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Home My WebLink AboutNCD980602163_19900214_Warren County PCB Landfill_SERB C_PCB Landfill Report by Harold Diot-OCRState of North Carolina Department of Environment, Health, and Natural Resources Division of Solid Waste Management P.O. Box 27687 · Raleigh, North Carolina 27611-7687 James G. Martin, Governor William W. Cobey, Jr., Secretary Mr. Harold Diot February 14, 1990 Ogden Environmental Services Post Office Box 85178 San Diego, California 92138-5178 Dear Mr. Diot: William L. Meyer Director Enclosed is a copy of the PCB Landfill Report you requested by telephone on February 14, 1990. Sincere lb.. ~-C~r~ Environmental Supervisor Permitting Branch Hazardous Waste Section JAC/mb/0183-117 Enclosure cc: Bobby Lutfy, Solid Waste Section • --- RENOVATION OF THE P.C.B. LANDFILL This report demonstrates the need for certain repairs to the P.C.B. Landfill in Warren County. After a recent inspection of the facility, there were a number of deficiencies found. At the time of the inspection there was found to be an accumulation of leachate in the collection system. This level was obtained by removing the collection pipe and taking an actual measure of the fluid in the hole. This was found to be 42 feet. The collection pipe is sloping at a rate of 1 foot drop per 3 feet of horizontal length. Thus, using trigonometry the vertical head was calculated to be 13.28 feet. Using this value the volume of leachate was calculated, (see charts). There was found to be approximately 1,000,000 gallons of accumulated leachate. This accumulated leachate demonstrates a need for a properly functional collection system. The following is a list of recommended repairs, including the leachate collection system as well as other noted deficiencies: LIST OF RECOMMENDED DEFICIENCIES AND SOLUTIONS AT THE PCB LANDFILL. 1. Cable at front entrance inoperative SOLUTION-Re-cement end post in ground -Place lock on cable Place warning sign on cable 2. Monitoring wells not of standard design SOLUTION-Replace wells with 2" inner casing using monitoring well standards and abandoning existing wells. *Approximate cost per well -$2,750.00 3. Mis-aligned security fences accessing landfill SOLUTION-Re-align using appropriate methods 4. Inoperative leachate detection probe SOLUTION-Replace or repair unit 5. Inoperative leachate collection system SOLUTION-Replace foot valve at end of collection pipe -Repair various cracks and leaks in the system *Cost of foot valve -$24.80 6. Inoperative irrigation system SOLUTION-Replace combination foot valve/strainer on pump pickup pipe Replace missing flexible hose on sprinkler pipe *Cost of foot valve -$24.80 1.'-lATER VOLUME CALCULATIONS WATER LEVEL IN FEET AS VERTICAL HE.AD FT3 MEASURED ON LEACHATE PIPE ELEVATION IN FEET X y z GAL 8 -6.32 314 -316 0 -2 75, 100' 2 15,000 112,200 6.32 -12.64 316 -318 2 -4 90' 200' 2 36,000 269,280 12.64 -18.96 318 -320 4 -6 100' 300' 2 60,000 448,800 18.96 -25.28 320 -322 6 - 8 113' 319' 2 72,094 539,263 25.28 -31.60 322 -324 8 -10 125' 333' 2 83,250 622,710 31.60 -37.92 324 -326 10 -12 138' 350' ") 96,600 722,563 "--37.92 -44.24 326 -328 12 -14 145' 363' 2 . ___ 1 0 5 , 2 7 0 787,420 44.24 -50.56 328 -330 14 -16 157' 381' 2 119,634 894,862 50.56 -56.88 330 -332 16 -18 169' 394 I 2 133,172 996,127 5.6.88 -63.20 332 -334 18 -20 181' 412' 2 149,144 1,115,597 63.20 -69.52 334 -336 20 -22 194, 425' 2 164,900 l,233,4:i2 -•<> ~ . " ELEVATION 314 -316 316 -318 318 -320 320 -322 322 -324 324 -326 326 -328 328 -330 330 -332 332 -334 334 -336 GALLONS OF LEACHATE AT VARIOUS LEVELS BASED ON POROSITIES GALLON GALLON 100% POROSITY 40% POROSITY 50% 112,200 44,800 56,100 269,280 107,712 134,640 448,800 179,520 224,400 539,263 215,705 269,631 622,710 249,084 311,355 722,568 289,027 361,284 787,420 314,968 398,710 894,862 357,945 447,431 996,127 398,451 498,064 1,115,597 446,239 557,799 1,233,452 493,381 616,726 GALLO 60'=h 67,32 161,56 269,28 323,55 373,62 433,54 472,45 536,91 597,67 669,35 740,07 N 0 8 0 8 6 1 2 7 6 8 1 WATER LEVEL IN FEET AS MEASURED ON LEACHATE PIPE 0 6.32 12.64 18.96 25.28 31 .60 37.92 TOTAL ACCUMULATED LEACHATE ELEVATION 314 316 318 320 322 324 326 TOTAL ACCUMULATED LEACHATE FROM EACH LEVEL AT 40% POROSITY IN GALLONS 0 44,880 152,592 332,112 5 47,817 796,901 1,085 ,928 ---------------+------......--------LEACHATE LEVEL 44.24 50.56 56.88 63.20 69.52 328 330 332 334 336 1,400,896 1,758,841 2,157,292 2 ,603,531 3,096,912 LAND Fill ... --·G/\S VErH f . I ~ Y.L t \\/ ';/~,, J --// I . . , J1_ .-•:.~~·~~:-·.,-:•.·""·•'--:-,-.---c-. ::__ ~; \lE!.Ct1_.TE RE ~OVAL -~~-". ~y~,r-rf .:::::ir'\;,-f Y~ .r~~~•-• .. · ... '),-.. -._ ·-· .·•.·.--:--·.·:-.--:~ ......._ . . 1/ \'LEAC~\,.'..TE ~~·-~/ ovECT10:1 . ·f" _ff ·~ ·~r[j·. I' ,~ -, --~· -..... -t m (\~~.·\ ~~ ---=:-.-..:.::-~"'5.,' •. ( ) :4· ~~,...... -/,. f t' ,, N\~' ----=~ , \ , ,;;;i,·. --1 L✓ \f.... -V . " • ·· \. 1::,,: X .._ _ • ~-l c. v .u.:\ L c:-,,,:.·• 1-, z: , ----+• r ~ . CROSS-SECTION ......._ 3 r-l IN .:'>'-CI C '·1 3 ,-.. __,..ae__l -,,;.1 -~l / . -/"' '>,\/ I l(JjJJJ~MJiJ!JJJl{lJJJZilJ:!JJfJ%~7 .. , \~·············. ···~A~UR·;~·•·~·,:R·TH···~~/fY1···~$~:g.·~)1A~7/ ,.'. ~ -) _, ~""' -)t'1 7 / / < f.'.8L.E. [ I ! --/ _, / I I :-<:;, rJ s 'f---\ s C) ) -'t L l: ":) L---ltt :> ---·--· ---l l ·~ c "' 3 s c ) 1'---7.18 1 , _ _ I ) g u ff 6 K L r AC r A TE cc L, r. c. i i < '< . I :: At:';; I 'Su -5 H "e 1 5 , ?7 \Z:, D TOP SOIL 3 ~c/ -Lo,v !..r-~ \ O'i" 7 /18' -G-A L/ c\,,,~s;c F bCl .. LEACHATE COLLECTION $'(STE.~. Q 8 ARTIFICIAL LIN ER PRO 1·ECTC ,7'5 -°{11 _;$~;VJ) ~ ARTIFICIAL LINER .L S-0 -i.:;-0°)0 ro:zr.,S r J / NU I I U ~l, A~ t. D CLAY LINER (j_O-~\. ~l/l £ 0 F Lb'~--\ c_ rl c\:-TE-( f-v D N.D.TURti.L EARTH - -ORIGINAL GROUND SURFACE L 17 A Cl+ Arr:: :S (\rv l) l s I)_[' if!_ ,0 f--1 ,"\ /(1"' T I '-\'1 I 2-0 '.';, C-,!) L5, I I '.\ 1' \ I FOOT TOP SOIL ARTIFICIAL LINER SYSTEM 2FOOT COM?.:.CTEO CLAY LINER ___ .., BR, 0 GI W3 1,1 ~ ~t:::•: SOIL S PCB WASTE MIXTURE CONCEPTUAL PLAN CROSS-SECTION DETAIL ·I LEACHATE COLLECTION SYSTEM .......__ .. 1········••:•:••····················· 5 FOOT COM PAC TEO CLAY LINER "-... •R ,,,,c,•L LINER· 1wmEemtrn:1ittmmmrnrnit~~;Jmm~rnf m~//; \ NA TuR;.L EARTH 4,.v,..< v::::::::::·.:::•.U:f •··,'\,'' I /i~\ ::::::::::;:<;:::::::::::: LEACHATE OE TEC TION SYSTEM FIGU~E 2. LEACH A TE R'.:l.!J';A PIPES 3rS NOT TO SCALE -- . --, ' ' ' \ \ ' \ \ ' \ \ ' \ ' \ \ \ ' \ \ " \ \ \ ' ' \ \ \ \ ' \ ) ' \ ' ' \ i \' ,, ' . ,\• I (\J ' -,...,. 0 ~ rt J ~ --.. ·c 0 r<) N r<) r<) w Ji.'' I I I I ( I ' I I ' ' ~H 10L ,'-5 I I I I .::.1 -1 LL 0 <t: _J lL / o, I I I . " I I I I ,o N r<> l L--.,, -/-1st l (\I-;;":/ I ,' I '' ' ' I ,, . !, . ' \ ' ' ' ---------·--3c.J OlS I :'r~ . ........ ·- - · 1-. ·- \. l..i 0 0 00 CJ) I , I I I I I I I I I 0·91 I I I I ' I '· . I I , I I ' ' ..., ,_ J ' / ' I ...,, Lu ~r-.... Cf) lO (J) ' ~ ' ' ,. I I t:. ' ·,\ i_.',1 ' .. l J!li }1.: '~)j '-f ,, ' ,·it ''! I / / / ( I I I , / I \ \ ' ' ' ' ' I I I I I I I I I I I / / ,. / I / ( I I / -I I I' I I I I I 'o 'tfi ~ I 'r ,'( I I In conclusion, there is a definite need for a budget to take care of these present needs as well as the ongoing maintenance and operating costs.