PB95-963141
EPA/AMD/R04-95/231
August 1995
EPA Superfund
Record of Decision Amendment:
62nd Street Dump
Tampa, Hillsborough County, FL
6/29/95
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Record of Decision Amendment
Declaration
SITE NAME AND LOCATION
62nd Street Site
Tampa, Hillsborough County, Florida
STATEMENT OF BASIS AND PURPOSE
This decision document presents the amendment to the selected
remedial action for the 62nd Street Site, in Tampa, Hillsborough
County, Florida, which was chosen in accordance with CERCLA, as
amended by SARA, and, to the extent practicable, the National Oil
and Hazardous Substances Pollution Contingency Plan (NCP). This
decision is based on the administrative record file for this
site.
The Florida Department of Environmental Protection (FDEP), the
support agency, has provided input throughout the remedy
amendment process. Based on FDEP's comments, EPA expects that
concurrence on this fundamental change will be forthcoming;
although, a formal concurrence letter has not been received.
ASSESSMENT OF THE SITE
Actual or threatened releases of hazardous substances from this
site, if not addressed by implementing the response action
selected in this Record of Decision (ROD), may present an
imminent and substantial endangerment to public health, welfare,
or the environment.
DESCRIPTION OF THE FUNDAMENTAL CHANGE TO THE SELECTED REMEDY
The purpose of this document is to amend the selected remedy at
the Site. The original Record of Decision (ROD) was signed on
June 27, 1990, and previously modified by the Explanation of
Significant Differences (BSD) which became effective on October
7, 1991.
At this point, EPA has determined that the ROD must be
fundamentally changed to reflect the current conditions at the
Site. Historically, a plume of contaminated groundwater existed
off-site in the direction of groundwater flow (south to east with
respect to the site). During the Remedial Design, on-site and
off-site groundwater samples were collected and analyzed for
site-related contaminants (Cadmium, Chromium, and Lead). The
results showed that the off-site groundwater was below cleanup
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levels documented in the 1990 ROD. An Off-site Groundwater
Monitoring Program was then initiated to study this change in
groundwater quality. After collecting quarterly samples for 24
months, the off-site groundwater has been documented to be
consistently below the cleanup criteria for groundwater. The on-
site groundwater was sent to a local Publicly Owned Treatment
Works (POTW). The source of the contamination (soil/waste) has
been Solidified/ Stabilized, and a slurry wall/cut-off trench has
been installed around the perimeter of the Site. Based on the
facts concerning the groundwater quality of the Site, EPA
modifies the selected remedy to eliminate the Surficial Aquifer
Groundwater Extraction and Treatment component of the remedy.
STATUTORY DETERMINATIONS
The selected remedy is protective of human health and the
environment, complies with Federal and State requirements that
are legally applicable or relevant and appropriate to the
remedial action, and is cost-effective. This remedy utilizes
permanent solutions and alternative treatment technologies to the
maximum extent practicable and satisfies the statutory preference
for remedies that employ treatment which reduces toxicity,
mobility, or volume as a principal element.
Because this remedy will result in hazardous substances remaining
onsite, a review will be conducted within five years after
commencement of remedial action to ensure that the remedy
continues to provide adequate protection of human health and the
environment.
&/J9/95
DATE' Richard D. Green •*-"*-
Associate Director
Office of Superfund and
Emergency Response
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1.0 Introduction 1
1.1 Site Location and Description 1
1.2 Site History and Enforcement Activities 2
1.3 Explanation of Fundamental Remedy Change 5
2.0 Enforcement Analysis 6
3 .0 Community Relations 7
4.0 Current Site Status 7
4.1 On-site Soils 7
4.2 Hydrogeology 8
5.0 Summary of On-site Risks 12
6.0 Comparative Analysis - Nine Evaluation Criteria .... 12
7.0 Selected Remedy 13
8.0 Statutory Determination 13
8.1 Protection of Human Health and the Environment . . 14
8.2 Attainment of Applicable or Relevant and Appropriate
. Requirements 14
Table 1 16
Table 2 17
Table 3 21
Table 4 22
Table 5 24
Monitor Well Locations - Site Map 25
Responsiveness Summary
Appendix 1 - Graphical Representations of the Groundwater
Quality Data
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U.S. ENVIRONMENTAL PROTECTION AGENCY
RECORD OF DECISION AMENDMENT
62nd Street Dump Superfund Site
Tampa, Hillsborough County, Florida
1.0 INTRODUCTION
The purpose of this document is to amend the selected remedy for
the 62nd Street Superfund Site. The Record of Decision (ROD) was
signed on June 27, 1990, and previously modified by the Explanation
of Significant Differences (BSD) which became effective on October
7, 1991. Based upon the requirements of the Comprehensive
Environmental Response, Compensation, and Liability Act (CERCLA)
Section 117 and the National Oil and Hazardous Substance Pollution
Contingency Plan (NCP) Section 300.435(c) (2) (ii), EPA has
determined that the ROD must be fundamentally changed to reflect
the current conditions at the Site. Historically, a plume of
contaminated groundwater existed off-site in the direction of
groundwater flow (south to east with respect to the site) . During
the Remedial Design, on-site and off-site groundwater samples were
collected and analyzed for site-related contaminants (cadmium,
chromium, and lead). The results showed that the off-site
groundwater was below the cleanup goals presented in the 1990 ROD.
A Off-site Groundwater Monitoring Program was then initiated to
study this change in groundwater quality. After collecting
quarterly samples for 24 months, the off-site groundwater has been
documented to be consistently below the cleanup criteria for
groundwater. The On-site Groundwater was sent to a local Publicly
Owned Treatment Works (POTW). The source of contamination (soil
and waste) has been Solidified/Stabilized, and a slurry wall/cut-
off trench has been installed around the site. Based on the facts
concerning the groundwater quality of the Site, EPA modifies the
selected remedy to eliminate the Surficial Aquifer Groundwater
Extraction and Treatment component of the remedy.
1.1 Site Location and Description
The 62nd Street Dump Site is located in Tampa, Hillsborough County,
Florida, north of Columbus Drive and just west of 62nd Street
(Figure 1) . The site is a five and one-half acre private landfill
formerly used for the disposal of industrial waste. The Site is
located in an area with mixed residential and light industrial land
•use. The Site is bounded on the west by a series of small
shallowponds formed for fish breeding. To the east and south of
the Site are residential areas interspersed with light commercial
and industrial operations. To the north of the Site is undeveloped
land. The current landowner operates an automobile scrap yard on
the southern portion of the Site. A site map is presented as
Figure 1.
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1.2 Site History and Enforcement Activities
The 62nd Street Dump Site was operated for approximately three
years in the mid-1970s as a borrow pit; that is, sand was excavated
and sold. When the owner of the Site ceased operation of the
borrow pit, he allowed several companies in Tampa to use the
remaining pit as a disposal area for various waste materials,
including shredded automobile parts, batteries, waste cement, kiln
dust, and kiln liners. The owner ceased dumping in 1976, but
unauthorized dumping of household garbage and construction debris
continued after this date.
In 1976, the potential for environmental problems at the Site was
recognized when fish kills occurred in fish breeding ponds on the
adjacent property belonging to Peninsular Fisheries. On November
30, 1976, the Hillsborough County Environmental Protection
commission (EPC) issued a notice to cease all disposal activities
at the Site. The first major investigation at the Site was
conducted in June 1979 by Fish Doctors Laboratory, Inc. (FDL) under
contract with Peninsular Fisheries, Inc.
Environmental sampling was conducted periodically by the
Hillsborough County EPC and by FDER. The areas sampled included
private wells, fish breeding ponds, a shallow sand point well
installed by FDER, and various areas surrounding the Ste. An
analysis of the sample from the shallow sand point well showed
groundwater contamination exceeding the FDER Chapter 17-3 standard
for chromium. However, 1982 FDER analyses of water samples from
wells upgradient and downgradient of the site did not show any
metals concentrations above background levels.
A Remedial Action Master Plan (RAMP) was prepared for the 62nd
Street Site by NUS Corporation under contract to EPA in June 1983.
As part of RAMP development, a preliminary risk assessment was
performed, and approaches to both short- and long-term remedial
actions were developed. The RAMP indicated that there was no
immediate concern over drinking water contamination; however,
groundwater monitoring should be continued and a feasibility study
should be conducted to evaluate long-term remediation.
In March 1984, the FDER and the EPA entered into a Cooperative
•Agreement to conduct a Remedial Investigation/Feasibility Study
(RI/FS) at the site. The RI was conducted in 1986 by a team of
several consulting firms consisting of Mayes, Sudderth & Etheredge,
Inc., Fred C. Hart Associates, Inc., Universal Engineering Testing
Company, Inc., and Compuchem Laboratories, Inc. The field
activities were conducted in two phases. Phase I was conducted in
February 1986, and consisted'of construction and sampling of 12
test pits across the site. Phase II was conducted in July arid
August 1986 and involved installing and sampling 14 groundwater
monitoring wells, sampling 10 domestic wells, sampling surface
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water and sediment from the fish ponds, and sampling on-site
surface soils.
Camp, Dresser, & McKee, Inc. (CDM) was contracted by FDER in August
1988 to conduct a Feasibility Study (FS) for the Site. The FS
developed and analyzed potential alternatives for remediation at
the Site. The FS also supplemented the RI by conducting additional
field activities to characterize the nature and extent of soil,
sediment, surface water, and groundwater contamination at the site.
In July 1989, additional domestic well sampling was performed by
the Flbrida Department of Health and Rehabilitative Services (HRS).
It was determined that waste buried at the Site fall into two
categories: auto part/battery (non-cement) wastes and cement waste.
The disposal of the non-cement waste at the Site has resulted in
the release of hazardous substances including antimony, arsenic,
cadmium, chromium, copper, lead, and polychlorinated biphenyls
(PCBs) in the soil. The surficial aquifer both on-site and off-
site is also contaminated with cadmium, chromium, and lead above
health-based levels. The cement wastes represent little threat
through either direct contact or leaching to groundwater.
Based upon consideration of the requirements of CERCLA, the
detailed analysis of the alternatives, and public comments, EPA has
determined that the alternative. which includes
solidification/stabilization of the non-cement waste, capping of
the soil, and groundwater extraction is the most effective and
efficient remedy for the 62nd Street site in Tampa, Florida. The
function of this remedy is to reduce the risks associated with
exposure to contaminated groundwater in the surficial aquifer and
contaminated soil.
The major components of the selected remedy include:
• Solidification/Stabilization of the battery wastes,
shredded auto parts, and contaminated soils (approximately
48,000 cubic yards). Contaminants of concern associated with
the battery wastes and shredded auto parts are antimony,
arsenic, cadmium, chromium, copper, lead, and polychlorinated
biphenyls (PCBS).
• No treatment of the on-site cement wastes since they
present little threat through either direct contact or
leaching to groundwater.
• Capping of the entire site (approximately 5.5 acres) with
a two-foot vegetative soil cover underlain by an impermeable
membrane.
• Extraction and treatment of the groundwater from the
surficial aquifer both on-site and off-site. Contaminants of
concern in the surficial aquifer are lead and chromium.
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• Institutional controls or other .land use restrictions to
ensure the integrity of the cap and the treated soils. The
presence of groundwater contamination at the site indicates
that leach-ing of contaminants from waste has occurred.
The duration of the soil treatment and groundwater cleanup was
estimated to take three to four years although groundwater cleanup
may take longer. Following completion of the cleanup, monitoring
will be conducted for a minimum of five years to demonstrate that
the cleanup has met the remediation goals. The total present worth
cost of this alternative was estimated to be $16,460,000.
Further clarification of the selected remedy was presented in the
Explanation of Significant Differences (BSD) which became effective
on October 7, 1991. The significant differences between the remedy
described in the ROD and in this BSD are as follows:
1. The cleanup criteria for lead in the subsurface soils will
be 224 mg/kg replacing both 17.4 mg/kg for non-cement waste
and 170 mg/kg for cement waste.
2. Certain construction-type debris located within the 62nd
Street Site may be separated from materials which are required
to be stabilized/solidified and may then be disposed off-site
and/or recycled.
The ROD Amendment is being issued by the U.S. Environmental
Protection Agency (EPA) , the lead agency, with assistance from the
Florida Department of Environmental Protection (FDEP, also known as
FDER), the support agency.
This document will become part of the Administrative Record File as
required by the NCP §300.825(a)(2). The Administrative Record File
is available for public review at the locations listed below:
Tampa/Hillsborough County
Public Library/Special Collections
900 North Ashley
Tampa, Florida 33602
(813) 223-8945
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EPA Region IV Office
EPA Records Center
345 Courtland Street, NE
Atlanta, Georgia 30365
(404) 347-0506
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1.3 Explanation of Fundamental R€«nedy Change
Prior to performance of the remedial design activities in 1991, the
Potentially Responsible Parties (PRPs) sampled all existing off-
site monitor wells installed within the surficial aquifer with the
exception of MW-14 which was not accessible at the time and MW-21
which is located more than 700 feet upgradient of the 62nd Street
Superfund Site. To ensure that the groundwater samples collected
for analysis were representative of the groundwater at the site,
each monitor well was thoroughly developed to remove fine sediments
from the filter media surrounding the well screen and from within
the well casing. Additionally, the groundwater sampling protocols
included collecting both unfiltered and filtered samples for
analysis of dissolved metal constituents. Results of the
groundwater sampling and analysis program were presented to the EPA
in an Ardaman & Associates report titled "Pre-Design Activities,
62nd Street Superfund Site, Tampa, Hillsborough County, Florida",
dated February 7, 1992. The measured concentrations of cadmium,
chromium and lead in all the off-site monitor wells were below the
corresponding clean-up levels established in the ROD.
After carefully considering this new information, EPA requested
that six additional monitor wells be installed along the perimeter
of the 62nd Street Superfund Site. The purpose of installing the
new wells was to collect additional groundwater quality data to
determine if the on-site contaminated groundwater had migrated off
the property. In April 1992, six monitor wells (designated MW-22
through MW-27) were installed at the locations shown in Figure 1.
As shown in the figure, three wells were installed on the east
side, two wells on the south side and one well on the west side of
the property. Installation of each monitor well was observed by
the EPA Oversight Contractor to substantiate that the well
construction met the EPA requirements. Following well development
and purging, unfiltered and filtered groundwater samples were
collected from the six monitor wells for determination of the
concentrations of cadmium, chromium and lead. The concentration of
chromium in the unfiltered sample obtained from MW-23 was 51
micrograms per liter (jig/1) , which slightly exceeded the 50 /-ig/1
clean-up level for chromium. In all the filtered samples, the
concentrations of cadmium, chromium and lead were below the
respective clean-up levels.
'To confirm the groundwater quality data reported by Ardaman &
Associates, Inc., representatives of the EPA Environmental Services
Division (EPA-BSD) collected unfiltered groundwater samples from
MW-2, MW-23, MW-25 and MW-26, and analyzed each sample for 31
parameters in the target list, which included cadmium, chromium and
lead. The EPA groundwater samples were sent to the EPA-BSD
laboratory in Athens, Georgia for analysis. During the EPA
sampling program, the PRPs also collected unfiltered groundwater
samples from the same monitor wells. The PRPs samples were sent to
the Contract Laboratory (Thornton Laboratories, Inc. of Tampa,
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Florida). EPA test results for the samples collected at MW-23, MW-
25 and MW-26 did not indicate any lead, cadmium or chromium
concentration above the detection limits for these constituents.
Chromium was detected in the sample collected by Ardaman &
Associates, Inc. from MW-26, but the concentration was below the 50
/xg/1 clean-up level. Cadmium and lead were not detected in the
samples obtained by Ardaman & Associates, Inc. from MW-23, MW-25
and MW-26.
Because of the differences in the measured concentrations of
cadmium, chromium and lead in the groundwater samples obtained
during the FS and subsequently by the EPA and PRPs, the EPA agreed
to implementation of a quarterly groundwater monitoring program at
selected off-site wells installed within the surficial aquifer.
The groundwater quality issues and the groundwater monitoring
program was discussed in a meeting at the EPA office on July 24,
1992 in Atlanta, Georgia. The meeting was attended by the
representatives of the PRPs and the EPA.
Prior to implementing the off-site groundwater monitoring program,
the EPA requested a letter from the PRPs describing the details of
the groundwater monitoring . program and how it was to be
implemented. On behalf of the PRPs, Ardaman & Associates, Inc.
prepared the proposed off-site groundwater monitoring program and
forwarded it to the EPA on July 31, 1992. In a letter dated August
22, 1992, the EPA approved the proposed off-site groundwater
monitoring program.
The ROD Amendment was prepared to document the field and laboratory
test results associated with the off-site groundwater monitoring
program for the 62nd Street Superfund Site at Tampa, Florida. As
stated in the EPA-approved Remedial Design (RD) for this site, the
objective of the off-site groundwater monitoring program was to
monitor the concentrations of cadmium, chromium and lead within the
surficial aquifer in the vicinity of and downgradient from the
site, and to evaluate if extraction and treatment of off-site
groundwater would be necessary. The groundwater sampling operation
at the off-site monitor wells began in August 1992 and continued on
a quarterly basis through September 1994. A summary of the results
of the field and laboratory tests on groundwater samples obtained
from the off-site monitor wells, and an evaluation of the data is
found in the attached tables and graphs.
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2.0 Enforcement Analysis
EPA and the PRPs signed a Consent Decree (CD) for the Remedial
Action and Remedial Design at the site. The CD was entered by the
U.S. District Court on January 27, 1992. Under the CD, the PRPs
agreed to complete the Remedial Design/Remedial Action and to pay
past cost for the Remedial Investigation/Feasibility Study. The
PRPs have designed the Groundwater Extraction System as required by
the 1990 ROD. However, EPA allowed the PRPs to study the off-site
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groundwater to determine if the groundwater quality has improved.
Concurrent with the off-site groundwater program, the PRPs began to
implement the source component of the selected remedy. At this
point, the Solidification/Stabilization component of the remedy has
been completed. Also, a slurry wall has been keyed into the
confining layer.
3.0 Conttnunity Relations
EPA prepared a ROD on June 27, 1990, taking into consideration the
comments from the public and the results from the Feasibility
Study. The most environmentally sound and cost effective remedy
was selected as a part of the ROD phase of the Superfund process.
At this time, the selected remedy included Solidification/
Stabilization, institutional . controls/deed restrictions, and a
groundwater extraction system.
In September 1991, a public meeting was held to present the
Explanation of Significant Differences (BSD). The BSD modified the
cleanup goals for soil and clarified the handling of construction
debris.
In March 1993, EPA held a meeting to announce the completion of
the Remedial Design and to present the construction schedule for
the Remedial Action for the Site.
The Record of Decision (1990) contains a Responsiveness Summary
that lists all public comments and EPA/FDEP comments. No comments
were received on the Explanation of Significant Differences (BSD) .
4.0 CURRENT SITE STATUS
4.1 On-site Soils
•As stated previously, the Remedial Action is in progress. The
contaminated soil and non-cement waste have been solidified in
cement. The entire site was divided into grid locations and
analyzed for cadmium, chromium, and lead. Any soil found in a grid
location above the cleanup goals was treated in the solidification
process. Non-cement waste was also sampled and treated. The
treated material has met Remedial Design Performance Standards:
Hydraulic Permeability (10~6 cm/sec), Toxicity Characteristic
Leaching Procedure (Lead), and Compressive Strength (50 psi).
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Detailed results will be made available in the Remedial Action
Report.
4.2 Hydrogeology
Slurry Wall/Cut-off Trench
A slurry wall was constructed around the perimeter of the Site.
The purpose of the slurry wall is to create a hydrogeologic
barrier. The design criteria for the slurry wall is a hydraulic
permeability of 10~7, four orders of magnitude greater than the
surrounding soils (averaging approximately 10~3) .
On-site Groundwat er
During the Solidification/Stabilization Phase of the Remedial
Action, the on-site groundwater was utilized in the solidification
process to mix cement and soil. Also, excess on-site groundwater
was sent to the local Publicly Owned Treatment Works (Hooker's
Point). .
Off-site Groundwater
Historically, the off-site groundwater quality has been measured
above the cleanup standards: Cadmium 10 /xg/L, Chromium 50 /ig/L,
and Lead 15 Aig/L. New information obtained during the Pre-Design
Phase of the cleanup indicates that the off-site groundwater
quality has improved to the point that it is below cleanup goal.
In light of this new information, the off-site groundwater sampling
program began in August 1992 and continued on a quarterly basis
through August 1994. The objective of the groundwater monitoring
program was to acquire additional groundwater quality data for an
extended period of time to assess if any off-site groundwater
contamination exists within the surficial aquifer in the vicinity
of the 62nd Street Superfund Site.
The water table gradients measured during the RI/FS and
subsequently by the PRPs and the EPA indicated that any
•• downgradient plume migration in the surficial aquifer would be in
the south/southeast direction. The off-site monitor wells selected
for the monitoring program were the ones that were installed in the
surficial aquifer and had the highest probability of being impacted
by any plume migration from the site. On this basis, MW-12S, MW-
13S, and MW-17 were selected for the off-site groundwater
monitoring program. Additionally, MW-22, MW-23, MW-24, MW-25 and
MW-26 at the east.and south property lines were included in the
program to assess the groundwater quality at the edge of the
property. The locations of these monitor wells are shown in Figure
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1.
After the off-site groundwater monitoring program began, the EPA
requested that the PRPs install an additional monitor well at the
west property line. Subsequently, MW-28 (see Figure 1) was
installed on January 27, 1993. Groundwater at MW-28 was sampled
three times during the program before the well was abandoned on
September 10, 1993 because of its close proximity to the proposed
slurry wall alignment.
All surficial aquifer monitor wells installed during the FS and the
new monitor wells installed by Ardaman & Associates, Inc. were
developed prior to sampling to ensure recovery of representative
groundwater samples. A compressed air development system was used
to develop the wells. An oil-free portable compressor and a diesel
fueled compressor with organic filters fitted to the air discharge
hose were used to supply air for the well development system. Air
flow into the well was adjusted to pressures low enough to protect
the well screen and sand filter surrounding the well screen. An
automatic timer controlled the frequency and duration of air surges
into the water column. Air directed into the standing water column
forced the water to rise to the surface and discharge into five-
gallon buckets where the groundwater could be inspected. The
groundwater exhibited brown or gray discoloration during the
initial stage of well development. As development continued, the
water became increasingly clearer and pH and conductivity readings
became more stable. Well development was continued until the
groundwater exhibited characteristics of reduced turbidity and
stabilization of the pH and conductivity. After development was
complete, the well was secured with a locking cap or cover and the
well remained undisturbed until sampling.
Because the monitor wells were developed in advance of sampling,
purging was necessary prior to sampling to remove standing water
from within the well casings and to ensure recovery of
representative groundwater samples. Purging was accomplished at
each monitor well location using a low volume peristaltic pump and
new pre-cleaned lengths of tubing. Purging continued until at
least three casing volumes of water were removed and three
consecutive measurements of temperature, specific conductance, and
pH readings were within ±5% of each other and the estimate of
turbidity was less than 5 N.T.U. If the field parameters remained
•greater than ±5% after five well casing volumes of water were
removed, sampling could.begin. Equipment cleaning and sample
custody procedures followed the approved QA/QC protocols and were
observed by the EPA Oversight Contractor during each sampling
event.
Off-site Groundwater Sampling Schedule. Methods and Parameters
The quarterly sampling dates for 1992, 1993 and 1994 are presented
in Table 1. Unfiltered and filtered groundwater samples were
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collected throughout the program at each monitor well location. To
obtain filtered samples, the groundwater was filtered through a
0.45 micron in-line filter before discharging into the sample
container.
Initially, the major groundwater monitoring parameters consisted of
cadmium, chromium and lead. However, following the first quarter
of sampling in August 1992, the EPA requested the PRPs to add
sodium and sulfate to the list of major monitoring parameters.
Accordingly, for the remainder of the off-site monitoring program,
the major monitoring parameters consisted of cadmium, chromium,
lead, sodium and sulfate. The parameters for field measurement
consisted of pH, specific conductance and temperature of the
groundwater samples. Although turbidity was recorded during
several quarterly sampling events, it was not routinely monitored
for each sampling operation.
Off -site Groundwater Quality Data
Results of the quarterly off -site groundwater monitoring program
are presented in Table 2. As. shown, the field measurements
included determinations of pH, conductivity, temperature, and
turbidity. .Laboratory chemical analyses included determinations of
the concentrations of cadmium, chromium, lead, sodium and sulphate.
As shown in Table 2, the measured cadmium concentration in both
filtered and unfiltered groundwater samples ranged from less than
0.1 to 1.9 £ig/l. The cadmium concentrations in filtered samples
were generally lower than those in the corresponding unfiltered
samples. Also, the cadmium concentration in most of the
groundwater samples was less than or equal to 0.1 /xg/1. Based on
the results presented in Table 2, the measured cadmium
concentration in both filtered and unfiltered groundwater samples
obtained from all the monitor well locations were well below the
clean-up level of 10
Measured chromium concentration in unfiltered groundwater samples
ranged from less than 1 to 23 /xg/1 and that in filtered groundwater
samples ranged from less than 1 to 15 M9/1- T^e chromium
concentrations in filtered samples were generally lower than those
• in the corresponding unfiltered samples . Based on the results
presented in Table 2, the measured chromium concentration in both
filtered and unfiltered samples obtained from all the monitor well
locations were well below the clean-up level of 50
Measured concentration of lead in unfiltered groundwater samples
ranged from less than 1 to 24 /ig/1 and that in filtered groundwater
samples ranged from less than 1 to 17 pig/1. The measured lead
concentration in the unfiltered sample obtained from MW-12S on
January 26, 1993 was 24 /xg/1 which is above the clean-up level of
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15 /xg/1. The lead concentration in the corresponding filtered
sample was 6 /xg/1, which is below the clean-up level. In addition,
the lead concentration in a duplicate sample of MW-12S (i.e., MW-
12D) was below the clean-up level for both filtered and unfiltered
samples. The measured lead concentrations in the unfiltered and
filtered samples obtained from MW-22 on January 26, 1993 were 18
jug/1 and 17 /ig/1, respectively, which are just slightly above the
clean-up level. The measured lead concentrations in the unf iltered
sample obtained from MW-24 on January 26, 1993 was 16 p.g/1, which
is just slightly above the clean-up level whereas the corresponding
filtered sample had a lead concentration of 6 p.g/1 which is below
the clean-up level. To determine the reasons for the inconsistency
in lead concentration data, spot samples were collected at MW-12S
and MW-22 on March 22, 1993. Lead concentrations in both
unf iltered and filtered spot samples were less than 5 fJ.g/1, which
is well below the clean-up level. Based on the lead concentration
in the duplicate sample and the spot samples, the measured elevated
lead concentrations in the samples obtained from MW-12S, MW-22, and
MW-24 on January 26, 1993 may be attributed to possible laboratory
error. For all other tested samples, the measured lead
concentrations were below the clean-up level of 15 /zg/1.
The pH, specific conductance, and temperature of the groundwater
samples were routinely determined at each monitor well location in
accordance with the protocols of the approved quality assurance
plan for remedial activities at the 62nd Street Superfund Site.
These field parameters are used as indicators to ensure that the
collected samples are representative of the groundwater in the
aquifer being monitored. Although turbidity was not included in
the sampling protocol of the approved quality assurance plan, it
was measured on some sampling dates during the off-site monitoring
program. Results of the field determinations of pH, specific
conductance, temperature, and turbidity are presented in Table 2.
Summary of Findings
Results of the off-site groundwater monitoring program indicate
that the measured cadmium and chromium concentration in both
filtered and unfiltered groundwater samples obtained from all the
monitor well locations during the monitoring period were well below
the respective clean-up levels.
Lead concentrations above the clean-up level of 15 /ig/1 were
documented in the groundwater samples obtained from MW-12S, MW-22,
and MW-24 on January 26, 1993. However, based on the analysis of
a duplicate sample (MW-12D) and the spot samples obtained from MW-
12S and MW-22 on March 22, 1993, it appears that all measurements
after this date are consistently below the cleanup standard. For
MW-24, the lead concentration in the unfiltered sample obtained on
January 26, 1993 was 16 /ig/1, which is slightly above the clean-up
level of 15 M9/l» whereas the dissolved lead concentration in the
corresponding filtered sample was 6 fig/1, which is well below the
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clean-up level. For all other filtered and unfiltered samples, the
measured lead concentrations were below the clean-up level of 15
The findings of the quarterly off -site groundwater monitoring
program confirm that the concentrations of cadmium, chromium and
lead in the groundwater at the monitor wells located hydraulically
downgradient of the 62nd Street Superfund Site are below the
established clean-up levels for these constituents. The remaining
on- site surficial groundwater was sent to a local POTW. Based on
these findings, EPA has decided that to eliminate the ROD component
that requires an extraction and treatment groundwater system in the
vicinity of the 62nd Street Superfund Site.
5.0 SUMMARY OF ON -SITE RISKS
At the time that the ROD was signed in June 1990, the public health
threat for groundwater was through consumption of the surficial
aquifer groundwater. The Applicable Relevant and Appropriate
Requirements (Maximum Contaminant Limits - MCLs) were applied, and
the cleanup goals were established in the ROD. There are three
Cleanup Goals for Groundwater which are as follows: Cadmium 10
/xg/L, Chromium 50 /ug/L, and Lead 15 /xg/L. Current conditions
indicate that the off -site groundwater quality is below the 1990
ROD cleanup goals. Therefore, the purpose of this document is to
eliminate the Groundwater Extraction component of the selected
remedy since the groundwater quality is below the 1990 ROD cleanup
goals .
6.0 Comparative Analysis - Nine Evaluation Criteria
This analysis will compare the original selected remedy alternative
with the ROD Amendment Alternative of eliminating the Groundwater
Treatment System utilizing the nine evaluation criteria detailed in
the National Contingency Plan (NCP) :
Overall Protection of Human Health and the Environment
Historically, the site has posed a threat to human health and the
environment. Considering current conditions, the ROD Amendment
alternative is within the Agency's guidelines since the groundwater
is below cleanup goals.
• Compliance with Applicable or Relevant and Appropriate Requirements
(ARARs) - The ROD Amendment alternative meets cleanup goals and
respective ARARs. No waiver from ARARs would be necessary.
Long Term Effectiveness and Performance - Groundwater has been
monitored for an extended period of time and has exhibited levels
below cleanup standards .
Reduction of Toxicity. Mobility, and Volume.. - From the time of the
writing of the original ROD to the time of writing of this ROD
-------
13
Amendment, the toxicity, mobility, and volume has been reduced in
groundwater to the point that it is below cleanup goals. The plume
of contamination in the ROD has retracted.
Short-Term Effectiveness - At this time, groundwater cleanup goals
are being met. With the source solidified and stabilized, the
threat to groundwater has been reduced.
Implementability - The Groundwater Extraction System was designed.
However, considering the current groundwater quality, the system is
not necessary.
Cost - Cost would be reduced by eliminating the Groundwater
Extraction System. This action would decrease the cost of the
remedy by approximately $7 million.
State Acceptance - The State of Florida concurs with the
elimination of the Groundwater Extraction component of the ROD.
Community Acceptance - The community is very active and
representatives in the community communicate frequently with the
EPA. Given the new information, the community will be informed of
the reduced threat and will continue to participate in the
Superfund process.
7.0 SELECTEP REMEPy
Based upon consideration of the requirements of CERCLA, the new
information presented, periodic study, and public comments, EPA has
determined that the Groundwater Extraction System should be
eliminated since the cleanup goal are consistently being met. All
other aspects of the selected remedy remain the same.
Therefore, the major components of the selected remedy include:
• Solidification/Stabilization of the battery wastes,
shredded auto parts, and contaminated soils (approximately
48,000 cubic yards). Contaminants of concern associated with
the battery wastes and shredded auto parts are antimony,
arsenic, cadmium, chromium, copper, lead, and polychlorinated
biphenyls (PCBS).
• No treatment of the on-site cement wastes since they
present little threat through either direct contact or
leaching to groundwater.
• Capping of the entire site (approximately 5.5 acres) with
a two-foot vegetative soil cover underlain by an impermeable
membrane.
• Institutional controls or other land use restrictions to
ensure the integrity of the cap and the treated soils. The
presence of groundwater contamination at the site indicates
that leaching of contaminants from waste has occurred.
8.0 STATUTORY DETERMINATION
-------
14
Considering the new information that has been developed and the
groundwater quality at the site, EPA and FDEP believe that the
remedy remains protective of human health and the environment,
complies with Federal and State requirements that are applicable or
relevant and appropriate to this remedial action, and is cost
effective. In addition, the remedy continues to utilize permanent
solutions and resource recovery technologies to the maximum extent
practicable for this site and satisfies CERCLA § 121.
8.1 Protection of pXiTT^*n. Health and the Environment
The selected remedy is considered to be protective by meeting the
Groundwater Cleanup Goals.
8.2 Attainment of Applicable or Relevant and Appropriate
Requirements (ARARs)
Remedial Actions performed under' CERCLA must comply with all
Applicable or Relevant and Appropriate Requirements (ARARs) . The
selected remedy is found to meet or exceed the following ARARs.
FEDERAL REQUIREMENTS:
Clean Water Act /Safe Drinking Water Act
EPA's determination of appropriate groundwater cleanup criteria
involves an evaluation of contaminant concentrations relative to
the available health-based standards. Maximum Concentration Limits
(MCLs) and Maximum Concentration Limit Goals (MCLGs) of the Safe
Drinking Water Act (SDWA) (40 C.F.R. Part 141 and 142), and Federal
Ambient Water Quality Criteria (AWQC) of the Clean Water Act
(CWA) (40 C.F.R. Part 122.44) will be met at this site.
Clean Air Act
The objective of the Clean Air Act (CAA) is to protect and enhance
the quality of the nation's air resources in order to promote and
maintain public health and welfare and the productive capacity of
the population. The CAA achieves this objective by regulating
emissions into the air. Pursuant to the CAA, EPA has promulgated
National Ambient Air Quality Standards. The CAA is an ARAR and the
regulatory standard and the regulatory standards of the of the CAA
will be complied with during the implementation of the remedy.
Toxic Substance Control Act (TSCA)
»
40 CFR Part 761, promulgated pursuant to TSCA, establishes criteria
to determine the adequacy of the cleanup of spills resulting from
the release of materials containing PCBs. The 62nd Street Dump
Site is classified as a non- restricted access area. The
requirement for decontaminating PCS spills in a non- restricted
access area is to decontaminate the soil to 10 mg/kg PCBs by
weight, provided the soils are excavated to a minimum depth of 10
inches. The excavated soil must be replaced with clean soil which
contains less than 1 mg/kg PCBs. The selected remedy will meet the
TSCA requirements through the construction of the Top Cover System
(Cap) .
-------
15
Endangered Species Act
The selected remedy is protective of species listed as endangered
or threatened under the Endangered Species Act . Requirements of
the interagency Section 7 Consultation Process, 50 C.F.R. Part 402,
were met.
National Historic Preservation Act (NHPA)
The NHPA requires that action be taken to preserve or recover
historic or archaeological data that might be destroyed as a result
of Site activities. There is no information to indicate that the
62nd Street Dump Site contains any historic or archaeological
significance.
Occupational Health and Safety Act (OHSA)
The selected Remedial Action Contractor will develop and implement
a health and safety program for its workers. All on-site workers
will meet the minimum training and medical monitoring requirements
outlined in 40 CFR 1910.
STATE REGULATIONS:
Florida Administrative Code Chapter 17-3
Water quality standards for surface water and groundwater affected
by leachate and storm run-off from the Site will be met.
Florida Administrative Code Chapter 17-6
Effluent limitations and operating requirements for waste-water
facilities treating landfill leachate will be met.
LOCAL REGULATIONS:
City of Tampa
The City of Tampa has established minimum quality standards for
disposal to POTWs. The Disposal Standards for discharge to the
local POTW were met.
Southwest Florida' Water Management District (SWFWMD)
• The Southwest Florida Water Management District will be consulted
during remedial design to assure compliance with surface water run-
off for the Site.
8.3 Cost Effectiveness
The elimination of the Groundwater Treatment System is cost
effective since the contaminants that the system was designed to
treat are currently below the cleanup goals of the selected remedy.
-------
16
Table 1
SAMPLING DATES FOR OFF-SITE GRODNDWATER
MONITORING PROGRAM
Year
1992
1993
1994
Quarter
3
4
1
2
3
4
1
2
3
Sampling Date
August 28 -31
October 26 - 27
January 26 - 27
April 26
July 26 - 28
October 26 - 27
January 24 - 25
April 23 - 26
September 1 - 2
Sampling Period
August - September
October - December
January - March
April - June
July - September
October - December
January - March
April - June
July - September
-------
Table 2
OFF-SITE SURFICIAL AQUIFER WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor
Well
MW-12S
Date
Sampled
08-31-92
10-27-92
01-26-93
03-22-93
04-26-93
07-27-93
10-26-93
01-25-94
04-24-94
09-01-94
Field
pH
(Units)
N
6.32
6.60
6.64
6.80
8.44
6.68
6.35
5.95
6.57
6.93
Field
Conductivity
(^mhos/cm)
N
1,390
1,340
1,120
1,021
1,360
1,647
1,286
1,141
1,540
200
Field
Temperature
CC)
N
24.4
24.8
22.0
22.6
22.5
22.7
23.0
22.6
22.3
23.9
Field
Turbidity
(N.T.U.)
N
NA
NA
2.2
6.0
0.63
NA
0.40
NA
NA
NA
Cadmium
(W9/0
[10]
U
O.1
<0.1
1.0
<0.1
0.3
0.3
<0.1
<0.1
<0.1
<0.1
F
<0.1
<0.1
0.3
<0.1
0.2
0.1
0.1
<0.1
0.1
<0.1
Chromium
WO
[50]
U
<1
2
11
«1
<1
13
10
6
<1
<:1
F
<1
2
13
<1
<1
6
7
6
<1
<1
Lead
(cg/l)
[15]
U
<1
<1
24
<1
2
1
<1
1
1
<1
F
<1
1
6
<5
2
3
<1
<1
2
<1
Sodium
(mg/l)
N
U
NS
94
71
NS
85
108
83
81
102
92
F
NS
100
NA
NS
85
109
83
81
101
90
Sulfate
(mgfl)
N
U
NS
462
291
NS
1,150
490
400
352
344
390
F
NS
419
NA
NS
1,200
450
420
350
380
370
MW-13S
08-28-92
10-27-92
01-27-93
04-26-93
07-28-93
10-28-93
01-24-94
04-26-94
09-01-94
6.23
5.90
5.48
5.89
5.80
5.61
5.60
5.95
6.08
510
530
610
645
622
526
531
548
400
27.2
27.5
23.2
22.7
25.2
26.0
23.0
23.9
26.7
NA
NA
1.0
1.04
NA
15.7
NA
NA
NA
<0.1
0.1
0.7
0.3
0.1
0.3
<0.1
<0.1
0.1
<0.1
0.1
0.2
<0.1
0.1
<0.1
<0.1
<0.1
<0.1
1
3
14
3
7
8
6
1
1
1
<1
13
2
6
6
6
1
1
<1
<1
9
3
1
2
2
<1
<1
<1
<5
9
1
<1
<1
5
4
<1
NS
36
49
50
44
39
46
46
48
NS
40
NA
50
45
39
45
45
50
NS
84
109
62
109
133
108
69
75
NS
82
NA
69
122
124
104
68
81
N = No Standard. U= Unfiltered, F = Filtered, NA = Not Analyzed, NS = Not Sampled
[ ] = E.P.A. Cleanup Level .
-------
18
Table 2 (continued)
OFF-SITE SURFICIAL AQUIFER WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor
Well
MW-17
MW-22
Date
Sampled
08-28-92
10-27-92
01-26-93
04-26-93
07-28-93
10-26-93
01-24-94
04-24-94
09-01-94
08-31-92
10-26-92
01-26-93
03-22-93
04-26-93
07-26-93
10-26-93
01-24-94
04-23-94
09-01-94
Field
PH
(Units)
N
6.72
6.52
6.54
6.28
6.59
6.64
6.35
5.37
6.68
6.82
6.47
6.97
7.02
6.50
7.15
6.55
6.11
6.44
6.68
Field
Conductivity
(^mhos/cm)
N
1,170
1,190
1,050
1.278
781
1.162
1,141
898
700
300
290
235
247
322
278
352
436
439
300
Field
Temperature
(•C)
N
24.2
25.6
21.0
20.3
23.1
24.0
20.7
21.3
25.0
26.9
27.5
23.5
23.7
22.9
24.9
25.7
23.9
23.4
27.8
Field
Turbidity
(N.T.U.)
N
NA
NA
2.75
0.60
NA
2.38
NA
NA
NA
NA
NA
5.4
4.86
2.57
NA'
2.23
NA
NA
NA
Cadmium
fog/i)
[10]
U
<0.1
<0.1
0.3
0.4
0.3
<0.1
<0.1
<0.1
<0.1
<0.1
0.1
1.9
0.3
0.3
0.2
0.1
<0.1
<0.1
0.1
F
<0.1
<0.1
<0.1
0.3
0.2
<0.1
<0.1
<0.1
<0.1
<0.1
0.1
1.9
0.3
0.2
0.2
<0.1
<0.1
<0.1
<0.1
Chromium
(M9/I)
[50]
U
<1
2
12
2
11
20
4
1
1
<1
2
13
<1
2
4
7
5
1
<1 .
F
<1
3
9
1
2
6
6
1
1
<1
2
15
<1
<1
4
6
4
<1
<1
Lead
(^gfl)
[15]
U
<1
<1
12
1
3
4
2
2
<1
<1
•<1
18
4
3
2
<1
6
4
<1
F
<1
<5
<5
1
2
<1
<1
<1
3
<1
<5
17
2
2
3
<1
1
<1
<1
Sodium
(mg/l)
N
U
NS
20
20
21
22
19
21
22
16
NS
1.2
1.0
NS
4.1
1.8
2.8
8.3
10
31
F
NS
20
NA
22
22
19
21
22
16
NS
1.1
NA
NS
3.8
1.9
2.7
6.2
10
30
Sullate
(mg/l)
N
U
NS
1.4
2.7
<1
4.2
4.4
8.6
5.0
<1
NS
5.5
<1
NS
<1
<1
5.7
8.0
12
42
F
NS
<1
NA
<1
3.9
4.1
8.8
5.0
<1
NS
5.8
NA
NS
<1
2.6
2.9
10
10
53
N = No Standard, U= Unfiltered, F = Filtered. NA = Not Analyzed, NS = Not Sampled
[ 1 = E.P.A. Cleanup Level
-------
Table 2 (continued)
OFF-SITE SURFICIAL AQUIFER WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor
Well
MW-23
Date
Sampled
08-31-92
10-26-92
01-26-93
04-26-93
07-26-93
10-27-93
01-24-94
04-23-94
09-01-94
Field
pH
(Units)
N
11.14
11.65
11.86
11.66
11.79
11.90
11.04
10.64
9.11
Field
Conductivity
(^mhos/cm)
N
6,300
4,500
6,600
5,600
NA
6,440
3,160
2.260
100
Field
Temperature
CO
N
27.0
27.2
23.1
23.5
25.1
25.1
24.0
24.0
27.2
Field
Turbidity
(N.T.U.)
N
NA
NA
29.0
8.7
NA
14.3
NA
NA
NA
Cadmium
(jig/I)
110]
u
<0.1
<0.1
0.2
0.2
0.5
0.1
0.3
<0.1
0.2
F
<0.1
<0.1
<0.1
0.3
0.2
<0.1
<0.1
<0.1
<0.1
Chromium
(«g/i)
[50]
U
12
1
11
3
3
10
4
2
2
F
12
1
9
3
1
8
5
2
<1
• Lead
(wg/D
[15]
u
<1
<1
4
5
<1
1
<1
7
3
F
<1
<5
3
4
3
1
<1
5
<1
Sodium
(mg/l)
N
U
NS
258
266
280
205
266
132
107
47
F
NS
264
NA
269
216
264
144
112
52
Sulfate
(mg/l)
N
U
NS
2,000
1,820
1,430
1,550
1,890
820
640
270
F
NS
1.940
NA
1,400
1,630
1,820
840
630
280
MW-24
08-31-92
10-26-92
01-26-93
04-28-93
07-28-93
10-27-93
01-24-94
04-24-94
09-01-94
9.29
9.88
9.44
9.96
9.63
11.07
8.98
8.26
9.01
3,100
2,700
3,610
3,910
3,660
3,890
3,350
1,344
<100
27.2
27.2
23.5
22.5
25.1
25.0
22.2
23.2
27.8
NA
NA
3.4
1.70
NA
12.2
NA
NA
NA
<0.1
0.3
1.3
0.3
0.5
0.1
0.2
0.2
0.5
<0.1
0.2
1.3
0.2
•=0.1
<0.1
0.2
<0.1
0.7
4
1
13
<1
13
9
8
1
2
2
<1
13
<1
8
8
7
<1
1
<1
2
16
3
1
2
<1
6
4
<1
2
6
3
<1
1
<1
2
7
NS
192
214
214
167
218
201
55
111
NS
185
NA
216
169
224
191
59
109
NS
1,240
1,260
1,690
1,350
1.490
1,080
424
740
NS
1,280
NA
1,510
1,420
1,360
1,250
428
730
N = No Standard, U= Unfiltered, F = Filtered, NA = Not Analyzed, NS = Not Sampled
( ] = E.P.A. Cleanup Level
-------
20
Table 2 (continued)
OFF-SITE SURFICIAL AQUIFER WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUISID SITE, TAMPA, FLORIDA
Monitor
Well
MW-2S
Date
Sampled
08-31-92
10-26-92
01-27-93
04-28-93
07-27-93
10-27-93
01-24-94
04-24-94
09-02-94
Field
pH
(Units)
N
9.80
8.72
8.60
7.42
8.77
. 7.45
8.72
6.98
7.02
Field
Conductivity
(^mhos/cm)
N
2.300
1,900
2,300
1,940
2,500
1,544
1,397
1,918
1,300
Field
Temperature
CO
N
28.2
27.8
22.8
23.2
26.5
26.0
222
24.0
27.2
Field
Turbidity
(N.T.U.)
N
NA
NA
6.7
0.78
NA
1.20
NA
NA
NA
Cadmium
kg/i)
[10]
U
<0.1
<0.1
O.1
0.2
<0.1
0.1
0.1
tO.1
<:0.1
F '
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
Chromium
(^gfl)
(50)
U
1
7
17
<1
5
10
6.
<1
1
F
<1
1
13
2
5
7
.4
<1
<1
Lead
W\)
(15]
U
<1
5
12
<1
4
1
<1
2
<1
F
<1
3
<5
2
<1
<1
2
<1
1
Sodium
(mgfl)
N
U
NS
73
83
64
92
39
35
37
22
F
NS
74
NA
65
97
40
40
35
22
Sulfate
(mg/l)
N
U
NS
634
870
640
630
370
424
514
338
F
NS
662
NA
510
610
260
402
524
384
I
1
MW-26
08-31-92
10-27-92
01-27-93
04-28-93
07-27-93
10-27-93
01-25-94
04-24-94
09-02-94
7.02
6.93
8.57
6.66
8.71
6.85
8.40
6.91
7.26
3,400
3,400
3,000
3,100
4,010
4,160
2,280
3,670
3,700
27.6
27.5
23.8
22.9
25.9
26.2
22.4
23.5
27.2
NA
NA
1.0
0.49
NA
1.85
NA
NA
NA
<0.1
•=0.1
<:0.1
<0.1
0.1
0.1
<01
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
23
5
12
1
8
12
8
5
4
8
4
12
<1
5
12
8
5
4
<1
<1
<1
<1
<1
<1
<1
2
2
<1
<5
<5
3
<1
<1
<1
2
<1
NS
670
482
482
132
746
356
676
669
NS
663
NA
502
126
748
358
660
679
NS
<1
<1
1.2
<1
15
<1
15
26
NS
<1
NA
2.1
<1
14
<1
14
28
MW-28'
01-28-93
04-26-93
07-27-93
6.36
6.92
6.71
700
570
957
. 223
21.6
24.6
30.2
2.43
0.2
0.2
0.1
<0.1
0.2
<0.1
12
4
3
5
2
3
7 '
12
11
3
4
3
41
29
109
NA
30
111
52
34
3.5
NA
37
2.0
N = No Standard. U= Unfiltered. F = Filtered, NA = Not Analyzed, NS = Not Sampled
[ ] = E.P.A. Cleanup Level
* Monitor Well MW-28 was installed on January 25, 1993 and removed on September 10, 1993
-------
21
Table 3
FIELD SPECIFIC CONDUCTANCE VALUES FOR
APRIL 1994 AND SEPTEMBER 1994 SAMPLING EVENTS
Monitor
Well
MW-12S
MW-13
MW-17
MW-22
MW-23
MW-24
MW-25
MW-26
Specific Conductance (umhos/cm)
April 1994
Field Measured
1,540
548
898
439
2,260
1,344
1,918
3,670
September 1994
Date
09-01-94
09-01-94
09-01-94
09-01-94
09-01-94
09-01-94
09-02-94
09-02-94
Field
Measured
200
400
700
300
100
100
1,300
3,700
Laboratory
Measured
1,200
580
1,000
480
1,000
2,400
1,300
3,400
-------
22
Table 4
OFF-SITE SURFICIAL AQUIFER QA/AC WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor
Well
Date
Sampled
Field pH
(Units)
N
Field Conductivity
(/jmhos/cm)
N
Field Temperature
(•C)
N
Field Turbidity
(N.T.U.)
N
Cadmium
fcg/i)
[10]
U
F
Chromium
(MU/i)
[50]
U
F
Lead
(«g/i)
[15]
U
F
Sodium
(mg/l)
N
U
F
Sultate
(mg/l)
N
U
F
EQUIPMENT BLANK
MW-28
MW-28
MW-13B
MW-22B
MW-29
MW-30
MW-30
MW-30
MW-30
MW-30
08-28-92
10-26-92
01-26-93
03-22-93
04-26-93
07-26-93
10-26-93
01-24-94
04-23-94
09-01-94
6.10
6.50
8.75
7.60
NA
4.51
7.03
4.74
6.0
NA
580
500
100
800
NA
20
150
13
29
NA
27.0
25.0
21.0
22.0
NA
31.5
25.8
17:5
24.8
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
<0.1
<0.1
0.3
0.2
0.2
0.3
O.1 .
0.3
0.1
<0.1
<1
O.1
0.2
<0.1
0.2
0.3
0.1
<0.1
0.1
0.1
<1
<1
17
2
<1
3
6
3
<1
<1
<1
<1
16
<1
<1
5
7
3
<1
<1 .
<1
<1
4
4
<1
<1
4
3
<1
<1
<1
<5
3
<5
4
2
3
2
<1
<1
NS
0.11
1.9
NS
0.11
<0.05
O.05
0.29
0.62
0.14
NS
0.10
NA
NS
0.20
0.05
O.OS
0.39
0.12
0.09
NS
<1
<1
NS
<1
<1
<1
<1
<1
<1
NS
<1
NA
NS
<1
<1
<1
<1
<1
<1
DUPLICATE SAMPLE
MW-12D(MW-12S)
MW-31 (MW-25)
MW-31 (MW-13S)
MW-31 (MW-2S)
MW-31 (MW-23)
MW-31 (MW-24)
01-28-93
07-27-93
10-26-93
01-24-94
04-23-94
09-01-94
6.50
8.77
5.50
6.72
10.64
9.01
1,100
2,500
540
1,399
2,260
115
22.0
26.5
26.2
22.2
24.0
27.8
2.2
NA
NA
NA
NA
NA
0.3
0.2
<0.1
<0.1
<0.1
0.1
0.2
O.1
0.1
O.1
O.1
0.3
12
6
8
5
2
2
12
14
7
5
1
<1
6
3
<1
1
8
2
5
3
2
3
<1
5
70
90
39
36
101
110
NA
90
41
38
112
107
330
735
124
408
680
770
NA
730
53
462
690
720
N = No Standard, U= Unfiltered. F = Filtered, NA = Not Analyzed, NS = Not Sampled
[ ] = E.P.A. Cleanup Level
-------
Table 4 (continued)
OFF-SITE SURFICIAL AQUIFER QA/AC WATER QUALITY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor
Well
Date
Sampled
Field pH
(Units)
N
Field Conductivity
Oimhos/cm)
N
Field Temperature
(•C)
N
Field Turbidity
(N.T.U.)
N
Cadmium
(csl)
[10]
U
F
Chromium
fogfl)
ISO]
U
F
Lead
<*ofl)
[15]
U
F
Sodium
(mg/l)
N
U
F
Sulfate
(mg/l)
N
U
F
ANAL YTE-FREE WATER
62-CH-1
MW-30
MW-32
MW-33
MW-32
MW-32
MW-32
MW-32
MW-33
03-01-93
04-26-93
07-26-93
07-27-93
10-26-93
01-24-94
04-23-94
09-02-94
09-02-94
6.07
NA
5.97
5.62
7.10
5.38
5.20
7.03
7.16
350
NA
90
130
125
4
27
200
213
NA
NA
33.3
35.7
25.2
18.1
24.3
26.7
28.7
NA
NA
NA
NA
NA
' NA
NA
NA
NA
0.2
0.1
0.5
1.1
0.2
0.1
<0.1
0.1
<0.1
NS
0.1
0.3
1.1
NS
NA
NA
NA
NA
3
<1
5
3
6
1
<1
<1
<1
NS
1
4
5
NS
NA
NA
NA
NA
1
<1
<1
2
3
<1
<1
<1
<1
NS
2
<1
1
NS
NA
NA
NA
NA
NS
<0.05
<0.05
<0.05
<0.05
0.28
0.66
0.05
0.18
NS
0.14
<0.05
<0.05
NS
NA
NA
NA
NA
NS
<1
<1
<1
<1
<1
<1
<1
<1
NS
<1
<1
<1
NS
NA
NA
NA
NA
N = No Standard, U= Unfiltered, F = Filtered, NA = Not Analyzed, NS = Not Sampled
[ ] * E.P.A. Cleanup Level
-------
24
Table 5
OFF-SITE SURFICIAL AQUIFER PRECISION AND ACCURACY DATA SUMMARY
62ND STREET SUPERFUND SITE, TAMPA, FLORIDA
Monitor Well
MW-12S
MW-13S
MW-17
MW-24
MW-25
MW-26
Date Sampled
10-27-92
10-27-92
10-27-92
10-26-92
10-26-92
10-27-92
Precision
Measurement No. 1
Field pH
(Units)
6.60
5.90
6.52
9.68
8.72
6.93
Field Conductivity
(^mhos/cm)
1,340
530
1,190
2,700
1.900
3,400
Measurement No. 2
Field pH .
(Units)
6.61
. 5.90
6.52
9.88
8.73
6.93
Field Conductivity
(^mhos/cm)
1330
540.
1190
2700
1900
3400
Accuracy
Measured
Field pH
(Units)
6.02
5.98
6.00
6.00
6.00
6.00
Standard
Field pH
(Units)
6.00
6.00
8.00
6.00
6.00
6.00
Percent
C*>
100
100
100
100
100
100
MW-12S
03-22-93
6.60
1,021
6'.78
1030
6.20
6.00
97
-------
62nd
STREET
SITE
II
I!
II
D
Q O
"n°
A -
60
ri a
O
c
n
II
II
CD <=>
— «->m i 1 i — i n n 1 — 1 C3 A
[Hm Q ' — ' "— ' n y U . *$
( . 1 man a
. ClW£NE ST.
czi0 ».Mw-i6 n
a
a
D D
a =•
a D
• MW-12S
a ' .
^ i — . MW-17
| LJ •nr-iH
=> n
f-f=3 U 1
r-I]M 1 1
cn
MW-18* . •
ifpg-ao QCD =. n
u LJ • o
MONITOR WELLS LOCATIONS
LEGEND
• FS SHALLOW WELL
A RI SHALLOW WELL
4- RD MONITOR WELL
25
Ardaman & Associates, Inc.
Geotechnicol, Environmental and
Materials Consultants
OFF-SITE GROUhTOWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE
HILLSBOROUGH COUNTY, FLORIDA
Rl£ NO.
93-029
-------
Responsiveness Summary
-------
RESPONSIVENESS SUMMARY
U.S. Environmental Protection Agency (EPA established a public
comment period from May 23, 1995, through June 23, 1995 for
interested parties to comment on the proposed Amendment to the
Record of Decision at the 62nd Street Dump Superfund Site (Site).
During the comment period, EPA conducted a public meeting on May
23, 1995, at the Kenley Park Community Center in Tampa, Florida.
The meeting presented the results of the off-site groundwater .
monitoring program which showed that, the contaminants of concern
in the. surficial aquifer have been measured consistently below
1990 Record of Decision cleanup goals. During the public
meeting, the community was informed of the availability of a
Technical Assistance Grant (TAG).
A responsive summary is required by Superfund policy to provide a
summary of the citizens' comments and concerns about the Site, as
raised during the public comment period, and responses to those
comments. All comments from the public have been considered and
factored into the decision to amend the selected remedy.
Three major questions were asked during the public meeting on May
23, 1995.
l. One citizen inquired about.the nature of the remedy he asked
about the "Cement Cap?".
EPA Response: The selected remedy includes a soil/sand/clay
cap with a high density polyethylene cover and the
solidification of all non-cement wastes and contaminated
soil with cement. These components are two distinctly
different parts of the selected remedy. The
Solidification/Stabilization of the non-cement wastes and
contaminated soils with approximately 35% cement lasted from
December 1994 through May 1995. The Landfill Cap and
vegetative cover was completed in. June of 1995. .
2. At the meeting, someone asked "what is the future scope of
that land?". The citizens were concerned about the possible
future uses of the site.
EPA Response: Deed restrictions will be placed on the Site.
The integrity of the cap must be protected. Digging on the
site will be restricted to six inches. The property owners
and other Potentially Responsible Parties are responsible
for maintaining the site and its integrity. Currently, the
site has been zoned residential. Property zoning is under
the jurisdiction of Hillsborough County. The site will be
prohibited from becoming a landfill through these
restrictions.
3. The citizens voiced concern that the property north of the
-------
62nd Street Dump may have contaminates in its groundwater or
surface water.
EPA Response: Monitor wells (one in the north-east corner
of the site - MW-7S and the other directly north of the site
- MW-15) were sampled as part of the Remedial Investigation
were found to have levels comparable to a normal sample. In
fact, MW-15 is considered a background/normal sample. The
Kasouf-Kimerling Site is another Superfund site which is
located to north-west with respect to the 62nd Street Dump.
The Kimerling site is currently being cleaned up, also.
In general, the public has no objections to the amendment to the
selected remedy.
-------
Appendix 1
Graphical Representations of
Groundwater Quality Data
-------
12.0
z,ao
S> 6.0
8
Q
5
E.PA CLEAN-UP LEVEL
* i
08-31-82 10-27-02 01-28-03 01-28-93* 03-22-63
04-20-03
DATE
07-27-03 10-26-83 01-25-94 04-24-94 09-01-04
O)60
•C*
I"
CC 40
UJ
O 30
z
8
5
D
O
CC
O
20
10
E.PA CLEAN-UP LEVEL
* .*
01-28-93* 03-22-03
04-26-B3
DATE
07-27-03 10-26-03 01-25-04 04-24-O4 00-01-94
E.PA CLEAN-UP LEVEL
08-31-O2 10-27-02 01-26-03 01-26-03* 03-22-03
04-20-03
DATE
07-27-O3 10-26-03
04-24-O4 09-01-04
UNFILTERED
FILTERED
* BELOW DETECTION LIMIT
# DUPLICATE SAMPLE
CADMIUM, CHROMIUM AND LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-12S
Andaman & Associates, Inc.
Geotochnlcal, Environmental and
Materials Consuttarrt«
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
RUNO-
93-025
-------
08-31-92 10-27-92 01-26-93 01-28-93* 03-22-93 04-26-93 07-27-93 1O-26-93 01-25-94 04-24-94 09-O1-04
DATE
08-31-92 10-27-92
01-26-93 01-28-93* 03-22-93 04-26-03 07-27-93 10-2643 01-25-84 04-2444 09-01-04
DATE
UNFILTERED
FILTERED
NS NOT SAMPLED
NA NOT ANALYZED
# DUPLICATE SAMPLE
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-12S
Ardaman & Associates, Inc.
Gaotechnteal, Environmental and
Material* Consultant
OFF-SITE QROUNOWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
-------
08-31-62 10-27-82 01-20-03 01-26-83* 03-22-03 04-26-03 07-27-03
DATE
10-26-93 01-25-04 04-2444 00-01-04
06-31-62
10-27-02 01-26-03 01-28-83* 03-22-03 04-26-03 07-27-03
DATE
10-26-03 01-25-04 04-24-04 09-01-04
DUPLICATE SAMPLE
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-12S
Ardaman & Asaoclatea, Inc.
Geotochnlcal, Environmental and
Materials Corwuttante
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY, FLORIDA
mi NO.:
•3425
-------
. 12.0
ziao
8
i 2.0
0.0
E.PA CLEAN-UP LEVEL
0)60
3
O 5°
F
CC 40
LU
O 30
8
20
iio
g
X 0
o
20
O
I
LU
O
8
'5
0*2642
10-27-02
* ,
01-27-83
10-2643* 01-24-04
04-20-04 0*0144
EPA CLEAN-UP LEVEL
08-28-82 10-27-92 01-2743 04-2643 07-2043 10-28-03
DATE
10-20-03*
01-24-04
04-20-04
0*0144
E.PA CLEAN-UP LEVEL
08-2642 10-2742 01-2743 04-20-03 07-2643 10-20-03
DATE
10-20-83* 01-24-04
04-26-04
004144
UNFILTERED
FILTERED
BELOW DETECTION LIMIT
DUPLICATE SAMPLE
CADMIUM, CHROMIUM AND LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-13S
Ardaman & Associates, Inc.
Geotachnteal. Envbonnwntal and
Materials Consultants
OFF-SITE QROUNDWATCR
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY. FLORIDA
-------
08- 26-82
10-27-82
01-27-83
04-26-83
07-28-83 10-26-83
DATE
10-26-93* 01-24-84
04-26-94
09-01-04
,NS
08-28-82 10-27-82
01-27-83
04-26-83
07-28-93 10-26-83
DATE
10-26-8341 01-24-84
04-26-04
00-01-04
• UN FILTERED
H FILTERED
NS
• NA
#
NOT SAMPLED
NOT ANALYZED
DUPLICATE SAMPLE
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-13S
Ardaman & Associates, Inc.
Geotechnlcal, Environmental and
Materials Consultant*
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
RLE NO.:
93-025
-------
c
X
Q.
14.0
12.0
' 10.0
ao
e.o
9
LU
LL 4.0
2.0
0.0
08-26-92 10-27-82 01-27-93 04-20-93 07-28-83 10-26-83
DATE
10-26-93* 01-24-84 04-26-94
0*01-84
08-28-92
10-27-92
01-27-93
04-26-93
07-28-93 10-2643
DATE
10-264311* 01-24-04 04-26-84
0941-04
DUPLICATE SAMPLE
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-13S
Ardaman & Associates, Inc.
Geotochnteal, Environmental and
Materials Consultant*
OFF-SITE GROUNOWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
BLINOJ
93-025
-------
j/l) CADMIUM CONCENTRATION (ug/l)
1 o M * a CD p M
o o o o o o o
I50
LEAD CONCENTRATION (ug/l) CHROMIUM CONCENTJ
00,5588 0088*
E.PA. CLEAN-
UP LEVEL
*.. _* _
* , * ,
08-28-92 10-27-92 01-26-93 04-26-93 07-2843 10-2643 01-24-94 04-24-94 094144
DATE
E.P A. CLEAN-UP LEVEL
* , * Mrfw-Sftl BH ' 1 ^ -: ^BTTTOSI HH .' i ^HsiSSa . _
i i i
08-2842 10-27-92 01-2643 04-2643 07-2843 10-2643 01-2444 04-24-94 094144
DATE
E.PA. CLEAN-UP LEVEL
•
i
1. _ mm B* •* •.
* PHI
06-28-92 10-2742 01-2643 04-2643 07-2843 10-2643 01-24-94 04-2444 094144
DATE
5 FILTE™ '* BELOW DETECTION L.M..T
•^J"
CADMIUM, CHROMIUM AND LEAD
Ardaman & Associates, Inc.
Gaoteehnlcal, Environmental and
Material* Consultant*
CONCENTRATIONS IN OFF-SITE TSSSSSS^SS^
MONITOR WELL MW-17 X?rBo^PHEao^,^orAPA
OHUMHttBKB/.ICHECpDi/SftB fat* t*5&94
RUMO.:
93-025
mm^m^
-------
20
O>
o,s
UJ 10
8
I
CO
10-27-02
01-26-03
04-2643
07-26-03 10-26-83
DATE
01-24-84
04-24-04
00-01-04
* , *
OB-28-02
01-2643
04-2643
07-2843 10-2643
DATE
01-2444
04-2444
004144
UNFILTERED
FILTERED
* BELOW DETECTION LIMIT
NS NOT SAMPLED
NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-17
Ardaman & Associates, Inc.
G6otochnlcAlt Eitvtronirwntal And
Material* Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY, FLORIDA
-------
14.0
12.0
mo
a.
Q e-o
UJ
a: 4.0
2.0
0.0
08-28-02
1O-27-02
01-26-03 04-26-93
07-28-03 10-26-03 01-24-04
DATE
04-24-04
00-O1-04
08-26-92
10-27-92
01-26-93
04-26-93
07-28-93 10-26-93
DATE
01-24-94
04-24-94
09-O1-04
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-17
Ardaman & Associates, Inc.
Gaotochnlcal, Environmental and
Material* Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUNO SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
me NO;
93-O25
-------
O)
3
o
F
12.0
10.0
8.0
o 4-°
I 2.0
s
0.0
EPA CLEAN-UP LEVEL
* I *
06-31-02 10-2642 01-20-83 03-22-03 04-20-03 07-2043
DATE
10-26-03
01-24*4
04-23-04
00-01-04
0)00
I"
5 40
LU
O 30
8
20
EPA CLEAN-UP LEVEL
08-31-02
0»O144
EPA CLEAN-UP LEVEL
O8-31-O2 10-2042 01-2043 03-2243 04-2043 07-2043 10-2043 01-2444 04-2344
UNFILTERED
FILTERED
BELOW DETECTION LIMIT
CADMIUM, CHROMIUM AND LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-22
Ardaman & Associates, Inc
Geotochnlcal, Environmental and
Material* Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY, FLORIDA
iyg-94
-------
eo
I45
30
i
w
IS
NS,NS
08-31-62
10-26-92
NA NS,NS
01-26-93 03-22-83 04-26-83 07-26-83 10-26-93 01-24-94 04-23-94
DATE
00-O1-94
* , NA NS. NS
08-31-92
10-26-92
01-26-93 03-22-93 04-26-93 07-26-93
DATE
10-26-93
01-24-94
04-23-94
09-01-04
UNFILTERED
FILTERED
* BELOW DETECTION LIMIT
NS NOT SAMPLED
NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-22
Ardaman & Associates, Inc.
GaotochnlcoJ, Environmental and
Materials Consuttante
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY. FLORIDA
Oman*re 8KB
-------
08-31-92
10-26-92
01-26-93
03-22-93
04-26-93 07-26-93
DATE
10-26-93
01-24-94
04-23-94
09-01-94
08-31-92 10-26-92 01-28-03 03-22-93 04-28-93 07-28-93 10-28-93 01-24-94 04-23-94 09-01-94
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-22
Ardaman & Associates, Inc.
GaotochnleeJ, Environmental «nd
Materials Consultants
OFF-SITE OROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE. TAMPA
HILLSBOROUQH COUNTY, FLORIDA
-------
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06-31-62 10-26-92 01-2643 04-2643
07-2643 10-27-03 01-24-94
DATE
04-2344 094144
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FILTERED
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NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-23
Ardaman & Associates, Inc.
Geotochnlcal, Environmental and
Materials Corwuttanto
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUNO SITE. TAMPA
HILLSBOROUQH COUNTY, FLORIDA
HLIHOj
93-O25
-------
08-31-02
10-26-92
01-26-83
04-26-93
07-20*3 10-27*3
DATE
01-24-84
04-23*4
09-01-04
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08-31-02
10-26-02
01-26-93
04-26-83 07-26-83 10-27-03
DATE
01-24-84
04-23-84
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pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-23
Ardaman & Associates, Inc.
Gootechnteal, Environmental and
Materials Con»u«antB
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
RUNOJ
93-025
-------
CO
BELOW DETECTION LIMIT
CADMIUM, CHROMIUM AND LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-24
-------
'300
08-31-02 1020-82 01-20-83 04-26-93 07-28-83 10-27-03 01-24-04 04-24-84 0*01-84
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DATE
• UNFILTERED
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NS NOT SAMPLED
NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-24
Ardaman & Associates, Inc.
Gootachnteal. Environmental and
Materials Consultant!
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HIUSBOROUQH COUNTY, FLORIDA
RLtNO.-
•3-028
-------
08-31-82 10-26-92 01-26-93 04-26-93 07-26-93 10-27-93 01-24-94 04-24-94 09-01-94
08-31-92 10-26-92 01-26-93 04-26-93 07-26-93 10-27-93 01-24-94 04-24-94 09-01-84
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-24
Ardaman & Associate*, Inc
Gaotechnlcal, Environmental and
Material* Consuttanti
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
-------
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06-31-82 10-26-92 01-27-03 04-20-03 07-27-03 07-27-03*
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04-2444
EPA. CLEAN-UP LEVEL
08-31-02 10-26-02 01-27-03 04-20-O3 07-27-83 07-27-O3* 10-27-03 01-24-04 04-24-04 08-O2-O4
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# DUPLICATE SAMPLE
CADMIUM, CHROMIUM AND LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-25
Ardaman & Associates, Inc.
Gaotachnlcal, Envtronnwntal and
Materials Consuttarrts
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY. FLORIDA
RLINO.'
93-O25
-------
100
08-31*2
10-26*2
01-27-83
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08-31-02 10-27-02 01-27-03 04-2643 07-27-03 10-27-03
DATE
01-2544 04-2444
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BELOW DETECTION LIMIT
LEAD
CONCENTRATIONS IN OFF-SITE
MONITOR WELL MW-26
-------
8
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10-27-02
01-27-03
04-26-03
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DATE
01-25-04
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08-31-02 10-27-82 01-27-03 04-26-03 07-27-03
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* BELOW DETECTION LIMIT
NS NOT SAMPLED
NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-26
Ardaman & Associates, Inc.
Geotachnleal, Environmental and
Material* Consultant
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY, FLORIDA
93-025
-------
08-31-02
10-27-02
01-27-03
04-26-03
07-27-03 10-27-03
DATE
01-2544
04-24-04
0942-04
08-31-02
10-27-02
01-27-83
04-2643
07-27-03 10-27-03
DATE
01-25-04
04-24-O4
0942-04
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-26
Ardaman & Associate*, Inc.
Geotechnlcal, Environmental and
Material! Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COUNTY, FLORIDA
HUMOJ
93-O2S
-------
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DATE
EPA CLEAN-UP LEVEL
01-28-03 04-2643 07-27-03
DATE
UNFILTERED
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MONITOR WELL MW-28
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1 "*
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SODIUM AND SULFATE CONCENTRATIONS
IN OFF-SITE MONITOR WELL MW-28
Ardaman & Associate*, Inc.
G«otachnlcal, Environmental and
Material* Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY. FLORIDA
I-M
BUMOJ
93-O25
-------
01-2843 04-26-83 07-27-03
DATE
01-26*3
04-28-83
07-27-03
DATE
pH AND CONDUCTIVITY VALUES
IN OFF-SITE MONITOR WELL MW-28
Ardaman & Associates, Inc.
Gaotachnteal, Environmental end
Material* Consultants
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
93-025
-------
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08-2842 10-2842 01-2843 03-2243 04-2843 07-2843 10-2843 01-2444 04-2344 004144
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NS NOT SAMPLED
NA NOT ANALYZED
SODIUM AND SULFATE CONCENTRATIONS
IN EQUIPMENT BLANKS
Ardaman & Associates, Inc.
Gaotochnlcal, Environmental and
Materials Corauttanti
OFF-SPTE OROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH COyNTY, FLORIDA
93-O26
-------
01-26-83 03-22-03 04-2643 07-2643 10-20-03 01-24-O4
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04-2344 0*0144
08-2842 10-26-02 01-2643 03-22-93 04-2643 07-2643 10-2643 01-2444 04-23-04 094144
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pH AND CONDUCTIVITY VALUES
IN EQUIPMENT BLANKS
Ardaman & Associates, Inc.
Geutechnlcal, Environmental and
Material* Consultant*
OFF-SITE GROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBORpUGH COUNTY. FLORIDA
-------
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IN ANALYTE-FREE WATER SAMPLES
Ardaman & AMoclatea, Inc.
GeotochnlcaJ, EnvtromnwrtBl and
Material* Corauttanti
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUGH COUNTY, FLORIDA
ma no;
99-025
-------
03-01-«3 04-2643 07-20-03 07-27-03
10-26-83
DATE
01-24-04 04-23-04
OOO8-04
09-02-84
0341-03 04-26-83 07-2W3 07-27-03
10-28-03 01-24-04
DATE
04-23^4
OMB-04
CWO2-04
NA NOT ANALYZED
pH AND CONDUCTIVITY VALUES
IN ANALYTE-FREE WATER SAMPLES
Ardaman & Associate*, Inc.
G«otechnlcal, Envtronmwrtal and
Material* Consultant*
OFF-SITE QROUNDWATER
MONITORING PROGRAM
62nd STREET SUPERFUND SITE, TAMPA
HILLSBOROUQH CQUNTY, FLORIDA
93-O2S
------- |