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(0fiLAB CORE LABORATORIES <br />' Q UAL I T Y C O N T R O L R E S U L T S <br /> Job Number 990890 Report Date 05/26/1999 <br /> CUSTOMER, IT Croup PROJECT: Southland - Martinez ATTU Shelby Lathrop <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br />' Test Method EPA 8015Mod Batch _ 6381 Analyst evd <br /> Method Description. Total Volatile Petroleum Hydrocarbons Units ug/L <br /> FLS Matrix Spike 04051202 990877-5 05/22/1999 0230 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> Gasoline Range Petroleum Hydrocarbons 1056 1000 0 22 103 _ 50-150 <br /> MSD Matrix Spike Duplicate 139051202 990877-5 OS/22f1495t 0255 <br />' Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> Gasoline Range Petroleum Hydrocarbons 929 1056 1000 0 22 91 50-150 <br /> 12 8 30 <br />' Ma Method Blank 05/22/1999 0505 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> line Range Petroleum Hydrocarbons 3 <br /> LCS Laboratory Control Sample 09051202 05/22/1999 0531 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> Gasoline Range Petroleum Hydrocarbons 1079 1000 0 107 9 50-150 <br /> LCD Laboratory Control SampLe Duplicate 09051202 05/22/1999 0557 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> asoline Range Petroleum Hydrocarbons 1120 1079 1000 0 112 0 50-150 <br /> 3 7 30 <br /> ' Test Method EPA 8020A Batch 6380 Analyst evd <br /> Method Description Volatile Organics -Aromatics Units ug/L <br /> ' MB Method Blank 05/22/1999 0505 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits <br /> enzene 0 00 <br /> thyLbenzene 0 00 <br /> ethyl-t-Butyl Ether (MTBE) 0 00 <br /> Toluene 0 00 <br /> Iy(enes (total) 0 00 <br /> 0 <br /> ' Page 5 <br /> * %=% REC, R=RPD, A=ABS Diff , D=% Diff <br /> In lyl t'd4 II1O onsa ti 1 o s.0 l 1 l lis 16 1 11 Mulw [t rtalo Intl '1 T1s 1pi wf 1 y1 d 11 w it 1 c1 vs 11 t I u <br /> Ias f 1n 111 c[1�asni 111 [ ICo oL11x olfco 1v,ult nl 1 W IM w� I#­s b xi d Nt tIt i o we41[s�_ i � iiYl 1[ 1 n IT r I[, 10 1v. 11 �I 1 �1 11 f 1 [ <br /> I I S 1. u{ 1Y wall u1 s f 1 cit 1 5 5 1 0 1 No 11 loo t l 111 I G L[11 <br />