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(OIL" CORE LABORATORIES <br /> 1 <br /> Q U A L I T Y C 0 N T R 0 L R E S U L T S <br /> Job Number 991124 Report Date 06/30/1999 <br /> CUSTOMER IT Group PROJECT: Southland - Martinez ATTN: Shelby Lathrop <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> LCS Laboratory Control Sample 09060803 06/29/1999 2023 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> asoltne Range Petroleum Hydrocarbons 887 1000 0 88 7 — 50-150 <br /> LCD Laboratory Control Sample Duplicate 09060803 06/29/1999 2049 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> :asoLirie Range Petroleum Hydrocarbons 820 887 1000 0 82 0 — 50-150 <br /> 7 9 30 <br /> MS Matrix Spike 09060803 991124-10 06/30/1999 0814 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> asoltne Range Petroleum Hydrocarbons 798 1000 0 17 78 50-150 <br /> SD Matrix Spike Duplicate 09060803 991124-10 06/30/1999 16$8 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> asoltne Range Petroleum Hydrocarbons 819 798 1000 0 17 80 50-150 <br /> 2 6 30 <br /> Test Method EPA 8020A Batch 6978 Analyst evd <br /> Method Description Volatile Organics -Aromatics Units ug/L <br /> MB Method Blank 06/29/1999 1711 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 0 00 <br /> Ethylbenzene 0 00 <br /> lethyt-t-Butyl Ether (MTBE) 0 00 <br /> oluene 0 00 <br /> ylenes (total) 0 00 <br /> LCS Laboratory Control Sample 09062503 06/29/1999 1829 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> 46 79 50 93 6 39-150 <br /> IKenzene <br /> thylbenzene 44 39 50 88 8 32-160 <br /> ethyl-t-Butyl Ether (MTBE) 321 23 250 128 5 50-150 <br /> Toluene 1 45 83 50 91 7 46-148 <br /> �ylenes (total) 139 46 150 93 0 75-125 <br /> I <br /> I I <br /> II 1 r I I I 1, I I I I I I I 1 1 i <br /> E II I II 4 IE I Pagel 13, <br /> E * %=Y REC, R=RPD, A=ABS Diff , D=% Diff <br /> Tna&hdyTa:al raeA.opasona or interpralal ons contanad m Inn rope 1 ere basad uw,Inlhrmahan and materlsl nppli by the Gent for rvM1oae a cluslve enl canlgentul use tMs r"p t has been male IM aralyecal eauas ownwrs or nlarq el a!lona <br /> B Pfms reW aaant the beat ludgmenl of Cera La ,atoms Care L bona) Iws.awr mases r warrantY a BOrese bll a Press or.01 el of env 1'.Gil ea ..'Y d a 1l o same as t0 the IXodoCt_ly P."'oparallon9 o pOlradenpea o{ i ' r <br /> I'r �I any dl gas coal w'wrer miner al wopertY veal i latW m WMeGtiOn.inn wM1 ch ouch teporl a Used q rel xl opon Wr any reaaoe whatsoavr Ths aPwl slop twl be rawwucad m whole or n part wnhcul the..rAlen aPProval of Ca a I.aporarorgs ` I <br /> i I I 1 EI III r e Il i Ill` I I I�l <br /> It <br /> r I <br />