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Home My WebLink AboutNCD980602163_19830803_Warren County PCB Landfill_SERB C_Crime Control & Public Safety Final Report-OCRNorth Carolina Department of Crime Control .I~ & Public Safety 512 N. Salisbu ry Street P. 0. Box 27687 Raleigh 27611-7687 (919) 733-2126 James B. Hunt, Jr., Governor Mr. Al Hanke Environmental Scientist EPA, Region IV 345 Courtland St., NE Atlanta, Georgia 30365 Dear Al: August 3, 1983 Heman R. Clark, Secretary Enclosed is a copy of a corrected Final Report prepared by Sverdrup and Parcel Consulting Engineers. This replaces the one sent to you on July 20, 1983. WWP,Jr:am cc: Jack Reavis J g_e_.Lennon ..(f; W. Strickland M. C. Adams R. F. Helms :}tJZ u}h. I I, ;f . dfi'f1am iv. Philll;s~; Assistant to the Secretary I I I I I I I I J I I / NORTH CAROLINA DEPARTMENT OF CRIME CONTROL AND PUBLIC SAFETY . FINAL REPORT PCB WASTE DISPOSAL SITE WARREN COUNTY, NC I'l'EM 1111-1990 CODE 14900 JULY, 1983 Prepared by Sverdrup & Parcel 2211 W. Meadowview Road Suite 114 Greensboro, NC 27407 , I I ·1 . ., I I l I I 1 I I GENERAL DESC RIPTION FINAL REPORT PCB WASTE DISPOSAL SITE WARREN COUNTY The PCB Was t e Dis posal Site is a hazardous waste landfill, containing appr oximat ely 40 ,000 cubic yards of polychlorinated biphenyl (PCB) c ont aminated s oil, located in Wa rren County , North Carolina. PERTINENT DATED Contractor 's bids for the construction of the site were opened on January 21, 1982, and the contract was awarded to Jim Linebe rger's Grading & Paving [nc., of Ga s tonia, NC on May 28, 1982. Construc tion work began on June 21 , 1982 . Continuous h eavy r a ins and v andalism of the g r oundwat e r monitoring :wells and the 30-mil PVC liner GUrtailed job progress throughout the month of August, and construction wa s not c ompleted to the stage necessary for PCB p lacement until September 15, 1982 . NC DOT trucks began hauling PCB contaminated soil on from Fort Bragg on October 6 , 1982, and finished on October 27, 1982. Con s truc tion work was complet ed on July 14, 1983. The final inspection of the completed project was conducted on Ju l y 15, 1983 and final acceptance was on that date. CONSTRUCTION SEQUENCE AND DESCRIPTION Initially four groundwater monitoring wells were installed, located north, s outh, eas t, and west of the landfill. These wells were determined to be unsatisfact ory , as designed and ins talled, by t he NC Depar tment of Na tura l Re sources and Community Development. Four -1- replacement wells were installed , immediately adjacent to the original wells. The s e wells were vandalized during construction, and were repaired or redrilled. The wells utilized 4" PVC pipe and screens, with lockable steel caps . An earthen containment structure, 4 76' long and 232 ' wide was built by excavating to bottom elevations sloping from elevation 320 to 314, and filling to a berm elevati on of 342. Side slopes are 3: 1 on the north, west, and east sides, 5: 1 on the south. Topsoil, c l ay, and silt materials excavated were stockpiled separately for later use. A 9" layer of permeable sand was placed on this subgrade a s a lower lea chate collection system, draining to a collection sump and 6" PVC extraction pipe in the northeast corner of the landfill. A 30-mil PVC liner, manufactured by Staff Industries of Detroit, Michigan, was installed over this sand layer. This liner was slashed in 23 places by vandals and was repaired by patching with additional liner material. A one foot thick layer of ~ompacted bridging fill was placed ove r the 30-mil PVC liner, using previously stockpiled clay and silt materials. An upper leachate collection system was placed above the clay liner , using a 9" layer of permeable sand, draining to a collection sump and 611 PVC extraction pipe in the northeast corner of the landfill. As final preparation for the placement of PCB material, a carbon filter system was i nstalled. This system consisted of a sand filter , carbon filter, and temporary holding pond, located just northeast of the landfill. The intent of the system was t o treat excess rainwater collected in the disposal area during PCB placement, but the system was not used during construction beca use a D.H.R. Discharge Permit had not been obtained prior to construction. The system was left in place to facilitate the State in removing water accumulated in the upper leachate collection system during construction. -2- Supac f ilter fabric material, manufactured by the Phillips Pe t r oleum Company, was placed over the upper leacha te collection s a nd layer, to prevent migration of the contaminated soil into the sand layer. The PCB contaminated soil was then hauled and dumped by NC DOT trucks, and by Propst Construction Company on contract with the Department of Defense, and placed and compacted by the construction contractor, to a final top elevation shown on the plans. The a ctual volume of PC B ma t erial placed was approximately 40,000 cubic yards. A one f oot t hick l ayer of compacted bridging fi l l was placed over the PCB soil, again utilizing previously stockpiled clay /silt materials. A two foot thick compacted c l ay liner was constructed over the briding fill, u sing select clay materia l obtained from a second clay borrow area on the sit e. A 10-mil PVC liner, a lso manufactured by Staff Industries of Detroit, Michigan, was installed over this clay liner and sealed to the lower liner. Another one foot thick layer of compacted bridging fill was placed over the 10-mil PVC liner. A 4" PVC pipe gas vent was installed, located at the center point of the landfill. The entire top surface of t he landfill and the 5:1 outslopes were then covered with a one foo t thick layer of topsoil, ut ilizing material previously removed and stockpiled. This area, and a l l adjacent disturbed areas, we r e l imed, fer tilized, seeded , and mulched. A s t eel chain-link fence, with s teel posts was installed around the perimet er of the disposal a rea. -3- EXHIBIT "A" -AREA FIGURES The PCB Waste Disposal Site is located on a 142.3 acre tract, of SR '1604' near Afton, in Warren County. Within this tract, a 19.32 acre area contains the landfill and will be retained in state ownership. The remainder has been deeded t o Warren County , as a buffer zone surrounding the landfill. The inside dimensions of the earthen containment s tructure are 476'x 232 ', or 2.54 acres. The a r ea within the chain-link fence is 300' x 550', or 3 .79 acres . -4- CONTRACT General EXHIBIT "B" -COST DATA CONSTRUCTION COST ORIGINAL COST CHANGE ORDER ADDITIONS $362,619.00 $58,828.09 COST $421 ,447.09 CONSTRUCTION COST SUB-TOTAL $ 421,447.09 -'-----=---- DESIGN & CONSTRUCTION INSPECTION FEES Sverdrup & Parcel $ 78,118.51 -'-----=---- Soil & Material Engineers $ 14,810.11 -'-----=---- DES I GN &-CONSTRUCTION INSPECTION FEES, SUB-TOTAL $ 92,928.62 -------- TOTAL PROJECT COST $ 514,375 .71 -------- -5- GENERAL CONTRACT c.c.o. NO 1 2 3 4 5 6 7 8 9 10 EXHIBIT "C" -CHANGE ORDERS DESCRIPTION New Monitoring Wells Time Extension Time Extension Security Guards Security Guards Security Guards Security Guards Additional Fencing Spray Irrigation System Temporary Seeding & Additional Erosion Control TOTAL -6- AMOUNT $ 6,987.50 -0- -0- 4,214.00 3,923.75 11,558.40 5,493.25 3,323.32 7 ,_456 . 00 15,871.87 $58,828.09 .. EXHIBIT 11 D1111 -CONTRACTORS, SUBCONTRACTORS , & MATERIAL SUPPLIERS GENERAL CONTRACT Prime Contractor -Jim Lineberger Grading & Paving, Inc. Route 2 -Box 77A Gastonia, North Ca rolina 28052 SUBCONTRACT CONTRACTOR Groundwater Monitoring Wells Ezra Mier Associa tes, Inc . Surveyors PVC Liners · Seeding Chain-Link Fence 401 Glenwood Avenue P. 0. Box 12447 Raleigh, NC 27605 Southern Survey, Inc . ·1006 Lamond Avenue Durham, NC 27701 Arkay Corporation 1321 Romany Road Charlotte, NC 28204 Lineberry, Inc. Climax, NC U.S . Steel, Cyc l one Fe nce Charlotte, NC -7- i r, ,, '' I . . 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