NCD003188844_19940217_Carolina Transformer_FRBCERCLA RD_Draft Remedial Design Work Plan-OCR

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ARCS IV Remedial and Enforcement Response
Activities at Selected Uncontrolled
Hazardous Waste Sites
~ Environmental Protection Agency Region IV W Contract No. 68-W9-0055 .
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DRAFT
REMEDIAL DESIGN WORK PLAN
for the
Carolina Transformer Site
Fayetteville, North Carolina
RECEDVED
FEB 2.3 1994
SUPERFUNO SECTION
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DRAFT
REMEDIAL DESIGN WORK PLAN
Volume 1
Carolina Transformer
Fayetteville, North Carolina
Prepared for
U.S. ENVIRONMENTAL PROTECTION AGENCY
Region IV
EPA Work Assignment NQ 18-4NC2
Prepared by
BLACK & VEATCH WASTE SCIENCE, INC.
Atlanta, Georgia
February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section TOC
Revision No.: 0
Date: February 17, 1994
Page 1 of 2
CONTENTS
Page N"
1.0 INTRODUCTION ...................................... .
2.0 SITE BACKGROUND INFORMATION ..................... .
2.1 SITE DESCRIPTION ................................ .
2.1.1 Location and Topography ....................... .
2.1.2 Demography and Land Use ...................... .
2.1.3 Hydrogeology ................................ .
2.1.4 Hydrology ................................... .
2.2 DAT ABASE REVIEW .............................. .
2.2.1 Site History .................................. .
2.2.2 Remedial Investigation Results .................... .
2.2.3 Baseline Risk Assessment ....................... .
2.2.4 Feasibility Study .............................. .
2.2.5 Record Of Decision (ROD) ...................... .
2.2.6 Post-RI/Pre-RD Investigation ..................... .
3.0 REMEDIATION GOALS AND DESIGN CONSIDERATIONS .... .
3.1 REMEDIATION OBJECTIVES ....................... .
3.2 SOILS/SEDIMENT EXCAVATION AND BUILDING
DEMOLITION ................................... .
3.2.1 Quality Assurance Plan ......................... .
3.2.2 Health and Safety Plan ......................... .
3.2.3 Easements ................................... .
3.2.4 Leachate and Infiltration Control of Stockpiled Soils ... .
3.3 SOILS/SEDIMENT TREATMENT .................... .
3.3.1 Quality Assurance Plan ......................... .
3.3.2 Health and Safety Plan ......................... .
4.0 SCOPE OF SERVICES .................................... .
4.1 TASK 1 -PROJECT PLANNING ..................... .
4.1.1 Pre-design Coordination Meetings ................. .
4.1.2 Performance Standards Determination .............. .
4.1.3 Prepare Draft and Final Work Plan ................ .
4.1.4 Deliverables .................................. .
4.2 TASK 2 -DESIGN PREPARATION & SOLICITATION FOR
SOIL EXCAVATION & BUILDING DEMOLITION ....... .
4.2.1 Preliminary Design and Presentation ............... .
4.2.2 Draft (95%) Design Submittal .................... .
4.2.3 Final Design and Bid Package .................... .
4.3 TASK 3 -DESIGN PREPARATION AND SOLICITATION
FOR SOIL TREATMENT SYSTEM .................... .
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Draft Work Plan
Carolina Transformer Site • Remedial Design
ARCs IV · EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section TOC
Revision No.: 0
Date: February 17, 1994
Page 2 of 2
Page N'
4.3.1 Draft Performance Specifications & Bid Package . . . . . . . . 4-9
4.3.2 Final Performance Specifications & Bid Package . . . . . . . 4-10
4.4 TASK 4. TECHNICAL SUPPORT
4.4.1 Community Relations & Support . . . . . . . . . . . . . . . . . . . 4-10
4.5 TASK 5 · WORK ASSIGNMENT MANAGEMENT ........ 4-10
4.5.1 Project Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
4.5.2 WA Closeout........................ . . . . . . . . . . 4-11
5.0 SCHEDULE AND DELIVERABLES . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
6.0 ESTIMATE OF COSTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
7.0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
FIGURES
Figure 2-1
Figure 2-2
TABLES
Table 2-1
Table 2-2
Table 4-1
Table 5-1
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Following Page N'
Site Location Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Site Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Page N'
Risk Assessment Contaminant and Media of Concern . . . . . 2-9
Feasibility Study Alternatives Evaluated . . . . . . . . . . . . . . 2-10
Preliminary Remediation Goals for Soil and Sediment . . . . 4-3
Remedial Design Schedule . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
1.0 INTRODUCTION
Section 1.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 2
In support of EPA Region IV, Black & Veatch Waste Science, Inc. (BVWS) has
prepared this Work Plan (WP) describing the design activities to be performed for
the remediation of soils at the Carolina Transformer Superfund site. This work plan
is in response to EPA Work Assignment No. 18-4NC2, Revision No. 3 dated
December 20, 1993 and executed by BVWS on January 20, 1994. The design
activities are in general compliance with the Record of Decision Remedial
Alternatives Selection document for the site executed by EPA Region IV Regional
Administrator Greer Tidwell on August 29, 1991.
The Carolina Transformer site is located in Cumberland County, North Carolina,
approximately one mile northeast of Fayetteville. The site address is 301 North
Eastern Boulevard, which is just north of the intersection of U.S. Highway 301 and
River Road. The approximate U.S. Geological Survey (USGS) coordinates of the site
are latitude 35° 03' 08"N and longitude 78° 50' 07"W and the site is approximately 4.5
acres in size. Surrounding the site are several private homes, small industrial and
commercial establishments, agricultural land, and a sand and gravel operation north
of the site.
The Carolina Transformer Company began recycling electrical transformers in 1967.
During the course of its activities, the company handled and stored large numbers of
electrical transformers at the site which contained dielectric fluids laden with
polychlorinated biphenyls (PCBs). Operations ceased in the early 1980's, and all
facilities on the property are currently vacant.
Evidence of contamination of 2 local drinking water wells by chlorobenzene, a PCB
carrier solvent, was first documented by the North Carolina Department of Natural
Resources and Community Development, Division of Environmental Management
(DEM) in 1978. Subsequent analyses by DEM and EPA Region IV detected PCBs
and chlorobenzenes in groundwater, soil, surface water, and sediment samples. Based
on sampling results, an immediate removal action was initiated by EPA Region IV
on August 13, 1984 and completed on August 22, 1984. Cleanup consisted of
51832.711/WP February 17, 1994
Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 1.0
Revision No.: 0
Date: February 17, 1994
Page 2 of 2
dewatering a contaminated swampy area of the site and the excavation and
solidification of remaining PCB/oil sludge with offsite disposal of the solidified wastes.
The excavated areas were backfilled with approximately 588 tons of clean soils.
Approximately 975 tons of PCB-contaminated material was removed and disposed
of at the Emelle, Alabama facility operated by Chemical Waste Management.
EPA commenced the remedial investigation of the site in August 1989 and completed
the four-phased investigation in August 1990. The Baseline Risk Assessment and
subsequent Feasibility Study were completed by March 1991 and the Record of
Decision was issued in August 1991.
This Remedial Design Work Plan is intended to delineate the design and support
activities necessary for excavation and soil treatment to comply with the Record of
Decision for the site. Groundwater remediation. has not been incorporated into
Revision 3 of the EPA Work Assignment, and is not addressed within this Work Plan.
The remedial design will provide a technical specification-based method for
excavation of contaminated soils, building demolition, and debris disposal, and a
performance-based system for soils remediation. The main components of the
proposed work efforts further described in Volume 1 of this Work Plan consist of the
following:
n Project planning
n Preparation of the design report and solicitation package for excavation
and demolition, including a preliminary design presentation, a draft
remedial design report, and final design
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Performance specification remedial design and solicitation package for
the soil treatment system
Technical support
Work assignment management
The rationale for each of the main components is also detailed in Volume 1. The
major deliverables, schedules, and supporting technical issues are contained in
Volume 1 of this Work Plan. Volume 2 of this plan contains all level-of-effort (LOE)
information broken out by task, cost data associated with the LOE including other
direct costs (ODCs), all supporting cost information, and subcontractor cost estimates.
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 13
2.0 SITE BACKGROUND INFORMATION
2.1 SITE DESCRIPTION
2.1.1 Location and Topography
The Carolina Transformer site is located in Cumberland County, North Carolina,
approximately one mile northeast of Fayetteville. The site address is 301 North
Eastern Boulevard, which is just north of the intersection of U.S. Highway 301 and
River Road (Figure 2-1). The approximate USGS coordinates of the site are latitude
35° 03' 0S"N and longitude 78° 50' 07"W.
The site consists of approximately 4.5 acres as determined by a property survey
conducted in February 1992. The site is relatively flat with topographic relief of only
6 feet. Elevations range from approximately 87 feet above mean sea level (msl)
along the northwestern boundary to approximately 93 feet above ms! along the
southeastern boundary. Access to the site is available from Middle Road along the
southeastern portion of the site, as shown on Figure 2-2. The area along the
northern boundary is a wooded/swampy area adjacent to an agricultural field and
several private residences. The western boundary of the site is adjacent to a dirt road
that provides access to two private residences. The southern boundary abuts Larry's
Sausage Company, Lundy Packing Company (operating the site as the Fayetteville
Livestock Market), and Middle Road. The eastern boundary adjoins an agricultural
field and an abandoned home site.
A building foundation and several vacant structures are located onsite. These
structures are situated within the northeastern portion of the site. The western
portion of the site is relatively open.
2.1.2 Demography and Land Use
Cumberland County North Carolina encompasses approximately 661 square miles
and, according to 1990 census data, has a population of 274,566 people. This number
correlates somewhat with the figures used in the Baseline Risk Assessment Report
filed in March 1991. That report used the 1980 census data and the population
51832.711/WP February 17, 1994
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FeYETTE'ILLE CARoL°i~,oc,s,noa <AP """· "·'· '""
' CUMBERLAND ANSFORMER COUNTY, NORTH CAROLINA
FIGURE
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SOURCE: MURPHY YELLE ASSOCIATES
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SITE MAP
CAROLINA TRANSFORMER SITE
FAYETTEVILLE, CUMBERLAND COUNTY, NORTH CAROLINA FIGURE 2-2
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 2 of 13
projections formulated by the North Carolina Office of State Budget and
Management. The projections presented in the Baseline Risk Assessment Report
indicated that the population of the County would increase to 261,839 by 1990 and
to 275,972 by 2000. Indications are the population growth is well ahead of the
previous projections and had almost attained the year 2000 projections in 1990. The
total number of housing units in the county is 98,360, according to 1990 census data .
The number of people residing within a one mile radius of the site is approximately
650, with an average household of 2 people, according to the Cumberland County
Joint Planning Commission.
The site is zoned heavy industrial, and land directly north, east, and south of the site
is zoned planned industrial, according to a master land use plan developed by the
Cumberland County Joint Planning Commission. The land east of the site is zoned
planned commercial according to the same master plan. Current land use is varied
and consists of a mixture of commercial, residential, and agricultural uses.
2.1.3 Hydrogeo/ogy
The Carolina Transformer site may be underlain by as many as three aquifers. These
aquifers, in ascending order, are the Cape Fear Formation, the Middendorf
Formation, and the alluvial deposits predominant in this region. The sands and clays
of the Cape Fear and the Middendorf Formations serve as aquifers in the Fayetteville
area. Wells completed in these formations can be screened across large intervals
which could cover sands and intervening clays. The sands in these zones provide
much higher sustainable yields and are the most productive strata in the region. The
fractured bedrock in the area is utilized for industrial water supply wells. A deep
bedrock well was used by Larry's Sausage Company adjacent to the site. This well
is 303 feet deep and is completed into the bedrock from 212 feet to its total depth .
Onsite, a soil boring was drilled to 120 feet in total depth during the post-RI
investigation in February 1993. A confining clay layer was first encountered at 15
feet below land surface and extended the total depth of the boring.
The shallow alluvial aquifer under the site is located at a depth of five to eight feet
below land surface and includes a fine to coarse grained sand layer which varies in
thickness from six to fifteen feet. This shallow aquifer appears to flow in a
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 3 of 13
northeasterly direction towards Locks Creek. The gray to blue-gray clay layer located
under the upper sands ( and found consistently both on and off the site) has
demonstrated low permeability during laboratory testing and apparently acts as a
confining layer separating the shallow aquifer from deeper water bearing zones. The
alluvial deposits of the shallow aquifer could provide significant yields for wells;
however, information reviewed indicates that this aquifer is not presently used as a
water supply in the area.
The site is situated in the Coastal Plain physiographic province of North Carolina.
Soils in this area are formed from crystalline materials such as granites, gneisses, and
schists. The soils consist primarily of brown to tan, fine to coarse grained sands, tan
silty sands, clayey sands, sandy clays, and clays. The surficial soils at the site consist
of the Wickham Series and the Roanoke Series. Wickham Series soils cover most of
the former facility area. These soils are well drained soils formed in loamy alluvial
sediments on terraces of the Cape Fear River and its tributaries. The loamy horizon
of this series is generally 40 to 60 inches thick, is underlain by sandy alluvial
sediments, and is well suited for cultivation. The sandy alluvial sediments are poorly
drained soils formed in stratified clayey sediments on terraces of the Cape Fear River
and its tributaries.
The Roanoke soils are somewhat poorly drained and typically have a surface layer
of grayish brown loam about eight inches thick. The subsoil averages about 4 7 inches
in thickness. Surface water runoff is slow, resulting in ponding in some areas during
wet periods and the seasonal high water table is at or near the surface.
2.1.4 Hydrology
The Carolina Transformer site is situated directly at or very near the headwaters of
an unnamed tributary that flows approximately one-half mile from the site to the
Cape Fear River. The Cape Fear River is located approximately 0.75 miles west of
the site, and is a Class C surface water body in the vicinity of the site, according to
DEM. The site lies within the 100-year floodplain for the Cape Fear River. Locks
Creek is located less than one mile east of the site, and is also a Class C surface
water body. The majority of surface runoff flows from the site into an 18-inch culvert
which runs along the southwest edge of the site. The culvert carries flow to a natural
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 4 of 13
stream channel approximately two feet wide, which in turn flows through a swampy
area to an unnamed tributary approximately four feet wide. This tributary flows from
the southwest corner of the site to the Cape Fear River. The remaining site drainage
flows to other drainage ditches along Middle Road, west to the Cape Fear River, and
east to Locks Creek.
2.2 DATABASE REVIEW
2.2. 1 Site History
Carolina Transformer Company was founded in 1958, according to a February 1985
Dunn and Bradstreet report. The first parcel of the site was deeded to Carolina
Transformer by Lizzie Talbot McDaniel on February 7, 1959. Carolina Transformer
Company was incorporated on May 6, 1959; however, 1965 was the first year the
Cumberland County Tax Office records identified the Carolina Transformer property
for tax purposes. The first indication of business operations at the site was the
presence of two large buildings depicted on the 1957 USGS quadrangle map. In
1967, Carolina Transformer Company sold 4.75 acres of their property to R. L.
Hon barrier.
According to the North Carolina Secretary of State's Corporate Division records, in
1979, Mr. Kenneth Strothers started a new transformer company named Faytransco
located in Fayetteville, North Carolina. According to EPA records, Carolina
Transformer Company relocated in April 1982 and changed its name to Faytransco,
Inc. In 1985 Faytransco was shut down and dissolved. On November 29, 1984, the
entire site was sold to Cumberland Electrical Repair, Inc. by Carolina Transformer.
A deed dated April 15, 1985 indicates that Cumberland Electrical Repair, Inc.,
operated at the site for only about four and one half months before being ordered
by the courts to return the property to Carolina Transformer Company.
Carolina Transformer began recycling electrical transformers and capacitors in 1967
and continued operations until 1982. During an interview on May 23, 1985, Mr.
Thomas Stevens of DEM indicated that at one time Carolina Transformer Company
was one of the largest firms of its type in the U.S., having clients throughout the
51832.711/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No, 18-4NC2; Rev, No, 3
southeastern U.S. along the east coast.
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 5 of 13
During the course of the transformer
rebuilding business, Carolina Transformer handled and stored large numbers of
electrical transformers at the site which contained oil and dielectric fluids laden with
PCBs. At no time during the operating period did Carolina Transformer Company
apparently operate as a PCB storage and disposal site for owners of PCB
transformers or PCB articles. However, it appears that as part of their rebuilding
and repair operations, PCB-laden fluids were drained from transformers and not
properly stored and managed.
In the late 1970's, the North Carolina Department of Natural Resources and
Community Development and EPA Region IV collected and analyzed numerous well
water samples from nearby homes. Samples were collected during three site
investigations from 1978 to 1979. The results of the analyses showed no evidence of
PCBs but did uncover evidence of chlorobenzene and other chemical compounds in
several of the wells. Surface water and soil/sediment samples were collected, in
addition to well samples, from suspected contaminated areas onsite. Analyses of
these samples confirmed the presence of PCBs.
After the company made no attempts to remove or control the contaminants
identified during the various site investigations, the EPA began an immediate removal
action on August 13, 1984. Cleanup consisted of dewatering the contaminated
swampy area of the site where PCB-contaminated surface water pooled and soaked
into the soils. Approximately 975 tons of PCB-contaminated material were excavated,
removed from the site, and transported to the Chemical Waste Management disposal
facility in Emelle, Alabama. The excavated areas were backfilled with
uncontaminated soils. The site has been vacant since 1986, and several
environmental investigations have been conducted since then .
2.2.2 Remedial Investigation Results
A three-phase field sampling and analysis program was conducted by Environmental
Services Division, Hazardous Waste Section (ESD-HWS), EPA Region IV between
August 1989 and January 1990. A draft RI report was issued in June 1990.
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
2.2.2. 1 Phase 1 RI
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 6 of 13
The Phase 1 field investigation activities were conducted in August 1989 and included
the collection of surface and subsurface soils (both onsite and offsite ), sediment
samples, surface water and groundwater samples, waste samples, and wipe samples.
All samples collected were analyzed for purgeable organics, acid and base/neutral
extractable organic compounds, pesticides, PCBs, and metals. In addition, selected
soil, sediment, and waste samples were analyzed for dioxins and furans.
During the Phase 1 investigation, ESD-HWS partitioned the site into 100 foot by 100
foot grid areas and collected soil samples from the approximate center of each grid.
Eleven temporary wells were installed at the approximate center of selected grids.
The wells were sampled, and piezometers were ·installed to monitor the groundwater
flow direction.
Offsite, a grid system was established consisting of 27 grid areas. Samples were
collected at depth intervals of O to 6 inches below land surface and 6 to 12 inches
below land surface from each of 25 of the grid areas at the approximate center of the
grid. Additionally, seven temporary wells were installed at the approximate center
of selected grids. Vadose zone samples were collected from each temporary well.
Five potable wells located to the north and the east of the site were also sampled.
Sixteen sediment samples were collected from on and around the site. Two sediment
samples were collected from Locks Creek, and nine samples were collected from the
drainage ditch which traverses the site and outlets in the wooded area southwest of
the site. Two samples were collected from the low lying area west of the site and one
sample was taken from a marsh area north of the site. Two samples were also
collected from the drainage ditches beside Middle Road.
A total of thirteen surface water samples were collected during the Phase 1 RI field
work. The sampling locations were the same as for the sediment samples, except that
no surface water samples were collected from the Middle Road drainage ditches and
only one sample was collected from Locks Creek.
51832.7)1/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 7 of 13
A total of four tanks and six transformers are located at the site. Also, a pit was
discovered in the main building. Three of the tanks, five transformers, and the pit
were sampled. One of the tanks and one of the transformers were empty, and so
were not sampled. Three buildings are present 6nsite, which were used as storage
and work areas. Three samples were scraped from the soil and debris remaining on
the floor of the main building. One composite soil/debris sample was scraped from
the floors of the three bays in the maintenance building, and one soil/debris sample
was collected from the small brick building used to burn insulation off wire and other
electrical components to recover the metals. Three wipe samples were also collected
from the walls inside the main building.
2.2.2.2 Phase 2 RI
The field activities associated with Phase 2 of the RI investigation were conducted in
November 1989. These activities included the collection of onsite surface and
subsurface soil samples. All samples collected were analyzed for PCBs. Using data
assimilated during the Phase 1 RI work, the site was divided into 50 foot by 50 grids
for sampling purposes.
A total of 123 samples were collected from 62 grid locations. Samples were collected
from O to 2 inches below land surface and 8 to 10 inches below land surface at each
grid location. 55 of these samples were collected for PCB analysis using a screening
method designed for an onsite laboratory.
2.2.2.3 Phase 3 RI
Five permanent monitoring wells were installed around the site during this phase of
the RI investigation. These well locations were surveyed, and a potentiometric
surface was developed. The general direction of the groundwater flow was
determined to be to the northeast toward Locks Creek. Samples were collected from
each of the wells, and were analyzed for purgeable organic compounds, acid
base/neutral extractable organic compounds, pesticides, PCBs, and metals.
An additional 55 soil samples were collected from 24 offsite locations. These samples
were predominantly taken in and adjacent to the drainage ditch south of the site.
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 8 of 13
Because the ditch was dry at the time of sampling, the samples were labeled as soil
samples. All soil samples were analyzed for PCBs only.
Results of the RI indicated significant contamination resulting from past site activities
and that further action was warranted.
2.2.3 Baseline Risk Assessment
The Baseline Risk Assessment for the site was completed in March 1991 by BVWS
under EPA Contract 68-W9-0055, Work Assignment No. 06-4LN3. The assessment
used data compiled during the RI investigations listed above and evaluated the risks
to human health and the environment from contaminants present at the site.
Contaminants presenting an elevated risk to human health and the environment were
identified and are listed in Table 2-1. Elevated risks were determined by comparison
of the Hazard Index computed for each exposure scenario to a threshold value of 1.
Carcinogenic risks were deemed excessive when the computed value for a risk
scenario exceeded the EPA benchmark range for Superfund sites of 1 x 10·4 to 1 x
10·6. Human health risks scenarios were quantitatively analyzed and ecological risk
scenarios were qualitatively analyzed.
The baseline risk assessment determined that elevated levels of several organic and
inorganic contaminants detected in the groundwater _presented excessive chronic and
carcinogenic risks to human health. Excessive carcinogenic risks from exposure to
onsite and offsite soils and sediments were also determined, and are due principally
to elevated concentrations of PCBs and dioxins/furans. The surface water
contamination was determined to be the result of cross-media contamination from
the contaminated soils and sediments in the area.
2.2.4 Feasibility Study
BVWS completed the Draft Feasibility Study for the Carolina Transformer site in
March 1991 under EPA Contract 68-W9-0055, Work Assignment No. 06-4LN3. The
feasibility study used the results of the previous RI investigations and the baseline risk
assessment to formulate options for the remediation of the site. Remedial
alternatives were selected to eliminate or reduce the risks to human health and the
environment resulting from contaminants present on and off the site and to comply
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 9 of 13
TABLE 2-1
RISK ASSESSMENT CONTAMINANT AND MEDIA OF CONCERN
MEDIA
CONTAMINANT GROUNDWATER SOIL SEDIMENT SURFACE WATER
Aluminum X
~ -----------------+------------. -------------------------------------Barium T X X ------------------+------------··--------1 ·---------1----------------Cadmium X X ~----------------------------------------------------~ -------------Chromium T X X
~ -----------------------------------------------------------------------~-X X X ------------------------------------------1 ·---------1----------------Copper X X X X ----------------------------------·--------1 ·---------~ -------------Lead X X ------------------+----------------------------------" -------------Manganese T X X X ~--------------------------------·--------1 ·---------1----------------Mercury X ------------------+---------------------1 ·---------1----------------Nickel T X ----------------------------------·--------1 ·--------~ -------------Strontium X X ---------------------------------------------1 ·---------1----------------Titanium X X
~ ------------------------------------------I· ·---------1----------------Vanadium T X ---------------------------------·--------· ·---------~ -------------Yttrium X X ------------------------------·--------, ·--------~ -------------Zinc T X X X ------------------------------·-·--------· ·---------~ -------------Trichloroethene X
----------------------------------------Tetrachloroethene x ------------------+--------------Bis(2-ethylhexyl) T,C -----------------------X
phthalate -----------------------------------------------------------~---------------Methyl ethyl ketone x ------------------------------------------------------------------------Toluene X X X
------------------f ------------------------------------------------------Carbon disulfide X X -----------------------------------·--------· ·---------~ -------------Benzene C X X ------------------~.--------------------------· ·---------• -------------Ch!orobenzene X X X ------------------------------------~------------------------------------1,2-Dichlorobenzene -1-----X ----------------------------~--------------------------------------1,3-Dichlorobenzene X X ------------------1----------------~ ·--------· ·--------~ -------------1,4•Dichlorobenzene C X ------------------·---------------: ·--------·--------· -------------1,2,4-Trichlorobenzene X X X -------------------1---------------·---------------------------------PCBs C C C C ----------------------------------------------------------------------Dioxins/furans C C
Notes: J -Noncarcmogemc Hazard Index > 1 i..; -Larcrnogemc H1sk > 1::-un
X = Detected at elevated level compared to background but does not pose a risk.
51832.711/WP February 17, I 994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 10 of 13
with applicable or relevant and appropriate requirements (ARARs). The quantities
of each media requiring remediation were also determined as part of the feasibility
study. Table 2-2 presents the remediation alternatives that were evaluated for each
medium during the feasibility study.
TABLE 2-2
FEASIBILITY STUDY ALTERNATIVES EVALUATED
GROUNDWATER G-1 No Action ------------------------+---------------------------------------------------------
If-------------------------
------------------------,,__ ________________ _
G-2 Deed Restrictions ---------------------------------------------------G-3 Metals Removal/Air Stripping/Adsorption/Discharge ---------------------------------------------------G-4 Metals Removal/Adsorption/Discharge -----------------------------------------------G-5 Ad so rpti an/Discharge If---------------------------------------------------------------------------------
SOIUSEDIMENT
G-6
G-7
S/S-1
Metals removal/UV Oxidation/Discharge
UV Oxidation/Discharge
No Action
If---------------------------------------------------------------------------S/S-2 Fence/Deed Restrictions -------------------------------------------------------------
I>-----------------------S/S-3
S/S-4
Excavation for Offsite Landfill
Excavation for Onsite Incineration ------------------------+-------------------------------------------------
STRUCTURES
DEBRIS/SOLID WASTE
S/S-5
S/S-6
S-1
S-2
S-3
S-4
D-1
Excavation for Onsite Chemical Dechlorination
Excavation for Onsite Solvent Extraction
No Action
Fencing
Partial Demolition
Complete Demolition
No Action
If-----------------------------------------------------------------------------
D-2 Fencing -----------------------------------------------------------0-3 Offsite Disposal
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
2-2_5 Record Of Decision (ROD)
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 11 of 13
The Record Of Decision Remedial Alternative Selection for the Carolina
Transformer site was signed by Greer Tidwell, Regional Administrator for EPA
Region IV, on August 29, 1991. The major components of the selected remedies for
groundwater and soil are as follows:
Excavation of the contaminated soil/sediment and use of a solvent
extraction process to separate organic contaminants such as PCBs,
dioxins/furans, volatile organics, and polynuclear aromatic compounds
from the soil and sediment. The process will convert inorganic
contaminants such as lead and copper to lower solubility hydroxides,
thereby reducing their mobility. TCLP will be run on the treated soil and
sediment prior to the return to its original location to determine if it
meets RCRA Toxicity Characteristic Rule. Soil and Sediments not
meeting the Toxicity Rule will be solidified. The contaminant rich waste
stream will be transported offsite for treatment.
Demolition of the roofs and walls of the three onsite buildings. The
debris will be crushed and transported to an offsite landfill. If the
remaining slabs are found to be contaminated they will be treated with
a solvent washing system to extract the PCBs.
P Removal of the debris and solid waste from the site, which will be
transported to an offsite landfill for disposal or treatment in accordance
with RCRA 40CFR 264, Subpart O and 40CFR 761, (a)(4) ....
P Installation of groundwater extraction wells in conjunction with a two
component treatment system to remove metals and organic contaminants.
Additional monitoring wells will be installed into the lower aquifer to
confirm its status. If it is found to be contaminated, the groundwater
51832.711/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 12 of 13
treatment system mentioned above will be expanded to address the
contamination of the lower aquifer.
The treated groundwater will be discharged to the Fayetteville Publicly
Owned Treatment Works (POTW), or the unnamed tributary to the
Cape Fear River.
Only the first three items are addressed in this Work Plan. Groundwater issues will
be addressed in a separate WA.
2.2.6 Post-RI/Pre-RD Investigation
A field investigation was conducted by BVWS during February 1993 as part of the
initial scoping for this work assignment in order. to augment the data previously
collected during the RI process. One shallow monitoring well, two shallow soil
borings, and one deep soil boring were drilled and samples were collected and
analyzed during the post-RI investigation. The soil and groundwater samples were
analyzed for volatile organics, acid base/neutral extractable organics, pesticides, PCBs,
and total metals. Total organic carbon analyses were performed on selected soils
samples. In addition, soil samples were collected for physical analyses including
permeability, moisture content, grain size distribution, and Atterburg Limits. The
results of this work effort indicate that surface and subsurface soils are contaminated
with PCBs and the groundwater in the shallow aquifer contains elevated levels of
PCBs and various metals. A low permeability clay layer was enco.untered both onsite
and offsite at a depth of approximately 15 to 20 feet below land surface. Indications
are this clay layer may be in excess of 105 feet thick and serves to retard if not
completely mitigate the downward migration of contaminants into any lower aquifers
in the area. Due to the thickness of this confining clay unit and the lack of water-
producing zones encountered within this unit, it was decided by EPA Region IV to
not complete any deep wells.
51832.711/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 2.0
Revision No.: 0
Date: February 17, 1994
Page 13 of 13
Upon completion of well development, rising and falling head slug tests were
performed to obtain estimates of the hydraulic conductivity of subsurface soils within
the screened intervals, The average hydraulic conductivity was estimated to be
approximately 1.25 x 104 centimeters per second in the sandy clay/clay region
between 14 and 24 feet below land surface.
51832.711/WP February 17, 1994
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Draft Work Plan Section 3.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 5
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
3.0 REMEDIATION GOALS AND DESIGN CONSIDERATIONS
3.1 REMEDIATION OBJECTIVES
In support of EPA Region IV, BVWS will perform services for the design of soils
excavation and remediation required at the Carolina Transformer Superfund site in
order to comply with EPA Work Assignment No. 18-4NC2, Revision No. 3 and the
Record of Decision Remedial Alternatives Selection document for the site executed
on August 29, 1991. The remedial design will provide for a technical specification-
based method for soil excavation and a performance specification-based system for
soil treatment.
3.2 SOILS/SEDIMENT EXCAVATION AND BUILDING DEMOLITION
Objectives for the excavation of soils and sediments at the site include the following:
n
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Demolition of roofs and walls of the three onsite buildings, and
subsequent crushing and transportation to an offsite landfill.
Treating the foundation slabs with a solvent washing system to extract
PCBs, if contamination is present.
Removal of the debris and solid waste from the site, and subsequent
transportation to an offsite landfill for disposal and/or treatment in
accordance with RCRA 40 CFR 264 Subpart O and 40 CFR 761 (a) ( 4).
Excavation of contaminated soils and sediments with PCB concentrations
exceeding 1 ppm, and stockpiling the soils onsite and on adjoining
property if necessary.
The remedial design efforts of this phase will focus on developing a set of technical
specifications for the building demolition and soil and sediment excavation. These
specifications will include the minimum requirements for the building demolition and
soil excavation activities.
51832.711/WP Februaiy 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
3.2. 1 Quality Assurance Plan
Section 3.0
Revision No.: 0
Date: February 17, 1994
Page 2 of 5
As part of the RD, BVWS personnel will prepare a site-specific Quality Assurance
Plan for excavation-related activities. The Quality Assurance Plan will focus on the
following issues:
Project organization and responsibilities
Data quality objectives
l::l Sampling procedures, particularly those pertaining to confirmation
sampling to delineate the boundaries of excavation
)::!
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Documentation and chain-of-custody procedures
Analytical procedures
Equipment calibration
Field and laboratory quality control
Preventive maintenance and corrective action
Training
3.2.2 Health and Safety Plan
As part of the RD, BVWS personnel will prepare a site-specific Health and Safety
Plan. This plan will provide guidance for personnel working onsite during excavation
activities to protect site workers, as well as the general public, from any physical or
chemical hazards at the site. The Health and Safety Plan will include the follmving:
l::l Site characteristics
l::l Planned site activities, number of people onsite, duration of activities
l::l Waste types and characteristics
l::l Hazard evaluation
l::l Training and medical monitoring requirements, and records for onsite
personnel
Organization of personnel, including identification of health and safety
personnel
l::l Emergency procedures and contacts
l::l Employee/visitor log and training log
51832.711/WP February 17, 1994
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Revision No.: 0
Date: February 17, 1994
Page 3 of 5
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
3_2_3 Easements
It is anticipated that easement purchases will be required to meet remediation goals.
Easements will likely be required for offsite contaminated areas, as well as for areas
used in stockpiling excavated soils. This process is anticipated to be time consuming
and will be initiated .by BVWS early in the design process.
3.2.4 Leachate and Infiltration Control of Stockpiled Soils
Excavated soils will remain stockpiled while samples are being analyzed. This
presents the need for leachate and infiltration control. It is anticipated that this
control will include placing excavated soils onto an impermeable liner within a
bermed area, and covering the stockpiles and/or installing a leachate collection
system.
3.3 SOILS/SEDIMENT TREATMENT
Objectives for the treatment of soils and sediments at the site include the following:
n Treat excavated soils/sediments with a solvent extraction process that is
capable of removing the organic contaminants. The extraction process
must also be capable of converting the inorganic contaminants (metals)
to lower solubility hydroxides in order to reduce their mobility.
Return treated soils and sediments to their original locations upon
satisfactory treated as determined by the Toxicity Characteristic Leaching
Procedure (TCLP) analysis. Soils and sediments not meeting the
requirements after TCLP analysis will be solidified and transported offsite
to a licensed facility for disposal as a hazardous waste.
The waste stream generated from the solvent extraction process will be
transported offsite for disposal as a hazardous waste at a licensed facility.
The remedial design efforts will focus on developing a performance type specification
for the soil and sediment washing process to be implemented in order to achieve the
51832. 71 !/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 3.0
Revision No.: 0
Date: February 17, 1994
Page 4 of 5
remediation objectives. The easements obtained prior to excavation activities should
be adequate for the treatment activities.
3.3.1 Quality Assurance Plan
Prior to soil/sediment treatment, BVWS personnel will prepare a site-specific Quality
Assurance Plan for treatment-related activities. The Quality Assurance Plan will
focus on the following issues:
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Project organization and responsibilities
Data quality objectives
Sampling procedures, particularly those pertaining to sampling to confirm
the effectiveness of treatment
Documentation and chain-of-custody procedures
Analytical procedures
Equipment calibration
Field and laboratory quality control
Preventive maintenance and corrective action
ll Training
3.3.2 Health and Safety Plan
Prior to treatment activities, BVWS personnel will prepare a site-specific Health and
Safety Plan. This plan will provide guidance for personnel working onsite during
soil/sediment treatment to protect site workers, as well as the general public, from
any physical or chemical hazards at the site. The Health and Safety Plan will include
the following:
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51832.711/WP
Site characteristics
Planned treatment activities, number of people onsite, duration of
activities
Waste types and characteristics
Hazard evaluation
Training and medical monitoring requirements, and records for onsite
personnel
February I 7, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 3.0
Revision No.: 0
Date: February 17, 1994
Page 5 of 5
Organization of personnel, including identification of health and safety
personnel
51832.711/WP
Emergency procedures and contacts
Employee/visitor log and training log
February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
4.0 SCOPE OF SERVICES
4.1 TASK 1 -PROJECT PLANNING
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 11
This task of the remedial design effort involves the preparation of this Work Plan
delineating the tasks necessary to comply with the Statement of Work (SOW)
contained in the EPA Work Assignment No. 18-4NC2, Revision No. 3 dated
December 20, 1993 and executed by BVWST on January 20, 1994. Subtasks deemed
necessary for the completion of this task include the following:
P Pre-design coordination meeting with EPA Region IV.
P Determination of performance standards for the soil treatment system,
and the debris and solids removal requirements.
Preparation of the RD Work Plan including:
Submittal of the Draft RD Work Plan.
EPA review of the Draft RD Work Plan.
Preparation of the Final RD Work Plan incorporating EPA
comments from the Draft submittal.
4.1.1 Pre-design Coordination Meetings
This subtask includes attendance at an initial scoping meeting prior to
commencement of pre-design activities. At the request of EPA, BVWS may be
required to attend additional meetings with EPA to clarify scope of work or provide
EPA with technical assistance. Meetings will be held with EPA Region IV personnel
for the purpose of coordinating the overall design approach for achieving the
remediation goals for the cleanup actions and to ensure proper communications
between EPA Region IV and BVWS. For costing purposes, BVWS assumes that
only one meeting at EPA Region IV Headquarters will be required and that three
BVWS personnel will attend. Costs for this subtask include local travel time and
preparation time. If additional meetings are required by the EPA RPM, the WA will
be amended to reflect additional LOE and costs for meeting attendance.
51832. 711/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs JV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
4.1.2 Performance Standards Determination
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 2 of 11
This subtask will involve the preparation of the cleanup standards necessary to
achieve the criteria presented in the Record-Of-Decision document for the protection
of human health and the environment. Preliminary cleanup standards have previously
been formulated, and are presented in Table 4-1, along with maximum detected
concentrations in soil and sediment. These cleanup standards will be reviewed and
revised if needed to comply with current local, State, and Federal rules and
regulations. The cleanup standards will become the basis of the design criteria.
Their subsequent evaluation will include:
ri Review of applicable local, State, and regional building codes;
ri Assure compliance with CERCLA procedures and other environmental
laws;
ri Final ARARs review; and
ri Review of available data.
4.1.3 Prepare Draft and Final Work Plan
BVWS has developed this Remedial Design Work Plan to provide EPA with the
scope of work, schedule, and budget for tasks required under this WA completion.
This RD Work Plan also presents the estimated Level-of-Effort (LOE) and
associated costs including travel and expenses that will be required to complete this
WA. Estimated LOE per subtask and estimated costs are presented in Section 6.0.
This Work Plan may be amended when additional site conditions develop or as
necessary to accommodate additional EPA objectives.
This Work Plan consists of a two-volume submittal with Volume 1 containing all
technical information and associated assumptions and Volume 2 consisting of the cost
elements associated with the efforts. Volume 1 consists of descriptions of the plans
and specifications, the schedule for remedial design activities, and narratives detailing
the components of the technical issues required to ensure compliance with the ROD
for the site. Volume 2 consists of the cost data including the LOE estimates for
completion of the tasks and subtasks, all associated labor costs, other direct costs
(OD Cs) estimated for the efforts, projected subcontracting costs, and supporting
information.
51832.711/WP February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
TABLE 4-1
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 3 of 11
PRELIMINARY REMEDIATION GOALS FOR SOIL AND SEDIMENT
COMPOUND MAXIMUM REMEDIATION MAXIMUM REMEDIATION
CONCENTRATION GOAL CONCENTRATION GOAL
mg/kg ppm mg/kg ppm
Aluminum 9.90 27.0
Arsenic 5.0 5.0
Barium 0.061 100.0 0.140 100.0
Beryllium 2.2 X 10-4 5.1 X 10"4
Cadmium 0.0022 1.0 4.7 X 10"' 1.0
Calcium 0.560 1.70
Chromium 0.010 5.0 0.029 5.0
Cobalt 9.4 X 10-4 0.0051
Copper 0.0028 0.590
Lead 0.170 5.0 0.150 5.0
Magnesium 1.00 1.70
Manganese 0.250 0.095
Mercury 6.9 X 10"4 0.2 6.0 X 10"5 0.2
Nickel 0.0035 0.0093
Potassium 0.330
Selenium 0.0024 1.0 1.0
Silver 5.0 5.0
Strontium 0.012
Titanium 0.200
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Carolina Transformer Site -Remedial Design
ARCs JV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
COMPOUND
Vanadium
Zinc
2,4,5-
Trichlorophenol
2,4,6-
Trichlorophenol
2-Nitroanaline
3-Nitroanaline
4-Nitroanaline
2,4-Dinitrophenol
4-Nitrophenol
3-Methyl-4,6-
dinitrophenol
Phenanthrene
Ethylbenzene
Xylenes
Chlordane
Chloroform
o-Cresol
m-Cresol
p-Cresol
Cresol (total)
2,4-D
51832.711/WP
MAXIMUM
CONCENTRATION
mg/kg
0.0089
0.100
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
4.0 X 10'6
6.0 X 10-6
REMEDIATION
GOAL
ppm
400.0
2.0
0.03
6.0
200.0
200.0
200.0
200.0
10.0
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 4 of 11
MAXIMUM
CONCENTRATION
mg/kg
REMEDIATION
GOAL
ppm
0.051
0.260
400.0
2.0
0.03
6.0
200.0
200.0
200.0
200.0
10.0
February 17, 1994
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Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
.
COMPOUND MAXIMUM
CONCENTRATION
mg/kg
Dieldrin 4.6 X 10-6
4,4'-DDE 5.7 X 10-6
1,2-Dichloroethane --
2,4-Dinitrotoluene --
1,1-Dichloroethene --
Carbon --
Tetrachloride
Endrin --
Heptachlor --
Hexachlorobenzene --
Hexachlorobutadiene --
Hexachloroethane · --
Lindane --
Methoxychlor --
Nitro benzene --
Pentachlorophcnol --
Pyridine --
Trichloroethene --
Trichloroethane 0.0020
Tetrachloroethene --
Methyl ethyl ketone --
Toluene --
51832.711/WP
REMEDIATION
GOAL
ppm
--
--
0.5
0.13
0.7
0.5
0.02
0.008
0.13
0.5
3.0
0.4
10.0
2.0
100.0
5.0
0.5
--
0.7
200.0
--
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 5 of 11
MAXIMUM REMEDIATION
CONCENTRATION GOAL
mg/kg ppm
----
----
--0.5
--0.13
--0.7
--0.5
--0.02
--0.008
--0.13
--0.5
--3.0
--0.4
--10.0
--2.0
--100.0
-5.0
--0.5
----
--0.7
--200.0
1.20 --
February I 7, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
COMPOUND MAXIMUM
CONCENTRATION
mg/kg
Toxaphene
Silvex
Vinyl Chloride
Carbon disulfide
Benzene
Chlorobenzene
1,2-Dichlorobenzene --
1,3-Dichlorobenzene
1,4-Dichlorobenzene
1,2,4-
Trichlorobenzene
PCBs 2,100
Dioxins/fur ans 0.750
REMEDIATION
GOAL
ppm
0.5
1.0
0.2
0.5
100.0
7.5
1
1.2 X 10'4
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 6 of 11
MAXIMUM REMEDIATION
CONCENTRATION GOAL
mg/kg ppm
0.5
1.0
0.2
0.028 0.5
0.064 100.0
0.050
0.170
0.590 7.5
4,400 1
0.220 1.2 X 10""
Note: Remediation goals are TCLP maximum concentrations, as listed in 40 CFR Part 261.24, with the exception of those
for PCBs and Dioxins/furans. The PCB remediation goal is 1 ppm, as set by EPA. The Dioxin/furan remediation goal
is 1.2 x 10-4 ppm, as determined from the Baseline Risk Assessment for Carolina Transformer (March 7, 1991).
4. 1.4 Deliverables
Ten (10) copies of the draft Work Plan will be submitted to EPA Region IV for
review. Eight (8) copies of the draft submittal shall be bound, while the remaining
two (2) shall be unbound and copied on paper without holes. The enclosed schedule
illustrates that twenty-one (21) days have been allotted for the EPA Region IV
review of the Draft Work Plan.
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site • Remedial Design
ARCs IV• EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 7 of 11
Upon completion of the EPA Region IV review of the draft Work Plan, the final
Work Plan will be prepared, incorporating all review comments into the final
submittal. Six ( 6) copies of this final Work Plan will be submitted to EPA Region IV.
Two (2) of these copies shall be unbound and copied on paper without holes.
4.2 TASK 2 -DESIGN PREPARATION & SOLICITATION FOR SOIL
EXCAVATION & BUILDING DEMOLITION
A technical-based soil excavation and building demolition design and solicitation
package will be prepared for the source remediation. In compliance with the
discussion at the January 31, 1994 meeting with EPA, separate submittals will be
made for the excavation/demolition design, and .the performance-based treatment
design. Task 2 will include the preparation of the following items:
l:l Preliminary Design and Presentation;
l:l Draft (95%) Design and Submittal;
l:l Final Design and Bid package Submittal;
4.2. 1 Preliminary Design and Presentation
This subtask will encompass the initial strategy and approach for the design of
building demolition and soil excavation. Rough pre-draft plans and specifications will
be developed to determine if the overall work approach is acceptable and efficiently
meets EPA requirements. Initial scoping of requirements for logistics, easements and
permitting, special site requirements, cost estimate work breakdown structure,
QNQC program requirements, conceptual construction schedule, and health and
safety issues will be developed.
Upon completion of approximately 30 percent of the building demolition and soil
excavation design, a presentation will be made to EPA Region IV and NCDEM
personnel to demonstrate BVWS's design approach and to inform EPA of any
identified problem areas which have or are anticipated to develop. The presentation
shall include the following:
• Rationale that will be used to determine the areas which require
excavation;
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 8 of 11
• Preliminary estimates for soil excavation and debris quantities;
•
•
•
•
•
•
•
Control strategy to determine limits of remediation;
Identification of logistics required to ensure minimum interference with
future remedial action;
Anticipated easement and permitting requirements;
Site access and facility layout;
Proposed construction schedules;
Anticipated health and safety requirements; and
Proposed work break down structure for construction cost estimates .
This meeting will be used to streamline the review schedule and if necessary, to
realign BVWS's design approach to more closely satisfy EPA expectations and
objectives. For costing purposes, it is assumed that the meeting will be held at EPA
Region IV headquarters in Atlanta and that three BVWS personnel will attend.
Costs for this subtask include local travel time, and meeting preparation time. If
additional meetings are required by the EPA RPM, the WA will be amended to
reflect additional LOE and costs for meeting attendance.
4_2-2 Draft (95%) Design Submittal
BVWS will submit the draft design report to EPA on or before the submittal date
established in Section 6 of this Work Plan. The submittal shall include, but not be
limited to: design drawings; demolition and excavation specifications; construction
sequence and schedule; site access and facility layout; health and safety requirements;
cost estimate; easement and permitting requirements; and solicitation package for
perspective bidders.
BVWS anticipates that approximately ten (10) design drawings will be necessary for
this design. Ten (10) copies of the draft Design Report with drawings will be
submitted to EPA Region IV for review. Eight (8) copies of the draft submittal shall
be bound, while the remaining two (2) copies shall be unbound and copied on paper
without holes. The enclosed schedule illustrates that thirty (30) days have been
allotted for the EPA Region IV review of the Draft Design Report.
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site • Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
4.2.3 Final Design and Bid Package
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 9 of 11
Upon completion of the EPA Region IV review of the draft design submittal, the
final design will be prepared, incorporating review comments into the final submittal.
Six (6) copies of this final design will be submitted to EPA Region IV. Two (2) of
these copies shall be unbound and copied on pages without holes. The drawings and
specifications will be reproducible and ready for bid advertisement.
The solicitation package will include requirements for documenting equipment start-
up, operator training, and QNQC requirements.
4.3 TASK 3 -DESIGN PREPARATION AND SOLICITATION FOR
SOIL TREATMENT SYSTEM
A performance based remedial design and solicitation package for the soil treatment
system shall be prepared by BVWS. EPA may provide BVWS with information
regarding previous proven designs which have been determined to be successful in
accomplishing similar remedial goals at other CERCLA sites. BVWS will utilize this
information as a basis for approach on this performance based design. However,
BVWS will also examine various new and innovative methods and strategies to
attempt to provide the most cost effective and efficient soil treatment system
available. This task will include the preparation of the following items:
l:!
l:!
Subtask 3.1
Subtask 3.2
Draft Performance Specifications & Bid Package; and
Final Performance Specifications & Bid Package.
4.3. 1 Draft Performance Specifications & Bid Package
BVWS will submit the Draft Performance Specifications Report to EPA on or before
the submittal date established in Section 6 of this Work Plan. The submittal shall
include, but not be limited to: conceptual process layout, remedial goals,
contingencies to account for failure to achieve remedial goals, schedule, site access
and facility layout, health and safety requirements, cost estimates, and easement and
permitting requirements. Ten (10) copies of the Draft Performance Specifications
Report with drawings will be submitted to EPA Region IV for review. Eight (8)
copies of the draft submittal shall be bound, while the remaining two (2) copies shall
51832.711/WP February I 7, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 10 of 11
be unbound and copied on paper without holes. The enclosed schedule illustrates
that thirty (30) days have been allotted for the EPA Region IV review of the Draft
Performance Design Report.
4.3.2 Final Performance Specifications & Bid Package
Upon completion of the EPA Region IV review of the draft, the final performance
design and solicitation package will be prepared, incorporating review comments into
the final submittal. Six (6) copies of the final performance design will be submitted
to EPA Region IV. Two (2) of these copies shall be unbound and copied on pages
without holes. The drawings and specifications will be reproducible and ready for bid
advertisement.
The solicitation package will include requirements for documenting equipment start-
up, operator training and QNQC requirements.
4.4 TASK 4 -TECHNICAL SUPPORT
Technical support will be provided throughout the design process to promote positive
community relations.
4.4.1 Community Relations & Support
This subtask shall include BVWS participation in any public meeting or forum on
behalf of or with EPA Region IV. For costing purposes, it is assumed that one (1)
BVWS employee will attend two (2) one-day meetings in Fayetteville, NC. Each
meeting is assumed to involve a single nights stay with associated air fare and related
travel costs. Technical support shall be provided on an as-needed basis. For the
purpose of this cost estimate, a fixed LOE has been assumed. This LOE may be
amended at any time by EPA.
4.5 TASK 5 -WORK ASSIGNMENT MANAGEMENT
Work Assignment management and project closeout shall be performed m
accordance with the ARCS contract-required protocols.
51832.711/WP February 17, 1994
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Draft Work Plan Section 4.0
Revision No.: 0
Date: February 17, 1994
Page 11 of 11
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
4_5_ 1 Project Management
This subtask encompasses day to day project and WA management activities which
are not included under other specified tasks or subtasks in this Work Plan. Each
subtask has been assigned a certain amount of LOE and costs for project
management. These LOE and costs have been summed and totaled under this
subtask. Activities under this subtask will include but not be limited to: weekly
meetings and/or tele-conferences with the EPA RPM to keep EPA informed of
project status and progress; periodic reporting to EPA in the form of letters or
memos to the EPA RPM; BVWS accounting and billing procedures; BVWS project
scheduling and budgeting; and resource allocation.
4.5.2 WA Closeout
The WA closeout portion of this effort will consist, at a minimum, of the following
items:
)::l
)::l
)::l
)::l
)::l
)::l
)::l
)::l
51832.711/WP
Closeout of outstanding subcontracts and completion of subcontractor
evaluations;
Closeout of purchase order accounts;
Inventory, identification, and turnover of property acquired during the
course of the project;
Review and reconciliation of work assignment account status;
Review and reconciliation of work plan and work plan approval status;
Technology transfer database update;
Completion of Work Assignment Completion Report (WACP);
Invoicing for award fee; and
Submittal of final invoice.
February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 5.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 1
5.0 SCHEDULE AND DELIVERABLES
The projected Remedial Design schedule of milestones for the Carolina Transformer
Site is presented in Table 5-1. This projected schedule presents dates for each
project deliverable required by the Work Assignment, as well as project milestones.
For the majority of deliverables, a draft will be submitted to EPA Region IV for
review comments. Final reports will then be submitted following the receipt of the
Agency's written review comments as stipulated in the Work Assignment.
Assumptions include the time required for EPA review of deliverables.
Table 5-1
Schedule of Milestones
Carolina Transformer RD
I MILESTONE I DATE I
DRAFT WORK PLAN SUBMITTAL 2/18/94
RECEIVE DRAFT WORK PLAN COMMENTS 3/18/94
FlNAL WORK PLAN SUBMITTAL 3/25/94
WORK PLAN APPROVAL 4/1/94
PRELIMINARY DESIGN PRESENTATION 5/6/94
SUBMIT DRAFT DESIGN AND SOLICITATION PACKAGE 6/10/94
RECEIVE DRAFT DESIGN COMMENTS 7/8/94
SUBMIT FlNAL DESIGN AND SOLICITATION PACKAGE 7/'}2/94
NOTE: Schedule for submittal and review of the performance-based design and solicitation package
for soil treatment to be negotiated.
51832.710/WP February 18, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
6.0 ESTIMATE OF COSTS
Section 6.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 1
The estimated level of effort (LOE) and costs associated with the Remedial Design
are included in Volume II of this Work Plan.
51832.711/WP February 17, 1994
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
7.0 REFERENCES
Section 7.0
Revision No.: 0
Date: February 17, 1994
Page 1 of 2
1. Final Expanded Site Investigation Repon, Stauffer Chemical Company, Tarpon
Springs, Pinellas County, Florida. Prepared by NUS Corporation for the U.S.
Environmental Protection Agency, September 16, 1988.
2. Interim Final Listing Site Inspection Report, Stauffer Chemical Company Site,
Tarpon Springs, Pinellas County, Florida. Prepared by NUS Corporation for
the U.S. Environmental Protection Agency, March 11, 1991.
3. Risk Assessment Guidance for Superfund, Volume I -Human Health, U.S.
Environmental Protection Agency, December 29, 1989.
4. Risk Assessment Guidance for Superfund, Volume II-Environmental Manual,
U.S. Environmental Protection Agency, March, 1989.
5. Health Effects Assessment Summary Tables, U.S. Environmental Protection
Agency, Annual, FY-1991.
6. B& V Waste Science and Technology Field Logbook for Site Visit, Stauffer
Chemical (Tarpon Springs) site, November 6, 1992.
7. Ralph C. Heath and Peter C. Smith, Groundwater Resources of Pinellas County,
Florida. Florida Geological Survey Report of Investigations N2 12, 1954.
8. B.S. McClellan, Senior Hydrogeologist, Stauffer Chemical Company, Jetter to
unknown recipient, April 17, 1985. Subject: Discussion summarizing initial
Site Assessment Groundwater Monitoring Plan at Stauffer Chemical Company.
9. Hydrogeologic Assessment -Stauffer Chemical Company, Tarpon Springs Plant,
Tarpon Springs, Florida. Prepared for Stauffer Chemical Company by Seaburn
and Robertson, 1987.
10. Survey-Review Repon on the Anclote River, Florida. Jacksonville District Corps
of Engineers, Serial N2 36, 1973.
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Draft Work Plan
Carolina Transformer Site -Remedial Design
ARCs IV -EPA Contract No. 68-W9-0055
Work Assignment No. 18-4NC2; Rev. No. 3
Section 7.0
Revision No.: 0
Date: February 17, 1994
Page 2 of 2
11. The SurficialAquifer in Pinellas County, Florida, U.S. Geological Survey, Water
Resources Investigations Report 84-4289, 1984.
12. Southwest Florida Water Management District Computer Printout of I Consumptive Water Use Permits, April 21, 1987.
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13. U.S. Geological Survey 7.5 Minute Series Topographic Quadrangle Maps of
Florida: Elfers-1974, Tarpon Springs-1973, Scale 1:24,000.
14. U.S. Fish and Wildlife Service, Gulf Coast Ecological Inventory Map for Tarpon
Springs, Florida, Map Series 28082-Al-EI-250.
15. Water Quality Studies of the Anclote and Braden Rivers, prepared by the
Tampa Bay Regional Planning Council, 1986.
16. Determining Soil Response Action Levels Based on Potential Contaminant
Migration to Groundwater: A Compendium of Examples, U.S. Environmental
Protection Agency Publication N2 540/2-89-057, Washington, D.C.: October
1989.
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DRAFT
REMEDIAL DESIGN WORK PLAN
Volume 2
Carolina Transformer
Fayetteville, North Carolina
Prepared for
U.S. ENVIRONMENTAL PROTECTION AGENCY
Region IV
EPA Work Assignment N2 18-4NC2
Prepared by
BLACK & VEATCH WASTE SCIENCE, INC.
Atlanta, Georgia
February 17, 1994
--- - - -W.A NO. 18-4NC2
SITE NAME CAROLINA TRANSFORMER AD
COST ESTIMATE
FISCAL YEAR 1993
PROJECT NO.
PHASE NAME
BVWST PHASE NO.
P4
P3
P2
P1
12
T1
C
TOTAL LABOR
LABOR+ OH
OTHER DIRECT COSTS
POSTAGE
TELEPHONE
TRAVEL
EQUIPMENT
MISC
COMPUTER
REPRODUCTION
SUBCONTRACTORS
TOTAL CDC'S
PHASE TOTALS
PHASE TOTAL BASE FE
PHASE FULL FEE
I TOT.AL ESTIMATED COST
TOTAi... ODC
POSTAGE
TELEPHONE
TRAVEL
EQUIPMENT
MISC
COMPUTER
REPRO
SUBS
TOTAL
51832
PROJECT PLANNING
100
Hours Cost
35.73 8 286
26.67 52 1367
20.87 56 1169
18. 11 24 435
18.49 0
13.41 0
11.87 24 285
164 3561
8290
328
486
11750
86293 I
200
180
2380
3520
200
5520
730
0
12730
-- - - -- -
AD -Excavatioo/Domolition RD -Excavation/Demolition
Prelimirarv 1'30%) Desinn Draft 195%) Desian
200 210
Hours Cost Hours Cost
32 1143 40 1429
40 1067 64 1707
80 1670 160 3339
24 435 24 435
60 1109 160 2958
0 0 0
12 142 60 712
248 5566 508 10581
12958 24631
445 887
819 1555
16094 31995
TOTAi... HOURS
PROFESSIONAL HRS
CLERICAL HAS
TOTM.
RD -Excavation/Demolitio
Firal Design
220
Hours Cost
8
16
24
24
32
0
32
136
:/:;:;:,:;:::::-: :":':-:~::,~:::,::'
P4
P3
P2
P1
12
T1
Total
0 ·,.;.(:~:,:,:.:.::-::···--··
286
427
501
435
592
0
380
2620
6098
320
544
30
894
210 .
361
7583
104
212
380
184
352
0
1212
172
1384
--
Hours Cost
0
0
0
0
0
0
0
0 0
0
0
0
0
- - -
SOIL TREATMENT
PERFORMANCE DESIGN
300
Hours
16
40
40
88
100
44
328
RAW SALARY
P4
P3
P2
P1
12
T1
0
TOTM..
Cost
572
1067
835
1594
1849
0
522
6438
14988
1000
1296
100
2396
522
985
18891
3216
4161
2838
2028
1109
0
1187
14539
-
---- - -
W.A NO. 18-4NC2
SITE NAME: CAROLINA TRANSFORMER
COST ESTIMATE
FISCAL YEAR 1993
PROJECT NO. 51832
PHASE NAME
BVWST PHASE NO.
P4
P3
P2
P1
T2
T1
0
TOTAL LABOR
LABOR+ OH
OTHER DIRECT COSTS
POSTAGE
TELEPHONE
TRAVEL
EQUIPMENT
MISC
COMPUTER
REPRODUCTION
SUBCONTRACTORS
TOTALOOC'S
PHASE TOTALS
PHASE TOTAL BASE FE
PHASE TOTAL AWARD FE
PHASE FULL FEE
l TOTAL ESTIMATED COST
TOTAL OOC
POSTAGE
TELEPHONE
TRAVEL
EQUIPMENT
MISC
COMPUTER
REPRO
SUBS
TOTAL
TECHNICAL SUPPORT
400
Hours Cost
35.73 32
26.67 40
20.87 0
18.11 •ID
18.49 0
13.41 0
11.87 16
128 :·-.-.-.-.-·,:::-:;--•·
0
0
1240
0
0
992
I 160
300
2692
1143
1067
0
724
0
0
190
3124
7274
1240
0
512
30
1782
272
389
9716
16374 I
---- --
PROJECT MANAGEMENT PROJECT CLOSEOUT
500
Hours
18
16
0
20
0
0
24
78
Cost
643
427
0
362
0
0
285
1717
3997
456
30
486
TOTAi HOURS
501
Hours
0
8
0
4
0
0
24
'"
PROFESSIONAL /-IRS
CLERICAL HRS
TOTAL
Cost
0
213
0
72
0
0
285
571
1329
24
100 .
Hours
300 ':":'··'=··-:·:·:-:=·=······
424
51
49
1853
P4
P3
P2
P1
T2
T1
Total
0
-- -- - - -
Cost Hours Cost Hours Cost
=
=
HAW SALARY
50 P4 1787
64 P3 1494
0 P2 0
64 P1 1087
0 T2 0
0 T1 0
178 0 475
64 TOTAL 4841
242