NCD980602163_19781026_Warren County PCB Landfill_SERB C_Contaminated Soil PCB Mixture Site Ranking-OCR

,MM£a a. HUNT • .Ill. --STATE OF NORTH CAROLINA
DEPARTMENT OF HUMAN RESOURCES
Division of Health Services
JAC09 kOOMEN, M .0., M .P.H.
DIIUlCTOII
· SAIIAH T. WORl'l'OW, M.D.. M.P.H.
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Ncal:Turt P. 0. Box 2091 Rale~h 27602
October 26, 1978
MEMORANDUM
TO: Mr. David E. Kelly
Crime Control and Public Safety
N. c. Department of Natural Resources
and Community Development
Archdale Building
TiiROUGH: Jacob Koomen, N.D., M.P.H.
FROM:
Director, Division of Health Services
Marshall Staton, Chief
Sanitary Engineering Section
SUBJECT: Contaminated Soil PCB Mixture Site Ranking
Please find atta.ched a copy of site specifications for contaminated soil PCB
mixtures as interpreted from the federal rules and regulations and as recommended
by the state solid and hazardous waste programs for locating a chemically secure
area. Also attached are two site rankings as prepared by EPA an.d our office.
Desirable features of the recommended sites are .included and reasons for not
recommending alternate sites for consideration at this time are given.
The recommended two-site combination is Chatham and Warren as a first choice
with Chatham and Nash being the second choice.
Please note that our recorrmendations do not include an artificial liner for this
particular problem and recognition is given to the fact that a SO-foot separatj9~-
between the groundwater ·and the disposal site bottom is not prac tica 1. Howeve~ __ . ~
our state recommendations do include a holding pond for use during construction
and provisions for gas and vapor monitoring and release at the site.
If further information is needed, do not hesitate to contact this office.
Attachments
PLAINTIFF'S
EXHIBIT
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FEDERAL EPA SITE SPECIFICATIONS FOR THE DISPOSAL OF PCB MIXTIJRES AS CONTAINED
IN FEDERAL REGISTER, VOLUME 43, NUMBER 34, DATED FEBRUARY 17, 1978
-7 Three foot compacted soil liner with permeability of lxlO cm/sec, greater than
30 percent passing Number 200 sieve, Liquid Limit greater than 30, and Plasticity
Index greater than 15. In addition to the above, an artificial liner of 30 mill
thickness is required.
Fifty foot separation between waste and the nearest groundwater. {Discussions
with EPA personnel in interpreting the requirements for separation between waste
and groundwater and recognizing general soil and water table conditions prevalent
in the contaminated counties has resulted in the following specifications to achieve
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the intent of the SO-foot separation requirement. At a minimum, five feet of
( naturally thick and relatively impermeable materials plus three feet of impermeable
lxl0 -7cm/sec soils plus a 30 mill artificial liner covered by two feet of permeable
material for liner protection and to allow leachate movement if generated and also,
to accommodate the leachate collection system would be required to separate waste
from natural groundwater conditions. Waste site would have to be covered with an
artificial liner in addition to a two-foot cover of impermeable soils.)
Site elevation for protective dyking above 100-year floodwater elevation.
Low to moderate relief in topography.
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.Monitoring system consisting of three monitor wells and monitoring of both
groundwater and surface water sources in and around the disposal site.
Laboratory analysis to consist of background and continuous monitoring for
PCB's, Ph, specific conductivity and chlorinated organics.
Provisions for leachate collection.
Operational plans subject to Regional Administrator approval.
Fencing and other security precautions, including signing.
Adequately constructed and maintained access roads.
Approval of design and operational plans including detailed reports of the waste
material proposed for disposal, site plans and design drawings, technical data
on soils and water table to demonstrate reql.irements of containment can be met,.
sampling and monitoring techniques to be utilized, expected waste volumes of
PCB' s, other state, local, and federal permits or approvals and time schcdu les
for complying with the PCB disposal regulations.
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RECOMMENDED SITE SPECIFICATIONS FOR A PREPARED SITE TO RECEIVE A MIXTURE OF
SOILS CONTAINING PCB'S AND OTHER CONTAMINANT CARRIER MATERIALS, GRASS, ACTIVATED
CHARCOAL, ASPHALT, AND OTHER INCIDENTAL RESIDUE PARTICLES FOUND ON HIGHWAY
SHOULDERS WITHIN THE 14-COUNTY CONTAMINATED ZONE
-7 A soil liner consisting of three feet of compacted soil meeting the lxlO cm/sec
pet::meability requirements and other federally recomnended limits for Liquid Limits
and Plasticity Index.
A minimum of ten feet of separation between the static water tabl~ and the
. deposited waste, including placed impermeable and permeable soil liners. (The
recommended section then would have five feet of naturally thick relatively
impermeable material plus three feet of compacted impermeable soil liner plus
two feet of permeable soil material to accommodate a leachate collection system
and to provide sufficient cushion to protect the leachate collection system during
filling of the site. Final cover would consist of a 10 mill artificial liner
cover in addition to two feet of impermeable soil.)
Site located above 100-year floodwater elevation.
Low to moderate relief in topography.
A monitoring system consisting of at least three monitor wells and sampling
stations established on existing surface water sources.
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Lab analysis to include PCB's, Ph, specific conductants (when ~quipment is
available), other chlorinated organics, and analysis required for routine drink in(~)
water sampling.
Security measures to include fencing and signing at a minimum.
Adequate access road to be constructed and maintained.
Concurrence from other state agencies having statutory responsibilities

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maintain environmental
quality.
De~ign and operational plans to include topo before and after drawings. A repc
specifying operational and development movements and other detailed reports
including requirements
for site monitorin& leachate system construction,
line·
construction,
expected waste volumes, holding pond specifications,
erosion cc
techniques, and description of the apparatus to be used for gas and vapor mo
and rele.ase.
Plans should show sufficient: buffer to allow for future monitoring, holdfr
construction,
and surface water control.
RANKrnG OF SITE SELECTED FOR POSSIBLE DISPOSAL OF PCB MIXTURE
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The below ranking was based entirely on soil and water table technical criteria.
PRIORITY RANKING SITE NUMBER AND LOCATION
1 #5 Person County
2 #4 Warren County
3 #7 Nash County
4 #1 Wake County
5 #10 Chatham County
6 #6 Granville County ,..
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RANKlliG OF PROPOSED PCB DISPOSAL SITES MADE BY EPA REPRESENTATIVES
PRIORITY RANKlliG
1-
2
3
4
5
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·SITE LOCATION
Granville County-k
Nash County
Person County 1rlr
Chatham County
Warren County
Wake County
* Available soil data was interpreted to mean tight soil rather
than rock as indicated by auger refusal. Also, more data on
groundwater elevations was desired.
** Some reservation on location expressed.
Overall technical evaluation was that any of the six sites could be used with
proper design.
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SITES NOT CONSIDERED IN TWO-SITE COMBINATION BECAUSE OF LOW PRIORITY
Wake (NCSU)
Person (O'Briant)
Granville (Pruitt)
Ranked last on a comparative basis due to its
close proximity to populated areas.
This site ranked second from last due to lack
of isolation features and it~ location is not
compatible with the greatest waste volumes.
Ranked third from last due to lack of non-dedicated
right-of-way on adjacent properties which must be
crossed.
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RECOMMENDED TWO-SITE COMBrnATIONS AND SITE CHARAC°TERISTICS SHOWWG DESIRABLE
FF.A TIJRES FOR POSSIBLE USE
Warren (Pope Property)
_Desirable Features:
1. -7 Site has sufficient volume of lxlO cm/sec soil for constructing a three
foot compacted soil liner. The soil clay content exceeds the minimum
requirements a~ specified in federal regulations.
2. Sufficient soil is available on site to meet t.he two-foot penneable
medium requirement to accommodate leachate collection devices. This
soil is available without alteration or additives.
3. Up to 25 feet of depth available for PCB soil mixture waste. (May be
desirable to decrease working depth to accommodate delivery trucks entry
and exit.
4. Natural surface gradient is approximately 4 percent.
5. Sufficient acreage can be identified for locating the disposal site,
spoil storage areas, surface water control requirements and a holding
pond.
6. Very little clearing required. (Site is currently used for production of
soybeans.)
7. Excess stockpile soil could be blended into final landscape design.
8. Has good isolation features.
9. Does not flow directly into water supply A II Stream.
10. Is ranked second of those counties having contaminated roadside shoulders.
Requirements Before Use:
In addition to meeting detailed siting requirements, the following actions
would have to be initiated or completed prior to acceptance of wastes.
1. Obtain concurrence of local officials.
2. Purchase property.
3. Construct approximately .5 mile of access road.
4. Prepare site in accordance with approved plans.
5. Record site description documents with local register of deeds.
Chatham (Chatham County Sanitary Landfill Site)
Desirable Features:
1. Has sufficient soil for three-foot compacted soil liner which will exceed
clay silt requirements of the federal .regulations.
2. Has on-site soil which could be used for two~foot leachate medium after
alteration and mixing of an equivalent six inches of sandy material
covering the disposal area.
3. Up to 20 feet of depth available for PCB soil mixture disposal.
4. Natural surface gradient is moderate.
5. Has sufficient room for locating the disposal area, stockpiling soil
material, installing monitor wells,
and constructing a holding pond.
developing surface water control
6. Light clearing needed before construction.
7. Terrain is such that trucks could enter the lower portion of the site ....
for delivery of wastes.
8. Excess soil material could be used for landfill purposes.
9. Has isolation feature and is already established as a solid waste
management facility.
10. Does not fe·ed directly into water supply A 11 Stream.
11. Has more contaminated shoulder miles than any of the other affected
counties.
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Requirements Before Use:
1. Obtain concurrence of local officials.
2. Compensate Chatham County for property use by obtaining additional
adjacent property. (This is an absolute requirement if more than half
of the waste material is designated for this site.)
3. Construct approximately 2,000 feet of access road to the receiving area.
4. Prepare the site in accordance with approved state requirements.
S. Rec.ord site description of any newly acquired and affected property
with the local register of deeds office.
Nash (Baker Property)
Desirable Features:
This site should only be able to accommodate half of the PCB contaminated
soil mixture due to the constraints in engineering the site for truck exit
and entry, site disposal, locating monitor wells, sub-surface water control,
and a holding pond.
1. . -7 Sufficient volume of the lxl0 cm/sec soil is available for constructing
a three-foot compacted soil liner. A clay silt content exceeds require-
ments as specified in the federal regulations.
2. Soil for creating a two-foot leachate medium is available; however, it
would require alteration with an equivalent six inches of sand over the
disposal area bottom mixed in with soils available on-site.
3. Up to 16 feet of depth is available for soil contaminated with PCB waste
material.
4. Disposal site would be located on a relatively flat platenu; however, the
overall site would require more detailed engineering in locating exit and
entry.points for delivery trucks, the holding pond, and other site require-
ments.
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5. The site does have sufficient acreage for locating surface runoff devices,
·stockpile areas, the holding pond, the disposal area, and monitoring weJ )
6. Although not an undesirable feature, excess soil material would have to
be transported further from the point of excavation than would be required
at the other sites being considered.
7. Has desired isolation features.
8. Does not discharge directly into a water supply A II Stream.
9. Ranks third in ranking of counties for contaminated roadside shoulder
material.
Requirements Before Use:
1. Obtain concurrence of local officials.
2. Purchase property.
3. Construct approximately .4 mile of access road.
4. Prepare site in accordance with state requirements. (Preparation includes
medium to heavy clearing of trees and vegetation.)
5. Record site description documents with local register of deeds office.