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i <br />.~P,~ <br />i <br />CORE LABORATORIES <br />Q U A L I T Y C O N T R O L R E S U L T S <br />Job Number; 980539 Date: 03/25/98 <br />CUSTOMER: Greystone PROJECT: COSTI LLA CNTY 484-03 ATTN: Nick Mathis <br />OC Type Description Reag. Code Lab ID Dilution Factor Date Time <br />Test Method........: SN-846 8020 Batch........: 31971 Analyst ...; max <br />Method Description.: Volatile Organics -Aromatics Uni[s........: ug/L <br />NB Method Blank ~ 03/05/98 7647 <br />Parameter/Test Description OC Resul[ OC Result True Value Orig. Value Calc. Result • Limits <br />Benzene ND 0.5 <br />E thylbenzene ND ~ 0.5 <br />Toluene ND 0.5 <br />Xylenes (total) ND 0.5 <br />LCS Laboratory Control Sample T980305C 03/05/98 t724 <br />Parameter/Test Description OC Result OC Result True Value Orig. Value Calc. Result • Limits <br />Benzene 78.782 20.70 90.5 X 39-150 <br />E thylbenzene 19.379 20.08 96.5 X 32-160 <br />Toluene 78.785 20.08 93.6 X 46-148 <br />Xylenes (total) 57.982 60.26 96.2 X 75-125 <br />LCD Laboratory Control Sample Duplicate T980305C 03/05/98 7807 <br />Parameter/Test Description oC Result OC Result True Value Orig. Value Calc. Result • Limits <br />Benzene 19.192 78.182 20.70 95.5 X 39-150 <br />5.4 R 25 <br />Ethylbenzene 20.437 19.379 20.08 701.7 X 32-160 <br />5.3 R 25 <br />Toluene 79.787 18.785 20.08 98.5 X 46-148 <br />5.2 R 25 <br />xylenes (total) 60.925 57.982 60.26 101.1 X 75-125 <br />5.0 R 25 <br />MB Method elenk 03/06/98 0833 <br />Parameter/Test Description OC Result OL Result True Value Orig. Value Calc. Result • Limits <br />Benzene ND 0.5 <br />Ethylbenzene ND 0.5 <br />Toluene ND 0.5 <br />Xylenes (total) ND 0.5 <br />LCS Laboratory Control Semple T980305C 03/06/98 1276 <br />Parameter/Test Description aC Result gC Result True Value Orig. Value Calc. Result • Limits <br />Benzene 16.962 20.70 84.4 X 39-150 <br />E thylbenzene 18.180 20.08 90.5 X 32-160 <br />Toluene 18.165 20.08 90.5 X 46-148 <br />Xylenes (total) 53.730 60.26 88.2 X 75-125 <br /> Page B <br /> • X-X REC R-RPD A-ABS Diff. D-X Diff. <br />Te ~ +~i r+.nwi. oo~on~ y nu O~eu~~m~ con ia~nw ~n ~n.a room <br />/prn.ngr'im. p~riwyrwi al CV. uv~ao'~Car. t~m are GIN umn.nla m.~y. ~p mn~rui woolen or ine ern nor ~ryy ncv». ono to~b~ui .u, imp ~~pn ~.. o.n mu. ~n, <br />~nnwa,neM.n m~uM1px W~a~p-~~.algn ~.a~v a.+Aw]dLn~p a+a uw.ury M[~Yn~rm.u ovw moo ~c yyi.~ui ~eM~a oo~a~. o <br />iromf ao~n+v.u o ~ niw orn~um. <br />roM rt/ry~a ai <br />a~~ d W.vJ rv aw r~~.~ pom ~. w ar r'q n tanaim mn nTn ~~ ~YVt ~ u~l ~ ~rl.xn ~w nY •~m ~Nivw~ iti rpy~ ub Fi 0~ rqw¢~], n nrw v n M...Ihvi dry wnin ~Nw~ el fib Ym~Nr~ <br />