximum SQL value for that analyte
within the combined Stage 1 and Stage 2 datasets.
VOC analytes were not reported at concentrations above their respective SQLs in any of the four
discrete-depth source background soil samples. All antimony results reported for the source
background soil samples were qualified as "rejected" due to a matrix spike recovery outside of QA
criteria preventing the assigning of either a source background concentration or source action level
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for antimony in soil; however, antimony was not reported above SQLs within the Stage 1 or Stage
2 datasets. Metal analytes within the dataset that are not included within the Superfund Chemical
Data Matrix (SCDM); specifically, calcium, magnesium, potassium, and sodium; were not
assigned source action levels or evaluated as potential hazardous substance sources.
3.2.1.2 Groundwater Release Action Level
(Groundwater Pathway)
No groundwater monitoring wells are located on the Central Metal site. The nearest known
monitoring wells to the site are located on the adjacent-south Jack Engle & Company site (northern
parcel). Data collected from the seven-well monitoring network between approximately 1998 and
2010 have indicated a relatively low horizontal hydraulic gradient and a variable shallow
groundwater flow direction; predominately from south-southeast to southwest. As such, the
shallow groundwater flow direction beneath the Central Metal site is considered to be inadequately
defined and, therefore, neither a background groundwater location nor a groundwater release
action level can currently be assigned.
3.2.1.3 HRS Soil Screening Benchmark
(Soil Exposure Pathway) (see Fisure 11 and Table 9)
Soil samples collected during the October 2022 Stage 3 Background Sampling Event were used to
assign HRS soil screening benchmarks for metals in shallow soils. These project-specific
benchmarks were used as the criteria to determine if metal concentrations identified in residential
soils exceeded the HRS threshold of "significantly above background." This event included the
sampling of shallow soil samples within five designated background zones. These zones
encompassed a variety of land-use settings including: two public parks, two road verges
(e.g., parkway, greenbelt), and a tract of former residential lots that were being redeveloped into a
new public park. These zones were all located within 1 mile of the site and were specifically
selected to facilitate the estimation of an ambient urban metal concentration within shallow soil in
the vicinity of the site. At each background zone, shallow soil samples were collected using ISM
and four-point composite methodologies. The ISM analytical data was then averaged, first by zone,
then by land-use type, and finally across all zones, to establish estimated background soil
concentrations.
3.2.2 2019 EPA Stage 1 SI - Soil Vapor and Limited Soil Sampling
In April 2019, WESTON®, on behalf of EPA, conducted the Stage 1 SI sampling event at the
Central Metal site. The Stage 1 event included soil vapor and soil matrix sampling at 20 non-biased
sampling locations located across the site (SV-1 through SV-20), predominantly within the FTMA.
The primary objective of the Stage 1 portion of the investigation was to provide information on
the relative concentrations of metals and VOCs across the site to assist in the selection of
subsequent on-site soil matrix and groundwater sampling (i.e., Stage 2). However, when used in
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combination with the source action levels assigned, subsequent to the Stage 2 event
(see Section 3.2.1) the Stage 1 metals results can also be used under the HRS to establish hazardous
substance source areas at the site.
Between April 8 and April 11, 2019, 37 soil vapor probes were installed across the site, which
were subsequently analyzed using a WESTON-subcontracted mobile laboratory. The probes were
installed at two distinct depths (approximately 5 ft-bgs and 15 ft-bgs) using direct-push (DP)
technology. In addition, 38 soil matrix samples (not including duplicate or QA samples) were
collected during the investigation. Soil samples were collected from depths of approximately
2 ft-bgs and 10 ft-bgs at each location and submitted to a fixed laboratory for metals analyses. Due
to refusal issues, a soil vapor sample could not be collected from either of the targeted depths at
SV-6 or from the 15-ft targeted depth at SV-13, and soil matrix samples could not be collected
from the 10-ft targeted depths at either location.
3.2.2.1 Stage 1 Soil Vapor Results for VOCs
(see Figure 5 and Table 5)
Numerous VOC analytes were identified at detectable concentrations during the survey. Although
soil vapor benchmarks are not applicable within the HRS, for contextual purposes, the soil vapor
data collected during the investigation are compared to the May 2023 EPA Resident and
Commercial Sub-slab and Near source Soil Gas VISLs. Three analytes, BDCM, carbon
tetrachloride, and PCE, exceeded their respective Resident VISLs with BDCM and PCE also
slightly exceeding their respective Commercial VISLs. TCE was not detected above reporting
limits during the survey.
The maximum BDCM concentration of 13 |ig/m3 was identified in the 6 ft-bgs sample collected
from SV-20 (southern portion of the FRA). The Resident and Commercial VISLs for BDCM are
2.5 |ig/m3 and 11 |ig/m3, respectively.
The maximum carbon tetrachloride concentration of 18 |ig/m3 was identified in the 6 ft-bgs sample
collected from SV-10 (northwestern portion of the Warehouse). The Resident and Commercial
VISLs for carbon tetrachloride are 16 |ig/m3 and 68 |ig/m3, respectively.
The maximum PCE concentration of 2,530 |ig/m3 was identified in the 6.5 ft-bgs sample collected
from SV-14 (central portion of the Warehouse). The 16 ft-bgs sample from this location exhibited
a PCE concentration of 2,190 |ig/m3. PCE was identified in 34 of the remaining 35 samples with
concentrations that ranged from 8.0 |ig/m3 to 339 |ig/m3. The Resident and Commercial VISLs for
PCE are 360 |ig/m3 and 1,570 |ig/m3, respectively.
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3.2.2.2 Stage 1 Soil Sampling Results for Metals
(see Figure 6 and Table 6)
Metals identified at concentrations at or above their corresponding source action level in soil
matrix source samples collected during the Stage 1 sampling event include arsenic, cadmium,
cobalt, copper, lead, silver, and zinc. The most elevated metal concentrations identified during this
event were generally exhibited in the 2 ft-bgs samples collected from adjacent west to the
Warehouse and within the southern portion of the Warehouse. For contextual purposes, these
results are also compared to the May 2023 EPA Residential and Industrial RSLs; however, RSLs
are not appropriate for use as benchmarks under the HRS.
The assigned arsenic source action level of 14 mg/kg was exceeded by 2 of the 38 samples with a
maximum concentration of 22 mg/kg (qualified as estimated), which was exhibited in the 2 ft-bgs
sample collected from SV-12. The 2 ft-bgs sample collected from SV-13 exhibited an arsenic
concentration of 16 mg/kg (qualified as estimated). The Residential and Industrial RSLs for arsenic
are 0.68 mg/kg and 3.0 mg/kg, respectively.
The assigned cadmium source action level of 0.66 mg/kg was exceeded by 4 of the 38 samples
with a maximum concentration of 2.5 mg/kg, which was exhibited in the 2 ft-bgs sample collected
from SV-6. No deep sample was collected from SV-6 due to early refusal. The 2 ft-bgs samples
collected from SV-9, SV-17, and SV-19 exhibited cadmium concentrations of 1.3 mg/kg (qualified
as estimated), 1.4 mg/kg, and 1.1 mg/kg, respectively. The Residential and Industrial RSLs for
cadmium are 7.1 mg/kg and 100 mg/kg, respectively.
The assigned cobalt source action level of 69 mg/kg was exceeded by 1 of the 38 samples with a
concentration of 91 mg/kg, which was exhibited in the 2 ft-bgs sample collected from SV-9. The
Residential and Industrial RSLs for cobalt are 23 mg/kg and 350 mg/kg, respectively.
The assigned copper source action level of 111 mg/kg was exceeded by 4 of the 38 samples with
a maximum concentration of 165 mg/kg (qualified as estimated), which was exhibited in the
2 ft-bgs sample collected from SV-12. The 2 ft-bgs samples collected from SV-6, SV-9, and SV-17
exhibited copper concentrations of 133 mg/kg (qualified as estimated), 114 mg/kg, and 139 mg/kg,
respectively. The Residential and Industrial RSLs for copper are 3,100 mg/kg and 47,000 mg/kg,
respectively.
The assigned lead source action level of 41 mg/kg was exceeded by 5 of the 38 samples with a
maximum concentration of 338 mg/kg, which was exhibited in the 2 ft-bgs sample collected from
SV-6. No deep sample was collected from SV-6 due to early refusal. The 2 ft-bgs samples collected
from SV-9, SV-17, SV-18, and SV-19 exhibited lead concentrations of 170 mg/kg, 301 mg/kg
(qualified as biased high), 170 mg/kg (qualified as biased high), and 90 mg/kg (qualified as biased
high), respectively. The Residential and Industrial RSLs for lead are 400 mg/kg and 800 mg/kg,
respectively.
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The assigned silver source action level of 1.3 mg/kg was exceeded by 4 of the 38 samples with a
maximum concentration of 5.0 mg/kg, which was exhibited in the 2 ft-bgs sample collected from
SV-6. No deep sample was collected from SV-6 due to early refusal. The 2 ft-bgs samples collected
from SV-9, SV-12, and SV-13 exhibited silver concentrations of 4.3 mg/kg (qualified as
estimated), 2.4 mg/kg (qualified as estimated), and 1.4 mg/kg (qualified as estimated),
respectively. The Residential and Industrial RSLs for silver are 390 mg/kg and 5,800 mg/kg,
respectively.
The assigned zinc source action level of 450 mg/kg was exceeded by 3 of the 38 samples with a
maximum concentration of 778 mg/kg (qualified as biased high), which was exhibited in the
2 ft-bgs sample collected from SV-17. The field duplicate for this sample exhibited a zinc
concentration of 464 mg/kg (qualified as biased high). The 2 ft-bgs samples collected from SV-6,
and SV-19 exhibited zinc concentrations of 490 mg/kg (qualified as estimated) and 612 mg/kg
(qualified as biased high), respectively. The Residential and Industrial RSLs for zinc are 23,000
mg/kg and 350,000 mg/kg, respectively.
3.2.3 2019 EPA Stage 2 SI - Soil and Groundwater Sampling
In June 2019, WESTON®, on behalf of EPA, conducted the Stage 2 SI sampling event at the
Central Metal site. The Stage 2 event included both soil and groundwater sampling at
selectively-biased sampling locations located across the site with samples analyzed for VOCs and
metals. The primary objective of the Stage 2 portion of the investigation was to collect analytical
data from site soils and groundwater to determine if an on-site hazardous substance source existed
at the site and, if present, if it was a potential source of area-wide groundwater contamination.
Between June 17, 2019 and June 20, 2019, ten soil borings were advanced using DP technology
to a maximum depth of 17 ft-bgs, and five groundwater borings were advanced using Cone
Penetration Testing (CPT) technology to a maximum depth of 101 ft-bgs. Within each soil boring,
samples were collected from four distinct depths of approximately 2 ft-bgs, 5 ft-bgs, 10 ft-bgs, and
15 ft-bgs. Forty soil samples (not included duplicate or QA samples) were submitted for
fixed-laboratory VOC and metals analysis. Within each groundwater boring, a single groundwater
sample was collected from the top of the underlying Gaspur aquifer. No perched or semi-perched
water was identified between the ground surface and the top of the aquifer. Five groundwater
samples (not including duplicate or QA samples) were submitted for fixed-laboratory VOC and
total (i.e., not dissolved) metals analysis.
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3.2.3.1 Stage 2 Sampling Results for VOCs
(see Figure 8 and Table 8)
Stage 2 - VOC Results in Soil
The only VOC identified at a concentration at or above its corresponding source action level in
soil matrix source samples collected during the Stage 2 sampling event was acetone. Four
additional VOC analytes were identified at detectable concentrations during the event including
2-butanone (also known as MEK), methylene chloride (also known as dichloromethane),
m,p-xylene, and PCE. 2-butanone, acetone, and methylene chloride are common laboratory
contaminants. For contextual purposes, these results are also compared to the May 2023 EPA
Residential and Industrial RSLs; however, RSLs are not appropriate for use as benchmarks under
the HRS.
The assigned acetone source action level of 31 |ig/kg was exceeded by 2 of the 40 samples with a
maximum concentration of 93 |ig/kg (qualified as biased high), which was exhibited in the 3 ft-bgs
sample collected from DP-3. The 5 ft-bgs sample collected from DP-8 exhibited an acetone
concentration of 35 |ig/kg (qualified as biased high). The Residential and Industrial RSLs for
acetone are 70,000,000 |ig/kg and 1,100,000,000 ng/kg, respectively.
PCE was only identified in a single sample, which was collected from 2 ft-bgs at DP-6 (central
portion of Warehouse and adjacent to the maximum PCE result identified during the Stage 1 Soil
Vapor Survey). This sample exhibited a PCE concentration of 2.2 |ig/kg (qualified as estimated),
which was below the SQL of 6.6 |ig/kg. The assigned PCE source action level is 16 |ig/kg. The
Residential and Industrial RSLs for PCE are 24,000 |ig/kg and 100,000 |ig/kg, respectively.
Stage 2 - VOC Results in Groundwater
The only VOC analyte identified at a concentration at or above its corresponding SQL during the
Stage 2 sampling event was acetone. Additional VOC analytes identified at concentrations below
their SQL, but above their MDL, include 2-butanone (also known as MEK); benzene; carbon
disulfide; m,p-xylene; toluene; trans 1,2-dichloroethylene (trans-1,2-DCE); and TCE. For
contextual purposes, these results are also compared to the EPA MCLs, where applicable; although
MCLs are not appropriate for use as benchmarks to establish a hazardous substance release under
the HRS. Insufficient data was available to assign groundwater release action levels for the project
(see Section 3.2.1).
The maximum acetone concentration of 14 |ig/L was exhibited in the groundwater sample
collected from CPT-4. The samples collected from CPT-1, CPT-2, CPT-3, and CPT-5 exhibited
concentrations of 3.1 |ig/L (qualified as estimated), 4.6 |ig/L (qualified as estimated), 3.6 |ig/L
(qualified as estimated), and 5.1 |ig/L, respectively. Acetone does not currently have a published
MCL.
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Chlorinated VOCs were identified in 2 of the 5 groundwater samples collected during the event.
Trans-1,2-DCE was identified in the samples collected from CPT-2 and CPT-4 at concentrations
of 0.12 |ig/L (qualified as estimated) and 0.15 |ig/L (qualified as estimated), respectively. TCE
was identified in the sample collected from CPT-2, at a concentration of 0.21 |ig/L (qualified as
estimated). The SQL for both of these analytes in both of these samples is 0.50 |ig/L. The MCLs
for trans-1,2-DCE and TCE are 100 |ig/L and 5.0 |ig/L, respectively.
3.2.3.2 Stage 2 Sampling Results for Metals
(see Figure 7 and Table 7)
Stage 2 - Metal Results in Soil
Metals identified at concentrations at or above their corresponding action level in soil matrix
source samples collected during the Stage 2 sampling event include cadmium, copper, lead, silver,
and zinc. The most elevated metal concentrations identified during this event were generally
exhibited in the 2 ft-bgs sample collected from within the southern portion of the Warehouse. For
contextual purposes, these results are also compared to the May 2023 EPA Residential and
Industrial RSLs; however, RSLs are not appropriate for use as benchmarks under the HRS.
The assigned cadmium source action level of 0.66 mg/kg was exceeded by 4 of the 40 samples
with a maximum concentration of 7.6 mg/kg (qualified as estimated), which was exhibited in the
2 ft-bgs sample collected from DP-7. The 2 ft-bgs sample collected from DP-1 exhibited a
cadmium concentration of 1.1 mg/kg (qualified as estimated). The 2 ft-bgs and 5 ft-bgs samples
collected from DP-9 exhibited cadmium concentrations of 2.4 mg/kg (qualified as estimated) and
0.74 mg/kg (qualified as estimated), respectively. The Residential and Industrial RSLs for
cadmium are 7.1 mg/kg and 100 mg/kg, respectively.
The assigned copper source action level of 111 mg/kg was exceeded by 1 of the 40 samples with
a concentration of 245 mg/kg (qualified as estimated), which was exhibited in the 2 ft-bgs sample
collected from DP-7. The Residential and Industrial RSLs for copper are 3,100 mg/kg and
47,000 mg/kg, respectively.
The assigned lead source action level of 41 mg/kg was exceeded by 6 of the 40 samples with a
maximum concentration of 612 mg/kg, which was exhibited in the 2 ft-bgs sample collected from
DP-7. The 2 ft-bgs samples collected from DP-1, DP-2, DP-4, DP-8, and DP-9 exhibited lead
concentrations of 138 mg/kg, 138 mg/kg, 203 mg/kg, 49 mg/kg, and 152 mg/kg, respectively. The
Residential and Industrial RSLs for lead are 400 mg/kg and 800 mg/kg, respectively.
The assigned silver source action level of 1.3 mg/kg was exceeded by 4 of the 40 samples with a
maximum concentration of 1.9 mg/kg (qualified as estimated), which was exhibited in both the
2 ft-bgs sample collected from DP-7 and the 5 ft-bgs sample collected from DP-8. The 2 ft-bgs
samples collected from DP-1 and DP-8 exhibited silver concentrations of 1.7 mg/kg (qualified as
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estimated) and 1.3 mg/kg (qualified as estimated), respectively. The Residential and Industrial
RSLs for silver are 390 mg/kg and 5,800 mg/kg, respectively.
The assigned zinc source action level of 450 mg/kg was exceeded by 2 of the 40 samples with a
maximum concentration of 3,160 mg/kg, which was exhibited in the 2 ft-bgs sample collected
from DP-7. The 2 ft-bgs sample collected from DP-9 exhibited a zinc concentration of 661 mg/kg.
The Residential and Industrial RSLs for zinc are 23,000 mg/kg and 350,000 mg/kg, respectively.
Stage 2 - Metal Results in Groundwater
Metals identified at concentrations at or above their corresponding SQL in groundwater samples
collected during the Stage 2 sampling event include aluminum, arsenic, barium, beryllium,
cadmium, chromium, cobalt, copper, iron, lead, manganese, nickel, silver, vanadium, and zinc.
Human-health regulatory benchmarks, such as MCLs, are not appropriate for use as benchmarks
to establish a hazardous substance release under the HRS. Additionally, samples were analyzed
for total metals and, as such, analytical results are not comparable to regulatory benchmarks
derived from dissolved metals criteria, such as MCLs. Groundwater release action levels for the
project were not assigned due to insufficient information on the hydrogeologic conditions beneath
the site (see Section 3.2.1).
Total metal concentrations were generally found to be highest in the samples collected from CPT-2
(located at the west-central portion of the site) and CPT-4 (located at the southeastern corner of
the site). Specifically, samples collected from these locations generally exhibited total metal
concentrations approximately 10 to 20 times higher than those exhibited at the other three
groundwater sample locations. Total arsenic concentrations ranged from 28 |ig/L (qualified as
estimated) at CPT-3 to 100 |ig/L (qualified as estimated) at CPT-4. Total cadmium concentrations
ranged from non-detect (less than 5.0 |ig/L) at CPT-1 and CPT-5 to 50 |ig/L at CPT-2. Total cobalt
concentrations ranged from 51 |ig/L (qualified as estimated) at CPT-5 to 590 |ig/L at CPT-2. Total
lead concentrations ranged from 43 |ig/L at CPT-5 to 935 |ig/L (qualified as biased low) at CPT-4.
Total silver concentrations ranged from 4.5 |ig/L (qualified as estimated) to 63 |ig/L (qualified as
estimated) at CPT-4. Total zinc concentrations ranged from 476 |ig/L at CPT-5 to 33,300 |ig/L at
CPT-4.
3.2.4 2022 EPA Stage 3 SI - Residential Soil Sampling
3.2.4.1 Stage 3 SI - Residential Phase
(see Figure 9, Figure 10, Figure 12, and Figure 13 and Table 9 through Table 13)
Between August 2022 and October 2022, WESTON®, on behalf of EPA, conducted the Stage 3 SI
sampling event at the Central Metal site. The Stage 3 event, which was conducted in two phases,
included near-surface soil matrix sampling at both selectively biased and non-biased locations
within residential yards and publicly accessible spaces in the vicinity of the site. The first phase of
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the event, the residential phase, was focused on: collecting shallow soil release samples from
downwind residential properties to determine if hazardous concentrations of metals, primarily
arsenic and lead, were present; and to evaluate the spatial distribution of identified metals
contamination to determine if the impacts were attributable to historical activities at the Central
Metal facility. The second phase of the event, the background phase, was focused on collecting
shallow soil from public spaces, primarily parks and road verges, in areas outside of the potential
influence of potential contamination originating from the site and in a variety of directions from
the site.
Prior to completing the first phase of the event, the site-adjacent residential neighborhoods were
assessed based on their potential risk of being impacted by airborne deposition originating from
the site, specifically with respect to distance and downwind direction. The portions of these
neighborhoods deemed to be most at risk were divided into four residential zones (RZs) based on
distance from the site and wind direction. Three zones (RZ-1 through RZ-3) were delineated within
the Walnut Park neighborhood, which is located downwind with respect to the primary wind
direction, and one zone (RZ-4) was delineated within the Florence-Firestone neighborhood, which
is located downwind with respect to the secondary wind direction. Each RZ was further subdivided
into three residential subzones (sub-RZs) based on proximity to primary and secondary wind
directions, resulting in twelve sub-RZs, each comprised of approximately 40 residential properties.
Subsequently, a comprehensive desktop review was completed to identify the residential
properties within each subzone most suitable for sampling, primarily based on the amount of
accessible unpaved areas, and EPA proceeded to request voluntary access to the identified
properties.
Between August 1, 2022 and August 9, 2022, shallow soil samples (i.e., upper 4 inches) were
collected from 83 properties within the adjacent residential neighborhoods to the site. Sixty-three
of these properties were located within the Walnut Park neighborhood to the east of the site and
20 of these properties were located within the Florence-Firestone neighborhood to the northwest
of the site. Between 5 and 10 properties were sampled within each of the 12 sub-RZs. The event
included two different types of sampling methodology, four-point composite and ISM. The
four-point composite samples were collected by taking four discrete soil aliquots within a 2-foot
diameter circle, homogenizing on-site, and submitting the appropriate volume to the laboratory as
single sample. The ISM samples were collected by taking between 30 and 60 discrete increments,
homogenizing on-site, and submitting the entire volume to the laboratory for additional preparation
in accordance with ITRC guidance. Three four-point composite samples were collected on each
sampled residential property and one ISM sample was collected for each sub-RZ. A total of 249
four-point composite shallow soil samples and 12 ISM samples (not including duplicate, triplicate,
or QA samples) were submitted for fixed-laboratory metals analysis during the residential phase
of the Stage 3 event.
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Residential Shallow Sampling Results
Metals identified at concentrations at or above their corresponding HRS soil screening benchmark
in soil matrix release samples (i.e., four-point composite samples) collected during the Stage 3
event include antimony, arsenic, barium, cadmium, chromium, copper, lead, mercury,
molybdenum, and zinc. HRS soil screening benchmarks were assigned per the methodology
described in Section 3.2.1.3. ISM sample results are presented as the arithmetic mean of field QA
(i.e., triplicate) samples, where applicable. For contextual purposes, these results are also
compared to the May 2023 EPA Residential and Industrial RSLs; however, RSLs are not
appropriate for use as benchmarks under the HRS.
The assigned antimony HRS soil screening benchmark of 5.9 mg/kg was exceeded by 1 of the 249
four-point composite samples with a concentration of 25 mg/kg. One of the 83 sampled properties
exhibited at least one sample that exceeded the assigned antimony HRS soil screening benchmark.
ISM samples exhibited antimony concentrations that ranged from 0.56 mg/kg (qualified as
estimated) at RZ-2b to 1.6 mg/kg (qualified as estimated) at RZ-4a and RZ-4b. The Residential
and Industrial RSLs for antimony are 31 mg/kg and 470 mg/kg, respectively.
The assigned arsenic HRS soil screening benchmark of 22 mg/kg was exceeded by 5 of the 249
four-point composite samples with a maximum concentration of 64 mg/kg. Three of the 83
sampled properties exhibited at least one sample that exceeded the assigned arsenic HRS soil
screening benchmark. ISM samples exhibited arsenic concentrations that ranged from 3.3 mg/kg
(qualified as estimated) at RZ-3c to 6.6 mg/kg at RZ-la. The Residential and Industrial RSLs for
arsenic are 0.68 mg/kg and 3.0 mg/kg, respectively.
The assigned barium HRS soil screening benchmark of 459 mg/kg was exceeded by 3 of the 249
four-point composite samples with a maximum concentration of 1,300 mg/kg. Three of the 83
sampled properties exhibited at least one sample that exceeded the assigned barium HRS soil
screening benchmark. ISM samples exhibited barium concentrations that ranged from 130 mg/kg
at RZ-3a, RZ-3c, and RZ-4a to 280 mg/kg at RZ-4b. The Residential and Industrial RSLs for
barium are 15,000 mg/kg and 220,000 mg/kg, respectively.
The assigned cadmium HRS soil screening benchmark of 3.1 mg/kg was exceeded by 8 of the 249
four-point composite samples with a maximum concentration of 6.5 mg/kg. Eight of the 83
sampled properties exhibited at least one sample that exceeded the assigned cadmium HRS soil
screening benchmark. ISM samples exhibited cadmium concentrations that ranged from 0.87
mg/kg (qualified as estimated) atRZ-3ato 1.8 mg/kg (qualified as estimated) atRZ-lc andRZ-4c.
The Residential and Industrial RSLs for cadmium are 7.1 mg/kg and 100 mg/kg, respectively.
The assigned chromium HRS soil screening benchmark of 65 mg/kg was exceeded by 2 of the 249
four-point composite samples with a maximum concentration of 100 mg/kg. Two of the 83
sampled properties exhibited at least one sample that exceeded the assigned chromium HRS soil
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screening benchmark. ISM samples exhibited chromium concentrations that ranged from 16 mg/kg
at RZ-4a to 28 mg/kg at RZ-lb. Residential and Industrial RSLs for total chromium have not been
established.
The assigned copper HRS soil screening benchmark of 142 mg/kg was exceeded by 5 of the 249
four-point composite samples with a maximum concentration of 700 mg/kg. Five of the 83
sampled properties exhibited at least one sample that exceeded the assigned copper HRS soil
screening benchmark. ISM samples exhibited copper concentrations that ranged from 32 mg/kg at
RZ-3a to 61 mg/kg at RZ-4c. The Residential and Industrial RSLs for copper are 3,100 mg/kg and
47,000 mg/kg, respectively.
The assigned lead HRS soil screening benchmark of 401 mg/kg was exceeded by 12 of the 249
four-point composite samples with a maximum concentration of 960 mg/kg. Eight of the 83
sampled properties exhibited at least one sample that exceeded the assigned lead HRS soil
screening benchmark. ISM samples exhibited lead concentrations that ranged from 147 mg/kg at
RZ-3c to 243 mg/kg at RZ-2a. The Residential and Industrial RSLs for lead are 400 mg/kg and
800 mg/kg, respectively.
The assigned mercury HRS soil screening benchmark of 0.53 mg/kg was exceeded by 9 of the 249
four-point composite samples with a maximum concentration of 1.8 mg/kg. Nine of the 83 sampled
properties exhibited at least one sample that exceeded the assigned mercury HRS soil screening
benchmark. ISM samples exhibited mercury concentrations that ranged from 0.093 mg/kg at
RZ-4a to 0.52 mg/kg (qualified as estimated) at RZ-2a. The Residential and Industrial RSLs for
mercury are 11 mg/kg and 46 mg/kg, respectively.
The assigned molybdenum HRS soil screening benchmark of 3.3 mg/kg was exceeded by 2 of the
249 four-point composite samples with a maximum concentration of 4.3 mg/kg. Two of the 83
sampled properties exhibited at least one sample that exceeded the assigned molybdenum HRS
soil screening benchmark. ISM samples exhibited molybdenum concentrations that ranged from
0.54 mg/kg (qualified as estimated) at RZ-2b to 1.4 mg/kg (qualified as estimated) at RZ-4c. The
Residential and Industrial RSLs for molybdenum are 390 mg/kg and 5,800 mg/kg, respectively.
The assigned zinc HRS soil screening benchmark of 630 mg/kg was exceeded by 7 of the 249
four-point composite samples with a maximum concentration of 800 mg/kg. Seven of the 83
sampled properties exhibited at least one sample that exceeded the assigned zinc HRS soil
screening benchmark. ISM samples exhibited zinc concentrations that ranged from 226 mg/kg
(qualified as estimated) at RZ-3c to 380 mg/kg at RZ-4c. The Residential and Industrial RSLs for
zinc are 23,000 mg/kg and 350,000 mg/kg, respectively.
None of the four-point composite samples collected during the residential sampling event
exceeded the assigned HRS soil screening benchmarks for beryllium, cobalt, nickel, selenium,
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silver, thallium, or vanadium. The soil screening benchmarks and RSLs for these analytes are
provided in Table 9.
3.2.4.2 Stage 3 SI - Background Phase
(see Figure 14 through Figure 19 and Table 14)
Between October 4, 2022 and October 10, 2022, shallow soil samples were collected from five
publicly accessible areas using a similar methodology to the August 2022 residential phase. Each
of the five publicly accessible areas was designated as a background sampling zone (BZ) with each
BZ further divided into three background subzones (sub-BZs). Sampled BZs included: Roosevelt
Park (BZ-1), located approximately 0.75 mile northwest of the site; the in-development Walnut
Park Pocket Park (WPPP) (BZ-2), located approximately 0.5 mile northeast of the site; the Garden
View Road Verge (BZ-3), located approximately 1.0 mile east of the site; the S. Gate Road Verge
(BZ-4), located approximately 1.0 mile southeast of the site; and Washington Park (BZ-5), located
approximately 0.75 mile southwest of the site. Only one subzone was delineated within WPPP
(BZ-2) due to its relatively small size. Within each sub-BZ, five four-point composite samples
were collected, and one ISM sample was collected. In addition, a portion of Cudahy Street located
within the northern portion of the residential phase sampling area, was delineated as reference
zone/subzone and sampled during the event using the same methodology as the background
subzones. This reference zone was sampled to allow additional correlation and analysis between
background road verge zones and those within the site's potential area of influence. Seventy
four-point composite shallow soil samples and 14 ISM samples (not including duplicate, triplicate,
or QA samples) were submitted for fixed-laboratory metals analysis during the background phase
of the Stage 3 event.
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4. HAZARD RANKING SYSTEM FACTORS
The HRS is the principal mechanism that EPA uses to place uncontrolled waste sites on the NPL.
It is a numerically based scoring system that uses information from initial, limited investigations
to assess the relative potential of sites to pose a threat to human health or the environment. The
HRS uses a structured analysis approach to scoring sites. This approach assigns numerical values
to factors that relate to risk based on conditions at the site. The factors are grouped into three
categories:
¦ Likelihood that a site has released or has the potential to release hazardous substances
into the environment
¦ Characteristics of the waste (e.g., toxicity and waste quantity)
¦ People or sensitive environments (targets) affected by the release
Four pathways can be scored under the HRS:
¦ Groundwater migration (drinking water)
¦ Surface water migration (drinking water, human food chain, sensitive environments)
¦ Soil exposure and subsurface intrusion (population, sensitive environments)
¦ Air migration (population, sensitive environments)
4.1 Sources of Contamination
For HRS purposes, a source is defined as an area where a hazardous substance has been deposited,
stored, disposed, or placed, plus those soils that have become contaminated from migration of a
hazardous substance.
Potential hazardous substance sources associated with the Central Metal site include, but may not
be limited to, the following:
¦ On-site soils contaminated with metals, which are likely a result of historical on-site
operations. Arsenic, cadmium, cobalt, copper, lead, silver, and zinc were identified
during the 2019 SI investigations at concentrations significantly above background (see
Section 3.2.2 and Section 3.2.3).
¦ On-site soils contaminated with VOCs, which are likely a result of historical on-site
operations. Acetone was identified during the 2019 SI investigations at a concentration
significantly above background (see Section 3.2.3).
¦ Historical waste debris piles that were documented to be present on site from
approximately 2003 through 2018. Pile samples collected by state and local agencies
in 2011 and 2018 indicated concentrations of arsenic, cadmium, lead, and zinc at
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concentrations exceeding state hazardous waste benchmarks (Attachment 2;
Brash, 2019; DTSC, 2011).
4.2 Groundwater Pathway
In determining a score for the groundwater migration pathway, the HRS evaluates the following
factors: (1) the likelihood that sources at a site actually have released, or potentially could release,
hazardous substances to groundwater; (2) the characteristics of the hazardous substances that are
available for a release (i.e., toxicity, mobility, and quantity); and (3) the people (targets) who
actually have been, or potentially could be, impacted by the release. For the targets component of
the evaluation, the HRS focuses on the number of people who regularly obtain their drinking water
from wells that are located within 4 miles of the site. The HRS emphasizes drinking water usage
over other uses of groundwater (e.g., food crop irrigation and livestock watering) because, as a
screening tool, it is designed to give the greatest weight to the most direct and extensively studied
exposure routes.
4.2.1 Hydrogeological Setting
(see Table 15)
The Central Metal site lies within the Central Subbasin in the Coastal Plain of the Los Angeles
Groundwater Basin. The Central Subbasin is generally bound to the north by the folded, uplifted
and eroded Tertiary basement rocks of the La Brea High surface divide; to the northeast and east
by the less permeable Tertiary rocks of the Elysian, Repetto, Merced, and Puente Hills; to the
southeast by the Coyote Creek flood control channel (approximate Los Angeles County/Orange
County boundary); and to the southwest by the Newport Inglewood Uplift, a regional anticline
associated with the Newport Inglewood fault system. Geologic units typically found beneath the
subbasin include Holocene-age alluvium, the upper Pleistocene Lakewood Formation, and the
lower Pleistocene San Pedro Formation. The Los Angeles and San Gabriel rivers pass across the
surface of the subbasin, primarily by way of engineered concrete channels, on their way to the
Pacific Ocean. The average net annual precipitation in the subbasin is approximately 12 inches
(DWR, 1961; DWR, 2004).
The Central Subbasin has historically been divided into the Los Angeles Forebay at the northwest,
the Montebello Forebay at the north, the Whittier Area at the northeast, and the Central Basin
Pressure Area at the center and southwest. However, these areal distinctions are appropriate for
geographical purposes only and do not accurately represent hydrogeologic conditions within the
areas. In actuality, the hydrogeologic forebays, which are generally characterized by unconfined
and relatively interconnected aquifer systems, are limited to only small regions within the greater
Forebay areas. The Montebello Forebay, as well as the Los Angeles Forebay to a lesser degree,
serve as the primary groundwater recharge areas for both shallow and deep aquifers across the
entirety of the subbasin. The Central Basin Pressure Area is generally characterized by confined
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aquifer systems separated by relatively impermeable clay layers, although semipermeable zones
within these layers allow aquifers to be interconnected in some areas. These semipermeable zones
gradually decrease in frequency and magnitude with increasing distance from the forebays
(DWR, 1961; DWR, 2004).
The site is located within the southern portion of the Los Angeles Forebay geographical area;
however, underlying hydrogeologic conditions are more accurately represented by those typically
identified with the Central Basin Pressure area. Groundwater beneath the site is typically found
within the coarser-grained sediments of the Holocene alluvium (Gaspur aquifer), the upper
Pleistocene Lakewood Formation (Exposition and Gage aquifers), and the lower Pleistocene San
Pedro Formation (Hollydale, Lynwood, Silverado, and Sunnyside aquifers). Throughout much of
the subbasin, the Jefferson aquifer is described as present between the Hollydale and Lynwood
aquifers; however, this aquifer is reportedly absent in the vicinity of the site. The elevations and
depths of the aquifers underlying the site, as estimated from published source material, are
presented in Table 15. Irregular patches of a perched or semi-perched aquifer are also present
within the Holocene alluvium throughout much of the subbasin. Although significant amounts of
water can be found within these perched water-bearing zones, they are often discontinuous over
relatively short distances and have historically only had minimal economic benefit. Thus, these
perched aquifers do not meet the criteria of an "aquifer" for HRS purposes (DWR, 1961;
DWR, 2004).
For the purposes of this SI, the Gaspur aquifer beneath the site is defined as being between 90 and
145 ft-bgs; however, the base of this aquifer is considered approximate because no information
was found regarding site-specific lithology below approximately 111 ft-bgs. Water-bearing units
identified at shallower depths are defined as being associated with one or more perched (or
semiperched) aquifers. These designations were assigned primarily based on CPT lithological
profile reports that were developed during the completion of the Stage 2 SI investigation. The CPT
Lithological Profile Reports developed during the SI investigation are presented in Attachment 6
(DWR, 1961).
Throughout much of the subbasin, the Pleistocene-age aquifers are under confined conditions due
to the presence of fine-grained, low-permeability interbedded sediments. Although these fine
grained sediments, or aquicludes, generally restrict the downward migration of groundwater from
overlying aquifers, semipermeable zones within the aquicludes allow aquifers to be interconnected
in some areas. In addition, hydrogeologic modeling of multi-aquifer systems similar to that found
in the Central Basin Pressure Area, has shown that groundwater wells screened across multiple
aquifers (or wells with improperly constructed annular seals that cross multiple aquifers) can act
as a direct pathway for the migration of significant volumes of shallow groundwater into deep
confined aquifers when vertical hydraulic head variations create a downward hydraulic gradient.
The process of this downward migration is increased in areas where the deeper aquifers have
periods of high-volume pumping such as seasonal demand. Furthermore, additional studies have
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shown that liquids that are denser than water (i.e., dense non-aqueous phase liquids such as PCE
and TCE) can migrate downward through a multi-aquifer well even when vertical hydraulic head
variations create an upward hydraulic gradient. As of the end of the 2012-2013 fiscal year, there
were 537 known extraction wells (306 active and 231 inactive) within the subbasin
(AwwaRF, 2006; DWR, 1961; DWR, 2013; Johnson et al., 2011).
The State of California, Department of Water Resources' Bulletin No. 104 (Planned Utilization of
the Ground Water Basins of the Coastal Plain of Los Angeles County) - Appendix A presents
"idealized" geologic cross-sections transecting the Central Subbasin. These cross-sections indicate
apparent areas of merged aquifers throughout much of the subbasin. However, with the exception
of the Gaspur and Exposition aquifers, which are presented as merged throughout much of the
local area, no zones of merged aquifers were indicated in the vicinity of the site. Aquifer
interconnection within 2 miles of the site has been documented between the Gaspur and Exposition
aquifers. Aquifer interconnections within 2 miles of the site have not been established between the
Exposition and Gage, the Gage and Hollydale, the Hollydale and Lynwood, the Lynwood and
Silverado, and the Silverado and Sunnyside (DWR, 1961).
The regional groundwater flow direction within the subbasin, which was calculated using data
from wells screened within the Upper San Pedro Formation (Lynwood through Sunnyside
aquifers), is generally to the southwest. Based upon data collected between 2007 and 2022, flow
within these deeper aquifers in the vicinity of the site trended towards the southwest with temporal
variations from west-southwest to south-southwest (WRD, 2023).
A perched (or semiperched) aquifer was not encountered during the 2019 Stage 2 SI investigation.
However, because of the highly irregular and discontinuous nature of these perched water-bearing
zones, there remains a potential that perched groundwater may exist beneath one or more portions
of the site. In addition, based on the CPT lithological profiles, which are provided in
Attachment 6, coarser units that have the potential to be water-bearing do exist between the
ground surface and the depth of first groundwater, suggesting that perched water may be seasonally
present beneath the site.
During the 2019 SI investigation, groundwater beneath the site was first encountered at depths that
ranged from approximately 98 ft-bgs to 101 ft-bgs, consistent with the expected depths of the
Gaspur aquifer. No groundwater monitoring wells are located on site. Groundwater data collected
from between 1998 and 2010 on the property located immediately south of the site have reported
a relatively low horizontal hydraulic gradient and a variable shallow groundwater flow direction;
predominately from south-southeast to southwest. As such, the groundwater flow direction in the
Gaspur aquifer beneath the site, as well as in the aquifers between the Gaspur and Lynwood, is
considered to be unknown (AMEC, 2014).
During the SI investigation, the subsurface geology at the site was logged to a depth of 21 ft-bgs,
the base of continuous coring. Subsurface materials primarily consisted of medium brown to light
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grey, fine- to coarse-grained silty-sands with interbedded lenses (typically less than 24 inches and
most frequently observed between approximately 10 ft-bgs and 15 ft-bgs) of sands and sandy silts,
which generally increased in grain size with depth. A dark brown-green clay was frequently
encountered between approximately 18 ft-bgs and 20 ft-bgs. The lithological identifications are
described in the sample logbook (Attachment 9).
Additionally, during the SI investigation, CPT technology was used to estimate the subsurface
lithology to a total depth of approximately 111 ft-bgs. The interpreted Soil Behavior Type
generated from the CPT generally indicated sand units from approximately 8 ft-bgs to 13 ft-bgs,
38 ft-bgs to 40 ft-bgs, 62 ft-bgs to 67 ft-bgs, 85 ft-bgs to 87 ft-bgs, and 90 ft-bgs to 111 ft-bgs
(total depth). Between these sand units, the soils were generally indicated as sandy-silts and
silty-sands with thin (less than 4 ft) interbedded lens of finer grained materials (e.g., clays). The
CPT Lithological Profile Reports are presented in Attachment 6.
4.2.2 Groundwater Targets
(see Table 16)
The nearest HRS-eligible drinking water well to the site is the Nadeau Well 03; which is owned
and operated by the Golden State Water Company (GSWC) and is located approximately 0.42 mile
northwest of the site. This well has exhibited PCE and TCE concentrations up to 1.4 |ig/L
(August 2002) and 7.6 |ig/L (September 2020), respectively. The federal MCL for both PCE and
TCE is 5.0 |ig/L (RWQCB, 2023a; WESTON, 2023).
There are 70 known active drinking water wells and four known maintained-standby wells located
within the target distance limit (TDL) (i.e., 4 miles of established on-site sources). Water purveyors
known to operate wells within the TDL include GSWC - Florence/Graham, City of South Gate,
City of Huntington Park, Walnut Park Mutual Water Company (MWC), GSWC - Bell, Bell
Gardens, Los Angeles Department of Water and Power (DWP), City of Lynwood, Tract 349
MWC, Park Water Company (Liberty) - Lynwood, Park Water Company (Liberty) - Compton,
City of Compton, GSWC - Willowbrook, Lynwood Park MWC, Maywood MWC No. 1,
Maywood MWC No. 2, Maywood MWC No. 3, GSWC - Southwest, Tract 180 MWC, City of
Vernon, and Sativa-LA County Water District (CWD). Additional service information for these
purveyors is presented in Table 16 (WESTON, 2023).
4.2.3 Groundwater Pathway Conclusion
A release of hazardous substances from the site to groundwater within the Gaspur aquifer, or
additional aquifers underlying the Gaspur aquifer, has not been established based on the results of
the SI investigation. For HRS purposes, a release to groundwater is established when a hazardous
substance is detected in a hydraulically downgradient well at a concentration significantly above
background levels, and some portion of the release is attributable to the site. A hazardous substance
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is considered to be present at a concentration significantly above background levels when one of
the following two criteria is met: (1) the hazardous substance is detected in the contaminated
sample but not detected in the background samples, or (2) the hazardous substance is detected in
the contaminated sample at a concentration equal to or greater than three times the maximum
background level when the substance was detected in the background samples.
Results from the 2019 Stage 1 and Stage 2 SI investigations identified detectable concentrations
of metals and VOCs within the Gaspur aquifer groundwater beneath the site (see Section 3.2.3).
However, because the hydraulic gradient of this aquifer beneath the site has not been adequately
defined, background concentrations could not be established and a release attributable to the site
could not be established (see Section 3.2.1).
The geologic materials between the ground surface at the site and the top of the deepest identified
aquifer, the Sunnyside, are generally characterized by confined aquifer systems, which are
composed of relatively permeable sands through gravels and are separated by relatively
impermeable clay through silt layers; although semipermeable zones within these layers allow one
or more aquifers to be interconnected in some areas. Aquifer interconnection within 2 miles of the
site has been documented between the Gaspur and Exposition aquifers. Aquifer interconnections
within 2 miles of the site have not been established between the Exposition and Gage, the Gage
and Hollydale, the Hollydale and Lynwood, the Lynwood and Silverado, and the Silverado and
Sunnyside. There are 70 known active drinking water wells and four known standby drinking water
wells within 4 miles of the site. These wells, which are operated by 20 distinct water purveyors,
serve an apportioned population of approximately 390,000 (DWR, 1961; WESTON, 2017;
WESTON, 2023).
4.3 Soil Exposure and Subsurface Intrusion Pathway
4.3.1 Soil Exposure
In determining the score for soil exposure, the HRS evaluates the following: (1) the likelihood that
there is surficial contamination associated with the site (e.g., contaminated soil that is not covered
by pavement or at least 2 feet of clean soil); (2) the characteristics of the hazardous substances in
the surficial contamination (i.e., toxicity and quantity); and (3) the people or sensitive
environments (targets) that actually have been, or potentially could be, exposed to the
contamination. For the targets component of the evaluation, the HRS focuses on populations that
are regularly and currently present on or within 200 feet of surficial contamination. The four
populations that receive the most weight are residents, students, daycare attendees, and terrestrial
sensitive environments.
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4.3.1.1 Physical Conditions
The Central Metal site has been used for industrial operations since at least the late 1920s and is
surrounded by industrial, commercial, and residential areas. During scrap metal operations, which
occurred from approximately the late 1980s through 2016, various scrap metal and debris were
stored across the exterior portions of the site in large, uncontained, and uncovered piles. A debris
pile located on the north-central portion of the site in 2005 is estimated to have covered more than
23,000 ft2 and been several stories in height. In 2018, under the direction of the local CUP A, an
on-site debris pile was containerized, sampled, and subsequently classified as a hazardous waste
based on identified concentrations of arsenic, lead, and cadmium. Moreover, a 2011 DTSC
investigation also identified high levels of hazardous heavy metals in debris piles on the site. The
site is entirely fenced and generally inaccessible to the public. The surface of the site is entirely
covered in concrete or buildings (Attachment 2; Brash, 2019; DTSC, 2011; Google, 2023;
WEECO, 2014; WESTON, 2017).
4.3.1.2 Soil Exposure Targets
The site is situated between two residential communities, the southwestern portion of Walnut Park
to the east and the east-central portion of Florence-Firestone (also known as Florence-Graham) to
the west. These communities are both composed of primarily single-family residential buildings
situated on parcels that are typically less than 0.25 acre in size. Several multi-family and/or
apartment complexes are also intermixed within the neighborhoods. The population within 1 mile
of the site is estimated to be approximately 58,000. The number of workers that regularly occupy
the site is unknown. There are no residents or sensitive environments on site (Appendix C;
Google, 2023; EPA, 2023c).
Based on historical data within the basin, the local wind patterns at the site are estimated to
resemble those at the Hawthorne Municipal Airport wind station, which is located approximately
6.5 miles west-southwest of the site. Based on mean wind speed data, the predominant wind flow
direction is from the west-southwest and the secondary wind flow direction is from the
east-southeast (WRCC, 2020).
4.3.1.3 Soil Exposure Conclusion
During the 2022 Stage 3 SI investigation, which included collecting shallow soil samples from 63
properties in the Walnut Park neighborhood and from 20 properties in the Florence-Firestone
neighborhood, significantly elevated concentrations of metals, including lead and arsenic, were
identified on a minority of the sampled properties (see Section 3.2.4). However, the relatively low
frequency of HRS screening benchmark exceedances, as well as the lack of any apparent pattern
in the spatial distribution of these exceedances, suggests that the identified metals contamination
on the sampled residential properties is unlikely to be attributable to historical operations at the
Central Metal site. As such, a release of hazardous substances from the site to off-site residential
soils has not been established based on the results of the SI investigation.
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4.3.2 Subsurface Intrusion
In determining the score for subsurface intrusion, the HRS evaluates the following: (1) the
likelihood that sources at a site actually have released, or potentially could release, hazardous
substances to regularly occupied structures; (2) the characteristics of the hazardous substances that
are available for a release (i.e., toxicity, degradation, and quantity); and (3) the people (targets)
who actually have been, or potentially could be, exposed to the contamination. For the targets
component of the evaluation, the HRS focuses on populations living, attending school or daycare,
or working in a regularly occupied structure with observed exposure or within an area of
subsurface contamination.
During the 2019 Stage 1 and Stage 2 SI investigations, detectable concentrations of metals and
VOCs were identified in the subsurface at the Central Metal site. Metals are not considered to
represent a subsurface intrusion hazard. During this investigation, PCE was identified in a 2 ft-bgs
soil matrix sample collected from the central portion of the Warehouse at a concentration of
2.2 |ig/kg. The soil vapor survey completed as part of the SI identified three analytes that exceeded
their respective Resident VISLs, with PCE being the most significant (see Section 3.2.2). The
maximum PCE concentrations of 2,530 |ig/m3 and 2,190 |ig/m3 were identified in the 6.5 ft-bgs
and 16 ft-bgs samples, respectively, which were collected from boring SV-14 at the central portion
of the Warehouse. PCE was not identified above its Resident VISL in any additional soil vapor
samples and was not identified at detectable concentrations in any additional soil matrix samples.
Furthermore, during the 2021 subsurface investigation completed by CMI, PCE was identified at
a maximum concentration of 1,340 |ig/m3 in on-site soil vapor and was not reported at detectable
concentration in soil matrix samples (see Section 3.1.1.6). The Resident and Commercial VISLs
for PCE are 360 |ig/m3 and 1,570 |ig/m3, respectively, and the residential RSL is 24,000 |ig/kg.
The Central Metal facility was 'shuttered' in 2016 and had regularly occupied workspaces until at
least 2019, primarily at the Main Office; however, the current status of these workspaces is not
known. Based on the relatively limited scale, both in overall concentration and spatial distribution,
of the subsurface PCE contamination identified in the 2019 EPA investigations and the 2021 CMI
investigation, this contamination is not considered to represent a significant subsurface intrusion
hazard to occupied off-site structures (Appendix C; Brash, 2019; WEI, 2021b).
4.4 Surface Water Pathway
To determine the score for the surface water pathway, the HRS evaluates the following: (1) the
likelihood that sources at a site actually have released, or potentially could release, hazardous
substances to surface water (e.g., streams, rivers, lakes, and oceans); (2) the characteristics of the
hazardous substances that are available for a release (i.e., toxicity, persistence, bioaccumulation
potential, and quantity); and (3) the people or sensitive environments (targets) that actually have
been, or potentially could be, impacted by the release. For the targets component of the evaluation,
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the HRS focuses on drinking water intakes, fisheries, and sensitive environments associated with
surface water bodies within 15 miles downstream of the site.
Surface water run-off from the Central Metal site is expected to flow from the paved surfaces at
the site into curbside municipal stormwater drains located along adjacent public roadways and
easements. The nearest surface water body to the site is Compton Creek, which is approximately
2.9 miles southwest. Compton Creek was channelized in concrete by the U.S. Army Corps of
Engineers in approximately 1939 as part of a larger flood-control effort for the region. The
Compton Creek watershed drains an area of approximately 42 square miles. The creek is channeled
from south Los Angeles (near S. Main Street and W. 107th Street) for approximately 8.5 miles to
the confluence of the creek with the Los Angeles River, approximately 5.5 miles north of where
the river empties into the Pacific Ocean at San Pedro Bay. Flows in the both the creek and river
are dominated by urban run-off There are no surface water intakes, fisheries, or sensitive
environments associated with Compton Creek or the Los Angeles River downstream of the site;
however, there is a potential for fisheries and/or recreational areas to exist within San Pedro Bay
(Appendix C; Google, 2023; UC, 2017).
4.5 Air Pathway
In determining the score for the air migration pathway, the HRS evaluates the following: (1) the
likelihood that sources at a site actually have released, or potentially could release, hazardous
substances to ambient outdoor air; (2) the characteristics of the hazardous substances that are
available for a release (i.e., toxicity, mobility, and quantity); and (3) the people or sensitive
environments (targets) who actually have been, or potentially could be, impacted by the release.
For the targets component of the evaluation, the HRS focuses on regularly occupied residences,
schools, and workplaces within 4 miles of the site. Transient populations, such as customers and
travelers passing through the area, are not counted.
No hazardous substances sources applicable to the air migration pathway were identified. As of
October 2022, the site was entirely fenced and generally inaccessible to the public. The entirety of
the surface of the site was covered in concrete or buildings. Furthermore, all known potential
hazardous substances sources relevant to the air pathway that were historically present at the site
(i.e., debris piles) have been removed (Appendix C).
4.6 Hazard Ranking System Summary
The primary objective of the Central Metal SI investigation was to document information to be
used in the HRS characterization process, including source areas and levels of contamination in
on-site soil, soil vapor, and groundwater, as well as on residential properties downwind of the site.
Based on the results of this investigation, a release of hazardous substances from the site to the
Gaspur aquifer, or to any aquifer underlying the Gaspur aquifer, has not been established.
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Additionally, a release of hazardous substances from the site to the surface soils of adjacent
residential neighborhoods via airborne processes has not been established.
The following HRS factors are considered to be most significant in regards to NPL consideration
for the groundwater pathway:
¦ Hazardous substance sources at the site have been documented, consisting of
subsurface soils contaminated during historical operations. Substances including
acetone, arsenic, cadmium, cobalt, copper, lead, silver, and zinc were present in site
soils at concentrations exceeding source action levels (i.e., significantly above
background).
¦ The hydraulic gradient of the shallow aquifer beneath the site has not been adequately
defined primarily due to the lack of an on-site, or sufficiently near-site, active
groundwater monitoring well network. As such, background concentrations cannot be
assigned, and hazardous substances identified in the groundwater beneath the site
cannot be documented as attributable to historical on-site operations.
¦ The geologic materials between the site surface and the top of the Silverado aquifer are
generally characterized by relatively permeable sands and gravels (aquifers) with
interbedded confining zones (aquitards) of less permeable clays and silts.
¦ The nearest drinking water well is located less than 1/2 mile from the site.
¦ Drinking water wells within 4 miles of the site serve an apportioned population of
approximately 390,000.
The following HRS factors are considered to be most significant in regards to NPL consideration
for the soil exposure pathway:
¦ Hazardous substance sources have been documented as historically existing on the site
including numerous debris piles that were present on site from approximately 2003
through 2018. Pile samples collected by state and local agencies in 2011 and 2018
indicated concentrations of arsenic, cadmium, lead, and zinc at concentrations
exceeding state hazardous waste benchmarks.
¦ Based on the lack of discernable or significant patterns within the shallow soil
residential data, specifically in terms of the frequency and spatial distribution of metals
contamination, insufficient evidence was found to indicate soil contamination was
attributable to historical on-site operations.
¦ The population within 1 mile of the site is estimated to be 58,000.
The following HRS factors are considered to have low significance in regards to NPL
consideration:
¦ No drinking water intakes are associated with surface water within 15 miles
downstream of the site. There is the potential, however, for fisheries and/or sensitive
environments associated with the Pacific Ocean to exist within this target distance limit.
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¦ There are no known schools, daycare centers, or sensitive environments on site.
¦ The site is fenced and generally inaccessible to the public.
¦ The surface of the site is covered with pavement or buildings.
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CAN000903324
REFERENCES
5. REFERENCES
AMEC, 2014:
AwwaRF, 2006:
AMEC Environment and Infrastructure, Inc., Removal Action Summary
Report, Jack Engle & Company, 04 June 2014.
American Water Works Associated Research Foundation, Contaminant
Transport Through Aquitards: Technical Guidance for Aquitard
Assessment, 2006.
Brash, 2019:
DTSC, 2011:
DTSC, 2012:
Brash Industries; Stockpile Removal, Sampling Data and Analysis for
Central Metal, lnc\ 25 March 2019.
Department of Toxic Substances Control; Report on Investigation on
Central Metal, Inc.; 08 May 2011.
Department of Toxic Substances Control; letter addressed to Mr. Steve
Oh, Agent for Service, In the Matter of: Central Metal Inc. - Docket No.
2011-3488; 08 October 2012.
DTSC, 2016:
DTSC, 2023a:
Department of Toxic Substances Control; California Site Screening,
Damille Metals Svc; 15 August 2016.
Department of Toxic Substances Control; Hazardous Waste Tracking
System (HWTS), Search Results, Damille Metal SVC (CAL000061913),
Central Metal Inc. (CAL000286492) ;
http://www.envirostor.dtsc.ca.gov/public/search.asp: data extracted 20
June 2023.
DTSC, 2023b:
DTSC, 2023c:
DWR, 1961:
Department of Toxic Substances Control; California Land Reuse and
Revitalization Act Agreement (CLRRA), Docket No. HAS-FY22/23-116;
31 May 2023.
Department of Toxic Substances Control; Envirostor Database, Search
Results, Damille Metal SVC (60002329);
http://www.envirostor.dtsc.ca.gov/public/search.asp: data extracted 08
September 2023.
Department of Water Resources, State of California; Bulletin No. 104,
Planned Utilization of the Ground Water Basins of the Coastal Plain of
Los Angeles County, Appendix A, Ground Water Geology; June 1961.
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CAN000903324
REFERENCES
DWR, 2004:
EPA, 2023a:
EPA, 2023b:
EPA, 2023c:
Google, 2023:
Department of Water Resources, State of California; California's
Groundwater Bulletin 118, Coastal Plain of Los Angeles Groundwater
Basin, Central Subbasin; 27 February 2004.
U.S. Environmental Protection Agency, Superfund Program; Superfund
Public User Database; LIST-008R Active Site Status Report, Region 9,
Pre-Remedial Action Types', https://www.epa. gov/superfund/superfund-
data-and-reports; 24 July 2023; p. 319.
U.S. Environmental Protection Agency; Envirofacts Warehouse,
RCRAInfo query results; 8201 Santa Fe;
https://www3.epa.gov/enviro/facts/rcrainfo/search.html: data extracted 08
September 2023.
U.S. Environmental Protection Agency; EJ Screen: Environmental Justice
Screening and Mapping Tool; Version 2.11 query results; 1 mile Ring
Centered at 33.962586,-118.230595, https://www.epa.gov/eiscreen; data
extracted 18 April 2023.
Google Earth; 33°57'47.31 "N 118°13 '52.07"W, 20 June 2023, 08May
2022, 11 February 2022, 24 September 2021, 31 December 2020, 04 July
2020, 08 June 2018, 14March 2018, 03 December 2017, 27March 2017,
18 October 2016, 02 February 2016, 23 March 2015, 23 April 2014, 16
April 2013, 27 August 2012, 07March 2011, 14 November 2009, 08
January 2008, 30 July 2007, 15March 2006, 08 January 2006, 19
January 2005, 21 February 2004, 30 November 2003, 08 March 2003, 30
May 1994; http://earth.google.com; data extracted 08 September 2023.
Johnson et al., 2011: Johnson, R.L., Clark, B.R., Landon, M.K., Kauffman, L.J., Eberts, S.M.,
Journal of the American Water Resources Association, Modeling the
Potential Impact of Seasonal and Inactive Multi-Aquifer Wells on
Contaminant Movement to Public Water-Supply Wells, June 2011.
JTT, 2012:
LAC A, 2023:
J. T. Thorpe Settlement Trust; J.T. Thorpe Land Based Site List, Ace
Foundry, 10 April 2012; p. 1.
County of Los Angeles, Department of the Assessor; Property
Information, Assessor's ID Nos. 6202-036-009, 6202-036-010, 6202-036-
011, 6202-036-012, 6202-036-013, 6202-037-004, 6202-037-006, 6202-
037-009, 6202-037-010, https://maps.assessor.lacountv.gov ; data
extracted 08 September 2023.
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REFERENCES
LACFD, 1995:
LACFD, 1999:
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Notice of Violation and Order to Comply, Damille Metal
Supply, Inc., 26 January 1995.
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Inspection Summary Report, Damille Metal Supply, Inc., 05
November 1999.
LACFD, 2002:
LACFD, 2005:
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Facility Information Report, Damille Metal Supply, Inc.', 25
February 2002.
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Facility Information Report, Damille Metal Supply, Inc.', 03
March 2005.
LACFD, 2009:
LACFD, 2014:
LADPW, 2004:
LADPW, 2005:
LADPW, 2008a:
LADPW, 2008b:
LADPW, 2016:
LAPL, 2023:
RWQCB, 2023a:
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Inspection Report, Central Metal, Inc.', 07 August 2009.
County of Los Angeles, Fire Department, Health Hazardous Materials
Division; Inspection Report, Central Metal, Inc., 26 August 2014.
County of Los Angeles, Department of Public Works; Inspector's Report,
Central Metals, Inc. , 26 August 2004.
County of Los Angeles, Department of Public Works; Notice of Non-
Compliance, Central Metals, 22 March 2005.
County of Los Angeles, Department of Public Works; Notice, Central
Metals, Inc., 16 September 2008.
County of Los Angeles, Department of Public Works; Notice of Violation
and Order to Comply, Central Metals, Inc., 05 December 2008.
County of Los Angeles, Department of Public Works; Stormwater
Certification of Inspection Central Metals, Inc. , 21 April 2016.
Los Angeles Public Library; Los Angeles Public Library Photo Collection,
Search Results, Marbrisa; https://calisphere.org/collections/26094: data
extracted 08 September 2023.
Regional Water Quality Control Board; Geotracker Database - Regulator
Access, DPH Public Supply Well Search Results; Golden State Water
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REFERENCES
RWQCB, 2023b:
Spitzzeri, 2019:
UC, 2017:
UCSB, 2023:
Company - Florence/Graham, Miramonte Well 01, Miramonte Well 02,
Miramonte Well 03, Nadeau Well 03; data extracted 08 September 2023.
Regional Water Quality Control Board; Geotracker Database, Search
Results, 8201 Santa Fe, Huntington Park;
http://geotracker.waterboards.ca.gov/search.asp: data extracted 08
September 2023.
Spitzzeri, Paul R.; The Homestead Blog; From Point A to Point B: The
Southern Pacific Railroad Links to Los Angeles; 05 September 2019.
University of California, Division of Agriculture and Natural Resources;
About the Compton Creek Watershed; http://ucanr.edu: data extracted 28
February 2017.
University of California at Santa Barbara; UCSB Library Frame Finder,
Flight C-300, 1927; Flight C-278, 1928; Flight C-2060, 1932; Flight
Watson-412A, 1934; Flight AXJ-27-54, 1938; Flight C-l1351, 1947;
Flight C-22555, 1956; Flight C-25019, 1965; Flight TG-7600, 1976;
Flight AMI-LA-83, 1983; Flight NAPP-1840, 1989; data extracted 13 June
2023.
WCAB, 1984:
WEECO, 2014:
California Department of Industrial Relations, Workers' Compensation
Appeals Board; Case No. 79LA447909, Notice and Request for Allowance
of Lien; 02 May 1984.
Western Environmental Engineers Co.; Phase I Environmental Site
Assessment, 8201 Santa Fe Avenue, Huntington Park, CA; 06 January
2014.
WEI, 2021a:
Waterstone Environmental, Inc.; Phase 1 Environmental Assessment
Report; 8201 Santa Fe Avenue, Huntington Park, CA 90255; 31 August
2021.
WEI, 2021b:
WESTON, 2017:
WESTON 2020:
Waterstone Environmental, Inc.; Report addressed to Mr. Jong Uk Byun,
Re: Results of Additional Phase II Investigation at 8201 Santa Fe Avenue,
Huntington Park, CA 90255; 23 November 2021.
Weston Solutions, Inc.; Preliminary Assessment Report, Damille Metal
Svc (EPA ID No.: CAN000903324); December 2017.
Weston Solutions, Inc.; Site Inspection, Interim Sampling Report, Central
Metal (EPA ID No.: CAN000903324); May 2020.
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Central Metal SI Report September 2023
CAN000903324 REFERENCES
WESTON, 2023: Weston Solutions, Inc.; Drinking Water Wells - GIS Report, Central
Metal, Inc.; June 2023.
Note: This document is confidential and is included in the confidential information packet.
WRCC, 2020: Western Regional Climate Center; WRCC Station Maps, Hawthorne Muni
AP California; data extracted 04 March 2020.
WRD, 2023: Water Replenishment District of Southern California; Engineering Survey
and Report) 17 August 2023.
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TABLES
TABLES
T-i
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Central Metal SI Report
September 2023
CAN000903324 TABLES
Table 1: Site Chronology
Approximate
Date Range
Souree Area
Operator
Primary
Operations
1870s- 1970s
FRA
Southern Pacific Railroad
Railroad depot and freight operations
1920s - 1980s
FTMA
National Tank &
Manufacturing Co.
Corrugated metal lank manufacturing
1930s - 1970s
FTMA
Ace Foundry LTD
Metal casting
1970s-2002
FRA
Southern Pacific Railroad
No significant operations
1989-2002
FTMA
Damille Metal Supply,
Inc.
Industrial scrap metal recycling
1990s
FTMA
L&S Metals
U nknown
1990s
FTMA
MCS, Inc.
Unknown
1990s
FTMA
All Star Metals. Inc.
U nknown
2002-2016
FRA & FTMA
Central Metal, Inc.
Industrial scrap metal recycling
2016-2018
FRA & FTMA
Central Metal. Inc.
(defunct)
No significant operations
2018-2020
FRA & FTMA
Central Metal, Inc.
(defunct)
Facility cleanup and asset liquidation
2020-2022
FRA & FTMA
U nknown
Cargo Shipping Container Storage
2022 - Present
FRA & FTMA
U-Haul®
Bulk Storage
Definitions:
FRA = Former Railroad Area
FTMA = Former Tank Manufacturing Area
References:
Brash, 2019; DTSC, 2016; DTSC, 2023b; Google, 2023; JTT. 2012; LACFD, 1999; LACFD, 2002; WCAB, 1984; WEECO, 2014
T-1 (1 of 1)
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Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 2: 2021 CMI Phase II Sampling Results Summary
Sample
Location
Depth
(ft)
Soil Matrix (mg/kg)
Soil Vapor (|jg/m3)
Arsenic
Cd
Cobalt
Lead
Zinc
PCE
Residential RSL
0.68
7.1
23
400
23,000
Resident VISL
360
Commercial RSL
3
100
350
800
350,000
Commercial VISL
1,570
P-1
0.5
28
29
47
3,600
20,000
-
SV-21
2
12
<0.52
17
130
320
—
5
6.5
1.4
7.0
180
240
1,340
15
—
—
—
—
—
1,290
SV-22
2
45
<0.48
11
140
230
—
5
4.4
0.62
9.3
8.5
66
115
15
—
—
—
—
—
14
SV-23
2
2.9
<0.52
9.2
10
70
—
5
—
—
—
—
—
573
15
—
—
—
—
—
48
SV-24
2
1.2
<0.51
5.9
2.4
34
—
5
—
—
—
—
—
369
15
—
—
—
—
—
42
SV-25
2
34
<0.49
9.9
120
170
—
5
—
—
—
—
—
456
15
—
—
—
—
—
90
SV-26
2
13
<0.50
11
15
71
—
5
—
—
—
—
—
643
15
—
—
—
—
—
162
SV-27
2
31
1.2
12
190
290
—
5
3.0
0.48
7.4
4.1
51
10
15
—
—
—
—
—
18
SV-28
2
78
<0.47
8.0
51
100
—
5
—
—
—
—
—
60
15
-
-
-
-
-
52
SV-29
2
3.0
<0.46
7.2
4.7
45
-
5
-
-
-
-
-
143
15
-
-
-
-
-
114
SV-30
2
23
<0.53
9.8
120
640
-
5
-
-
-
-
-
189
15
-
-
-
-
-
171
SV-31
2
7.8
1.0
14
100
310
-
5
-
-
-
-
-
199
15
-
-
-
-
-
54
SV-32
2
5.8
<0.46
12
35
120
-
5
-
-
-
-
-
965
15
-
-
-
-
-
181
SV-33
2
2.7
0.94
13
6.8
400
-
5
-
-
-
-
-
16
15
-
-
-
-
-
41
SV-34
2
5.3
<0.49
8.4
13
58
-
5
-
-
-
-
-
125
15
-
—
—
—
-
74
Definitions:
Cd = Cadmium
ft = feet
mg/kg = milligram per kilogram
PCE = Tetrachloroethylene
RSL = EPA Regional Screening Level (May 2023; THQ =1.0, Risk = 10-6)
VISL = EPA Vapor Intrusion Screening Level (Nov 2019; Target Sub-Slab; THQ =1.0, Risk = 10-6)
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
References:
WEI, 2021b
T-2 (1 of 1)
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Central Metal SI Report
September 2023
CAN000903324 TABLES
Table 3: 2011 DTSC Debris Pile Sampling Results Summary
Sample
Number
Sample Deseription
Contaminant(s)
Result *
Regulatory
Limit
CM-01
Sample of sludge on the concrete
just inside the facility
Lead (STLC)
Diesel and oily wastes,
PCBs present
26 mg/L
5.0 mg/L
CM-02 *
Liquid Sample taken from puddle
of liquid outside of the facility
No hazardous waste levels of
contaminants found.
Oily wastes present
CM-03
Sample from the sludge settled on
the side of the drainage canal.
Lead (STLC)
Oily wastes, ORO,
presence of PCBs
17 mg/L
5.0 mg/L
CM-04
Sediment sample from the bottom
of the drain channel
Lead (STLC)
Diesel and oily wastes.
PCBs present
15 mg/L
8,100 mg/kg
20,000 mg/kg
5.0 mg/L
CM-05
West Pile:
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
26 mg/L
790 mg/L
2,200 mg/kg
11,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
CM-06
West Pile:
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
67 mg/L
320 mg/L
2,000 mg/kg
9,300 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5.000 mg/kg
CM-07
West Pile:
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
46 mg/L
540 mg/L
2,100 mg/kg
12,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
CM-08
West Pile:
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
54 mg/L
1,100 mg/L
2,400 mg/kg
15,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5.000 mg/kg
CM-09
West Pile:
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
75 mg/L
690 mg/L
2,100 mg/kg
13,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
CM-10
West Pile: Northwest face.
Sample of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
Oily wastes. ORO.
presence of PCBs
81 mg/L
390 mg/L
1,700 mg/kg
8,800 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5.000 mg/kg
CM-11
West Pile: Northwest face. Oily
contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
Cadmium (STLC)
Oily wastes, ORO,
presence of PCBs
42 mg/L
320 mg/L
1,600 mg/kg
8.000 mg/kg
2.1 mg/L
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
1.0 mg/L
Definitions:
mg/kg = milligrams per kilogram
mg/L = milligrams per liter
ORO = oil range organics
PCB = polychlorinated biphenyl
STLC = soluble threshold limit concentration
TCLP = toxicity characteristic leaching procedure
TTLC = total threshold limit concentration
Notes:
Sample portions were all <100 micrograms unless denoted as liquids.
* = numbers in bold exceed the regulatory limits (STLC) or (TCLP)
** = Liquid sample
Reference:
DTSC, 2011
T-3 (1 of 2)
-------
Central Metal SI Report
September 2023
CAN000903324 TABLES
Sample
Number
Sample Deseription
Contaminant(s)
Result *
Regulatory
Limit
CM-12
East Pile of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
Oily wastes. ORO.
presence of PCBs
63 mg/L
550 mg/L
2,700 mg/kg
10,000 mg/kg
5.0 mg/L
250 mg/L
1.000 mg/kg
5.000 mg/kg
CM-13
East Pile of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
presence of PCBs
63 mg/L
550 mg/L
2,700 mg/kg
10,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
CM-14
East Pile of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
presence of PCBs
68 mg/L
780 mg/L
2,300 mg/kg
9,500 mg/kg
5.0 mg/L
250 mg/L
1.000 mg/kg
5.000 mg/kg
CM-15
East Pile of contaminated soils
Lead (STLC)
Zinc (STLC)
Lead (TTLC)
Zinc (TTLC)
presence of PCBs
95 mg/L
720 mg/L
2,800 mg/kg
11,000 mg/kg
5.0 mg/L
250 mg/L
1,000 mg/kg
5,000 mg/kg
CM-16
Sample from the puddle at llic
base of the electronic waste pile
Lead (STLC)
Mercury (cold vapor)
41 mg/L
0.74 mg/L
5.0 mg/L
0.2 mg/L
Definitions:
mg/kg = milligrams per kilogram
mg/L = milligrams per liter
ORO = oil range organics
PCB = polychlorinated biphenyl
STLC = soluble threshold limit concentration
TCLP = toxicity characteristic leaching procedure
TTLC = total threshold limit concentration
Notes:
Sample portions were all <100 micrograms unless denoted as liquids.
* = numbers in bold exceed the regulatory limits (STLC) or (TCLP)
** = Liquid sample
Reference:
DTSC, 2011
T-3 {2 of 2)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 4: 2018 CUPA Debris Pile Sampling Results Summary
Roll Away Bin
No.
Sample (Pail)
No.
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Residential RSL
31
0.68
15,000
160
7.1
„<1>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
Industrial RSL
470
3.0
220,000
2,300
100
350
47,000
800
46
5,800
22,000
5,800
5,800
12
5,800
350,000
Max Result
150
1,300
580
90
130
1,100
100
14,000
3,200
10
130
1,400
--
82
17
58
16,000
1
1-4
78
580
53
370
28
800
1.600
48
330
15
43
12,000
1-6
100
470
69
1,000
31
2,700
2.200
65
690
18
46
13,000
1-7
100
280
480
33
370
23
1,300
1.500
3.4
48
380
33
5.4
24
11,000
1-8
82
390
460
1.2
35
370
44
1,000
1.500
3.6
29
390
34
4.4
23
11,000
2
2-1
100
300
440
<0,80
39
580
24
1,500
1.900
2.7
49
520
<2,8
32
3.3
28
13,000
2-4
110
260
500
<0,80
76
530
30
1,900
1.400
3.2
53
370
<2,8
37
<2,5
30
10,000
2-6
120
240
440
<0,80
97
520
29
14,000
2.400
4.1
32
440
<2,8
33
2.6
28
11,000
2-9
43
<2.5
420
<0,80
53
290
25
1,100
1.100
<0,01
48
330
<2,8
16
<2,5
42
11,000
3
3-4
44
350
57
530
30
750
1.200
78
430
16
42
11,000
3-5
89
390
370
61
340
18
1,200
1.900
2.4
24
340
28
3.5
30
10,000
3-8
97
230
480
42
700
22
1,400
1.500
3.6
27
400
33
2.7
24
11,000
3-10
85
200
430
32
270
21
1,200
1.200
3.3
23
300
30
25
9,600
4
4-2
86
300
360
<0,80
47
460
22
940
1,100
2.1
47
370
<2,8
31
<2,5
24
11,000
4-5
67
<2.5
450
<0,80
72
990
43
1,200
1.400
3.9
63
710
<2,8
26
<2,5
45
11,000
4-6
42
<2.5
390
<0,80
72
360
27
1,300
1.400
2.4
54
330
<2,8
23
<2,5
42
10,000
4-7
50
<2.5
390
<0,80
72
630
30
870
1.200
<0,01
58
470
<2,8
16
<2,5
43
10,000
5
5-4
66
500
42
380
27
1,100
2.800
3.1
48
380
82
46
11,000
5-7
50
440
42
390
25
1,200
1.400
36
280
15
43
9,700
5-8
56
400
56
520
24
2,100
1.400
53
390
16
43
9,700
5-9
72
200
450
36
340
39
900
1.100
1.9
20
220
27
28
7,500
6
6-1
87
160
170
<0,80
31
230
21
550
610
2.1
39
170
<2,8
12
<2,5
28
7,100
6-3
52
<2.5
470
<0,80
48
320
40
990
1.400
<0,01
34
320
<2,8
68
<2,5
40
13,000
6-4
55
<2.5
420
<0,80
47
330
41
3,000
1.700
<0,01
45
380
<2,8
17
<2,5
46
11,000
6-10
86
220
370
<0,80
54
350
20
780
1.400
3.2
26
290
<2,8
32
<2,5
33
11,000
7
7-1
71
200
340
28
260
27
680
1.400
4.8
19
240
28
25
9,000
7-6
66
150
320
24
260
19
750
1.300
3
21
240
22
24
7,400
7-7
83
160
240
24
350
19
670
870
2.8
45
270
18
23
6,700
7-10
100
350
320
54
360
28
960
1.100
7.2
28
320
31
29
11,000
T-4 (1 of 3)
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Central Metal SI Report
CAN00903324
September 2023
TABLES
Roll Away Bin
No.
Sample (Pail)
No.
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Residential RSL
31
0.68
15,000
160
7.1
„<1>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
Industrial RSL
470
3.0
220,000
2,300
100
350
47,000
800
46
5,800
22,000
5,800
5,800
12
5,800
350,000
Max Result
150
1,300
580
90
130
1,100
100
14,000
3,200
10
130
1,400
-
82
17
58
16,000
8-1
110
230
270
<0,80
35
330
29
1,400
2.400
2.2
37
320
<2,8
34
7.2
20
9,900
8
8-5
94
200
280
<0,80
32
290
30
750
930
3.4
42
270
<2,8
15
6.5
30
8,100
8-6
47
<2.5
430
<0,80
38
450
34
870
1.100
2.8
60
550
<2,8
21
<2,5
46
11,000
8-8
90
190
220
<0,80
52
300
20
1,100
1.100
3.4
44
290
<2,8
33
6.3
36
7,300
9-2
45
310
41
370
25
1,400
1.800
2.5
59
340
22
47
11,000
9
9-3
90
260
330
28
210
20
1,600
760
3
27
240
17
5.7
21
6,900
9-9
120
230
210
48
310
14
470
1.100
2.5
33
260
15
8.4
28
5,100
9-10
75
220
270
34
270
26
890
1.600
3
130
670
30
4.4
19
6,900
10-3
100
190
290
<0,80
32
240
21
1,200
1.100
3
23
230
<2,8
16
5.8
24
8,300
10
10-4
73
160
170
<0,80
19
200
18
470
410
3.3
13
180
<2,8
11
3.2
23
6,300
10-8
58
<2.5
300
<0,80
25
370
31
630
1.000
<0,01
27
270
34
43
8,000
10-10
56
<2.5
310
<0,80
38
430
36
1,100
1.100
4.5
50
430
22
46
9,000
11-2
120
180
260
33
460
64
1,200
1.600
9.9
34
510
13
3.7
22
7,400
11
11-5
60
390
49
540
34
2,100
1.400
4.4
65
440
25
42
11,000
11-8
64
330
64
540
45
1,300
2.100
53
520
17
44
11,000
11-9
110
240
350
77
420
38
2,100
1.400
5.9
47
440
35
4.8
22
11,000
12-1
59
<2.5
350
<0,80
57
420
34
1,100
1.700
5.4
62
380
<2,8
25
<2,5
43
11,000
12
12-5
90
<2.5
360
<0,80
69
710
60
1,800
1.800
10
86
660
<2,8
30
<2,5
40
11,000
12-6
79
<2.5
450
<0,80
57
580
53
1,700
2.300
9.4
87
630
<2,8
30
<2,5
44
12,000
12-10
73
<2.5
410
<0,80
42
530
53
1,000
1.700
<0,01
63
580
<2,8
21
<2,5
42
9,900
13-1
81
410
46
430
58
1,100
3.000
61
540
21
40
10,000
13
13-2
91
380
4.2
57
360
46
1,800
3.200
53
400
19
39
11,000
13-3
89
170
250
3.5
36
280
81
1,400
1.200
9.9
41
330
15
20
7,300
13-5
99
180
260
55
310
28
1,400
1.600
7.2
42
280
16
4.6
22
7,200
14-2
100
230
290
<0,80
27
630
31
5,100
1.600
7.5
36
430
<2,8
19
4.8
19
7,400
14
14-6
90
<2.5
430
<0,80
45
540
43
1,600
2.300
7.9
93
490
<2,8
27
<2,5
44
11,000
14-9
62
<2.5
380
<0,80
42
530
94
2,400
1.200
<0,01
89
520
<2,8
22
<2,5
45
11,000
14-4
70
<2.5
290
1.7
38
570
37
1,200
1.200
<0,01
59
480
<2,8
22
<2,5
46
11,000
15-2
100
260
330
12
39
450
49
2,900
1.300
5.1
45
440
37
3.1
22
11,000
15
15-5
86
160
250
21
280
28
650
2.500
8.5
30
300
13
2.9
20
6,300
15-6
48
180
40
390
43
1,300
1.200
5.8
66
380
23
39
11,000
15-7
84
290
51
430
26
1,300
2.600
4.9
60
700
24
43
11,000
T-4 (2 of 3)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Roll Away Bin
No.
Sample (Pail)
No.
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Residential RSL
31
0.68
15,000
160
7.1
„<1>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
Industrial RSL
470
3.0
220,000
2,300
100
350
47,000
800
46
5,800
22,000
5,800
5,800
12
5,800
350,000
Max Result
150
1,300
580
90
130
1,100
100
14,000
3,200
10
130
1,400
--
82
17
58
16,000
16
16-1
92
190
240
<0,80
29
400
25
760
870
6.4
47
310
<2,8
14
<2,5
17
6,400
16-5
70
<2.5
360
<0,80
55
430
40
1,300
1.500
6.2
78
420
<2,8
24
<2,5
43
12,000
16-7
80
<2.5
500
<0,80
48
470
38
1,100
1.500
7.4
80
430
<2,8
24
<2,5
53
11,000
16-9
110
210
290
29
310
29
1,500
1.100
6.3
50
300
16
5.2
22
7,500
17
17-1
82
430
2.9
62
660
54
2,800
1.900
8.3
110
1,400
27
2.9
42
13,000
17-4
120
190
290
26
330
39
1,500
2.000
9
40
340
15
3.5
23
9,100
17-5
100
470
40
550
55
1,900
2.300
7.4
80
550
24
42
13,000
17-6
90
450
41
470
53
4,300
2.300
7.2
94
620
27
49
16,000
18
18-3
110
<2.5
500
90
34
1,100
100
6,600
1.400
<0,01
62
440
<2,8
19
<2,5
39
11,000
18-5
110
<2.5
460
<0,80
120
560
61
2,300
2.900
6.8
110
850
<2,8
25
<2,5
45
13,000
18-7
79
<2.5
550
<0,80
47
730
79
2,100
2.000
5.2
110
550
<2,8
27
<2,5
58
12,000
18-9
78
<2.5
330
<0,80
36
650
50
1,400
1.400
<0,01
49
700
<2,8
17
<2,5
38
10,000
19
19-3
120
1.100
370
36
640
55
1,000
1.600
5.9
80
450
40
5.3
24
10,000
19-4
110
260
390
41
450
45
1,200
1.500
6.7
69
530
37
4.6
21
11,000
19-5
120
180
240
36
560
29
1,500
2.300
6.8
46
430
22
3.3
18
7,300
19-18
110
250
400
130
570
54
960
1.400
6.9
50
510
37
4.2
21
11,000
20
20-1
110
230
410
<0,80
31
860
32
2,700
1.000
3.7
92
660
<2,8
31
3.4
15
9,100
20-2
77
210
290
<0,80
28
260
22
730
1.300
3.7
28
230
<2,8
28
2.9
19
8,600
20-5
94
230
360
<0,80
33
420
45
2,100
1.700
5.5
43
360
<2,8
34
6
18
8,900
20-8
150
320
440
<0,80
61
360
33
3,300
1.500
5.0
70
490
<2,8
27
XL
34
11,000
21
21-4
98
230
310
25
740
47
3,000
1.500
4.0
54
590
34
4.5
15
7,400
21-5
96
170
310
23
270
27
590
800
4.4
30
250
17
20
6,900
21-6
110
1.300
450
18
180
12
700
910
2.4
34
180
19
11
20
4,100
21-7
100
200
370
30
340
20
1,600
1.800
3.7
34
330
34
18
8,200
^otes:
All units are In milligrams per kilogram (mg/kg)
Values in Bold exceed residential Regional Screening Level (RSL) (May 2023; THQ =1.0, Risk = 10-6)
Values in Bold and Underlined exceed industrial RSI CMav ?0?3- THO =1 0 Risk = 10-fil
1 = an RSL for Total (i.e., unspeciated) chromium has not been established.
Reference:
Brash, 2019
T-4 (3 of 3)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 5: Soil Vapor Survey Results - Select VOCs
Sample
Location
Sample
Depth
(ft-bgs)
Analyte (Mg/mJ)
1,1,1 -T richloroethane
1,2,4-Tri methyl be n ze n e
4-lsopropyltoluene
Bromodichloromethane
Bromoform
Carbon Tetrachloride
Dibromomethane
Dichlorodifluoromethane
Ethylbenzene
Freon 113
m,p-Xylene
Methylene chloride
o-Xylene
Tetrachloroethylene
Toluene
Trichlorofluoromethane
Resident VISL
174,000
2,090
--
2.5
85
16
139
3,480
37
174,000
3,480
3,380
3,480
360
174,000
--
Commercial VISL
730,000
8,760
-
11
372
68
584
14,600
164
730,000
14,600
40,900
14,600
1,570
730,000
-
SV-1
5.5
, -
, -
, -
375
45
, -
,
36
11
390
16
467
45
32
356
SV-2
6.5
15
79
371
8.0
28
36
12
84
12
181
16
23
631
58
166
359
SV-3
6.0
' '
22
' 1
' 1
180
11
33
50
16
62
106
16
' '
23
' 1
' 1
200
34
' 1
' .
55
105
SV-4
6.0
29
111
23
169
94
16
21
121
109
20
24
10
132
83
SV-5
6.0
' '
' 1
' 1
165
24
' '
' '
38
141
16
' '
' 1
' '
243
30
' '
' '
45
170
SV-6 <1)
--
--
--
--
--
--
--
--
--
-
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
-
--
--
--
--
--
--
--
SV-7
6.0
' '
' 1
' '
137
35
' '
' '
41
165
15.5
' '
' '
' '
157
35
' '
' '
59
168
SV-8
6.0
81 / 97
20/23
151 /184
104/127
16
ND
ND
ND
ND
ND
ND
ND
115
ND
29
ND
ND
ND
161
17
148
SV-9
5.5
22
' '
' '
' '
' '
86
' '
' '
' '
19
128
15.5
25
' '
' '
' '
' '
99
' '
19
' '
' '
22
14
157
SV-10
6.0
18
40
21
162
262
15.5
12
56
27
28
20
314
SV-11
5.5
26
101
13
236
16
t '
15
t '
9.0
53
t '
33
t '
t '
339
11
424
SV-12
6.5
26
60
101
57
9.0
1,310
14.5
35
76
109
103
1,380
SV-13 (1)
3.0
137
222
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SV-14
6.5
18
26
2,530
468
16
24
25
37
2,190
12
682
SV-15
6
73
13
22
60
11
404
15.5
99
t '
t '
t '
t '
31
t '
t '
113
511
SV-16
6.0
19
68
332
15.5
44/43
80/
20/24
74/72
388 / 403
SV-17
6.0
28
77
16
t '
t '
t '
t '
t '
t , 1
t '
t , 1
t '
52
t , 1
97
SV-18
6.0
ND
ND
9.0
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
147
ND
37
16
20
156
39
SV-19
6.0
16
8.0
SV-20
6.0
ND
10
34
13
16
ND
13
52
ND
1,920
20
12
ND
22
14
26
15.5
ND
ND
ND
ND
ND
ND
ND
60
ND
2,240
ND
ND
ND
35
10
17
Notes
All values are reported in |jg/m3
Bold and Underlined values indicate results that exceed Resident VISL
Samples collected in April 2019
All other reported analytes did not exceed analytical reporting limits
1 = no value indicates that a probe was not installed due to early refusal
Definitions
ft-bgs = feet below ground surface
ND = Analyte did not exceed analytical reporting limit
VISL = EPA Vapor Intrusion Screening Level (May 2023, Target Sub-Slab, THQ =1 0. Risk = 10"6)
Mg/m3 = micrograms per cubic meter
T-5 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 6: Stage 1 Soil Sampling Results - Select Metals
Sample
Location
Sample Depth
(ft)
Analyte
Arsenic
(As)
Cadmium
(Cd)
Cobalt
(Co)
Lead
(Pb)
Zinc
(Zn)
Source Action Level(1)
14
0.66
69
41
450
Residential RSL
0.68
7.1
23
400
23,000
Industrial RSL
3.0
100
350
800
350,000
SV-1
2
3.3
0.22J
17
8.0
103J
10
0.83
<0.45
5.2
1.6
41J
SV-2
2
2.7
0.18J
13
14
108J
10
0.89
<0.49
4.1
1.5
25J
SV3
2
2.5
0.13J
12
7.5
74J
10
0.97
0.093J
4.6
1.3
20J
SV4
2
2.6
0.16J
13
5.5
81J
10
1.0
<0.45
4.2
1.4
26J
SV-5
2
3.1
0.25J
21
7.1
92J
10
0.76
3.2
1.3
21J
SV-6(2)
2
8.3
2.5
61
338
490 J
SV-7
2
2.3
0.22J
6.4
27
41J
10
1.1
4.9
6.5
31J
SV-8
2
3.2/2.3
0.20J/0.14J
14/13J
31 /11J+
91J/ 80J+
10
2.9
<0.47
3.5J
1.8
19
SV-9
2
7.9J
1.3 J
91
170
190
10
1.3
4.6J
1.7
25
SV-10
2
2.7J
<0.56
11
4.5
62
10
1.6
<0.51
5.2
1.8
27
SV-11
2
3.6J/2.7
<0.56/0.13J
13/13J
13 /13J+
84 / 85J+
10
0.93J
<0,50
4.1J
1.2
20
SV-12
2
22 J
<0.00
38J
33J
65J
10
2.6J
<0.54
9.9
3.6
58
SV-13(2)
2
16 J
10
12
86
SV-14
2
2.2/2.3
0.11J/ 0.12J
9.7J/11J
4 0J+/4.6J+
58J+/ 64J+
10
0.75
<0.51
2.8J
1.0J+
18J+
SV-15
2
3.8
0.25J
17J
6.1J+
90J+
10
1.3
4.2J
1.5J+
26J+
SV-16
2
2.6
0.12J
13J
4.3J+
76J+
10
0.64
<0,44
3.3J
1.3J+
21J+
SV-17
2
5.5/5.0
1.4/1.4
13J/13J
301 J+/199 J+
778 J+/ 464 J+
10
0.96
4.2J
2.0J+
28J+
SV-18
2
3.0
0.63
8.9J
170 J+
367J+
10
1.2
<0.48
5.1J
2.2J+
31J+
SV-19
2
5.4
1.1
16J
90 J+
612 J+
10
0.74
4.9J
2.0J+
33J+
SV-20
2
2.0
0.13J
9.8J
6.3J+
65J+
10
1.2
<0.48
3.9J
1.4J+
23J+
Notes:
All values are reported in mg/kg
Bold & Underlined values indicate results that exceed Source Action Level
Samples collected in April 2019
1 = Per the HRS, the action level to establish an on-site source of contaminated soil is 'significantly above background" (see Section 3.2.1).
Source Action Levels:
Antimony = 7.9 Lead = 41
Arsenic = 14 Manganese = 2,240
Barium = 861 Nickel = 83
Beryllium = 1.3 Selenium = 4.6
Cadmium = 0.66 Silver = 1.3
Chromium = 130 Thallium = 3.3
Cobalt = 69 Vanadium = 263
Copper = 111 Zinc = 450
Definitions:
J = The result is an estimated quantity
J+ = The result is an estimated quantity, but the result may be biased high
J- = The result is an estimated quantity, but the result may be biased low
mg/kg = milligram per kilogram
RSL = EPA Regional Screening Level (May 2023; THQ =1.0, Risk = 10-6)
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
T-6 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 7: Stage 2 Soil Sampling Results - Select Metals
Sample
Location
Sample Depth
(ft)
Analyte
Arsenic
(As)
Cadmium
(Cd)
Cobalt
(Co)
Lead
(Pb)
Zinc
(Zn)
Source Action Level(1)
14
0.66
69
41
450
Residential RSL
0.68
7.1
23
400
23,000
Industrial RSL
3.0
100
350
800
350,000
DP-1
2
9.6J
1.1 J
12J
138
183
5
2.0 / 2.7J
<0.52 / <0,49
6.4J/ 7.3J
2.0/2.0
33/42
10
2.4/ 1.9J
<0,52 / <0,49
5.9J/5.4J
1.9/1.3
29/29
15
4.9J
<0,60
12J
7.7
72
DP-2
2
3.5
0.65J
6.2J
138
263
5
4.9J
<0.57
11J
13
104
10
2.3
<0.60
<0.0
1.7
24
15
2.2
<0,48
5.9J
1.9
27
DP-3
3
3.4J
11 j
29J
90
5
2.5J
22J
6.2J
69
10
1.6J
5.8J
2.3J
31
15
3.6J
13J
4.6J
78
DP-4
2
6.0J
<0.56
5.8J
203
94
5
4.0J
<0,55
9.9J
4.0
60
10
1.8J
<0,53
5.7J
1.8
26
15
2.9J
<0,52
6.6J
2.1
37
DP-5
2
3.1J
11 j
4.9J
64
5
1.4J
6.8J
2.4J
37
10
2.2J
1.4J
20
15
4.7J
15J
6.6J
91
DP-6
2
4.9J
<0,54
12J
5.0
69
5
2.0J/2.4J
<0,52/<0,52
<5.2/6.4J
1.5/1.9
28/35
10
1.7J
<0,49
<4.9
1.1
22
15
6.8J
<0,53
8.9J
3.0
54
DP-7
2
8.3J
7.6 J
13J
612
3.160
5
2.6
5.7J
2.1
28
10
2.2
1.6
21
15
2.8
7.0J
2.6
36
DP-8
2
5.3J
0.56J
12J
49
161
5
6.2J/7.8J
<0.04 / <0.06
16J/19J
5.9J/6.8J
94/109
10
2.3J
<0,48
6.8J
1.9
38
15
4.1J
<0,50
12J
3.8
75
DP-9
2
13J
2.4 J
11J
152
661
5
6.4J
0.74 J
19J
15
120
10
2.1
1.6
23
15
2.4
5.8J
2.2
28
DP-10
2
2.6J
<0,53
11J
8.5J
65
5
2.1J
<0,55
8.5J
3.2J
47
10
0.74J
<0,49
<4.9
1.3J
21
15
3.4J
<0,00
16J
5.1J
95
Notes:
All values are reported in mg/kg
Bold & Underlined values indicate results that exceed Source Action
Level
Samples collected in June 2019
1 = Per the HRS, the action level to establish an on-site source of
contaminated soil is 'significantly above background" (see
Section 3.2.1).
Definitions:
J = The result is an estimated quantity
J+ = The result is an estimated quantity, but the result may be biased high
J- = The result is an estimated quantity, but the result may be biased low
mg/kg = milligram per kilogram
RSL = EPA Regional Screening Level (May 2023; THQ =1.0, Risk = 10-6)
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
T-7 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 8: Stage 2 Groundwater Sampling Results Summary - Select Analytes
Sample
Location
Screened
Interval
(ft-bgs)
Analyte
VOCs
Total Metals
Acetone
t-1,2-DCE
TCE
Arsenic
(As)
Cadmium
(Cd)
Cobalt
(Co)
Lead
(Pb)
Zinc
(Zn)
Federal MCL
--
100
5.0
Not Applicable <1>
CPT-1
96-100
3.1J
<0,50
<0,50
35
<5,0
64J
66
619
CPT-2
95-99
4.6J
0.12J
0.21 J
51J
50J
590J
455J-
5,080J
CPT-3
92-96
<5 0/3.6J
<0,50 /<0,5G
<0,50 /<0,5G
40J/ 28J
<25 /<10
276J/182J
155J/125J
1,760J/1,290J
CPT-4
96-100
14
0.15J
<0,50
100J
31 J
<250
935J-
33,300J
CPT-5
99-103
5.1
<0,50
<0,50
27
<5,0
51J
43
476
Notes:
All values are reported in micrograms per liter (ng/L)
Samples collected in June 2019
1 = Total Metal concentrations are not comparable to regulatory benchmarks derived from Dissolved Metal criteria,
such as MCLs.
Qualifier Definitions:
J = The result is an estimated quantity
J+ = The result is an estimated quantity, but the result may be biased high
J- = The result is an estimated quantity, but the result may be biased low
Definitions:
MCL = Maximum Contaminant Level
t-1,2-DCE = T rans-1,2-dichloroethylene
TCE = T richloroethylene
VOC = Volatile Organic Compound
[jg/L = microgram per liter
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
T-8 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 9: Stage 3 - Residential Soil Samp
ing - HRS Soil Screening Benchmarks
Analyte
HRS Soil Screening
Benchmark(1)
Residential
rsl(2)
Industrial
rsl(2)
Antimony
5.9
31
470
Arsenic
22
0.68
3.0
Barium
459
15,000
220,000
Beryllium
1.3
160
2,300
Cadmium
3.1
7.1
100
Chromium
65
(2)
(2)
Cobalt
26
23
350
Copper
142
3,100
47,000
Lead
401
400
800
Mercury
0.53
11
46
Molybdenum
3.3
390
5,800
Nickel
84
1,500
22,000
Selenium
9.2
390
5,800
Silver
4.7
390
5,800
Thallium
3.9
0.78
12
Vanadium
107
390
5,800
Zinc
630
23,000
350,000
Notes:
1 = The HRS Soil Screening Benchmark is used to establish a harardous substance release in the HRS soil exposure pathway and is based
on three times the background soil concentration. See Section 3.2.1.3 for a description of the methodology used to develop these values.
2 = EPA RSLs are presented for contextual purposes but are not appropriate for use as benchmarks under the HRS.
3 = an RSL for Total (i.e., unspeciated) chromium has not been established.
Definitions:
HRS =Hazard Ranking System
RSL = EPA Regional Screening Level (May 2023; THQ =1.0, Risk = 10-6)
T-9 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 10: Stage 3 - Residential Soil Sampling Results - Four-Point Composite
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
HR1A01
HR1A01-01
Front
0.95 JQK
9.1
170
<0.97
1.1
25
12
39
140
0.11
10 JQK
28 JK
<4.9
<2.4
17 JQK
44
200
HR1A01
HR1A01-02
Front
4.6
19
330
<1.1
1.4
29
14
65
150
0.17
0.91 JQK
25 JK
<5.5
<2.7
2.0 JQK
49
260
HR1A01
HR1A01-03
Front
12 JQK
8.6
190
<1.2
1.3
27
14
38
110
0.13
0.85 JQK
26 JK
<6.0
<3.0
1.9 JQK
50
250
HR1A01
HR1A01-03|D)
Front
12 JQK
10
190
<1.1
0.74 JQK
28
14
40
110
0.16
0.84 JQK
39
<5.6
<2.8
<5.6
53
260
HR1A02
HR1A02-01
Front
0.61 JQK
4.4
150
<1.0
0.97 JQK
28
13
42
89
0.11
0.91 JQK
21 JK
<5.2
<2.6
2.0 JQK
49
170
HR1A02
HR1A02-02
Rear
13 JQK
9.5
220
<1.1
1.9
51
13
55
170
0.25
0.83 JQK
24 JK
<5.3
<2.6
14 JQK
47
280
HR1A02
HR1A02-03
Rear
18 JQK
9.8
230
<0.92
2.4
49
13
70
270
0.26
1.2 JQK
26 JK
<4.6
0.55 JQK
19 JQK
47
380
HR1A03
HR1A03-01
Front
0.50 JQK
5.8
160
0.62 JQK
1.4
25
10
48
140 JK
0.20 JK
1.5 JQK
23
<6.2
<3.1
1.3 JQK
41
270
RZ-1a
HR1A03
HR1A03-02
Rear
16 JQK
5.0
460
0.63 JQK
1.8
32
11
75
380 JK
0.17 JK
H JQK
26
<5.5
0.62 JQK
1.0 JQK
42
570
HR1A03
HR1A03-03
Rear
12 JQK
4.4
200
0.69 JQK
1.4
28
12
44
120 JK
0.17 JK
1.0 JQK
22
0.47 JQK
<2.7
H JQK
46
290
HR1A04
HR1A04-01
Front
1.7 JQK
6.3
160 JK
<0.95
4.0
28
12
54
150
0.13 JK
1.7 JQK
27
<4.8
<2.4
<4.8
46 JK
500
HR1A04
HR1A04-02
Rear
14 JQK
7.1
200 JK
<1.0
1.3
27
12
58
130
0.12 JK
14 JQK
23
<5.1
<2.5
<5.1
47 JK
320
HR1A04
HR1A04-03
Rear
10 JQK
7.7
200 JK
<1.0
0.69 JQK
26
13
110
140
0.12 JK
0.95 JQK
32
<5.1
<2.6
<5.1
48 JK
380
HR1A05
HR1A05-01
Rear
16 JQK
4.7
190 JK
0.43 JQK
1.5
25
8.5
50
180
0.13 JK
1.4 JQK
21
<4.9
<2.4
H JQK
35 JK
350
HR1A05
HR1A05-02
Rear
18 JQK
5.1
240 JK
0.50 JQK
1.5
27
9.6
56
210
0.15 JK
1.4 JQK
27
<5.0
<2.5
<5.0
39 JK
400
HR1A05
HR1A05-03
Rear
15 JQK
5.3
340 JK
0.53 JQK
1.6
29
10
73
250
0.28 JK
1.0 JQK
20
<5.1
<2.6
2.0 JQK
38 JK
620
HR1A05
HR1A05-03(D)
Rear
1.7 JQK
5.2
380
0.53 JQK
2.0
28
11
73
270 JK
0.22 JK
10 JQK
20
<5.1
0.63 JQK
0.98 JQK
40
660
HR1B01
HR1B01-01
Front
<2.8
2.9
86 JK
<0.95
0.61 JQK
14
6.9
22
75
0.081 JK
0.47 JQK
11
<4.7
<2.4
<4.7
29 JK
110
HR1B01
HR1B01-02
Rear
2 JQK
3.3
170 JK
<1.0
2.3
22
6.5
45
280
0.14 JK
1 4 JQK
18
<5.2
<2.6
<5.2
27 JK
180
HR1B01
HR1B01-03
Rear
0.91 JQK
5.0
280 JK
<0.97
2.1
23
7.0
46
300
0.16 JK
0.91 JQK
14
<4.8
<2.4
<4.8
27 JK
400
HR1B01
HR1B01-03(D|
Rear
1 4 JQK
5.0
310
<1.0
1.6
27
6.4
44
310
0.15
0.98 JQK
14
<5.2
<2.6
<5.2
24
410
HR1B02
HR1B02-01
Front
1.0 JQK
4.3
140 JK
<0.94
2.1
25
12
40
170
0.19 JK
0.83 JQK
20
<4.7
<2.3
<4.7
45 JK
250
HR1B02
HR1B02-02
Rear
1.3 JQK
4.7
210 JK
<0.91
1.1
23
9.9
40
230
0.22 JK
0.85 JQK
17
<4.6
<2.3
<4.6
41 JK
230
HR1B02
HR1B02-03
Rear
1.2 JQK
7.5
270 JK
<0.96
1.6
25
12
56
190
0.18 JK
0.46 JQK
16
<4.8
<2.4
<4.8
45 JK
440
HR1B03
HR1B03-01
Front
0.97 JQK
7.2
160 JK
<0.87
3.7
51
12
60
140
0.99
0.78 JQK
30 JK
<4.4
-J -J JQK
2 Q JQK
45
260 JK
HR1B03
HR1B03-02
Rear
1.3 JQK
4.8
210 JK
<0.93
1.5
33
9.4
46
240
0.44 JK
0.93 JQK
23 JK
<4.6
0.81 JQK
1.3 JQK
38
280
HR1B03
HR1B03-03
Rear
-j q JQK
5.2
170 JK
<0.89
2.1
38
11
43
200
0.35 JK
0.74 JQK
17 JK
<4.4
0.75 JQK
-J g JQK
42
330
HR1B04
HR1B04-01
Front
2.3 JQK
51
150 JK
<1.1
1.0 JQK
24
12
38
110
0.22 JK
0.86 JQK
19 JK
<5.3
<2.6
2.1 JQK
46
200
HR1B04
HR1B04-02
Front
1.9 JQK
64
160 JK
<0.91
0.80 JQK
26
14
34
67
0.10 JK
0.77 JQK
20 JK
<4.5
<2.3
2.1 JQK
52
140
HR1B04
HR1B04-03
Front
1.0 JQK
29
140 JK
<0.95
0.82 JQK
24
12
31
75
0.11 JK
0.96 JQK
18 JK
<4.7
<2.4
1.4 JQK
51
200
HR1B05
HR1B05-01
Front
1 2 JQK
6.1
170 JK
<0.93
1.4
27
13
51
210
0.21 JK
-| -| JQK
33 JK
<4.6
<2.3
2.0 JQK
48
290
HR1B05
HR1B05-02
Front
2.7 JK
5.1
160 JK
<0.75
2.4
27
12
55
180
0.14 JK
2 JQK
22 JK
<3.7
<1.9
<3.7
47
290
RZ-1 b
HR1B05
HR1B05-03
Rear
2.3 JK
4.9
220 JK
<0.73
3.5
27
12
46
200
0.18 JK
0.79 JQK
31 JK
<3.6
<1.8
<3.6
46
290
HR1B06
HR1B06-01
Rear
0.89 JQK
4.7 JK
200
<0.59
1.3
23
18
68
170
0.15 JK
1.1 JQK
17
<2.9
0.45 JQK
0.68 JQK
29
310
HR1B06
HR1B06-02
Front
0.32 JQK
2.3 JK
98
<0.77
0.75 JQK
15
5.8
29
67
0.10 JK
0.55 JQK
13
<3.9
<1.9
0.96 JQK
24
170
HR1B06
HR1B06-03
Front
0.71 JQK
2.6 JK
100
<0.58
1.0 JK
17
6.2
31
100
0.26 JK
0.64 JQK
14
<2.9
<1.4
0.86 JQK
25
180
HR1B07
HR1B07-01
Front
2.6
9.9 JK
190
<0.64
2.7 JK
34
14
67
140
0.30 JK
2.0
35
0.53 JQK
<1.6
<3.2
50
280
HR1B07
HR1B07-02
Rear
2.2
8.7 JK
200
<0.69
2.6 JK
31
15
50
130
0.23 JK
0.95 JQK
32
<3.5
<1.7
<3.5
51
270
HR1B07
HR1B07-03
Rear
3.2
13 JK
210
<1.0
3.1 JK
35
15
67
150
0.24 JK
1.6 JQK
30
<5.1
<2.6
<5.1
54
380
HR1B08
HR1B08-01
Front
0.95 JQh
2.3 JQK
120 JK
0.25 JQK
1.8
24
4.8
30
180
0.33 JK
0.72 JQK
16
<5.1
<2.6
<5.1
22 JK
200
HR1B08
HR1B08-02
Rear
0.93 JQh
5.2
220 JK
0.36 JQK
2.7
38
7.7
51
270
0.20 JK
0 96 JQK
25
<4.7
<2.3
0.57 JQK
31 JK
520
HR1B08
HR1B08-03
Rear
1.3 JQh
4.2
200 JK
0.38 JQK
1.8
29
7.9
44
200
0.71 JK
0.72 JQh
17
<4.6
<2.3
<4.6
33 JK
380
HR1B09
HR1B09-01
Front
0.79 JQh
5.0
140 JK
<0.93
0.70 JQK
23
11
43
86
0.10 JK
0.97 JQh
17 JK
<4.6
<2.3
19 JQK
45
220
HR1B09
HR1B09-02
Rear
1 4 JQK
4.3
170 JK
<0.80
1.3
25
10
46
150
0.16 JK
0.89 JQK
16 JK
<4.0
<2.0
0.89 JQK
40
270
HR1B09
HR1B09-03
Rear
0.93 JQK
7.5
160 JK
<0.83
0.86
24
11
53
140
0.12 JK
-| -| JQK
17 JK
<4.1
<2.1
1.6 JQK
42
240
HR1B10
HR1B10-01
Front
0.77 JQK
3.2
110 JK
<0.77
0.71 JQK
21
8.2
33
78
0.10 JK
0.56 JQK
26 JK
<3.8
<1.9
0.82 JQK
34
190
HR1B10
HR1B10-02
Rear
<2.8
5.5
120 JK
<0.94
1.0
36
7.2
29
110
0.095 JK
0.39 JQK
10 JK
<4.7
<2.3
<4.7
37
190
HR1B10
HR1B10-03
Rear
0.89 JQK
6.0
190 JK
<0.75
1.6
40
8.0
36
190
0.18 JK
0.60 JQK
13 JK
<3.7
0.75 JQK
0.39 JQK
36
320
HR1B10
HR1B10-03(D)
Rear
1.1 JQK
6.9
220
<1.0
2.1
43
8.4
42
240
0.18
0.86 JQK
14
<5.1
<2.6
<5.1
34
410
T-10 (1 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
HR1C01
HR1C01-01
Front
-| -| JQK
7.6
180 JK
<0.99
0.80 JQK
32
14
51
150
0.17 JK
1.3 JQK
23
<4.9
<2.5
<4.9
55 JK
260
HR1C01
HR1C01-02
Rear
2 2 J^k
8.3
290 JK
<0.87
1.6
44
13
110
430
0.14 JK
4.3
82
<4.3
0.50 JQK
<4.3
41 JK
460
HR1C01
HR1C01-03
Rear
-| 4 JQK
5.9
230 JK
<0.98
1.3
32
14
73
200
0.12 JK
16 JQK
35
<4.9
<2.5
<4.9
50 JK
400
HR1C02
HR1C02-01
Front
0.80 JQK
5.1
170
0.47 JQK
1.2
28
9.0
46
120 JK
0.15 JK
0.85 JQK
20
<5.7
<2.8
0.64 JQK
38
200
HR1C02
HR1C02-01(D|
Front
0.52 JQK
5.0
150
0.45 JQK
1.2
28
9.0
43
120 JK
0.15 JK
0.77 JQK
20
<5.9
<2.9
H JQK
37
200
HR1C02
HR1C02-02
Front
<3.2
3.9
130
0.36 JQK
1.2
23
7.1
42
110 JK
0.19 JK
0.47 JQK
13
<5.4
<2.7
0.73 JQK
24
260
HR1C02
HR1C02-03
Front
0.63 JQK
6.3
150
0.45 JQK
1.5
30
8.7
50
150 JK
0.23 JK
0.86 JQK
24
<5.3
<2.7
<5.3
36
360
HR1C03
HR1C03-01
Front
2.3 JQK
5.5
160 JK
<1.1
2.9
29
13
63
170
0.24 JK
10 JQK
23
<5.4
<2.7
<5.4
50 JK
280
HR1C03
HR1C03-02
Rear
1.7 JQK
5.9
200 JK
<1.0
1.4
33
14
79
170
0.14 JK
14 JQK
33
<5.2
<2.6
<5.2
52 JK
350
HR1C03
HR1C03-03
Rear
12 JQK
5.1
190 JK
<1.0
1.0
28
13
57
130
0.13 JK
0.74 JQK
44
<5.1
<2.5
<5.1
50 JK
210
HR1C04
HR1C04-01
Front
0.60 JQK
5.5
180 JK
<1.0
0.91 JQK
19
7.3
34 JK
250
0.18
0.45 JQK
13
<5.0
<2.5
<5.0
32 JK
490
HR1C04
HR1C04-02
Rear
0.70 JQK
5.8
200 JK
<1.0
0.77 JQK
19
6.9
31 JK
230
0.17
0.41 JQK
15
<5.0
<2.5
<5.0
29 JK
440
RZ-1c
HR1C04
HR1C04-03
Rear
0.97 JQK
7.2
130 JK
<1.0
0.92 JQK
28
8.1
58 JK
260
0.16
0.95 JQK
16
<5.0
<2.5
<5.0
37 JK
300
HR1C05
HR1C05-01
Front
2.5
4.1
140 JK
<0.56
3.0
24
11
70 JK
270 JK
0.20
1.1
24 JK
<2.8
<1.4
<2.8
41 JK
270
HR1C05
HR1C05-02
Rear
0.61 JQK
5.3 JK
140
<1.0
1.0
22
13
45 JK
150 JK
0.18
0.91 JQK
47 JK
<5.0
<2.5
<5.0
46 JK
240
HR1C05
HR1C05-03
Rear
2.6
3.4
140 JK
<0.53
3.9
24
11
59 JK
290 JK
0.15
1.1
25 JK
<2.7
<1.3
<2.7
40 JK
300
HR1C06
HR1C06-01
Front
0.73 JQK
3.4
96 JK
<0.98
0.92 JQK
24
7.1
36
120
0.18 JK
0.50 JQK
17
<4.9
<2.5
<4.9
31 JK
160
HR1C06
HR1C06-01(D)
Front
0.70 JQK
3.0
94
<0.84
1.3
24
7.1
36
110
0.17 JK
0.61 JQK
17
<4.2
0.53 JQK
1.3 JQK
30 JK
150
HR1C06
HR1C06-02
Front
0.96 JQK
4.4
110 JK
<0.96
2.3
29
7.3
44
150
0.19 JK
0.63 JQK
28
<4.8
0.61 JQK
<4.8
32 JK
220
HR1C06
HR1C06-02(D)
Front
0.63 JQK
3.5
100
<0.56
2.1
28
7.2
41
140
0.21 JK
0.60 JQK
27
<2.8
0.51 JQK
16 JQK
30 JK
210
HR1C06
HR1C06-03
Front
0.99 JQK
4.4
130 JK
<0.96
1.1
28
8.7
42
150
0.15 JK
0.60 JQK
18
<4.8
0.58 JQK
<4.8
37 JK
210
HR1C06
HR1C06-03(D)
Front
0.76 JQK
3.7
170
<0.80
1.4
26
8.0
40
170
0.19 JK
0.60 JQK
17
<4.0
0.47 JQK
14 JQK
33 JK
190
HR1C07
HR1C07-01
Front
0.82 JQK
5.7
720
<1.3
2.6
41
14
57
250
0.20
14 JQK
26 JK
<6.4
<3.2
2.1 JQK
50
530
HR1C07
HR1C07-02
Rear
18 JQK
4.9
210
<1.0
1.6
30
13
55
180
0.24
0.92 JQK
22 JK
<5.2
<2.6
2.2 JQK
48
260
HR1C07
HR1C07-03
Rear
1.2 JQK
4.8
270
<1.0
1.5
29
12
60
190
0.13
1.3 JQK
22 JK
<5.2
<2.6
14 JQK
45
280
HR2A01
HR2A01-01
Rear
1.1 JQK
6.1 JK
280
<1.1
2.2 JK
31
13
700
910
0.50 JK
14 JQK
34
<5.4
<2.7
18 JQK
51
490
HR2A01
HR2A01-02
Rear
0.90 JQK
6.3 JK
250
<1.2
2.2 JK
33
12
60
740
0.38 JK
H JQK
63
<6.1
<3.1
2.0 JQK
48
410
HR2A01
HR2A01-03
Front
0.84 JQK
7.6 JK
210
<0.89
3.0 JK
46
13
74
440
0.58 JK
0.98 JQK
23
<4.4
0.89 JQK
1.9 JQK
51
290
HR2A02
HR2A02-01
Front
0.47 JQK
4.2
100 JK
<0.97
1.0
34
7.5
23 JK
140
0.26 JK
0.73 JQK
15
<4.8
<2.4
0.69 JQK
32 JK
180
HR2A02
HR2A02-02
Rear
-j ~i JQK
12
200 JK
<0.72
2.0
77
9.1
43 JK
210
0.26 JK
2.7
21
<3.6
0.46 JQK
-j 0 JQK
38 JK
380
HR2A02
HR2A02-03
Rear
-| g JQK
10
220 JK
<0.92
2.1
62
8.9
42 JK
310
0.25 JK
-| y JQK
19
<4.6
<2.3
0.98 JQK
38 JK
450
HR2A03
HR2A03-01
Front
0.60 JQK
3.3
100 JK
<1.1
0.71 JQK
18
7.9
22 JK
76
0.12 JK
0.75 JQK
16
<5.3
<2.7
1.3 JQK
34 JK
140
HR2A03
HR2A03-02
Front
0.36 JQK
3.2
100 JK
<0.74
0.80
19
8.0
22 JK
77
0.097 JK
0.77 JQK
13
<3.7
<1.8
10 JQK
34 JK
160
HR2A03
HR2A03-03
Rear
0.40 JQK
5.1
120 JK
<1.1
0.99 JQK
20
8.6
45 JK
96
0.15 JK
0.89 JQK
15
<5.4
<2.7
15 JQK
37 JK
270
HR2A04
HR2A04-01
Front
0.61 JQK
3.0
260
0.36 JQK
1.2
23
7.0
38
150 JK
0.10 JK
1.3 JQK
18
<4.8
<2.4
0.58 JQK
29
220
HR2A04
HR2A04-02
Rear
-| -| JQK
2 g JQK
130
0.26 JQK
1.5
18
5.5
42
270 JK
0.21 JK
-| -| JQK
24
<5.1
<2.5
<5.1
24
370
RZ-2a
HR2A04
HR2A04-02(D|
Rear
-| Q JQK
3.2
140
0.30 JQK
1.6
19
6.1
42
230 JK
0.55 JK
0.67 JQK
26
<5.1
<2.5
<5.1
27
370
HR2A04
HR2A04-03
Rear
1 2 JQK
3.0
120
0.31 JQK
1.5
20
6.5
44
170 JK
0.20 JK
0.81 JQK
21
<5.0
<2.5
<5.0
27
290
HR2A05
HR2A05-01
Front
0.81 JQK
4.1
130 JK
<0.94
0.98
21
9.1
38
150
0.17 JK
0.90 JQK
27
<4.7
<2.3
<4.7
41 JK
320
HR2A05
HR2A05-02
Front
0.66 JQK
3.8
130 JK
<0.92
0.66 JQK
23
9.7
33
150
0.12 JK
0.45 JQK
17
<4.6
<2.3
<4.6
47 JK
200
HR2A05
HR2A05-02(D|
Front
0.76 JQK
2.5 JQK
120
0.38 JQK
1.1
20
7.2
31
160 JK
0.12 JK
0.51 JQK
16
<4.6
<2.3
0.47 JQK
35
200
HR2A05
HR2A05-03
Rear
2.1 JQK
4.9
260 JK
<0.97
1.8
22
7.7
64
410
0.19 JK
0.76 JQK
23
<4.9
0.85 JQK
<4.9
36 JK
770
HR2A06
HR2A06-01
Front
0.40 JQK
2.7 JK
120
<0.79
1.1 JK
17
6.8
27
160
0.27 JK
0.53 JQK
14
<4.0
<2.0
0.69 JQK
30
230
HR2A06
HR2A06-02
Front
0.46 JQK
2.3 JQK
92
<0.83
0.87 JK
15
6.5
26
120
0.30 JK
0.53 JQK
13
<4.2
<2.1
0.84 JQK
28
180
HR2A06
HR2A06-03
Rear
1.5 JQK
4.2 JK
210
<0.63
2.7 JK
22
7.4
34
300
1.8 JK
0.68 JQK
24
<3.1
<1.6
0.84 JQK
32
520
HR2A07
HR2A07-01
Front
<3.6
19 JQK
85 JK
<1.2
0.45 JQK
16
7.2
16
49
0.12 JK
0.33 JQK
11
<6.0
<3.0
<6.0
30 JK
110
HR2A07
HR2A07-02
Front
<3.0
2.7 JQK
110 JK
<1.0
0.61 JQK
16
8.2
21
48
0.25 JK
0.40 JQK
12
<5.1
<2.5
<5.1
33 JK
160
HR2A07
HR2A07-03
Rear
1.9 JQK
8.7
250 JK
<1.1
1.6
33
11
320
360
0.38 JK
13 JQK
23
<5.5
<2.7
<5.5
42 JK
800
HR2B01
HR2B01-01
Front
1.1 JQK
2.5 JQK
120 JK
0.26 JQK
0.76 JQK
17
5.4
33
110
0.11 JK
0.68 JQK
12
<4.4
<2.2
0.66 JQK
27 JK
250
HR2B01
HR2B01-02
Rear
2.2 JQK
2.7 JQK
120 JK
0.33 JQK
0.82 JQK
16
6.6
22
190
0.17 JK
0.22 JQK
13
<4.9
<2.5
<4.9
33 JK
170
HR2B01
HR2B01-03
Rear
0.67 JQK
3.1
160 JK
0.32 JQK
0.96 JQK
20
6.5
42
190
0.16 JK
0.48 JQK
19
<4.9
<2.5
<4.9
33 JK
330
HR2B02
HR2B02-01
Front
0.79 JQK
3.1
110
<0.93
0.63 JQK
16
6.8
28
140
0.25
0.66 JQK
14
<4.6
<2.3
<4.6
27
220
HR2B02
HR2B02-02
Rear
1.9 JQK
2.9 JQK
170
<1.0
0.66 JQK
17
6.6
41
160
0.21
0.77 JQK
14
<5.0
<2.5
<5.0
24
350
HR2B02
HR2B02-03
Rear
0.80 JQK
3.3
110
<1.0
0.33 JQK
11
5.8
18
92
0.14
0.29 JQK
8.3
<5.2
<2.6
<5.2
22
190
T-10 (2 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
HR2B03
HR2B03-01
Front
0.80 JQK
4.4
110 JK
<0.88
1.0
20
8.0
28
140
0.22 JK
0.56 JQK
15 JK
<4.4
<2.2
1 o JQK
34
240
HR2B03
HR2B03-02
Rear
0.63 JQK
2 4 jqk
130 JK
<0.83
0.91
18
8.3
29
150
0.31 JK
0.47 JQK
13 JK
<4.1
<2.1
0.63 JQK
36
260
HR2B03
HR2B03-03
Rear
-| -| JQK
3.8
170 JK
<0.88
1.2
25
9.0
44
200
0.35 JK
0.97 JQK
22 JK
<4.4
0.66 JQK
0.45 JQK
37
310
HR2B04
HR2B04-01
Front
1.1 JQK
5.3
130
<0.89
0.51 JQK
22
8.5
32
180
0.25
1.1 JQK
16
<4.4
<2.2
<4.4
37
270
RZ-2b
HR2B04
HR2B04-02
Rear
0.66 JQK
4.9
150
<0.95
0.80 JQK
20
7.9
38
160
0.15
0.46 JQK
17
<4.8
<2.4
<4.8
37
310
HR2B04
HR2B04-03
Rear
0.73 JQK
5.1
230
<0.92
0.82 JQK
31
7.8
49
210
0.23
1.4 JQK
19
<4.6
<2.3
<4.6
30
360
HR2B05
HR2B05-01
Front
0.83 JQK
3.0
120
<0.94
1.0
27
8.0
34
130
0.25 JK
0.87 JQK
14
<4.7
<2.4
<4.7
36
210
HR2B05
HR2B05-02
Rear
0.45 JQK
3.3
130
<0.90
1.0
26
8.1
34
150
0.23 JK
0.60 JQK
16
<4.5
<2.2
<4.5
38
270
HR2B05
HR2B05-03
Rear
0.79 JQK
3.6
150
<0.91
1.5
26
7.5
37
240
0.31 JK
0.68 JQK
17
<4.6
0.52 JQK
<4.6
35
370
HR2B06
HR2B06-01
Rear
12 JQK
2.8 JK
240
<0.88
1.4 JK
27
9.5
45
250
0.49 JK
0.62 JQK
17
<4.4
<2.2
10 JQK
35
370
HR2B06
HR2B06-02
Rear
1.1 JQK
3.0 JK
190
<0.71
1.7 JK
26
8.3
42
240
0.55 JK
0.62 JQK
17
<3.6
<1.8
10 JQK
31
380
HR2B06
HR2B06-03
Front
0.63 JQK
3.1 JK
110
<0.73
1.2 JK
21
7.2
25
76
0.43 JK
0.45 JQK
14
<3.6
0.53 JQK
0.66 JQK
30
190
HR2B07
HR2B07-01
Front
0.37 JQK
2.5 JK
100
<0.68
0.59 JQK
18
6.4
30
69
0.14 JK
0.54 JQK
15
<3.4
0.69 JQK
1.3 JQK
25
130
HR2B07
HR2B07-02
Front
0.52 JQK
2.8 JK
120
<0.89
0.86 JQK
20
6.1
44
75
0.25 JK
0.77 JQK
14
<4.4
0.92 JQK
H JQK
24
180
HR2B07
HR2B07-03
Rear
4.0
6.5 JK
140
<0.59
1.2 JK
20
6.9
47
380
0.15 JK
0.78 JQK
13
<2.9
0.38 JQK
1 2 JQK
26
310
HR2C01
HR2C01-01
Front
0.33 JQK
3.9
110 JK
<1.1
0.55 JQK
21
8.1
33
84
0.24 JK
0.47 JQK
19
<5.6
<2.8
<5.6
33 JK
180
HR2C01
HR2C01-02
Rear
1.2 JQK
12
210 JK
<0.90
1.1
29
11
57
180
0.27 JK
0.67 JQK
18
<4.5
0.80 JQK
<4.5
42 JK
350
HR2C01
HR2C01-03
Rear
1.0 JQK
16
170 JK
<1.0
1.3
28
10
47
150
0.27 JK
0.59 JQK
25
<5.0
H JQK
<5.0
39 JK
290
HR2C02
HR2C02-01
Front
0.62 JQK
9.6
130
<1.0
0.99 JQK
17
7.9
35
250
0.15 JK
0.79 JQK
14
<5.2
<2.6
<5.2
29
220
HR2C02
HR2C02-02
Front
0.64 JQK
9.5
150
<1.0
0.62 JQK
17
8.5
32
190
0.21 JK
0.73 JQK
15
<5.2
<2.6
<5.2
31
260
HR2C02
HR2C02-03
Front
0.65 JQK
4.2
120
<1.1
0.63 JQK
16
7.3
31
140
0.27 JK
0.72 JQK
14
<5.3
<2.6
<5.3
29
190
HR2C03
HR2C03-01
Front
0.54 JQK
3.3
110 JK
0.37 JQK
0.78 JQK
19
7.2
32
120
0.12 JK
0.68 JQK
18
<5.0
<2.5
<5.0
35 JK
190
HR2C03
HR2C03-02
Rear
0.56 JQK
3.5
110 JK
0.33 JQK
0.73 JQK
18
6.6
26
89
0.12 JK
0.49 JQK
12
<4.5
<2.2
<4.5
32 JK
160
HR2C03
HR2C03-03
Rear
0.73 JQK
3.1
140 JK
0.41 JQK
0.96 JQK
20
7.8
34
130
0.081 JK
0.71 JQK
14
<5.0
<2.5
19 JQK
35 JK
240
HR2C04
HR2C04-01
Front
0.76 JQK
2.5 JQK
100 JK
<0.94
0.57 JQK
17
6.7
38
74
0.16 JK
0.59 JQK
11
<4.7
0.64 JQK
<4.7
28 JK
170
HR2C04
HR2C04-01(D|
Front
0.45 JQK
2.3 JQK
110
0.30 JQK
0.96
17
5.8
39
85 JK
0.18 JK
0.68 JQK
12
<4.7
0.53 JQK
1 2 JQK
25
180
RZ-2c
HR2C04
HR2C04-02
Rear
0.81 JQK
3.8
140 JK
<0.93
0.92 JQK
20
7.4
41
130
0.27 JK
0.61 JQK
14
<4.6
<2.3
<4.6
31 JK
260
HR2C04
HR2C04-03
Rear
0.96 JQK
3.1
140
<0.79
1.5
21
7.4
44
130
0.14 JK
0.82 JQK
18
<3.9
0.60 JQK
-| g JQK
30 JK
260
HR2C05
HR2C05-01
Front
10 JQK
13
110 JK
<1.2
1.7
28
8.5
45
130
0.22 JK
0.46 JQK
16
<5.9
<3.0
<5.9
40 JK
180
HR2C05
HR2C05-02
Rear
0.77 JQK
23
120 JK
<1.2
2.0
21
8.1
40
120
0.40 JK
0.47 JQK
13
<6.1
<3.0
<6.1
37 JK
290
HR2C05
HR2C05-03
Rear
0.61 JQK
3.4
110 JK
<0.93
0.98
23
8.3
34 JK
120 JK
0.16
0.43 JQK
13
<4.6
<2.3
<4.6
40 JK
230
HR2C05
HR2C05-03(D)
Rear
0.65 JQK
3.3
110
<0.99
0.91 JQK
23
8.0
32
110
0.14
0.41 JQK
13
<5.0
<2.5
<5.0
38
220
HR2C06
HR2C06-01
Front
0.64 JQK
2.6 JQK
120 JK
<1.1
1.1
22
8.1
43 JK
120
0.26 JK
1.3 JQK
26
<5.3
<2.6
1.3 JQK
35 JK
220
HR2C06
HR2C06-02
Rear
•1 2 JQK
7.1
350 JK
<1.0
3.1
34
9.6
68 JK
550
0.19 JK
1 2 JQK
25
<5.2
0.61 JQK
-| -| JQK
39 JK
680
HR2C06
HR2C06-03
Rear
-| -| JQK
6.0
300 JK
<0.91
2.1
31
11
55 JK
430
0.15 JK
0.91 JQK
17
<4.6
0.64 JQK
-| -| JQK
44 jk
500
HR2C07
HR2C07-01
Front
0.76 JQK
9.1
140 JK
<1.1
1.6
33
9.4
42 JK
230 JK
0.23
0.72 JQK
20
<5.6
<2.8
<5.6
36 JK
250
HR2C07
HR2C07-02
Rear
0.56 JQK
9.0
150 JK
<1.0
1.2
29
9.1
39 JK
160 JK
0.26
0.58 JQK
15
<5.0
0.58 JQK
<5.0
35 JK
240
HR2C07
HR2C07-03
Rear
0.52 JQK
7.5
130 JK
<0.97
1.2
29
9.7
41 JK
98 JK
0.28
0.54 JQK
14
<4.8
<2.4
<4.8
37 JK
210
HR3A01
HR3A01-01
Side
•1 0 JQK
4.9 JK
130
<0.53
1.9 JK
20
9.5
34
84
0.11 JK
0.47 JQK
29
<2.7
<1.3
<2.7
39
290
HR3A01
HR3A01-02
Rear
0.61 JQK
6.1 JK
110 JK
<0.95
1.3
22 JK
9.1 JK
28 JK
90
0.078 JK
0.47 JQK
16 JK
0.48 JQK
<2.4
1 2 JQK
39 JK
330
HR3A01
HR3A01-03
Front
0.83 JQK
6.2 JK
110 JK
<1.0
1.2
22 JK
9.5 JK
33 JK
93
0.12 Jh
0.81 JQK
17 JK
0.71 JQK
<2.5
12 JQK
40 JK
340
HR3A02
HR3A02-01
Rear
0.95 JQK
7.9 JK
180 JK
<1.0
1.2
24 JK
9.1 JK
41 JK
290
0.21 Jh
0.86 JQK
17 JK
0.53 JQK
<2.5
1.5 JQI
39 JK
280
HR3A02
HR3A02-02
Side
0.79 JQK
H JK
140 JK
<0.96
1.7
24 JK
9.0 JK
40 JK
310
0.23 Jh
0.73 JQK
50 JK
0.54 JQK
0.54 JQK
16 JQK
39 JK
300
HR3A02
HR3A02-03
Front
0.58 JQK
4.8 JK
140 JK
<1.1
0.97 JQK
23 JK
8.7 JK
37 JK
150
0.28 Jh
0.83 JQK
22 JK
0.55 JQK
10 JQK
1.3 JQI
38 JK
250
HR3A03
HR3A03-01
Front
10 JQK
3.2 JK
150 JK
<1.1
0.80 JQK
19 JK
8.1 JK
38 JK
110
0.21 Jh
0.70 JQK
15 JK
<5.4
<2.7
0.89 JQK
37 JK
180
RZ-3a
HR3A03
HR3A03-02
Rear
H JQK
4.5 JK
220 JK
<0.91
1.1
46 JK
8.5 JK
47 JK
530
0.61 Jh
4.1
23 JK
0.89 JQK
1.2 JQK
14 JQK
36 JK
340
HR3A03
HR3A03-03
Rear
13 JQK
4.9 JK
280 JK
<0.90
1.1
19 JK
8.1 JK
40 JK
720
0.33 Jh
0.48 JQK
32 JK
12 JQK
0.89 JQK
13 JQK
37 JK
440
HR3A04
HR3A04-01
Rear
0.53 JQK
4.6 JK
110 JK
<0.97
0.65 JQK
16 JK
6.6 JK
27 JK
96
0.27 Jh
0.62 JQI
17 JK
<4.8
0.54 JQK
<4.8
37 JK
190
HR3A04
HR3A04-02
Rear
0.74 JQK
4.2 JK
100 JK
<0.94
0.63 JQK
17 JK
7.2 JK
29 JK
130
1.3 Jh
0.44 JQK
20 JK
0.61 JQK
<2.3
0.47 JQK
39 JK
180
HR3A04
HR3A04-03
Front
0.73 JQK
3.4 JK
120 JK
<0.95
0.68 JQK
17 JK
6.6 JK
35 JK
110
0.41 Jh
0.57 JQK
20 JK
0.71 JQK
<2.4
10 JQK
31 JK
200
HR3A05
HR3A05-01
Rear
12 JQK
5.0 JK
220 JK
<0.93
0.88 JQK
18 JK
7.4 JK
32 JK
140
0.21 Jh
0.45 JQK
12 JK
<4.7
<2.3
0.60 JQK
37 JK
340
HR3A05
HR3A05-02
Front
0.95 JQK
4.0 JK
130 JK
<1.0
0.78 JQK
19 JK
8.2 JK
31 JK
140
0.26 JK
0.64 JQK
20 JK
0.47 JQK
<2.6
0.65 JQK
40 JK
210
HR3A05
HR3A05-03
Front
0.39 JQK
2.3 JQK
96 JK
<0.92
0.45 JQK
14 JK
6.4 JK
21 JK
78
0.34 JK
0.34 JQK
-| -| JK
0.37 JQK
<2.3
0.77 JQK
32 JK
140
1-10(3 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
HR3B01
HR3B01-01
Front
0.54 JQK
2.5
140 JK
<0.81
0.76 JQK
19
8.8
26 JK
95
0.099 JK
0.48 JQK
19
<4.1
<2.0
0.57 JQK
40 JK
160
HR3B01
HR3B01-02
Rear
1.1 JQK
7.3
280 JK
<0.77
1.9
28
10
57 JK
290
0.31 JK
0.73 JQK
16
<3.9
0.65 JQK
<3.9
48 JK
320
HR3B01
HR3B01-03
Rear
1.9
4.9
190 JK
<0.64
1.3
25
8.2
55 JK
200
0.19 JK
0.72 JQK
15
<3.2
0.57 JQK
0.45 JQK
41 JK
260
HR3B02
HR3B02-01
Front
0.54 JQK
3.0
110 JK
<0.91
0.75 JQK
21
11
27 JK
110
0.080 JK
0.65 JQK
17
<4.5
<2.3
0.92 JQK
48 JK
150
HR3B02
HR3B02-01(D|
Front
0.92 JQK
3.6
110
<0.98
0.33 JQK
20
10
26
98
0.17
0.93 JQK
16
<4.9
<2.5
<4.9
45
140
HR3B02
HR3B02-02
Rear
-J g JQK
2.7
240 JK
<0.92
1.2
20
8.5
31 JK
150
0.15 JK
0.49 JQK
13
<4.6
<2.3
-J -J JQK
36 JK
340
HR3B02
HR3B02-03
Rear
-| 2 JQK
3.5
260 JK
<1.0
1.2
21
8.9
37 JK
180
0.10 JK
0.61 JQK
16
<5.2
<2.6
-| -| JQK
38 JK
310
HR3B03
HR3B03-01
Front
0.56 JQK
2.9 JQK
110
<1.2
0.63 JQK
17
8.7
24
64
0.13 JK
0.60 JQK
13
<6.0
<3.0
1.4 JQK
38 JK
130
HR3B03
HR3B03-02
Rear
0.59 JQK
2.9
120
<0.85
0.89
21
10
27
84
0.13 JK
0.50 JQK
45
<4.2
<2.1
0.74 JQK
42 JK
150
HR3B03
HR3B03-03
Rear
0.92 JQK
3.0
170
<0.93
1.5
21
9.3
41
160
0.24 JK
0.73 JQK
16
<4.7
<2.3
1.7 JQK
38 JK
280
HR3B04
HR3B04-01
Front
0.69 JQK
3.2 JQK
140
<1.1
0.99 JQK
21
9.6
30
100
0.23 JK
0.53 JQK
21
<5.5
<2.8
1 4 JQK
39 JK
190
HR3B04
HR3B04-02
Rear
1 2 JQK
5.0
160
<1.0
1.2
22
9.0
39
140
0.30 JK
0.63 JQK
15
<5.2
<2.6
1 2 JQK
38 JK
250
RZ-3b
HR3B04
HR3B04-03
Rear
0.85 JQK
4.0
190
<1.1
1.1
23
9.2
33
120
0.16 JK
0.65 JQK
20
<5.7
<2.8
0.90 JQK
39 JK
260
HR3B05
HR3B05-01
Front
0.80 JQK
3.1
140
<0.88
0.88
22
8.8
34
130
0.33 JK
0.58 JQK
20
<4.4
0.51 JQK
1.3 JQK
40 JK
290
HR3B05
HR3B05-02
Rear
1.5 JQK
5.5
310
<0.90
1.8
26
9.5
48
850
0.23 JK
0.80 JQK
19
<4.5
0.82 JQK
1.7 JQK
41 JK
630
HR3B05
HR3B05-03
Rear
1.0 JQK
3.3
210
<0.90
1.1
24
9.8
40
330
0.22 JK
0.67 JQK
15
<4.5
0.70 JQK
2.7 JQK
40 JK
440
HR3B06
HR3B06-01
Front
0.36 JQK
2.2
110 JK
<0.64
0.80
19
8.1
26 JK
95
0.11 JK
0.37 JQK
14
<3.2
<1.6
0.72 JQK
37 JK
150
HR3B06
HR3B06-01(D|
Front
0.67 JQK
2.3
100
<0.73
0.74
18
7.7
25
86
0.16 JK
0.32 JQK
13
<3.7
<1.8
1 -J JQK
34 JK
140
HR3B06
HR3B06-02
Rear
-| -| JQK
2.8 JQK
200 JK
<0.97
1.4
19
8.6
35 JK
270
0.15 JK
0.63 JQK
24
<4.9
0.63 JQK
0.70 JQK
36 JK
400
HR3B06
HR3B06-03
Rear
1 0 JQK
2.1
150 JK
<0.62
1.2
16
7.6
32 JK
180
0.19 JK
0.43 JQK
14
<3.1
<1.5
0.73 JQK
33 JK
290
HR3B07
HR3B07-01
Front
0.82 JQK
5.5
100 JK
<1.1
0.98 JQK
23
7.9
32 JK
92 JK
0.17
0.40 JQK
23
<5.3
<2.6
<5.3
34 JK
150
HR3B07
HR3B07-02
Rear
12 JQK
4.9
180 JK
<0.99
1.8
22
8.5
45 JK
200 JK
0.27
0.92 JQK
18
<5.0
0.61 JQK
<5.0
33 JK
380
HR3B07
HR3B07-03
Front
15 JQK
3.5 JQK
260 JK
<1.2
1.-1 JQK
24
8.1
36 JK
210 JK
0.15
0.54 JQK
14
<6.2
<3.1
<6.2
33 JK
280
HR3B08
HR3B08-01
Front
0.67 JQK
5.2
150 JK
0.34 JQK
2.5
100
7.0
46
160
0.31 JK
0.83 JQK
20
<5.3
<2.6
-J -J JQK
34 JK
280
HR3B08
HR3B08-02
Rear
0.64 JQK
6.3
190 JK
0.40 JQK
1.6
45
6.9
41
280
0.31 JK
0.53 JQK
15
<5.1
<2.6
<5.1
34 JK
290
HR3B08
HR3B08-03
Rear
0.88 JQK
8.5
240 JK
0.35 JQK
2.0
46
7.1
51
370
0.21 JK
0.43 JQK
18
<5.0
<2.5
0.68 JQK
34 JK
430
HR3C01
HR3C01-01
Front
0.95 JQK
3.0
130 JK
<0.78
0.59 JQK
24
10
34 JK
130 JK
0.18
0.87 JQK
28 JK
<3.9
<2.0
<3.9
39 JK
160
HR3C01
HR3C01-02
Rear
1 A JQK
3.9
130 JK
<0.74
1.1
24
9.4
46 JK
160 JK
0.35
0.92 JQK
18 JK
<3.7
<1.9
<3.7
39 JK
260
HR3C01
HR3C01-03
Rear
16 JQK
2.2
110 JK
<0.57
1.7
18
9.3
33 JK
83 JK
0.12
0.46 JQK
13 JK
<2.9
<1.4
<2.9
37 JK
180
HR3C01
HR3C01-03(D)
Rear
0.68 JQK
2.6 JQK
130 JK
<1.0
0.35 JQK
19
9.5 JK
36 JK
97 JK
0.10 JK
0.56 JQK
15 JK
<5.0
<2.5
<5.0
36 JK
200 JK
HR3C02
HR3C02-01
Front
0.63 JQK
4.2
96
<0.94
0.87 JQK
17
8.1
25
72
0.12 JK
0.41 JQK
17
<4.7
<2.3
1.2 JQK
38 JK
200
HR3C02
HR3C02-01(D|
Front
0.69 JQK
3.8
94
0.31 JQK
0.85 JQK
16
6.1
26
78 JK
0.10 JK
0.48 JQK
24
<5.4
<2.7
<5.4
32
200
HR3C02
HR3C02-02
Rear
0.69 JQK
2.5 JQK
120
<0.99
0.98 JQK
24
10
34
110
0.29 JK
0.52 JQK
22
<4.9
<2.5
10 JQK
44 JK
210
HR3C02
HR3C02-03
Rear
1.1 JQK
5.1
130
<0.93
1.4
25
9.5
34
180
0.19 JK
0.55 JQK
14
<4.6
<2.3
14 JQK
40 JK
290
HR3C03
HR3C03-01
Front
1 A JQK
2.5 JQK
120 JK
0.33 JQK
0.62 JQK
35
6.3
24
88
0.11 JK
0.40 JQK
13
<5.2
<2.6
0.72 JQK
31 JK
160
HR3C03
HR3C03-02
Rear
5.1
4.7
210 JK
0.34 JQK
0.57 JQK
53
6.7
43
280
0.42 JK
1.0 JQK
20
<4.9
<2.5
1.2 JQK
34 JK
210
HR3C03
HR3C03-03
Rear
1 q JQK
4.1
150 JK
0.38 JQK
1.9
20
7.7
37
110
0.14 JK
0.52 JQK
15
<4.4
<2.2
0.84 JQK
32 JK
460
HR3C03
HR3C03-03|D)
Rear
0.92 JQK
3.8
150
0.43 JQK
2.1
21
7.9
38
110 JK
0.19 JK
0.62 JQK
16
<4.8
<2.4
1.5 JQK
34
460
RZ-3c
HR3C04
HR3C04-01
Front
0.80 JQK
2.5 JQK
110
0.32 JQK
1.3
21
6.0
30
97 JK
0.13 JK
0.54 JQK
16
<4.6
<2.3
0.89 JQK
29
160
HR3C04
HR3C04-02
Rear
0.76 JQK
8.7
140
0.40 JQK
1.1
19
7.3
33
120 JK
0.096 JK
0.81 JQK
16
<4.8
<2.4
0.81 JQK
33
240
HR3C04
HR3C04-03
Rear
0.76 JQK
3.5
120
0.32 JQK
1.5
18
6.2
29
110 JK
0.14 JK
0.72 JQK
17
<4.8
<2.4
0.57 JQK
29
210
HR3C05
HR3C05-01
Front
0.80 JQK
3.2
150 JK
<1.0
0.84 JQK
22
9.1
34 JK
170
0.18
0.66 JQK
15
<5.0
<2.5
<5.0
35 JK
250
HR3C05
HR3C05-02
Rear
0.57 JQK
2.7 JQK
200 JK
<1.1
1.2
21
7.8
30 JK
330
1.2
0.72 JQK
13
<5.3
<2.6
<5.3
29 JK
360
HR3C05
HR3C05-03
Rear
0.85 JQK
2.5 JQK
140 JK
<1.0
0.77 JQK
19
8.5
27 JK
140
0.20
0.51 JQK
14
<5.0
<2.5
<5.0
32 JK
200
HR3C05
HR3C05-03(D|
Rear
0.70 JQK
2.3 JQK
130
<1.1
0.71 JQK
19
9.0
28
140
0.20
0.58 JQK
19
<5.4
<2.7
<5.4
31
200
HR3C07
HR3C07-01
Front
0.36 JQK
2.6
97 JK
<0.69
0.70
18
8.5
27 JK
44
0.093 JK
0.62 JQK
17
<3.5
<1.7
12 JQK
35 JK
110
HR3C07
HR3C07-02
Front
0.48 JQK
3.1
110 JK
<0.67
0.78
20
9.5
30 JK
44
0.13 JK
0.77 JQK
16
<3.3
<1.7
1.3 JQK
41 JK
110
HR3C07
HR3C07-03
Front
0.32 JQK
2.9
94 JK
<0.67
0.69
17
8.3
26 JK
44
0.088 JK
0.50 JQK
23
<3.3
<1.7
12 JQK
35 JK
100
HR3C08
HR3C08-01
Front
0.71 JQK
2.9
130
<0.71
1.1
22
9.2
35
98
0.20 JK
0.82 JQK
16
<3.6
<1.8
1.4 JQK
37 JK
200
HR3C08
HR3C08-02
Front
0.94 JQK
2.9
120
<0.85
1.3
22
9.5
35
130
0.16 JK
0.83 JQK
17
<4.3
<2.1
1.9 JQK
38 JK
230
HR3C08
HR3C08-03
Rear
1.5 JQK
4.4
330
<0.74
2.1
21
8.2
58
310
0.37 JK
0.96 JQK
16
<3.7
0.54 JQK
2.1 JQK
33 JK
470
T-10 (4 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
RZ-4a
HR4A01
HR4A01-01
Front
0.49 JQK
2.0 JQK
92
<1.1
0.29 JQK
12
5.8
25
59
0.079 JK
0.35 JQK
10
<5.3
<2.6
<5.3
24
160
HR4A01
HR4A01-02
Rear
4.5 JK
2 Q JQK
120
<1.0
0.69 JQK
13
5.4
33
120
0.091 JK
0.84 JQK
11
<5.1
<2.5
<5.1
22
270
HR4A01
HR4A01-03
Rear
0.99 JQK
-| J JQK
120
<1.0
0.49 JQK
11
4.3
37
120
0.057 JK
0.74 JQK
8.5
<5.2
<2.6
<5.2
19
210
HR4A02
HR4A02-01
Front
1.0 JQK
3.5
150
<0.96
0.19 JQK
22
11
27
76 JK
0.056 JK
0.80 JQK
25 JK
<4.8
<2.4
<4.8
42
170
HR4A02
HR4A02-02
Front
1.1 JQK
3.3
120
<0.99
0.40 JQK
18
7.9
24
92 JK
0.055 JK
0.71 JQK
17 JK
<5.0
<2.5
<5.0
32
210
HR4A02
HR4A02-02|D)
Front
1.0 JQK
3.1
130
<0.91
0.42 JQK
18
8.1
23
90 JK
0.053 JK
0.46 JQK
15 JK
<4.5
<2.3
<4.5
32
210
HR4A02
HR4A02-03
Front
1.3 JQK
3.9
120
<0.93
0.24 JQK
19
9.1
22
97 JK
0.043 JK
0.42 JQK
14 JK
<4.6
<2.3
<4.6
37
200
HR4A03
HR4A03-01
Front
0.42 JQK
4.4
130 JK
<1.0
0.72 JQK
18
6.1
30
72
0.093 JH
0.83 JQK
14
<5.2
<2.6
<5.2
28
180
HR4A03
HR4A03-02
Front
0.89 JQK
5.8
140 JK
<0.99
0.69 JQK
17
6.3
26
95
0.16 JH
0.56 JQK
13
<5.0
<2.5
<5.0
29
190
HR4A03
HR4A03-03
Rear
3.4
3.9
190 JK
<1.0
1.7 JK
22
7.0
50
280
0.10 JH
0.73 JQK
19
<5.0
<2.5
<5.0
36
430
HR4A04
HR4A04-01
Front
0.51 JQK
7.4
100 JK
<0.96
0.53 JQK
26
8.1
29
38
0.093 JH
1.6 JQK
23
<4.8
<2.4
<4.8
44
130
HR4A04
HR4A04-02
Rear
1.6 JQK
7.7
150 JK
<1.0
0.53 JQK
29
12
470
180
0.14 JH
0.86 JQK
20
<5.0
3.3
<5.0
51
310
HR4A04
HR4A04-03
Rear
0.92 JQK
8.1
150 JK
<0.94
0.75 JQK
30
14
40
100
0.17 JH
1.3 JQK
33
<4.7
<2.4
<4.7
51
180
HR4A06
HR4A06-01
Front
0.50 JQK
4.5
110 JK
<0.71
0.74
18
8.9
32 JK
95 JK
0.072
0.72 JQK
19 JK
<3.6
<1.8
<3.6
35 JK
220
HR4A06
HR4A06-01(D|
Front
0.28 JQK
5.1 JK
120 JK
<1.0
0.51 JQK
18
8.5 JK
29 JK
86 JK
0.096 JK
0.62 JQK
15 JK
<5.1
<2.5
<5.1
33 JK
220 JK
HR4A06
HR4A06-02
Front
-j Q JQK
7.2
110 JK
<0.70
0.95
19
9.2
32 JK
110 JK
0.084
0.74 JQK
22 JK
<3.5
<1.7
<3.5
35 JK
220
HR4A06
HR4A06-03
Rear
-| -| JQK
4.1
150 JK
<0.58
1.4
20
8.5
44 jk
140 JK
0.19
0.77 JQK
20 JK
<2.9
<1.4
<2.9
34 JK
320
HR4A07
HR4A07-01
Front
0.59 JQK
2.5 JQK
120
<1.1
0.66 JQK
19
6.1
27
110 JK
0.16 JK
0.43 JQK
H JK
<5.7
<2.9
<5.7
28
180
HR4A07
HR4A07-02
Front
0.58 JQK
2.1 JQK
120
<1.1
1.2
21
5.8
23
130 JK
0.20 JK
0.28 JQK
10 JK
<5.5
0.94 JQK
<5.5
26
180
HR4A07
HR4A07-03
Front
0.54 JQK
2.5 JQK
140
<1.2
0.99 JQK
30
7.4
30
140 JK
0.13 JK
2.0 JQK
19 JK
<5.8
1.0 JQK
<5.8
33
190
HR4A08
HR4A08-01
Front
0.40 JQK
6.5
120
<0.94
0.61 JQK
15
8.1
30
140
0.088 JK
0.71 JQK
16
<4.7
<2.4
<4.7
28
430
HR4A08
HR4A08-01(D|
Front
0.54 JQK
6.4
130
<1.0
0.65 JQK
16
8.3
32
130
0.11 JK
0.81 JQK
17
<5.1
<2.6
<5.1
29
430
HR4A08
HR4A08-02
Front
0.72 JQK
4.0
140
<1.0
0.46 JQK
20
7.8
28
140
0.092 JK
0.56 JQK
15
<5.1
<2.6
<5.1
26
220
HR4A08
HR4A08-03
Front
0.62 JQK
3.6
120
<0.90
0.42 JQK
14
7.1
31
130
0.10 JK
0.66 JQK
22
<4.5
<2.3
<4.5
26
200
RZ-4b
HR4B01
HR4B01-01
Front
0.80 JQK
4.1
160
<1.2
0.61 JQK
22
10
37
140 JK
0.13 JK
0.78 JQK
19 JK
<6.0
<3.0
<6.0
38
230
HR4B01
HR4B01-02
Side
1.3 JQK
5.6
190
<0.98
1.0
24
12
44
160 JK
0.11 JK
1.3 JQK
21 JK
<4.9
<2.4
<4.9
44
440
HR4B01
HR4B01-03
Side
1.4 JQK
4.6
180
<1.0
0.85 JQK
23
10
48
150 JK
0.15 JK
1.4 JQK
22 JK
<5.0
<2.5
<5.0
39
340
HR4B02
HR4B02-01
Front
0.80 JQK
3.6
150
<1.0
0.69 JQK
20
7.0
39
140 JK
0.19 JK
0.86 JQK
17 JK
<5.2
0.79 JQK
<5.2
28
260
HR4B02
HR4B02-01(D|
Front
1.1 JQK
4.3
170
<0.99
0.86 JQK
20
7.8
44
170 JK
0.21 JK
0.81 JQK
19 JK
<5.0
0.59 JQK
<5.0
30
290
HR4B02
HR4B02-02
Rear
-j g JQK
3.4
350
<0.97
1.0
21
8.2
49
320 JK
0.16 JK
0.83 JQK
16 JK
<4.9
<2.4
<4.9
31
440
HR4B02
HR4B02-03
Rear
2 y JQK
3.5
380
<0.97
1.7
23
8.9
54
560 JK
0.16 JK
0.99 JQK
17 JK
<4.8
<2.4
<4.8
33
660
HR4B03
HR4B03-01
Front
0.93 JQK
4.4
120 JK
<1.1
2.8 JK
20
9.6
28
73
0.11 JH
0.66 JQK
18
<5.5
<2.8
<5.5
36
260
HR4B03
HR4B03-02
Rear
25
6.1
140 JK
<0.96
1.1 JK
20
9.8
33
960
0.15 JH
0.54 JQK
20
<4.8
<2.4
<4.8
37
280
HR4B03
HR4B03-03
Front
0.92 JQK
4.8
150 JK
<0.98
0.70 JQK
25
11
33
74
0.14 JH
0.81 JQK
19
<4.9
<2.4
<4.9
41
190
HR4B04
HR4B04-01
Front
1.8 JQK
4.1
180 JK
<0.96
1.5
24
11
59 JK
160 JK
0.14
1.3 JQK
28 JK
<4.8
<2.4
<4.8
39 JK
410
HR4B04
HR4B04-02
Rear
5.5
6.2
300 JK
<0.59
2.3
35
13
93 JK
300 JK
0.20
3.1
30 JK
<3.0
0.73 JQK
<3.0
43 JK
570
HR4B04
HR4B04-03
Rear
4.6
5.3
310 JK
<0.93
2.3
38
13
77 JK
290 JK
0.22
1 2 JQK
25 JK
<4.6
<2.3
<4.6
48 JK
570
HR4B04
HR4B04-03(D|
Rear
4.5 JK
4.7 JK
320 JK
<1.1
1.8
30
13 JK
69 JK
250 JK
0.21 JK
-j 2 JQK
24 JK
<5.4
<2.7
<5.4
46 JK
570 JK
HR4B05
HR4B05-01
Front
0.49 JQK
3.9
130 JK
<1.0
0.63 JQK
21
11
35 JK
59 JK
0.10
1.1 JQK
21 JK
<5.1
<2.6
<5.1
44 jk
240
HR4B05
HR4B05-02
Rear
2.5
5.1
210 JK
<0.66
2.2
32
11
87 JK
140 JK
0.13
1.0 JQK
29 JK
<3.3
<1.7
<3.3
42 J*
340
HR4B05
HR4B05-03
Rear
2.1 JQK
6.4
390 JK
<0.99
0.96 JQK
25
9.6
190 JK
300 JK
0.23
1.6 JQK
23 JK
<5.0
<2.5
<5.0
36 JK
660
HR4B06
HR4B06-01
Front
0.87 JQK
3.6
130
<1.0
0.49 JQK
16
7.1
28
98 JK
0.10 JK
0.41 JQK
-J -J JK
<5.1
<2.6
<5.1
29
170
HR4B06
HR4B06-01(D|
Front
0.30 JQK
3.2
110
<1.1
0.57 JQK
14
6.9
26
87
0.11 JK
0.40 JQK
12
<5.3
<2.7
<5.3
26
160
HR4B06
HR4B06-02
Rear
0.88 JQK
4.4
180
<0.89
1.2
19
8.6
57
130 JK
0.092 JK
0.84 JQK
15 JK
<4.5
<2.2
<4.5
34
230
HR4B06
HR4B06-03
Rear
0.27 JQK
3.6
1.300
<0.95
1.3
23
11
49
65 JK
0.15 JK
0.86 JQK
18 JK
<4.8
<2.4
<4.8
42
190
HR4C01
HR4C01-01
Front
1.3 JQK
6.3
350 JK
<0.92
1.0
33
12
59 JK
210
0.17
1.4 JQK
37
<4.6
<2.3
<4.6
46 JK
320
HR4C01
HR4C01-02
Rear
1.2 JQK
4.7
230 JK
<0.98
0.48 JQK
27
13
200 JK
150
0.33
0.61 JQK
26
<4.9
<2.4
<4.9
49 JK
270
HR4C01
HR4C01-03
Rear
0.98 JQK
4.3
200 JK
<1.0
0.40 JQK
25
12
45 JK
98
0.18
0.74 JQK
27
<5.1
<2.5
<5.1
44 jk
270
HR4C02
HR4C02-01
Rear
2 JQK
7.0
150 JK
<0.97
0.11 JQK
29
14
35
23
0.089 JH
0.63 JQK
23
<4.9
<2.4
<4.9
49
97
HR4C02
HR4C02-02
Rear
-| -| JQK
5.7
130 JK
<1.1
1 4 JK
42
11
38
100
0.12 JH
0.90 JQK
28
<5.3
<2.6
<5.3
41
130
HR4C02
HR4C02-03
Rear
2 2 JQ^
5.0
140 JK
<0.95
6.5 JK
31
11
72
130
0.15 JH
-J 4 JQK
38
<4.7
<2.4
<4.7
39
240
HR4C03
HR4C03-01
Front
2.1 JQK
3.3
180 JK
<0.74
2.4
26
14
55 JK
87 JK
0.12
1.0 JQK
25
0.39 JQK
<1.8
<3.7
48 JK
310
HR4C03
HR4C03-02
Rear
1.4 JQK
5.2
220 JK
<1.2
1.1 JQK
28
14
68 JK
120 JK
0.19
1.1 JQK
22 JK
<5.8
<2.9
<5.8
49 JK
320
HR4C03
HR4C03-03
Rear
2.4 JQK
9.3
270 JK
<0.84
3.0
32
16
65 JK
210 JK
0.25
1.2 JQK
25 JK
0.73 JQK
<2.1
<4.2
58 JK
380
1-10(5 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sub-RZ
Property
Sample No.
Yard
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
HRS Soil Screening Benchmark(1)
5.9
22
459
1.3
3.1
65
26
142
401
0.53
3.3
84
9.2
4.7
3.9
107
630
Residential RSL
31
0.68
15,000
160
7.1
„<2>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
RZ-4c
HR4C04
HR4C04-01
Front
0.92 JQK
30
160 JK
<1.0
0.48 JQK
24
13 JK
44 jk
74 JK
0.16 JK
1 2 JQK
22 JK
<5.1
<2.5
<5.1
46 JK
210 JK
HR4C04
HR4C04-02
Side
15 JQK
4 -J JK
250 JK
<0.96
1.3
25
10 JK
47 JK
260 JK
0.22 JK
-j Q JQK
22 JK
<4.8
<2.4
<4.8
40 JK
430 JK
HR4C04
HR4C04-03
Rear
-| j JQK
4.3 JK
200 JK
<0.91
1.5
27
9.7 JK
70 JK
200 JK
0.23 JK
1.9
27 JK
<4.5
<2.3
<4.5
36 JK
490 JK
HR4C05
HR4C05-01
Front
0.92 JQK
5.5 JK
210 JK
<0.98
0.70 JQK
31
14 JK
48 JK
130 JK
0.19 JK
0.89 JQK
36 JK
<4.9
<2.4
<4.9
51 JK
280 JK
HR4C05
HR4C05-02
Front
<3.2
19 JQK
66 JK
<1.1
<1.1
9.8
4.7 JK
17 JK
79 JK
0.12 JK
o
CO
7.9 JK
<5.3
<2.7
<5.3
23 JK
81 JK
HR4C05
HR4C05-03
Rear
0.97 JQK
6.0 JK
220 JK
<1.1
1.1
39
13 JK
58 JK
120 JK
0.35 JK
0.86 JQK
27 JK
<5.3
<2.6
<5.3
47 JK
340 JK
HR4C06
HR4C06-01
Rear
2.3 JQK
4.2
140 JK
<0.95
1.5 JK
27
12
52
110
0.13 JH
-| 4 JQK
25
<4.8
<2.4
<4.8
46
260
HR4C06
HR4C06-02
Rear
-J -J JQK
4.1
140 JK
<0.92
1.0 JK
29
13
46
100
0.097 JH
-j 0 JQK
26
<4.6
<2.3
<4.6
48
210
HR4C06
HR4C06-02(D|
Rear
0.95 JQK
4.2
170 JK
<0.94
1.2 JK
26
13
45
95
0.14 JH
1.3 JQK
28
<4.7
<2.4
<4.7
48
190
HR4C06
HR4C06-03
Front
1 1 Jul
4.7
190 JK
<0.95
1.5 JK
33
14
61
130
0.16 JH
13 JuK
33
<4.8
<2.4
<4.8
51
300
HR4C07
HR4C07-01
Front
1 6 Jf"
6.8
230 JK
<1.0
1.3 JK
32
16
50
140
0.19 JH
1 2 Jni
29
<5.1
<2.6
<5.1
56
340
HR4C07
HR4C07-02
Rear
22 jui
5.7
380 JK
<1.0
3.1 JK
35
14
84
350
0.23 JH
1 4 jui
39
<5.2
0.68 Juh
<5.2
54
420
HR4C07
HR4C07-03
Rear
1 3
6.5
220 JK
<0.98
1.7 JK
32
14
62
170
0.13 JH
14 JyK
23
<4.9
1 0 jr"
<4.9
52
410
soil exposure pathway is 'significantly above background" (see Section 3 2 1)
2 = an RSL for Total (i e , unspeciated) chromium has not been established
D = Field Duplicate Sample
L - LuvvBias
Q = The reported result is less than the SQL
RSL = EPA Regional Screening Level (May 2023, THQ =1 0, Risk = 10-6)
RZ = Residential Sampling Zone
SQL = Sample Quantitation Limit
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
1-10(6 of 6)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 11: Stage 3 - Residential Soil Sampling Results - ISM
Sub-RZ
Sample No.
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Shromiurr
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadiurr
Zinc
Residential RSL
31
0.68
15,000
160
7.1
..ft
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
RZ-1a
IR1A-01
1 4 JQK
6.6
210
0.58 JQK
1.6 JQK
27
9.6
57
190
0.16
1 -J JQK
45
<9.6
<4.8
4.7 JQK
40
350
RZ-1b
IR1B-01
1 1 JQK
6.1
180
0.40 JQK
7 JQK
27
7.3
45
190
0.23
0.85 JQK
20
<9.4
<4.7
2 g JQK
31
300
RZ-1b
IR1B-02
0.93 JQK
6.6
190
0.46 JQK
1.6 JQK
27
7.5
47
170
0.18
0.77 JQK
24
<9.5
<4.7
3.9 JQK
35
300
RZ-1b
IR1B-03
1 4 JQK
6.9
170
0.45 JQK
7 JQK
30
7.4
46
180
0.27
0.72 JQK
24
<9.3
<4.7
4 1 JQK
33
290
RZ-1b
IR1B-AV(2)
1 -J JQK
6.5
180
0.44 JQK
-| 7 JQK
28
7.4
46
180
0.23
0.78 JQK
23
<9.5
<4.7
3.6 JQK
33
297
RZ-1c
IR1C-01
1 2 J°K
4.6 JQK
150
0.45 JQK
-j g JQK
22
7.5
51
240
0.16
0.88 JQK
27
<9.3
<4.6
3.0 JQK
34
270
RZ-2a
IR2A-01
0.56 JQK
4 -| JQK
150
0.34 JQK
1.3 JQK
23
6.3
35
220
0.55 JK
0.74 JQK
14 JK
<9.4
<4.7
2.8 JQK
29
300
RZ-2a
IR2A-02
1 2 J°K
5.2 JQK
200
0.39 JQK
1 5 JQK
30
6.3
37
220
0.25 JK
1 1 JQK
29 JK
<9.4
<4.7
3.0 JQK
32
320
RZ-2a
IR2A-03
1 -J JQK
4.3 JQK
150
0.35 JQK
1.3 JQK
26
6.0
37
290
0.26 JK
0.87 JQK
15 JK
<9.4
<4.7
3.0 JQK
29
300
RZ-2a
IR2A-AV(2)
0.95 JQK
4 5 jqk
167
0.36 JQK
1 4 JQK
26
6.2
36
243
0.35 JK
0.90 JQK
19 JK
<9.4
<4.7
2 g JQK
30
307
RZ-2b
IR2B-01
0.56 JQK
3.7 JQK
150
0.38 JQK
-j ^ JQK
18
5.8
34
150
0.25
0.54 JQK
13
<9.6
<4.8
3.0 JQK
33
260
RZ-2c
IR2C-01
0.76 JQK
5.7
140
0.37 JQK
g JQK
22
6.4
40
170
0.31
0.61 JQK
19
<9.3
<4.6
3.8 JQK
32
250
RZ-3a
IR3A-01
0.62 JQK
4.7 JQK
130
0.34 JQK
0.87 JQK
21
5.9
32
170
0.26
0.60 JQK
20
<9.3
<4.7
2.9 JQK
31
230
RZ-3b
IR3B-01
0.63 JQK
4.2 JQK
170
0.40 JQK
2 JQK
27
6.5
37
180
0.18
0.67 JQK
16
<9.3
<4.7
3.7 JQK
36
280
RZ-3c
IR3C-01
0.76 JQK
2.8 JQK
130
0.35 JQK
Q JQK
19
6.4
35
140
0.16
0.63 JQK
16
<9.5
<4.7
3.2 JQK
32
220
RZ-3c
IR3C-02
0.76 JQK
3.4 JQK
130
0.38 JQK
j q JQK
19
6.6
37
120
0.17
0.52 JQK
19
<9.5
<4.7
3.0 JQK
32
240
RZ-3c
IR3C-03
0.95 JQK
3.7 JQK
130
0.36 JQK
j j JQK
19
6.6
38
180
0.17
0.67 JQK
17
<9.3
<4.7
3.0 JQK
33
220
RZ-3c
IR3C-AV®
0.82 JQK
3.3 JQK
130
0.36 JQK
-j q JQK
19
6.5
37
147
0.17
0.61 JQK
17
<9.5
<4.7
3 1 JQK
32
227
RZ-4a
IR4A-01
0.67 JQK
3.6 JQK
130
0.34 JQK
0.97 JQK
16
5.7
34
150
0.09
0.82 JQK
14
<9.3
<4.7
2.4 JQK
29
230
RZ-4b
IR4B-01
-| g JQK
3.8 JQK
280
0.43 JQK
j g JQK
20
7.3
55
220
0.16
0.89 JQK
17
<9.5
<4.8
4 4 JQK
34
360
RZ-4c
IR4C-01
1 g JQK
5.5
220
0.73 JQK
q JQK
27
10
61
170
0.23
1 4 JQK
33
<9.2
<4.6
5 4 jqk
42
380
Notes:
Qualifier Definit
ons:
Definitions:
all values are reported In mg/kg
Samples collected in August 2022
1 = an RSL for Total (i.e., unspeciated) chromium has not been established.
2 = "-AV" Result is Arithmetic Mean of Primary (-01), Duplicate (-02), and Triplicate (-03) Sample Results
H = High Bias
J = The result is an estimated quantity
K = Unknown Bias
L = Low Bias
Q = The reported result is less than the SQL
ISM = Incremental Sampling Methodology
mg/kg = milligram per kilogram
MO = Molybdenum
RSL = EPA Regional Screening Level (May 2023; THQ =1.0, Risk = 10-6)
RZ = Residential Sampling Zone
SQL = Sample Quantitation Limit
<## = Analyte not detected at or above indicated Sample Quantitation Limit (SQL)
T-11 (1 of 1)
-------
Central Metal SI Report
CAN0090332
September 2023
TABLES
Table 12: Stage 3 - Residential Soil Sampling - Lead Results Summary
Residential
Zone
Residential
Subzone'2'
Residential Shallow Soil Sample Results & Locations<1>
(F = Front Yard; R = Rear Yard; S = Side Yard)
Assigned Subzone Property No:
01
02
03
04
05
06
07
08
09
10
Property Sample No:
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
RZ-1
(Walnut
Park)
RZ-1 a
(HR1A)
140
150
110
89
170
270
140
380
720
150
130
140
180
210
270
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
F
F
F
F
R
R
F
R
R
F
R
R
R
R
R
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
RZ-1b
(HR1B)
75
280
310
170
230
190
140
240
200
110
67
75
210
180
200
170
67
100
140
130
150
180
270
200
86
150
140
78
110
240
F
R
R
F
R
R
F
R
R
F
F
F
F
F
R
R
F
F
F
R
R
F
R
R
F
R
R
F
R
R
RZ-1c
(HR1C)
150
430
200
120
110
150
170
170
130
250
230
260
270
750
290
120
150
170
250
180
190
-
-
-
-
-
-
-
-
-
F
R
R
F
F
F
F
R
R
F
R
R
F
R
R
F
F
F
F
R
R
--
-
-
--
-
-
--
-
-
RZ-2
(Walnut
Park)
RZ-2a
(HR2A)
910
740
440
140
210
310
76
77
96
750
270
170
150
160
410
160
120
300
49
48
360
-
-
-
-
-
-
-
-
-
R
R
F
F
R
R
F
F
R
F
R
R
F
F
R
F
F
R
F
F
R
--
-
-
--
-
-
--
-
-
RZ-2b
(HR2B)
110
190
190
140
160
92
140
150
200
180
160
210
130
150
240
250
240
76
69
75
380
-
-
-
-
-
-
-
-
-
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
R
R
F
F
F
R
--
-
-
--
-
-
--
-
-
RZ-2c
(HR2C)
84
180
150
250
190
140
120
89
130
85
130
130
130
120
120
120
550
430
230
760
98
-
-
-
-
-
-
-
-
-
F
R
R
F
F
F
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
--
-
-
--
-
-
--
-
-
RZ-3
(Walnut
Park)
RZ-3a
(HR3A)
84
90
93
290
310
150
110
530
720
96
130
110
140
140
78
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
S
R
F
R
s
F
F
R
R
R
R
F
R
F
F
--
-
-
-
-
-
--
-
-
--
-
-
--
-
-
RZ-3b
(HR3B)
95
290
200
110
150
180
64
84
160
100
140
120
130
850
330
95
270
180
92
200
210
160
280
370
-
-
-
-
-
-
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
F
R
F
F
R
R
--
-
-
--
-
-
RZ-3c
(HR3C)
130
160
97
78
110
180
88
280
110
97
120
110
170
330
140
-
-
-
44
44
44
98
130
310
-
-
-
-
-
-
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
--
-
-
F
F
F
F
F
R
--
-
-
--
-
-
RZ-4
(Florence-
Firestone)
RZ-4a
(HR4A)
59
120
120
76
92
97
72
95
280
38
180
100
-
-
-
95
110
140
7 70
730
140
140
140
130
F
R
R
F
F
F
F
F
R
F
R
R
--
-
-
F
F
R
F
F
F
F
F
F
--
-
-
--
-
-
RZ-4b
(HR4B)
140
160
150
170
320
560
73
960
74
760
300
290
59
140
300
98
130
65
-
-
-
-
-
-
-
-
-
-
-
-
F
s
s
F
R
R
F
R
F
F
R
R
F
R
R
F
R
R
--
--
-
--
--
--
--
-
-
--
-
-
RZ-4c
(HR4C)
210
150
98
23
100
130
87
120
270
74
260
200
730
79
120
110
100
130
140
350
170
-
-
-
-
-
-
-
-
-
F
R
R
R
R
R
F
R
R
F
s
R
F
F
R
R
R
F
F
R
R
--
--
--
--
-
-
--
-
-
Notes:
All values are reported In mg/kg
Bold & Underlined values Indicate results that exceed the lead HRS Soil Screenlna Benchmark of 401 ma/ka (see Section 3.2.1.31
Italic values Indicate results are estimated (I.e., J-flagged)
For duplicate samplest, only the greater of the two values Is presented.
Samples collected In August 2022
1 = Presented values are from the Four-Point Composite sample dataset. Incremental Sample Methodology (ISM) results are provided In Table 11
2 = Text in parentheses is the subzone sample code (e.g., HR1A indicates subzone RZ-1a in sample ID No. HR1A02-03; with "02" indicating the 2nd property within that
subzone and "-03" indicating the third sample from that property)
Definitions:
mg/kg = milligrams per kilogram
-- = Not Applicable
T-12 (1 of 1)
-------
Central Metal SI Report
CAN0090332
September 2023
TABLES
Table 13: Stage 3 - Residential Soil Sampling - Arsenic Results Summary
Residential
Zone
Residential
Subzone'2'
Residential Shallow Soil Sample Results & Locations<1>
(F = Front Yard; R = Rear Yard; S = Side Yard)
Assigned Subzone Property No:
01
02
03
04
05
06
07
08
09
10
Property Sample No:
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
-01
-02
03
RZ-1
(Walnut
Park)
RZ-1 a
(HR1A)
9.1
19
10
4.4
9.5
9.8
5.8
5.0
4.4
6.3
7.1
7.7
4.7
5.1
5.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
F
F
F
F
R
R
F
R
R
F
R
R
R
R
R
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
RZ-1b
(HR1B)
2.9
3.3
5.0
4.3
4.7
7.5
7.2
4.8
5.2
51
64
29
6.1
5.1
4.9
4.7
2.3
2.6
9.9
8.7
13
2.3
5.2
4.2
5.0
4.3
7.5
3.2
5.5
6.9
F
R
R
F
R
R
F
R
R
F
F
F
F
F
R
R
F
F
F
R
R
F
R
R
F
R
R
F
R
R
RZ-1c
(HR1C)
7.6
8.3
5.9
5.1
3.9
6.3
5.5
5.9
5.1
5.5
5.8
7.2
4.1
5.3
3.4
3.4
4.4
4.4
5.7
4.9
4.8
-
-
-
-
-
-
-
-
-
F
R
R
F
F
F
F
R
R
F
R
R
F
R
R
F
F
F
F
R
R
--
-
-
--
-
-
--
-
-
RZ-2
(Walnut
Park)
RZ-2a
(HR2A)
6.1
6.3
7.6
4.2
12
10
3.3
3.2
5.1
3.0
3.2
3.0
4.1
3.8
4.9
2.7
2.3
4.2
19
2.7
8.7
R
R
F
F
R
R
F
F
R
F
R
R
F
F
R
F
F
R
F
F
R
--
-
-
--
-
-
--
-
-
RZ-2b
(HR2B)
2.5
2.7
3.1
3.1
2.9
3.3
4.4
2.4
3.8
5.3
4.9
5.1
3.0
3.3
3.6
2.8
3.0
3.1
2.5
2.8
6.5
-
-
-
-
-
-
-
-
-
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
R
R
F
F
F
R
--
-
-
--
-
-
--
-
-
RZ-2c
(HR2C)
3.9
12
16
9.6
9.5
4.2
3.3
3.5
3.1
2.5
3.8
3.1
13
23
3.4
2.6
7.1
6.0
9.1
9.0
7.5
-
-
-
-
-
-
-
-
-
F
R
R
F
F
F
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
--
-
-
--
-
-
--
-
-
RZ-3
(Walnut
Park)
RZ-3a
(HR3A)
4.9
6.1
6.2
7.9
11
4.8
3.2
4.5
4.9
4.6
4.2
3.4
5.0
4.0
2.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
S
R
F
R
S
F
F
R
R
R
R
F
R
F
F
-
-
-
--
-
-
--
-
-
--
-
-
--
-
-
RZ-3b
(HR3B)
2.5
7.3
4.9
3.6
2.7
3.5
2.9
2.9
3.0
3.2
5.0
4.0
3.1
5.5
3.3
2.3
2.8
2.1
5.5
4.9
3.5
5.2
6.3
8.5
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
F
R
F
F
R
R
--
-
-
--
-
-
RZ-3c
(HR3C)
3.0
3.9
2.6
4.2
2.5
5.1
2.5
4.7
4.1
2.5
8.7
3.5
3.2
2.7
2.5
-
-
-
2.6
3.1
2.9
2.9
2.9
4.4
-
-
-
-
-
-
F
R
R
F
R
R
F
R
R
F
R
R
F
R
R
--
-
-
F
F
F
F
F
R
--
-
-
--
-
-
RZ-4
(Florence-
Firestone)
RZ-4a
(HR4A)
2.0
2.0
1.7
3.5
3.3
3.9
4.4
5.8
3.9
7.4
7.7
8.1
-
-
-
5.7
7.2
4.1
2.5
2.7
2.5
6.5
4.0
3.6
-
-
-
-
-
-
F
R
R
F
F
F
F
F
R
F
R
R
--
-
-
F
F
R
F
F
F
F
F
F
--
-
-
--
-
-
RZ-4b
(HR4B)
4.1
5.6
4.6
4.3
3.4
3.5
4.4
6.1
4.8
4.1
6.2
5.3
3.9
5.1
6.4
3.6
4.4
3.6
-
-
-
-
-
-
-
-
-
-
-
-
F
s
s
F
R
R
F
R
F
F
R
R
F
R
R
F
R
R
--
--
--
--
--
--
--
-
-
--
-
-
RZ-4c
(HR4C)
6.3
4.7
4.3
7.0
5.7
5.0
3.3
5.2
9.3
30
4.1
4.3
5.5
1.9
6.0
4.2
4.2
4.7
6.8
5.7
6.5
-
-
-
-
-
-
-
-
-
F
R
R
R
R
R
F
R
R
F
s
R
F
F
R
R
R
F
F
R
R
--
--
--
--
-
-
--
-
-
Notes:
All values are reported In mg/kg
Bold & Underlined values Indicate results that exceed the lead HRS Soil Screenlna Benchmark of 401 ma/ka (see Section 3.2.1.31
Italic values Indicate results are estimated (I.e., J-flagged)
For duplicate samplest, only the greater of the two values Is presented.
Samples collected In August 2022
1 = Presented values are from the Four-Point Composite sample dataset. Incremental Sample Methodology (ISM) results are provided In Table 11
2 = Text in parentheses is the subzone sample code (e.g., HR1A indicates subzone RZ-1a in sample ID No. HR1A02-03; with "02" indicating the 2nd property within that
subzone and "-03" indicating the third sample from that property)
Definitions:
mg/kg = milligrams per kilogram
-- = Not Applicable
T-13 (1 of 1)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Table 14: Stage 3 - Background Soil Sampling Results
Sample
Type
sub-BZ
Sample No.
Analyte
Antimony | Arsenic
Barium | Beryllium
Cadmium | Chromium
Cobalt | Copper
Lead | Mercury
Mo | Nickel
Selenium | Silver
Thallium | Vanadium
Zinc
Residential RSL
31 | 0.68
15,000 | 160
7.1 | -l1'
23 | 3,100
400 | 11
390 | 1,500
390 | 390
0.78 | 390
23,000
Franklin D. Roosevelt Park (BZ-1)
4-Point Comp.
BZ-1 A
HB1A-01
0.35 JQK
4.4
130
0.89 JQK
0.36 JQK
20
9.1
30
39
0.16
0.64 JQK
62 JK
<4.9
<2.5
3.3 JQK
45
110
BZ-1 A
HB1A-02
<2.3
3.7
120
0.83
0.32 JQK
17
8.3
28
22
0.064
0.69 JQK
55 JK
<3.9
<1.9
3.0 JQK
42
82
BZ-1 A
HB1A-03
0.99 JQK
4.7
180
0.88 JQK
0.90
22
9.2
56
120
0.17
0.99 JQK
34 JK
<4.5
<2.2
3.5 JQK
43
310
BZ-1 A
HB1A-04
1.9 JQK
5.3
150
0.84 JQK
0.87 JQK
23
8.9
50
160
0.10
0.99 JQK
75 JK
<4.9
<2.5
3.5 JQK
43
250
BZ-1 A
HB1A-05
0.46 JQK
4.0
120
0.74 JQK
0.36 JQK
17
7.6
26
33
0.071
1.0 JQK
20 JK
<4.7
<2.4
2.7 JQK
38
100
BZ-1 A
HB1A-05(D|
0.48 JQK
4.0
110
0.65 JQK
0.36 JQK
16
7.1
25
32
0.084
0.98 JQK
19 JK
<3.7
<1.9
2 4 jqk
35
94
ISM
BZ-1 A
IB1A-01
0.89 JQK
4.3 JQK
140 JK
0.60 JQK
0.49 JQK
19
8.7
37
66 JK
0.15
0.90 JQK
45 JK
<9.6
<4.8
2 Q JQK
37
180 JK
BZ-1 A
IB1A-02
13 JQK
3.6 JQK
120 JK
0.55 JQK
0.56 JQK
17
8.1
37
71 JK
0.15
0.74 JQK
31 JK
<9.2
<4.6
1 g JQK
37
170 JK
BZ-1 A
IB1A-03
0.73 JQK
4 5 JQK
150 JK
0.58 JQK
0.52 JQK
20
8.3
39
89 JK
0.17
0.83 JQK
30 JK
<9.9
<4.9
1 5 JQK
38
210 JK
BZ-1 A
IB1A-AV121
0.97 JQK
4 -| JQK
137 JK
0.58 JQK
0.52 JQK
19
8.4
38
75 JK
0.16
0.82 JQK
35 JK
<9.9
<4.9
1 g JQK
37
187 JK
4-Point Comp.
BZ-1 B
HB1B-01
0.70 JQK
4.2
120
0.71 JQK
0.47 JQK
18
7.3
43
56
0.13
0.84 JQK
44 JK
<5.0
<2.5
2.6 JQK
38
150
BZ-1 B
HB1B-02
1 4
6.1
180
0.91 JQK
1.5
25
9.8
61
270
0.19
1 4 JQK
46 JK
<4.8
<2.4
3.6 JQK
48
340
BZ-1 B
HB1B-03
0.62 JQK
4.6
140
0.80 JQK
0.56 JQK
19
8.1
34
60
0.17
1.0 JQK
21 JK
<4.6
<2.3
2.7 JQK
42
160
BZ-1 B
HB1B-04
0.25 JQK
3.5
100
0.73
0.30 JQK
16
7.2
34
29
0.093
0.70 JQK
48 JK
<3.3
<1.7
2.2 JQK
37
86
BZ-1 B
HB1B-04(D|
0.43 JQK
3.7
110
0.77
0.34 JQK
16
7.6
26
30
0.085
0.68 JQK
18 JK
<3.3
<1.6
2.1 JQK
39
88
BZ-1 B
HB1B-05
<2.8
3.3
130
0.68 JQK
0.25 JQK
14
6.6
32
710
0.064
0.81 JQK
54 JK
<4.6
<2.3
2.2 JQK
34
120
ISM
BZ-1 B
IB1B-01
0.84 JQK
3.8 JQK
140 JK
0.61 JQK
0 44 JQK
19
8.6
35
65 JK
0.10
0.81 JQK
40 JK
<9.4
<4.7
13 JQK
39
160 JK
BZ-1 B
IB1B-02
<6.9
3.4 JQK
130 JK
0.57 JQK
0.34 JQK
17
7.9
31
60 JK
0.10
0.65 JQK
24 JK
<11
<5.7
2 g JQK
37
150 JK
BZ-1 B
IB1B-03
0.93 JQK
3.8 JQK
140 JK
0.59 JQK
0.45 JQK
18
8.5
40
82 JK
0.12
0.83 JQK
31 JK
<9.5
<4.8
<9.5
36
160 JK
BZ-1 B
IB1B-AV121
0.89 JQK
3.7 JQK
137 JK
0.59 JQK
0.41 JQK
18
8.3
35
69 JK
0.11
0.76 JQK
32 JK
<11
<5.7
1 g JQK
37
157 JK
4-Point Comp.
BZ-1C
HB1C-01
0.50 JQK
3.1
HO JK
0.56 JQK
0.39 JQK
18
6.9
29
34 JK
0.073
0.63 JQK
50
<4.2
<2.1
1.8 JQK
34
110
BZ-1C
HB1C-02
0.67 JQK
3.7
150 JK
0.58 JQK
0.73 JQK
19
7.5
36
100 JK
0.11
1.0 JQK
46
<3.7
<1.9
1.8 JQK
35
260
BZ-1C
HB1C-03
2.2 JQK
3.7
180 JK
0.59 JQK
0.72 JQK
20
7.1
42
140 JK
0.10
1.3 JQK
33
<4.7
<2.3
1.8 JQK
34
220
BZ-1C
HB1C-04
0.41 JQK
3.5
150 JK
0.66 JQK
0.56 JQK
20
8.4
23
28 JK
0.056
0.77 JQK
48
<3.6
<1.8
17 JQK
37
120
BZ-1C
HB1C-05
0.66 JQK
4.7
120 JK
0.60 JQK
0.69 JQK
19
7.7
38
61 JK
0.31
0.92 JQK
67
<3.5
<1.8
1.8 JQK
35
140
ISM
BZ-1C
IB1C-01
0.78 JQK
3.9 JQK
140 JK
0.52 JQK
0.36 JQK
17
6.9
34
68 JK
0.12
0.97 JQK
40 JK
<9.4
<4.7
13 JQK
34
160 JK
BZ-1C
IB1C-02
0.89 JQK
3.7 JQK
150 JK
0.54 JQK
0.45 JQK
17
7.4
34
72 JK
0.12
1 2 JQK
120 JK
<8.9
<4.5
1 g JQK
35
180 JK
BZ-1C
IB1C-03
0.74 JQK
4 -| JQK
140 JK
0.51 JQK
0 44 JQK
16
6.9
30
69 JK
0.11
0.98 JQK
19 JK
<9.1
<4.6
1 q JQK
33
160 JK
BZ-1C
IB1C-AV121
0.80 JQK
3.9 JQK
143 JK
0.52 JQK
0 42 JQK
17
7.1
33
70 JK
0.12
1 1 JQK
60 JK
<9.4
<4.7
1 4 JQK
34
167 JK
Walnut Park Pocket Park (BZ-2)
4-Point Comp.
BZ-2A
HB2A-01
<2.6
4.1
120 JK
0.58 JQK
0.63 JQK
20
8.1
26
40 JK
0.14
0.57 JQK
33
<4.3
<2.2
2.0 JQK
36
310
BZ-2A
HB2A-02
0.42
JQK
6.1
130 JK
0.53 JQK
0.75 JQK
21
7.6
46
93 JK
0.26
0.95 JQK
38
<4.7
<2.3
1.8 JQK
35
200
BZ-2A
HB2A-03
0.26
JQK
3.8
140 JK
0.58 JQK
0.68 JQK
21
8.2
26
90 JK
0.22
0.55 JQK
55
<4.3
<2.2
2.0 JQK
37
180
BZ-2A
HB2A-04
0.86
JQK
18
150 JK
0.54 JQK
0.80
24
7.4
36
140 JK
0.18
0.53 JQK
44
<3.6
<1.8
2.0 JQK
36
200
BZ-2A
HB2A-05
0.80
JQK
6.4
130 JK
0.53 JQK
1.4
22
7.7
39
200 JK
0.21
0.72 JQK
25
<3.7
<1.9
1.9 JQK
36
280
ISM
BZ-2A
IB2A-01
0.88
JQK
4 g JQK
HO JK
0.46 JQK
0.56 JQK
15 JK
7.4
32 JK
91 JK
0.21
0.38 JQK
26 JK
<9.5
<4.7
2 Q JQK
32
170
BZ-2A
IB2A-02
<5.6
4 Q JQK
140 JK
0.49 JQK
0.53 JQK
20 JK
7.9
36 JK
100 JK
0.21
0.65 JQK
26 JK
<9.4
<4.7
¦j y JQK
33
170
BZ-2A
IB2A-03
1.4
JQK
6.0
130 JK
0.50 JQK
0.59 JQK
20 JK
7.9
35 JK
95 JK
0.23
0.56 JQK
30 JK
<9.2
<4.6
1 g JQK
34
180
BZ-2A
IB2A-AV121
1.1
JQK
5.2
127 JK
0.48 JQK
0.56 JQK
18 JK
7.7
34 JK
95 JK
0.22
0.53 JQK
27 JK
<9.5
<4.7
1 g JQK
33
173
Garden View Road Verge (BZ-3)
4-Point Comp.
BZ-3A
HB3A-01
2.9
3.9
180
0.37 JQK
1.5
24
9.2
48
190
0.21
1.8
22
0.43 JQK
<2.3
<4.6
42
350
BZ-3A
HB3A-02
3.2
4.3
170
0.48 JQK
1.5
25
10
50
230
0.20
H JQK
32
0.31 JQK
<1.9
<3.8
41
330
BZ-3A
HB3A-03
3.0
6.3
150
0.49 JQK
1.2
36
10
41
160
0.18
1.0 JQK
23
<4.3
<2.1
<4.3
48
210
BZ-3A
HB3A-04
2.3
JQK
2.9
160
0.41 JQK
0.98
27
9.0
40
130
0.19
1.3 JQK
19
<4.4
<2.2
<4.4
39
210
BZ-3A
HB3A-05
2.8
JQK
8.7
170
0.51 JQK
0.94 JQK
26
11
45
120
0.18
1.0 JQK
26
0.44 JQK
<2.6
<5.1
46
240
ISM
BZ-3A
IB3A-01
2.2
JQK
6.4
200
0.61 JQK
1 5 JQK
29
9.7
61
200
0.20 JK
1 4 JQK
29
<9.3
<4.6
1 4 JQK
38
360
BZ-3A
IB3A-02
1.7
JQK
6.2
190
0.63 JQK
1 2 JQK
28
9.2
55
170
0.15 JK
13 JQK
24
<9.5
<4.7
1 5 JQK
38
310
BZ-3A
IB3A-03
1.3
JQK
7.2
190
0.61 JQK
1 2 JQK
31
9.1
86
180
0.17 JK
1 4 JQK
22
<9.3
<4.7
16 JQK
37
260
BZ-3A
IB3A-AV121
1.7
JQK
6.6
193
0.62 JQK
13 JQK
29
9.3
67
183
0.17 JK
1 4 JQK
25
<9.5
<4.7
1 5 JQK
38
310
4-Point Comp.
BZ-3B
HB3B-01
3.9
220
170 JK
0.57 JQK
1.3
41
11
42
1,600 JK
0.21 JK
12 JQK
31
0.30 JQK
<1.7
<3.4
48 JK
220 JK
BZ-3B
HB3B-02
4.1
40
130 JK
0.48 JQK
1.2
31
9.3
35
160 JK
0.18 JK
0.96 JQK
33
0.84 JQK
<2.3
<4.6
43 JK
240 JK
BZ-3B
HB3B-03
2.8
15
120 JK
0.42 JQK
0.76
20
9.2
33
180 JK
0.19 JK
0.91 JQK
26
<3.7
<1.9
<3.7
40 JK
200 JK
BZ-3B
HB3B-03(D|
1.3
JQK
18
140 JK
0.85
1.4
20 JK
9.9
39
220 JK
0.19 JK
0.78 JQK
24
<4.1
0.61 JQK
2.6 JQK
42
260 JK
BZ-3B
HB3B-04
2.2
JQK
8.6
150 JK
0.61 JQK
0.75 JQK
25
11
36
79 JK
0.29 JK
n JQK
23
<4.7
<2.4
<4.7
47 JK
150 JK
BZ-3B
HB3B-05
2.9
4.9
180 JK
0.58 JQK
1.3
32
12
52
140 JK
0.21 JK
1.0 JQK
33
<4.2
<2.1
<4.2
51 JK
280 JK
T-14 (1 of 3)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sample
sub-BZ
Sample No.
Analyte
Type
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Re
sidential RSL
31
0.68
15,000
160
7.1
„<1>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
BZ-3B
IB3B-01
1.8
JQK
11
170
0.62 JQK
0.94 JQK
27
9.0
47
180
0.25 JK
13 JQK
25
<9.2
<4.6
16 JQK
38
240
BZ-3B
IB3B-02
1.4
JQK
14
180
0.63 JQK
0.92 JQK
27
9.2
43
200
0.17 JK
.| 4 JQK
27
<9.6
<4.8
2 Q JQK
39
220
BZ-3B
IB3B-03
2.2
JQK
16
170
0.62 JQK
0.98 JQK
27
9.3
47
200
0.18 JK
^ 2 JQK
27
<9.4
<4.7
^ y JQK
39
220
BZ-3B
IB3B-AV121
1.8
JQK
14
173
0.62 JQK
0.95 JQK
27
9.2
46
193
0.20 JK
13 JQK
26
<9.6
<4.8
-j g JQK
39
227
Q.
BZ-3C
HB3C-01
0.82
JQK
2.7
120 JK
0.58 JQK
0.95
19 JK
6.5
30
99 JK
0.15 JH
0.76 JQK
15
<4.5
<2.3
1.7 JQK
30
130 JK
E
o
BZ-3C
HB3C-02
1.7
JQK
4.5
130 JK
0.75 JQK
1.3
19 JK
9.0
47
160 JK
0.17 JH
0.78 JQK
47
<4.7
<2.4
2i JQK
39
280 JK
BZ-3C
HB3C-03
0.76
JQK
2 4 JQK
95 JK
0.49 JQK
0.71 JQK
11 JK
5.7
24
170 JK
0.34 JH
0.52 JQK
24
<4.4
<2.2
1.7 JQK
27
130 JK
o
CL
BZ-3C
HB3C-04
1.3
JQK
4.7
140 JK
0.72 JQK
1.6
22 JK
9.9
49
140 JK
0.10 JH
H JQK
23
<4.6
<2.3
2 4 JQK
40
240 JK
T
BZ-3C
HB3C-05
1.2
JQK
4.8
170 JK
0.82 JQK
1.6
27 JK
9.6
51
170 JK
0.38 JH
0.92 JQK
39
<4.5
0.50 JQK
2.3 JQK
41
290 JK
BZ-3C
IB3C-01
2.4
JQK
4 5 JQK
150
0.51 JQK
0.90 JQK
20
7.5
45
170
0.17 JK
-| -| JQK
20
<9.6
<4.8
2 2 JQK
32
230
2
BZ-3C
IB3C-02
1.3
JQK
5.6
150
0.47 JQK
0.98 JQK
21
7.0
50
180
0.17 JK
0.98 JQK
16
<9.1
<4.6
.| 5 JQK
31
260
BZ-3C
IB3C-03
1.9
JQK
3 JQK
130
0.18 JQK
^ 2 JQK
17 JK
6.7
42 JK
170
0.24 JK
0.82 JQK
15 JK
<9.3
<4.7
<9.3
23 JK
220
BZ-3C
IB3C-AV121
1.9
JQK
4 4 JQK
143
0.39 JQK
-j q JQK
19 JK
7.1
46 JK
173
0.19 JK
0.97 JQK
17 JK
<9.6
<4.8
-j g JQK
29 JK
237
S. Gate Road Verge (BZ-4)
BZ-4A
HB4A-01
1.6
JQK
6.4
210 JK
1.1
1.8
31 JK
13
60
170 JK
0.16 JL
14 JQK
47
<4.6
o.y JQK
2.9 JQK
55
440 JK
Q_
E
BZ-4A
HB4A-02
2.7
JK
6.1
180 JK
0.82
1.8
25 JK
11
65
380 JK
0.40 JL
1.8
31
<3.7
0.45 JQK
2.3 JQK
44
400 JK
O
BZ-4A
HB4A-02(D|
2.2
JQK
6.5
180 JK
0.92
2.0
26 JK
12
71
370 JK
0.55
1.9
30
<4.4
0.62 JQK
2.6 JQK
48
450 JK
_c
BZ-4A
HB4A-03
2.1
JQK
55
170 JK
0.88 JQK
1.3
22 JK
11
55
560 JK
0.16 JL
1.3 JQK
30
<4.7
<2.4
2 4 jqk
43
310 JK
a.
BZ-4A
HB4A-04
1.5
JQK
5.7
160 JK
0.98
1.4
27 JK
12
44
120 JK
0.12 JL
1.3 JQK
23
<4.5
0.87 JQK
3.2 JQK
51
190 JK
BZ-4A
HB4A-05
1.6
JQK
5.0
170 JK
0.98 JQK
1.4
23 JK
12
53
160 JK
0.11 JL
15 JQK
24
<4.9
<2.5
3.4 JQK
48
240 JK
BZ-4A
IB4A-01
2.1
JQK
6.8
170
0.35 JQK
.| 5 JQK
23 JK
10
48 JK
170
0.15 JK
-| -| JQK
20 JK
<9.5
<4.8
<9.5
36 JK
210
BZ-4A
IB4A-02
3.3
JQK
8.3
190
0.34 JQK
^ y JQK
26 JK
11
56 JK
160
0.18 JK
13 JQK
28 JK
<9.5
<4.7
-| -| JQK
46 JK
230
BZ-4A
IB4A-03
3.1
JQK
8.0
190
0.35 JQK
^ y JQK
26 JK
11
65 JK
170
0.15 JK
-| 5 JQK
36 JK
<9.6
<4.8
<9.6
45 JK
240
BZ-4A
IB4A-AV121
2.8
JQK
7.7
183
0.35 JQK
16 JQK
25 JK
11
56 JK
167
0.16 JK
13 JQK
28 JK
<9.6
<4.8
.| -| JQK
42 JK
227
Q.
BZ-4B
HB4B-01
2.0
JQK
5.1
180 JK
0.89 JQK
1.9
32 JK
12
63
330 JK
0.16 JL
1.9
31
<4.6
0.59 JQK
3.1 JQK
47
400 JK
E
o
BZ-4B
HB4B-02
1.6
JQK
4.3
140 JK
0.73 JQK
1.2
19 JK
9.0
39
200 JK
0.11 JL
n JQK
23
<4.4
<2.2
2 4 JQK
40
200 JK
BZ-4B
HB4B-03
2.3
JQK
2.8
130 JL
0.39 JQK
0.75 JQK
19 JK
8.7
31
120 JK
0.072 JL
0.93 JQK
17
<4.2
<2.1
<4.2
40
150 JL
o
CL
BZ-4B
HB4B-04
2.6
JQK
6.9
150 JL
0.35 JQK
0.90 JQK
22 JK
10
38
120 JK
0.10 JL
12 JQK
20
<5.0
<2.5
<5.0
43
170 JL
T
BZ-4B
HB4B-05
4.0
JK
4.6
170 JL
0.30 JQK
0.89 JK
20 JK
7.9
45
130 JK
0.18 JL
H JQK
21
0.39 JQK
<1.7
<3.3
36
210 JL
BZ-4B
IB4B-01
3.0
JQK
4 o JQK
160
0.26 JQK
-| 5 JQK
24
9.9
49
160
0.14 JH
13 JQK
24
<9.5
<4.8
<9.5
42
390
BZ-4B
IB4B-02
3.0
JQK
6.0
170
0.27 JQK
16 JQK
25
10
50
190
0.16 JH
13 JQK
27
<9.1
<4.6
<9.1
42
210
BZ-4B
IB4B-03
3.2
JQK
5.8
170
0.25 JQK
16 JQK
27
11
52
200
0.18 JH
.| 4 JQK
37
<9.6
<4.8
<9.6
45
220
BZ-4B
IB4B-AV121
3.1
JQK
5.3 JQK
167
0.26 JQK
16 JQK
25
10
50
183
0.16 JH
13 JQK
29
<9.6
<4.8
<9.6
43
273
BZ-4C
HB4C-01
2.8
JK
3.5
160 JL
0.47 JQK
0.84 JK
23 JK
9.8
37
100 JK
0.12 JL
0.86 JQK
23
0.55 JQK
<2.1
<4.2
43
160 JL
Q_
E
BZ-4C
HB4C-02
3.1
JK
3.2
250 JL
0.52 JQK
1.5 JK
27 JK
10
54
180 JK
0.16 JL
1 4 JQK
24
0.58 JQK
<2.1
<4.2
43
330 JL
O
BZ-4C
HB4C-03
2.3
JQK
5.4
160 JL
0.43 JQK
0.87 JQK
24 JK
9.6
42
200 JK
0.16 JL
1 4 JQK
24
0.54 JQK
<2.3
<4.6
43
200 JL
_c
BZ-4C
HB4C-04
2.7
JK
6.4
170 JL
0.56 JQK
0.97 JK
26 JK
9.7
43
140 JK
0.20 JL
H JQK
35
0.50 JQK
<1.8
<3.6
46
190 JL
a.
BZ-4C
HB4C-05
2.5
JK
4.8
150 JL
0.48 JQK
1.3 JK
28 JK
9.4
38
130 JK
0.21 JL
0.79 JQK
19
0.51 JQK
<2.0
<3.9
41
170 JL
BZ-4C
HB4C-05(D|
1.5
JQK
6.2
160 JK
0.93 JQK
1.9
28 JK
11
47
150 JK
0.14 JK
0.91 JQK
22
<5.0
<2.5
2.3 JQK
46
210 JK
BZ-4C
IB4C-01
2.8
JQK
4 Q JQK
170
0.30 JQK
1.8
25 JK
10
52 JK
230
0.28 JK
-| 4 JQK
21 JK
<9.4
<4.7
<9.4
41 JK
250
BZ-4C
IB4C-02
2.2
JQK
3.9 JQK
150
0.34 JQK
-| 5 JQK
17 JK
8.4
43 JK
200
0.34 JK
-j q JQK
16 JK
<9.2
<4.6
<9.2
28 JK
210
BZ-4C
IB4C-03
3.1
JQK
4 4 JQK
170
0.33 JQK
^ y JQK
24 JK
10
52 JK
220
0.29 JK
-j 2 JQK
20 JK
<9.1
<4.6
<9.1
43 JK
250
BZ-4C
IB4C-AV121
2.7
JQK
4 4 JQK
163
0.32 JQK
^ y JQK
22 JK
9.5
49 JK
217
0.30 JK
^ 2 JQK
19 JK
<9.4
<4.7
<9.4
37 JK
237
Leon H. Washington Park (BZ-5)
BZ-5A
HB5A-01
3.7
JK
25
110 JL
0.32 JQK
0.39 JQK
18 JK
8.0
48
59 JK
0.065 JH
0.71 JQK
28
0.33 JQK
<1.4
<2.8
34
180 JL
E
BZ-5A
HB5A-02
3.7
JK
25
140 JL
0.44 JQK
0.69 JQK
22 JK
9.4
48
90 JK
0.14 JH
15 JQK
21
0.57 JQK
<2.0
<4.1
43
160 JL
O
BZ-5A
HB5A-03
4.8
JK
14
130 JL
0.39 JQK
0.62 JQK
24 JK
9.8
44
65 JK
0.095 JH
12 JQK
22
0.53 JQK
<2.3
<4.6
43
140 JL
c
BZ-5A
HB5A-04
4.3
JK
20
110 JL
0.32 JQK
0.57 JQK
18 JK
7.9
58
69 JK
0.16 JH
1.0 JQK
20
<4.9
<2.5
<4.9
35
150 JL
CL
BZ-5A
HB5A-04(D|
3.5
JK
24
120 JK
0.65 JQK
1.2
19 JK
8.9
76
85 JK
0.13 JK
12 JQK
24
<4.5
<2.3
2.5 JQK
37
200 JK
BZ-5A
HB5A-05
3.9
19
140 JL
0.33 JQK
0.56 JQK
49 JK
7.8
58
74 JK
0.18 JH
2.3
19
17 JQK
<2.7
<5.4
41
170 JL
BZ-5A
IB5A-01
3.3
JQK
15
130
0.22 JQK
^ 2 JQK
22
8.9
58
96
0.13 JH
16 JQK
32
<9.5
<4.7
0.80 JQK
37
160
BZ-5A
IB5A-02
3.3
JQK
18
140
0.23 JQK
.| -| JQK
22
8.9
59
75
0.12 JH
2 Q JQK
27
<9.4
<4.7
<9.4
34
160
BZ-5A
IB5A-03
2.4
JQK
14
110
0.20 JQK
0.87 JQK
16
7.4
49
60
0.12 JH
-| 2 JQK
21
<9.4
<4.7
<9.4
27
140
BZ-5A
IB5A-AV121
3.0
JQK
16
127
0.22 JQK
-| -| JQK
20
8.4
55
77
0.12 JH
16 JQK
27
<9.5
<4.7
0.80 JQK
33
153
CL
BZ-5B
HB5B-01
4.0
JK
16
240 JL
0.34 JQK
0.82 JQK
21 JH
7.9
57
240 JK
0.25 JH
17 JQK
21
0.57 JQK
<2.6
<5.2
34
290 JL
E
o
BZ-5B
HB5B-02
3.2
JK
15
120 JL
0.52 JQK
0.30 JQK
25 JK
9.7
43
45 JK
0.099 JH
1.0 JQK
34
0.27 JQK
<1.7
<3.3
43
100 JL
BZ-5B
HB5B-03
4.6
JK
41
120 JL
0.40 JQK
5.2 JK
23 JK
8.4
58
52 JK
0.12 JH
1.8
25
<3.4
<1.7
<3.4
37
120 JL
o
BZ-5B
HB5B-04
4.2
18 JK
180 JL
0.45 JQK
0.97 JK
28 JK
11
72
110 JK
0.23 JH
¦\ 4 JQK
28
0.95 JQK
<2.2
<4.4
46
230 JL
BZ-5B
HB5B-05
3.6
JK
9.8
150 JL
0.29 JQK
0.77 JQK
22 JK
8.8
63
110 JK
0.18 JH
12 JQK
21
0.38 JQK
<2.3
<4.7
36
260 JL
T-14 (2 of 3)
-------
Central Metal SI Report
CAN00903324
September 2023
TABLES
Sample
Type
sub-BZ
Sample No.
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Mo
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
Re
sidential RSL
31
0.68
15,000
160
7.1
„<1>
23
3,100
400
11
390
1,500
390
390
0.78
390
23,000
ISM
BZ-5B
IB5B-01
3.3
JQK
14
130
0.20 JQK
.| -| JQK
19
8.2
62
86
0.12
-| 2 JQK
26
<9.3
<4.7
<9.3
30
180
BZ-5B
IB5B-02
3.5
JQK
14
130
0.20 JQK
.| -| JQK
19
7.6
62
87
0.16
.| 4 JQK
25
<9.2
<4.6
<9.2
28
180
BZ-5B
IB5B-03
2.7
JQK
15
130
0.20 JQK
.| -| JQK
21
7.9
60
94
0.15
.| 5 JQK
32
0.84 JQK
<4.7
<9.3
29
180
BZ-5B
IB5B-AV121
3.2
JQK
14
130
0.20 JQK
.| -| JQK
20
7.9
61
89
0.14
.| 4 JQK
28
0.84 JQK
<4.7
<9.3
29
180
4-PointComp.
BZ-5C
HB5C-01
1.0
JQK
8.3
110 JL
0.60 JQK
0.79 JK
19 JK
8.3
41
51 JK
0.13 JH
0.98 JQK
40
<3.2
0.39 JQK
2.0 JQK
38
140 JL
BZ-5C
HB5C-02
4.3
17
490 JL
0.44 JQK
0.87 JK
37 JK
9.2
62
130 JK
0.58 JH
2.4
33
0.95 JQK
<2.0
<4.0
39
270 JL
BZ-5C
HB5C-03
3.6
16
130 JL
0.44 JQK
0.48 JQK
25 JK
9.3
47
55 JK
0.092 JH
12 JQK
52
0.68 JQK
<2.1
<4.2
40
120 JL
BZ-5C
HB5C-04
3.1
13
130 JL
0.45 JQK
0.50 JQK
30 JK
10
50
38 JK
0.06 JK
2.0
52
<4.5
<2.2
<4.5
40
130 JL
BZ-5C
HB5C-05
3.3
19
130 JL
0.44 JQK
0.61 JQK
22 JK
9.4
48
62 JK
0.13 JK
1.3 JQK
25
0.56 JQK
<1.8
<3.7
41
140 JL
ISM
BZ-5C
IB5C-01
3.0
JQK
14
200
0.23 JQK
-| -| JQK
19
8.0
56
65
0.12
.| 5 JQK
28
<9.4
<4.7
<9.4
30
160
BZ-5C
IB5C-02
2.7
JQK
12
140
0.21 JQK
0.93 JQK
17
7.3
49
58
0.12
^ 2 JQK
23
<9.2
<4.6
<9.2
29
140
BZ-5C
IB5C-03
2.8
JQK
15
160
0.21 JQK
-| -| JQK
18
8.4
53
70
0.13
-j g JQK
27
<9.2
<4.6
<9.2
29
160
BZ-5C
IB5C-AV121
2.8
JQK
14
167
0.22 JQK
-j q JQK
18
7.9
53
64
0.12
-| 5 JQK
26
<9.4
<4.7
<9.4
29
153
Cudahy Road Verge Reference Area
4-Point Comp.
BZ-6A
HB6A-01
0.97
JQK
4.1
150 JK
0.60 JQK
1.1
24
8.7
49
180 JK
0.081
1.0 JQK
47
<3.5
<1.8
1.9 JQK
36
240
BZ-6A
HB6A-02
0.76
JQK
3.5
150 JK
0.48 JQK
1.2
23
7.1
38
170 JK
0.17
0.85 JQK
21
<3.7
<1.8
1.6 JQK
35
240
BZ-6A
HB6A-02(D|
0.58
JQK
3.6
140 JK
0.46 JQK
1.0
21
6.6
34
170 JK
0.20
0.78 JQK
21
<4.2
<2.1
1.8 JQK
33
230
BZ-6A
HB6A-03
0.38
JQK
6.2
140 JK
0.64 JQK
0.86 JQK
22
8.9
46
73 JK
0.39
12 JQK
20
<4.4
<2.2
2.6 JQK
37
270
BZ-6A
HB6A-04
0.48
JQK
3.5
130 JK
0.46 JQK
0.90 JQK
27
6.9
39
94 JK
0.080
0.89 JQK
45
<4.7
<2.3
15 JQK
35
200
BZ-6A
HB6A-05
0.43
JQK
3.4
120 JK
0.43 JQK
0.95
19
6.4
42
110 JK
0.11
1.0 JQK
53
<3.9
<1.9
15 JQK
30
190
ISM
BZ-6A
IB6A-01
1.3
JQK
4 Q JQK
140 JK
0 44 JQK
.| -| JQK
23 JK
7.1
45 JK
200 JK
0.21
-j q JQK
20 JK
<9.4
<4.7
2 2 JQK
31
240
BZ-6A
IB6A-02
1.2
JQK
4.3 JQK
150 JK
0.40 JQK
-j q JQK
22 JK
6.6
48 JK
200 JK
0.18
13 JQK
24 JK
<9.5
<4.7
^ 7 JQK
30
260
BZ-6A
IB6A-03
1.3
JQK
4 7 JQK
140 JK
0 42 JQK
.| -| JQK
21 JK
6.8
43 JK
180 JK
0.16
0.97 JQK
24 JK
<9.4
<4.7
13 JQK
30
250
BZ-6A
IB6A-AV121
1.3
JQK
4 6 JQK
143 JK
0 42 JQK
-| -| JQK
22 JK
6.8
45 JK
193 JK
0.18
-| -| JQK
23 JK
<9.5
<4.7
^ y JQK
30
250
all values are reported in mg/kg
Samples collected in OctoPer 2022
1 = an RSL for Total (i e , unspeciated) cnromium nas not Peen estaPlisned
2 = "-AV" Result is Arithmetic Mean of Primary (-01), Duplicate (-02), and Triplicate (-03) Sample Results
D = Field Duplicate Sample
J = Tne result is an estimated quantity
Q = Tne reported result is less tnan tne SQL
Definitions
ISM = incremental Sampling Metnodology
mg/kg = milligram per kilogram
MO = MolyPdenum
RSL = EPA Regional Screening Level (May 2023, THQ =1 0, Risk = 10-6)
BZ = Background Sampling Zone
SQL = Sample Quantitation Limit
<## = Anal>te net detected at or aPove indicated Sample Quantitation Limit (SQL)
T-14 (3 of 3)
-------
Central Metal SI Report
September 2023
CAN000903324 TABLES
Table 15: Bulletin 104 Aquifer Elevations near Site
Aquifer
Estimated Elevation
(ft amsl)
Estimated Depth
(ft-bgs)
Top
Base
Top
Base
Gaspur
45
-5
95
145
Exposition
-25
-90
165
230
Gage
-155
-220
295
360
Hollydale
-320
-365
460
505
Lynwood
-480
-575
620
715
Silverado
-640
-775
780
915
Sunnyside
-1020
-1320
1160
1460
Definitions:
amsl = above mean sea level
bgs = below ground surface
ft = feet
Reference:
DWR, 1961
T-15 (1 of 1)
-------
Central Metal SI Report
September 2023
CAN000903324 TABLES
Table 16: Water Purveyors Operating Active Wells Within the Target Distance Limit
Water Company Name
No. of Wells in
System(1)
Total Population
Served<2)
No. of Wells
Within
4 Miles(1)
Golden State Water Co. - Florence/Graham
7
62,970
7
City of South Gate
8
76,443
8
City of Huntington Park
5
15,275
5
Walnut Park Mutual Water Company
3
16,180
3
Golden State Water Co. - Bell, Bell Gardens
6
54,309
4
Los Angeles Dept. of Water and Power
44
3,868,811
4
City of Lynwood
5
66,967
5
Tract 349 Mutual Water Company
2
3,132
2
PWC (Liberty) - Lynwood
2
24,171
1
PWC (Liberty) - Compton
2
23,802
1
City of Compton
6
74,877
3
Golden State Water Co. - Willowbrook
2
10,615
2
Lynwood Park Mutual Water Company
3
2,300
3
Maywood Mutual Water Company #1
2
5,500
2
May wood Mutual Water Company #2
2
6,349
2
Maywood Mutual Water Company #3
3
9,500
3
Golden State Water Co. - Southwest
13
275,369
2
Tract 180 Mutual Water Company
2
14,000
2
City of Vernon - no standby
8
28,000
8
Sativa-LA County Water District
2
4,385
2
Notes:
1 = Does not include standby wells unless otherwise noted
2 = Includes population served by water sources other than groundwater (e.g., imported surface water)
Reference:
Weston, 2023
T-16 (1 of 1)
-------
Central Metal SI Report
CAN000903324
September 2023
FIGURES
FIGURES
F-i
-------
CALIFORNIA
NEVADA
SANTA MONICA
POMONA
Sivi
Francisco
LOS ANGELES.COUNTY
Montebello
Beverly Hills
*Los Angeles
/L East Los Anoel
Commerce
Monica
Irigiewood
B^yvney
May wood
Pico.Rr
Huntington
Park
Torrance
8201 Santa Fe Ave,
Huntington Park, CA
Legend
^ Central Metal Site Location
111 Site Inspection (SI) Project Area
Bell Gardens
South
G ale
FIGURE 1
SITE LOCATION MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Downey
Lynvvood
CENTURY FWY_
,GLINN M ANDERSON FREEWAY AND TRANSIT
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
CENTURY FWY
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
Beverly Hills
East Los Annel-
(~aliforni
Iriglewood
Downey
Grand
Torrance
Legend
V//A Central Metal Site Boundary
~ Background Sampling Subzone
I I Residential Sampling Subzone
Residential Sampling Zones
Florence-Firestone Sampling
Zone
Walnut Park Sampling Zone
Metro-
Firestone
Ardmore
FIGURE 2
PROJECT AREA MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
L-durel
Firestone
Prepared For
U.S. Environmental
Protection Agency, Region 9
nwood PI
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
Stanford Av
Elementary
XI
_>
CO
0)
+-"
c
o
E
cc
Nadeau St
0)
3
o
D
r+
(D
E
<
Q_
E 84th St
E 85th St
42
E 92nd St
-------
Legend
17Jj Parcel Boundary
V/ Former Railroad Area (FRA)
\ > Former Tank Manufacturing
v Area (FTMA)
Residential Sampling Subzone
Residential Sampling Zones
Florence-Firestone Sampling
Zone
Walnut Park Sampling Zone
Notes:
Imagery Source: NearMap 8/27/2023
FIGURE 3
PARCEL LAYOUT MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
WESTON Task Order:
12767.900.004.2000.02
-------
Former Stormwater
Treatment System
Main Office
Former Warehouse Extension
and Foundry Area
Warehouse
HWSA
ptorrnwatej
[Treatment
\ System.
FIGURE 4
SITE LAYOUT MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
Maintenance
Shop
Legend
Existing Site Structure
Historical Site Feature
Residential Sampling Subzone
Central Metal Site Boundary
Notes:
Imagery Source: NearMap 8/27/2023
WESTON Task Order:
12767.900.004.2000.02
EPA ID No.:
CAN000903324
-------
DMS-SV-6
No Wells Installed
No Deep
Well Installed
DfWf'
Residential EPA VISLs:
Commercial EPA VISLs:
Legend
a Existing Site Structure
I I Central Metal Site Boundary
» I Residential Sampling Sutazone
o Soil Vapor Probe Location
Notes:
- Bold and Underlined values indicate results
that exceed Resident VISL
- All units in micrograms per cubic meter (|jg/m3)
- Samples collected in April 2019
- imagery Source: NearMap 8/27/2023
Definitions:
CCI4 = Carbon Tetrachloride
ft-bgs = feet below ground surface
ND = Not Detected above Reporting Limit
PCE = Tetrachloroethylene
VISL = EPA Vapor Intrusion Screening Level
©
a f™1 200
FIGURE 5
STAGE 1 - SELECT SOIL VAPOR
RESULTS
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared Fof
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, inc.
Concord. CA 94520
September 2023
8*1!
EPA ID No,
CANDCW90J-324
WESTON Task Order:
12767 900 0042000.02
-------
SV-2
2 ft-bgs:
Arsenic = 2.7
Lead = 14
70 ft-bgs:
Arsenic = 0.89
Lead = 1.5
SV-3
2
Arsenic = 2.5
Lead = 7.5
10 ft-bgs:
Arsenic = 0.97
Lead = 1.3
SV-1
2 ft-bgs:
Arsenic = 3.3
Lead = 8.0
10 ft-bgs:
Arsenic = 0.83
Lead = 1.6
2 ft-bgs:
Arsenic = 8.3
Lead = 338
10 ft-bgs: -
SV-5
2 ft-bgs:
Arsenic = 3.1
Lead = 7.1
10 ft-bgs:
Arsenic = 0.76
Lead = 1.3
SV-9
2 ft-bgs:
Arsenic = 7.7
Lead = 196J
10 ft-bgs:
Arsenic =1.1
Lead = 1.7 J
2 ft-bgs:
Arsenic = 1.9
Lead = 4.0 J
10 ft-bgs:
Arsenic = 1.2
Lead = 1.5 ¦'
2 ft-bgs:
Arsenic = 7.0
Lead = 68 J
10 ft-bgs:
Arsenic = 2.0
Lead = 2.5 J
2 ft-bgs:
Arsenic =14
Lead = 19 J
10 ft-bgs: -
TTTW^T
O" J;"'"
pppffc'"-rir
2 ft-bgs:
Arsenic = 3.8
Lead = 6.1 J
10 ft-bgs:
Arsenic = 1.3
Lead = 1.5 J
USEPA RSLs:
Resident Soil:
Arsenic = 0.68
Lead = 400
Industrial Soil:
Arsenic = 3.0
Lead = 800
SV-20
2 ft-bgs:
Arsenic = 2.0
Lead = 6.3 J
10 ft-bgs:
Arsenic = 1.2
Lead = 1.4 J
SV-4
2 ft-bgs:
Arsenic = 2.6
Lead = 5.5
10 ft-bgs:
Arsenic = 1.0
Lead = 1.4
SV-7
2 ft-bgs:
Arsenic = 2.3
Lead = 27
10 ft-bgs:
Arsenic =1.1
Lead = 6.5
SV-8
2 ft-bgs:
Arsenic = 3.2
Lead = 31
10 ft-bgs:
Arsenic = 0.44
Lead = 1.0 J
2 ft-bgs:
Arsenic = 2.7
Lead = 16 J
10 ft-bgs:
Arsenic = 0.65
Lead = 1.4 J
SV-14
2 ft-bgs:
Arsenic = 2.3
Lead = 4.6 J
10 ft-bgs:
Arsenic = 0.75
Lead = 1.0 J
2 ft-bgs:
Arsenic = 2.6
Lead = 4.3 J
10 ft-bgs:
Arsenic = 0.64
Lead = 1.3 J
2 ft-bgs:
Arsenic = 5.5
Lead = 301 J
10 ft-bgs:
Arsenic = 0.96
Lead = 2.0 J
2 ft-bgs:
Arsenic = 3.0
Lead = 170 J
10 ft-bgs:
Arsenic = 1.2
Lead = 2.2 J
2 ft-bgs:
Arsenic = 5.4
Lead = 90 J
10 ft-bgs:
Arsenic = 0.74
Lead = 2.0 J
Legend
a Existing Site Structure
I I Central Metal Site Boundary
I I Residential Sampling Sutazone
o Soil Sample Location
Notes:
-All units in milligrams per kilogram (mg/kg)
- Samples collected in April 2019
- Imagery Source: NearMap 8/27/2023
Definitions:
ft-bgs = feet below ground surface
RSL = Regional Screening Level
Qualifiers:
J = estimated result
e
FIGURE 6
STAGE 1 - SELECT SOIL RESULTS
Central Metal
Sile Inspection Report
Huntington Park. Los Angeles County, CA
Prepared Fof
U.S. Environme
Protection Agency, Region 9
Prepared By
Weston Solutions, inc.
Concord. CA 94520
September 2023
8*1!
EPA ID No,
CANDCW90J-324
WESTON Task Order:
12767.900 004.2000.02
-------
DP-8
2 ft-bgs:
Arsenic = 5.3
Lead = 49
5 ft-bgs:
Arsenic = 7.8
Lead = 6.8 J
10 ft-bgs:
Arsenic = 2.3
Lead = 1.9
15 ft-bgs:
Arsenic = 4.1
Lead = 3.8
2 ft-bgs:
Arsenic = 2.6 J
Lead = 8.5 J
5 ft-bgs:
Arsenic = 2.1 J
Lead = 3.2 J
10 ft-bgs:
Arsenic = 0.74
Lead = 1.3 J
15 ft-bgs:
Arsenic = 3.4 J
Lead = 5.1 J
DP-S
2 ft-bgs:
Arsenic = 3.1
Lead = 4.9 -
5 ft-bgs:
Arsenic = 1.4
Lead = 2.4 J
10 ft-bgs:
Arsenic = 2.2
Lead = 1.4 J
15 ft-bgs:
Arsenic = 4.7
Lead = 6.6 J
DP-3
2 ft-bgs:
Arsenic = 3.4
Lead = 29 J
5 ft-bgs:
Arsenic = 2.5
Lead = 6.2 J
10 ft-bgs:
Arsenic = 1.6
Lead = 2.3 J
15 ft-bgs:
Arsenic = 3.6
Lead = 4.6 -
DP-6
2 ft-bgs:
Arsenic = 4.9
Lead - 5.0
5 ft-bgs:
Arsenic = 2.4
Lead = 1.9
10 ft-bgs:
Arsenic = 1.7
Lead = 1.1
15 ft-bgs:
Arsenic = 6.8
Lead = 3.0
DP-4
2 ft-bgs:
Arsenic = 6.0
Lead = 203
5 ft-bgs:
Arsenic = 4.0
Lead = 4.0
10 ft-bgs:
Arsenic = 1.8
Lead = 1.8
15 ft-bgs:
Arsenic = 2.9
Lead = 2.1
DP-1
2 ft-bgs:
Arsenic = 9.6
Lead = 138
5 ft-bgs:
Arsenic = 2.7
Lead = 2.0
10 ft-bgs P<;
Arsenic = 2.4
Lead = 1.9
15 ft-bgs:
Arsenic = 4.9
Lead = 7.7
DP-2
2 ft-bgs:
Arsenic = 3.5
Lead = 138
5 ft-bgs:
Arsenic = 4.9
Lead = 13
10 ft-bgs:
Arsenic = 2.3
Lead = 1.7
15 ft-bgs:
Arsenic = 2.2
Lead = 1.9
DP-9
2 ft-bgs:
Arsenic = 14 -
Lead = 152
5 ft-bgs:
Arsenic = 6.4
Lead = 15
10 ft-bgs:
Arsenic = 2.1
Lead = 1.6
15 ft-bgs:
Arsenic = 2.4
Lead = 2.2
DP-7
2 ft-bgs:
Arsenic = 8.3
Lead = 612
5 ft-bgs:
Arsenic = 2.6
Lead = 2.1
10 ft-bgs:
Arsenic = 2.2
Lead = 1.6
15 ft-bgs:
Arsenic = 2.8
Lead = 2.6
USEPA RSLs:
Resident Soil:
Arsenic = 0.68
Lead = 400
Industrial Soil:
Arsenic = 3.0
Lead = 800
Legend
a Existing Site Structure
I I Central Metal Site Boundary
I I Residential Sampling Sutazone
o Soil Sample Location
Notes:
- All units in milligrams per kilogram (mg/kg)
- Samples collected in June 2019
- Imagery Source: NearMap 8/27/2023
Definitions:
ft-bgs = feet below ground surface
RSL = Regional Screening Level
Qualifiers:
J = estimated result
e
FIGURE 7
STAGE 2 - SELECT SOIL RESULTS
Central Metal
Site Inspection Report
Huntington Parit, Los Angeles County, CA
Prepared Fof
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord. CA94520
September 2023
EPA ID NO,
CANOOOUOS-324
WESTON Task Order:
12767 900 0042000.02
-------
97 ft-bgs:
trans-1,2-DCE = 0.12
ICE = 0.21 J
rgjp-"";»'"r
» Fff n B-'-1''v
T'f
WfW r'f
"ci-fFr-r#*!
101 ft-bgs: —_
trans-1,2-DCE = ND
ICE = ND
prgifM
¦¦ ¦ - ni»«: t. •
CPT-3
94 ft-bgs:
trans-1,2-DCE = ND
TCE = ND
98 ft-bgs:
trans-1,2-DCE = ND
TCE = ND
Legend
a Existing Site Structure
I I Central Metal Site Boundary
I I Residential Sampling Sutazone
o Groundwater Sample Location
Notes:
- All units in micrograms per kilogram (pg/kg)
- Samples collected in June 2019
- Imagery Source: NearMap 8/27/2023
Definitions:
DCE = Dichloroethylene
ft-bgs = feet below ground surface
ND = Not Detected above reporting limit
TCE = Trichloroethylene
Qualifiers:
J = estimated result
e
200
FIGURE 8
STAGE 2 - SELECT
GROUNDWATER RESULTS
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared Pot
U.S. Environmental r A
Protection Agency, Region 0 \wi
Prepared By
Weston Solutions, Inc.
Concord. CA 94520
September 2023
8*1!
EPA ID NO,
CANPUJ90J-324
WESTON Task Order:
12767.900 004.2000.02
-------
.l j4i.iiiuyuL.aui.,.
RZ4a
IR'ZM
Hawthorn* Hunt AP California
Latlti
lIBH3
Li
Legend
h 1 Residential Sampling Subzone
ll! I Central Metal Site Boundary
Historical Debris Pile
Residential Sampling Zones
Florence-Firestone Sampling
Zone
Walnut Park Sampling Zone
Notes:
imagery Source; NearMap 8/27/2023
FIGURE 9
STAGE 3 - RESIDENTIAL
NEIGHBORHOOD LAYOUT MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
IA
Legend
V//A Central Metal Site Boundary
] Sampled Residential Parcel
Residential Sampling Subzone
Residential Sampling Zones
Florence-Firestone Sampling
Zone
Walnut Park Sampling Zone
Notes:
©
Feet
500
FIGURE 10
STAGE 3 RESIDENTIAL SAMPLED
PROPERTY LAYOUT
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
Parks
Roosevelt Park
CM-BZ-1A
75 mg/kg
70 mg/kg
WPPP
CM-BZ-2A
95 mg/kg
Washington Park
CM-BZ-5A
77 mg/kg
CM-BZ-5B
89 mg/kg
CM-BZ-5C
64 mg/kg
CM-BZ-2A
95 mg/kg
CM-BZ-5
77 mg/kg
CM Parks
81 mg/kg
All BZs
134 mg/kg
3 x Background
401 mg/kg
Road Verges
Garden View
CM-BZ-3
183 mg/kg
Road BZs
186 mg/kg
CM-BZ-4
189 mg/kg
CM-BZ-3A
183 mg/kg
CM-BZ-3B
193 mg/kg
CM-BZ-3C
173 mg/kg
South Gate
CM-BZ-4A
167 mg/kg
CM-BZ4B
183 mg/kg
CM-BZ-4C
217 mg/kg
Notes:
1) All results in mg/kg (milligrams per kilogram)
2) BZ = Background Zone
3) HRS = Hazard Ranking System
FIGURE 11
METHODOLOGY FOR
DETERMINING HRS SCREENING
BENCHMARKS
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
IA
Legend
\///\ Central Metal Site Boundary
Residential Sampling Subzone
Residential Sampling Zones
¦ 1 Florence-Firestone Sampling
' ' Zone
Walnut Park Sampling Zone
Residential Property Lead Results
~ No Lead Exceedance
Exceeded Lead HRS Soil Screening
Benchmark (401 mg/kg)
Notes:
1) All results in mg/kg (milligrams per kilogram)
2) ISM average lead results in blue
3) HRS = Hazard Ranking System
©
Feet
500
FIGURE 12
STAGE 3 RESIDENTIAL SAMPLED
PROPERTY LEAD RESULTS
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
IA
Legend
Former Central Metal Site
Boundary
Residential Sampling Subzone
Residential Sampling Zones
¦ 1 Florence-Firestone Sampling
' ' Zone
Walnut Park Sampling Zone
Residential Property Arsenic
Results
~ No Arsenic Exceedance
I 1 Exceeded Arsenic HRS Soil Screening
' ' Benchmark (22 mg/kg)
Notes:
1) All results in mg/kg (milligrams per kilogram)
2) ISM average lead results in blue
3) HRS = Hazard Ranking System
4) J = Estimated
©
Feet
500
FIGURE 13
STAGE 3 RESIDENTIAL SAMPLED
PROPERTY ARSENIC RESULTS
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
HBlb-03
HBla-05
Arsenic: 4.0
Lead: 32
Arsenic: 4.0
Lead: 33 j
HBla-03
Arsenic: 4,7
Lead: 120
T >
. in'
' * m
OUjJ
HBlb-05
Arsenic: 3.3
Lead: 710
HBla-04
Arsenic: 5.3
Lead: 160
Franklin D.
Roosevelt Park
HBla-02
Arsenic: 3.7
Lead: 22
_
HBlc-05
Arsenic: 4.7
Lead: 61 J
HBlc-04
HBlc-03
Arsenic: 3.5
Lead: 28 J
Arsenic: 3.7
Lead: 140 J
/ Lead: 140.
C 11
ISM Subzone: BZlc
HBlc-02
Arsenic: 3.9 mg/kg
Lead: 69 mg/kg
Pll tor
Arsenic: 3.7
Lead: 100
HBlc-Ol
Arsenic: 3.1
Lead: 34
_
HBla-Ol
Arsenic: 4.4|
Lead: 39
ISM Subzone: BZ1
Arsenic: 4.1 mg/kg
Lead: 75 mg/kg
La
psp
(| H
8
s
MIK"
i
M
if.
8
fL
u
J5'f
4
• * ^
3
I miAthr
Legend
o 4-PC Soil Sampling Location
Central Metal Site Boundary
Background Sampling Subzones
Park Boundaries
Notes:
1) 4-PC = Four-Point Composite
2) All results in mg/kg (milligrams per kilogram)
3) J = Estimated
FIGURE 14
STAGE 3 - BZ1
SAMPLING RESULTS FOR
ARSENIC AND LEAD
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
w
sW.
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
HBlb-01
Arsenic: 4.2|-
Lead: 56
Arsenic: 4.6|-
Lead: 60
lHBlb-04
Arsenic: 3.5
Lead: 29
Arsenic: 3.7 (Duplicate))
Lead: 30 (Duplicate)
lHBlb-02
|Arsenic: 6.1
Lead: 270
ilISM Subzone: BZlb
^TsenicTJ-3.7 mg/kg
Lead: 69 mg/kg
-------
ISM Subzone: BZ2a
HB2a-02
B T Ih! Ml f" ill
Lead: 95 mg/kg
1 S *' P Tnf . ^ C3?
— *¦™* -y ¦' —
HB2a-05
Arsenic
6.4
Lead
200.]
HB2a-03
Arsenic: 3.8
Lead: 90 J
- jmBSSBwrrt-ek.
HB2a-04
Arsenic: 18
Lead: 140 J
r-
- Ml
IIR
HB2a-01
Arsenic
4.1
Lead
40 J
Arsenic: 6.1
Lead: 93 J
Legend
o 4-PC Soil Sampling Location
I I Central Metal Site Boundary
Background Sampling Subzones
If^Hl Residential Sampling Subzones
Notes:
1) 4-PC = Four-Point Composite
2) All results iri mg/kg (milligrams per kilogram)
3) J = Estimated
FIGURE 15
STAGE 3 - BZ2
SAMPLING RESULTS FOR
ARSENIC AND LEAD
Central Metal
Site Inspection Report
Huntington Park. Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.: WESTON Task Order:
CAN000903324 12767.900.004.2000.02
-------
HB3b-04
HB3c-03
Arsenic: 2.4 J
Lead: 170 J
HB3a-03
HB3b-03
Arsenic: 8.6
Lead: 79 J
Arsenic: 6.3
Lead: 160
Arsenic: 18
Arsenic: 15 (Duplicate)
Lead: 220 J
Lead: 180 J (Duplicate)
HB3c-04
Arsenic: 4.7
Lead: 140 J
HB3a-04
HB3c-02
Arsenic: 2.9
Lead: 130
Arsenic: 4.5
Lead: 160 J
HB3b-02
(Arsenic: 40.0
I Lead: 160 J
HB3a-02
HB3c-05
Arsenic: 4.3
Lead: 230
Arsenic: 4.8
Lead: 170 J
HB3a-05
Arsenic: 8.7
Lead: 120
HB3b-05
Arsenic: 4.9
Lead: 140 J
HB3c-01
Arsenic: 2.7
Lead: 99 J
HB3b-Ql
Arsenic: 220
Lead: 1,600 J
HB3a-01
ISM Subzone: BZ3c
Arsenic: 4.4 mg/kg
Lead: 173 mg/kg
[Arsenic: 3.9
Lead: 190
ISM Subzone: BZ3b
Arsenic: 14 mg/kg
Lead: 193 mg/kg
ISM Subzone: BZ3a
Arsenic: 6.6 mg/kg
Lead: 183 mg/kg
Legend
o 4-PC Soil Sampling Location
Central Metal Site Boundary
Background Sampling Subzones
Notes:
1) 4-PC = Four-Point Composite
2) All results iri mg/kg (milligrams per kilogram)
3) J = Estimated
FIGURE 16
STAGE 3 - BZ3
SAMPLING RESULTS FOR
ARSENIC AND LEAD
Central Metal
Site Inspection Report
Huntington Park. Los Angeles County. CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
w
sW.
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
HB4b-03
HB4b-02
»v y
it!
HB4a-02
Arsenic: 6.1
Arsenic: 6.5 (Duplicate)
Lead: 380 J
Lead: 370 J (Duplicate)
HB4c-Q3
Arsenic: 5,4
Lead: 200 J
HB4a-03
HB4C-04
Arsenic: 2.8
Lead: 120 J
Arsenic: 6.4
Lead: 140 J
Arsenic: 55
Lead: 560 J
HB4b-04
Arsenic: 6.9
Lead: 120 J
HB4c-02
Arsenic: 3.2
Lead: 180 J
HB4a-01
Arsenic: 6.4
Lead: 170 J
Arsenic: 4.3
Lead: 200 J
HB4a-04
HB4C-05
Arsenic: 5.7
Lead: 120 J
Arsenic: 4.8
Arsenic: 6.2 (Duplicate)
Lead: 130 J
Lead: 150 J (Duplicate)
IHB4b-05
—Arsenic: 4.6
Lead: 130 J
HB4C-01
HB4b-01
Arsenic: 3.5
Lead: 100 J
Arsenic: 5.1
Ju /
ISM Subzoiie: BZ4c
Ls CM Arsenic: 4.4 mg/kg
Lead: 217 mg/kg jC
HB4a-G5
Arsenic: 5.0
Lead: 160 J
' : Ki r S Urn ir
ISM Subzone: BZ4b
Arsenic: 5.3 mg/kg H
Lead: 183 mg/kg An
;—. / m
11MB
ISM Subzone: BZ4c
Arsenic: 7.7 mg/kg
Lread: 167 mg/kg
Legend
o 4-PC Soil Sampling Location
1 | Central Metal Site Boundary
Background Sampling Subzones
Notes:
1) 4-PC = Four-Point Composite
2) All results iri mg/kg (milligrams per kilogram)
3) J = Estimated
FIGURE 17
STAGE 3 - BZ4
SAMPLING RESULTS FOR
ARSENIC AND LEAD
Central Metal
Site Inspection Report
Huntington Park. Los Angeles County. CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
w
sW.
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
-------
r-.
W'-i '
jm if~ »¦» * 4k1 1
a* f;
v £i,*
if /T
~ijH
¦
¦ • • ' ¦¦
05®, li. jm: UiJtf F 3Jl.. IIJHi
S*
IMi >
HI
S teJr
I Hi n
jW^Jr r £
t f' ¦ ¦ "ifc Hi TOM
C5 v-
C I
ft !
Ttr't «»
W
x ¦ —II -I# 1
91 i
re », JB&a
SSk«a®»
K.
336
tts
U
•*17^ "Ffc
I M'
«iArviii
I* Rais NiiMl K«l
f'
li»v -f I
lr
!
I
r.. s is £ ¦, '
nr I
"5*
•Sfc^ ¦ 5 ^ f.
w . '>MlUBr -iSai- Hi 4.r *. r « [
*ffr» i_r i" at—-:
tfC
P
I 3#** ri
®ES* a^u,
^•r.r ,4
IVvv
f tj[
fc-
'r
ill
1 u.
tA'iHwl
1'"''''"
IKS ' ' .
! - wisnrMslk,;*
hn hi si jr ¦
Notes:
1) 4-PC = Four-Point Composite
2) All results iri mg/kg (milligrams per kilogram)
3) J = Estimated
31'
1k
©
Feet
350
m iZSi.i* » ::&Jd$ri
BI
i
s*»
. »> i
11
. r » s iciafc
n- m
if !
F~
— .
ill
i :: ^
jls?4*;;
-V , r j V
FIGURE 18
STAGE 3 - BZ5
SAMPLING RESULTS FOR
ARSENIC AND LEAD
Central Metal
Site Inspection Report
Huntington Park. Los Angeles County. CA
M Jfl
IS. jjfe
lrifcai f
s jpr;r#:. i*#1-
i • ' ' X *.«<£> J 3 7_L_LIlv
:
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
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Hill St
Florence-Fin
Nadeau St
E 76th PI
Nadeau
E 77th St
E 78th St
84th St
85th St
E 83rd St
E 84th St
E 85th St
E 81 st i>t
E 83rd
Metro-Firestone
E 87th St
E 92nd St
88th St
E 92nd St
ar pi
Wainut St
California St
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Walnut Park
0
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Grs"d Ave
O/ive St
Br°adway
Ct'dahy St
Liberty Blvd
5;
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-
H'll St
Santa Ana St
L/faerty Bivd
Ardrnore Ave
Laurel p/
¦'"estone Bird
Willow PI
G/enwood p/
Los Angeles
;V~ '/^JEast Los-Angel
Post <
(1/
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00
South
ern Ave
Stanford Av
Elementary
^everlyRi's^y^
Legend
IXXZ1 Central Metal Site Boundary
~ Background Sampling Subzone
1" II Residential Sampling Subzone
Residential Sampling Zones
Florence-Firestone Sampling
Zone
Walnut Park Sampling Zone
Proximate Industrial Facility
©
Feet
1,400
FIGURE 20
PROXIMATE INDUSTRIAL
FACILITIES MAP
Central Metal
Site Inspection Report
Huntington Park, Los Angeles County, CA
Prepared For
U.S. Environmental
Protection Agency, Region 9
Prepared By
Weston Solutions, Inc.
Concord, CA 94520
September 2023
EPA ID No.:
CAN000903324
WESTON Task Order:
12767.900.004.2000.02
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Central Metal SI Report September 2023
CAN000903324 APPENDICES
APPENDICES
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Central Metal SI Report
CAN000903324
September 2023
APPENDICES
APPENDIX A
ACRONYMS AND ABBREVIATIONS
A-i
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Central Metal SI Report
September 2023
CAN000903324 APPENDICES
%
percent
>
greater than
Hg/L
microgram per liter
|ig/m3
microgram per cubic meter
AOC
area of observed soil contamination
AQMD
Air Quality Management District
BDCM
bromodichloromethane
Bonner
Bonner Analytical Testing Co.
BZ
background sampling zone
CERCLA
Comprehensive Environmental Response, Compensation, and Liability Act of 1980
CLP AS
Contract Laboratory Program Analytical Services
CLRRA
California Land Reuse and Revitalization Act
CMI
Central Metal, Inc.
CPT
Cone Penetrating Testing
CUPA
Certified Unified Program Agency
CVAA
Cold Vapor Atomic Absorption
CWD
County Water District
DCE
dichloroethylene
DMS
Damille Metal Supply Inc.
DP
direct-push
DTSC
Department of Toxic Substance Control
DWP
Department of Water and Power
EJ
Environmental Justice
EPA
U.S. Environmental Protection Agency
e-waste
electronic waste
FRA
former railroad area
ft
feet (foot)
ft2
feet squared (foot squared)
FTMA
former tank manufacturing area
GSWC
Golden State Water Company
HHMD
Health Hazardous Materials Division
HRS
Hazard Ranking System
HWSA
hazardous waste storage area
ICP-MS
Inductively Coupled Plasma Mass Spectrometry
A-l
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Central Metal SI Report
September 2023
CAN000903324 APPENDICES
ICP-AES
Inductively Coupled Plasma Atomic Emission Spectroscopy
ID
Identification
ISM
Incremental Sampling Methodology
ITRC
Interstate Technology Regulatory Council
MCL
Maximum Contaminant Level
mg/kg
milligram per kilogram
mg/L
milligram per liter
MWC
mutual water company
NAICS
The North American Industry Classification System
National Tank
National Tank & Manufacturing Company
NCP
National Contingency Plan
NOV
Notice of Violation
NPL
National Priorities List
PA
Preliminary Assessment
PCE
tetrachloroethylene
PID
photo ionization detector
ppm
parts per million
QA
quality assurance
RCRAInfo
Resource Conservation and Recovery Act Information
RSL
regional screening levels
RWQCB
Regional Water Quality Control Board
RZ
residential sampling zone
SAG
Slauson-Alameda-Gage
SAP
Sampling and Analysis Plan
SEMS
Superfund Enterprise Management System
SI
Site Inspection
SPRR
Southern Pacific Railroad
SQL
Sample Quantification Limit
STLC
Soluble Threshold Limit Concentration
Sub-BZ
background sampling subzone
Sub-RZ
residential sampling subzone
TCE
trichloroethylene
TCLP
Toxicity Characteristic Leaching Procedure
TDL
target distance limit
A-2
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Central Metal SI Report
September 2023
CAN000903324 APPENDICES
TPH
total petroleum hydrocarbons
trans-1,2 DCE
trans I, 2-dichloroethylene
U.S.
United States
USACE
United States Army Corps of Engineers
VISL
vapor intrusion screening level
voc
volatile organic compound
WPPP
Walnut Park Pocket Park
WESTON®
Weston Solutions, Inc.
A-3
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Central Metal SI Report
CAN000903324
September 2023
APPENDICES
APPENDIX B
REMOVAL EVALUATION CONSIDERATIONS
B-i
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Central Metal SI Report
September 2023
CAN000903324
APPENDICES
Appendix B
National Contingency Plan Removal Evaluation Considerations
If the answer to question 1 is "No", or if the answer to any question of 2 through 8 is, '"Yes", the
site is ineligible for CERCLA evaluation and the decision at the bottom of this page is "No
Further Action Under CERCLA". A "yes" answers to questions 9 through 16 identifies sites that
may not be appropriate for CERCLA evaluation without further justification. If a
question cannot be answered, explain why in the Comments section below.
1.
Has a release of hazardous substances, pollutants, or contaminants
occurred?
1 1 Unknown 1X1 Yes
~
No
2.
Docs the release or threat of release consist only of crude oil or
unaltered petroleum product'.'
I | Yes
m
No
3.
Is the site subject to corrective action under RCRA Subtitle C
(hazardous waste treatment, storage, or disposal facility)?
| | Yes
X
No
4.
Does the release or threatened release fall under the jurisdiction of
the Uranium Mill Tailings Radiation Control Act (UMTRCA)?
I | Yes
X
No
5.
Does the release or threatened release fall under the jurisdiction of
the Atomic Energy Act (AEA)?
| | Yes
X
No
6.
Is the release or threatened release a result of a legal application of
pesticides under Federal Insecticide. Fungicide, and Rodenticide Act
(FIFRA)?
I | Yes
X
No
7.
Is the release or threatened release regulated under the Oil Pollution
Act (OPA)?
| | Yes
X
No
8.
Is the release or threatened release permitted under the Nuclear
Regulatory Commission (NRC)?
| | Yes
X
No
9.
Is the site a federal facility?
| | Yes
X
No
10.
Is the site outside of U.S. boundaries?
I ] Yes
X
No
11.
Is the site outside of EP A. Region IX borders?
f-1 Yes
X
No
12.
Is the site within Native American Tribal lands'.'
| | Yes
X
No
13.
Is the site currently under the control and management of a
state/local agency'.' If yes, which agencies'.' Describe below.
1 1 Yes
X
No
14.
Is the site currently operating'.'
1 1 Yes
1X1
No
15.
Is the site address valid'.'
ElYes
~
No
16.
Has the site been investigated under an alias?
1 1 Yes
El
No
Comments:
B-l
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Central Metal SI Report
CAN000903324
September 2023
APPENDICES
APPENDIX C
SITE RECONNAISSANCE INTERVIEW AND OBSERVATION REPORT/
PHOTOGRAPHIC DOCUMENTATION
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Central Metal SI Report
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CAN000903324 APPENDICES
SITE RECONNAISSANCE INTERVIEW AND OBSERVATIONS
REPORT/PHOTOGRAPHIC DOCUMENTATION
DATES: April 8 - April 11, 2019 and June 17-20, 2019.
OBSERVATIONS MADE BY: Brian P. Reilly, Weston Solutions, Inc. (WESTON)
SITE: Central Metal (formerly Damille Metals SVC)
EPA ID: CAN000903324
The following information was obtained primarily during the Site Inspection (SI)
sampling efforts, which include the Stage 1 effort in April 2019 and the Stage 2 effort in
June 2019:
The site was located in a mixed industrial and residential area of unincorporated southern
Los Angeles County, immediately southwest of the city of Huntington Park. The site was
signed with the address of 8201 Santa Fe Avenue. The site appeared to be entirely
enclosed behind a combined corrugated metal and chain link fence.
The site was bordered to the north and west by industrial businesses;; to the south by an
industrial recycling business; and to the east by commercial businesses and residential
buildings. The southeastern portion of the site is bordered directly to the northeast by
single-family homes.
During the SI sampling events, the site was generally divided into two operational areas
including the main warehouse-type building and office building portion of the site to the
east, and the mostly vacant portion of the site to the west. A generally northwest-
southeast trending fence divided the two portions of the site.
The facility was occupied by three primary structures including a large warehouse
building at the east-central portion of the site, a single-story office building at the
northeastern corner of the site, and a stormwater treatment system at the southwestern
corner of the site. The warehouse building including several smaller sub-areas within
including a hazardous waste storage area and a maintenance shop at the southern portion
and an aboveground storage tank area at the northern portion.
In addition to the permanent structures, numerous large industrial scrap metal machines,
presumably metal sorters and crushers) were located on the facility, primarily at the
north-central area, the southwestern area, and the central area, immediately west of the
large warehouse building. Several excavators equipped with 'claws' were also located
across the facility. Several large debris piles were observed on the facility during the
events, primarily in the area immediately west of the large warehouse building.
During the Stage 2 event, approximately two dozen large roll-off bins were observed
being stored under cover within the large warehouse building. The bins were of varying
types and sizes and were generally covered by tarps. Placards affixed to some of the bins
indicated that the contained materials were classified as a California hazardous waste
based on concentrations of arsenic, lead, and cadmium.
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Central Metal SI Report
September 2023
CAN000903324 APPENDICES
The site appeared to be entirely fenced and inaccessible to the public. The main entrance
gates were located at the northeastern portion of the site, immediately west of and
immediately south of the main office building. The surface of the site appeared to be
entirely covered in pavement or buildings. During the Stage 1 and 2 sampling events, the
concrete slab, or slabs in some areas, were found to vary from about 18 to 48 inches in
thickness. No apparent sensitive environments, such as wetlands, were observed on site.
No schools, daycares, or residential buildings were observed within the bounds of the
facility. No stormwater drains were observed on the site and surface water from the site
likely flows from paved areas of the site into the municipal stormwater drains located
along Santa Fe Avenue (east) and Short Street (north) and/or into the subgrade Alameda
Corridor railway (west). No evidence of commercial agriculture, commercial silviculture,
commercial livestock production, or commercial livestock grazing were observed on site.
During the events, the only employees that appeared to regularly work at the facility
included one or two administrative assistants in the office building and between 5 and 10
general maintenance workers across the facility. None of the major equipment at the site
was observed being used and the on-site workers appeared to primarily be repairing
vehicles and/or organizing and inventorying the facility.
C-2
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EH
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SOLUTIONS
PHOTOGRAPH LOG
Project Name:
Central Metal - Site Inspection
Site Location:
Los Angeles, CA
EPA ID No:
CAN000903324
Photo No.
1
Date:
3/27/2018
Direction Photograph
Taken:
North-Northwest
Description:
Main Office building from
Santa Fe Ave; near
intersection with Short St.
Photo No
2
Date:
3/27/2018
Direction Photograph
Taken:
East
Description:
Main Office building.
Primary facility
entrance gates at
photo-right and photo-
left.
C-3
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EH
pK
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SOLUTIONS
PHOTOGRAPH LOG
Project Name:
Central Metal - Site Inspection
Site Location:
Los Angeles, CA
EPA ID No:
CAN000903324
Photo No Date:
3 3/27/2018
Direction Photograph
Taken:
South
Description:
Debris piles located on
western side of
Warehouse building
(former Warehouse
extension building and
foundry area)
Photo No
4
Date:
3/27/2018
Direction Photograph
Taken:
East
Description:
Uncovered and
uncontained debris piles
located immediately west
ofWarehouse building
C-4
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EH
pK
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SOLUTIONS
PHOTOGRAPH LOG
Project Name:
Central Metal - Site Inspection
Site Location:
Los Angeles, CA
EPA ID No:
CAN000903324
Photo No
5
Date:
3/27/2018
Direction Photograph
Taken:
North
Description:
interior of Warehouse
building
Photo No.
6
Date:
4/9/2019
Direction Photograph
Taken:
South
Description:
interior of Warehouse
building during Stage 1
event. Note roll-off bins
with mounted placards in
background.
C-5
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EH
pK
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SOLUTIONS
PHOTOGRAPH LOG
Project Name:
Central Metal - Site Inspection
Site Location:
Los Angeles, CA
EPA ID No:
CAN000903324
Photo No
7
Date:
4/10/2019
Direction Photograph
Taken:
South
Description:
Yard immediately west of
Warehouse building and
Warehouse building
exterior (photo left)
Photo No.
8
Date:
4/10/2019
Direction Photograph
Taken:
Southeast
Description:
Yard immediately west of
Warehouse building and
Warehouse building
exterior Note scalehouse
(since removed) at photo
left.
C-6
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PHOTOGRAPH LOG
Project Name:
Central Metal - Site Inspection
Site Location:
Los Angeles, CA
EPA ID No:
CAN000903324
Photo No
9
Date:
4/10/2019
Direction Photograph
Taken:
South
Description:
Mobile laboratory parked
between Warehouse and
Main Office building; used
to analyze soil vapor
samples collected during
Stage 1 event.
Photo No.
10
Date:
4/10/2019
Direction Photograph
Taken:
South
Description:
Advancement of boring
SV-9 (central portion of
site) during Stage 1 SI
event.
C-7
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Central Metal SI Report
CAN000903324
September 2023
APPENDICES
APPENDIX D
CONTACT LOG AND CONTACT REPORTS
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CAN000903324 APPENDICES
CONTACT LOG
SITE: Central Metal
EPA ID: CAN000903324
NAME
AFFILIATION
PHONE
DATE
INFORMATION
Willow
Los Angeles
County, Office of
the Assessor
(562) 256-1701
05/18/2023
See Contact Report 1
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Central Metal SI Report
September 2023
CAN000903324
CONTACT REPORT 1
APPENDICES
AGENCY/AFFILIATION: County of Los Angeles
DEPARTMENT: Office of the Assessor, South District Office
ADDRESS/CITY: 1401 E. Willow Street, Signal Hill
COUNTY/ST ATE/ZIP: Los Angeles, California, 90755
CONTACT(S)
TITLE
PHONE
Willow
Assessment Clerk
(562) 256-1701
PERSON MAKING CONTACT: Brian P. Reilly
DATE: 18 May 2023
SUBJECT: Parcel Ownership Information
SITE NAME: Central Metal
EPA ID#: CAN000903324
The current owner and recorded owner address of all nine of the parcels associated with the
Central Metal site (6202-036-009, -010, -011, -012, and -013; and 6202-037-004, -006, -009) as
indicated by the Assessor's Office is: 8201 Santa Fe (CA) LLC, addressed at 2727 North Central
Avenue, 5N; Phoenix, AZ 85004.
D-2
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Central Metal SI Report
CAN000903324
September 2023
APPENDICES
APPENDIX E
TRANSMITTAL LIST
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CAN000903324
September 2023
APPENDICES
TRANSMITTAL LIST
Date: September 2023
Site Name: Central Metal
EPA ID No.: CAN000903324
A copy of the Site Inspection (SI) report for the above-referenced site should be sent to the
following recipients:
8201 Santa Fe (CA), LLC
Site Owner
c/o Haley Ziesemer
2727 North Central Avenue, 5N
Phoenix, AZ 85004
Javier Hinojosa
CA Department of Toxic Substances Control
Chatsworth Regional Office
9211 Oakdale Avenue
Chatsworth, CA 91311
Lee Barocas
County of Los Angeles Department of Parks and Recreation
Land Management and Compliance
1000 S. Fremont Avenue
Building A-9 West - Unit #40
Alhambra, California 91803
U.S. Environmental Protection Agency, Superfund Records Center
c/o Matt Mitguard
USEPA - Superfund Division
75 Hawthorne Street, SFD-6-1
San Francisco, CA 94105
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Central Metal SI Report September 2023
CAN000903324 ATTACHMENTS
ATTACHMENTS
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ATTACHMENT 1
REFERENCES
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ATTACHMENT 2
DEBRIS PILE TIMELAPSE
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ATTACHMENT 3
SAMPLING AND ANALYSIS PLAN (SAP) - STAGE 1 & 2
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ATTACHMENT 4
SAMPLING AND ANALYSIS PLAN (SAP) - STAGE 3
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ATTACHMENT 5
SAMPLE NO. - CLP CORRELATION TABLES
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ATTACHMENT 6
CPT LITHOLOGICAL PROFILE REPORTS
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ATTACHMENT 7
LABORATORY REPORTS - STAGE 1 & 2
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ATTACHMENT 8
LABORATORY REPORTS - STAGE 3
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ATTACHMENT 9
FIELD SAMPLING LOGBOOK
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ATTACHMENT 10
EPA DOCUMENT 540-F-94-028
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