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Home My WebLink AboutNCD980602163_19830701_Warren County PCB Landfill_SERB C_Crime Control & Public Safety Final Report-OCRI I I I I I I r ..... 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 f ' . '...!_•)t , llr, J· ·1 . ., I I If I I 1 I I GENERAL DESCRIPTION FINAL REPORT PCB WASTE DISPOSAL SITE WARREN COUNTY The PC B Was te Dispos a l Site is a hazardous waste landfill, containing approximately 40,000 cubic yards of polychlorinated biphenyl (PCB ) contaminated soil, located in Warren County, North Carolina . PERTIN ENT DATED Contract or's bids f or the construction of the site were opened on January 21 , 1982, and the contract was awarded to Jim Lineberger's Grading & Pavi ng Inc ., of Ga s tonia, NC on May 28, 1982. Const ruction work began on June 21 , 1982. Continuous heavy r a ins and vandalism of the groundwat e r monitoring ·wells and the 30-mil PVC line r c;:urtailed job progress throughout the month of August, and construction was not completed to the s t age neces sary for PCB placement until September 15, 19 82 . NC DOT trucks began hauling PCB contaminated soil on from Fort Bragg on October 6, 1982, and finished on Octobe r 27, 1982 . Cons truction wo rk was complet ed on July 14, 1983. The final inspec tion of the completed project was condu cted on Ju l y 15, 1983 and final acceptance wa s on that date. CONSTRUCTION SEQUENCE AND DESCRIPTION Initially four groundwater monitoring wells were i nstalled, located north, south , east, and west of the landfill. These wells were determi ned to be unsatisfact or y , as designed and install ed, by the NC Depar tment of Natura l Re s ources and Community Development. Four -1- replacement wells were installed, immediately adjacent to the original wells. These 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 elevation of 342. Side slopes are 3:1 on the north , west, and east sides, 5:1 on the south. Topsoil, clay, and silt materials excavated were stockpiled separately for later use. A 9" layer of permeable sand was placed on this subgrade as a lower leachate 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 wi th additional liner material. A one foot thick layer of compacted bridging fill was placed ove r the 30-mil PVC liner , using previously stockpiled clay and silt materials. An upper leachate collection system wa s placed above the clay liner, using a 9" layer of permeable sand , draining to a collection sump and 6" PVC extraction pipe in the northeast corner of the landfill. As final preparation for the placement of PCB material, a carbon filter system was installed. This system consisted of a sand filter , carbon filter, and temporary holding pond, located just northeast of t he landfill . The intent of the syst em was to treat excess rainwater collected i n the disposal area during PCB placement, but the system was not used during construction because 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 cons truction. -2- Supac f ilter fabric material, manufactured by the Phillips Pet r o leum Company, was placed over the upper leachate collection sand layer, to prevent migration of the contaminated soil into the sand layer. The PCB contaminated soil was then hauled and dumped by NC DOT truck s, 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 actual volume of PC B material placed was approximately 40,000 cubic yards. A one foot thick layer of compacted bridging fi l l was placed over the PCB soil, again u tilizing previously stockpiled clay /silt materials. A two foot t hick compacted c l ay liner was constructed over the briding fill, u sing select clay material obtained from a second clay borrow area on the site. A 10-rnil PVC liner, a lso manufactured by Staff Indus tries 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 place<l 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 outsl opes were then covered with a one foot thick layer of topsoil, u t ilizing material previously removed and stockpiled. This area , and all adjacen t disturbed areas, were limed, fertilized , seeded , and mulched. A s t eel chain-link fence , with s teel posts was installed around the pe rimet er of the disposal area. -3- I '' EXH IBIT "A" -AREA FIGURES The PC B Waste Di sposal Site is located on a 142.3 acre tract, of SR '1604' near Afton, in Warren Co unty. Within this tract , a 19.32 acre area contains t he landfill and will be retained in s tate ownership. The remainder has been deeded t o Warren County, as a buffer zone surrounding the landfill. The ins ide dimensions of the earthen containment s tructure are 476 'x 232 ', or 2.54 acres. The area within the chain-link fence is 300' x 550', or 3 .79 acres . ,, 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 & Ma terial Engineers $ 14,810.11 --'------=---- DES IGN &· 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 Ex tension Security Guards Security Guards Security Guards Se curity 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 Lineb erry, Inc. Climax, NC U.S. Steel, Cyclone Fence Charlotte, NC -7- ! I ,. I i I .. 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