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OULAB <br /> CORE LABORATORIES <br /> i <br /> Job Number 991123 Report Date 06/30/1999 <br /> I <br /> CUSTOMER IT Group PROJECT- Southland - Martinez ATTU Shelby Lathrop <br /> QC Type Description Reag Code Lab ID Dilution Factor Date Time <br /> MSD Matrix Spike Duplicate 09062503 991104-1 06/29/1999 1817 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> enzene 49 56 50 62 50 0 00 99 1 39-150 <br /> 2 20 <br /> Ethylbenzene 48 57 49 36 50 0 00 97 1 32-160 <br /> 2 20 <br /> ethyl-t-Butyl Ether (MTBE) 225.00 226 75 250 0 00 90 0 50-150 <br /> Toluene 49 34 50 90 50 0 00 98 7 2546-148 <br /> 3 20 <br /> 1yLeries (total) 141 72 144 99 150 0 00 94 5 75-125 <br /> Z 20 <br /> Test Method EPA 8020A Batch 6994 Analyst evd <br /> Method Description Volatile Organics -Aromatics Units _ ug/L <br /> Method Blank 06/29/1999 1958 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 0.00 <br /> thylbenzene 0 00 <br /> ethyl-t-Butyl Ether (MTBE) 0 00 <br /> oluene 0 00 <br /> Xylenes (total) 0 00 <br /> LCS Laboratory Control Sample 09062503 06/29/1999 2114 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Catc Result * Limits F <br /> ttenzene 49 55 50 99 1 39-150 <br /> hylbenzene 48 84 50 97 7 32-160 <br /> Methyl-t-Butyl Ether (MTBE) 224 75 250 89 9 50-150 <br /> Toluene 49 65 50 99 3 46-148 <br /> �yienes (total) 143 53 150 95 7 75-125 <br /> LCD Laboratory Control Sample Duplicate 09062503 06/29/1999 2140 <br /> Parameter/Test Description QC Result QC Result True Value Orig Value Calc Result * Limits F <br /> Benzene 49 01 49 55 50 98 0 39-150 <br /> 1 1 20 <br /> thylbenzene 48 30 48 84 50 96 6 32-160 <br /> 1 1 20 <br /> lethyl-t-ButyL Ether (MTBE) 223 23 224 75 250 89 3 50-150 <br /> 0 7 25 <br /> oluene 49 31 49 65 50 908 7 2046-148 <br /> ylenes (total) 142 79 143 53 150 95 2 75-125 <br /> 0 5 20 <br /> Si <br /> i Page 17 <br /> REC, R=RPD, A=ASS Diff D=% Diff <br /> eve Wylitdl eSnfie the ntw s a•me Pralal woe cool ainao curies repdt era bese0 upon InbrmalMn a�mdtarial nvOptKO OY In se mol Ior wnp3a B Clyyya aM C0n1E9nIWl use Inas repel hes been rtatle the areeyt�II ttnvy9 vpnvna a nlar?'ald IU i <br /> n—rap esan[1 n be 1 l dqr 1 0l Cme Lalxlral W es Cage Lahvra as Mweyer makes M wartarily w lapr9senlerax�a IXass a mesad of any type am a'aaely a svleima Sdme as Iv Ire P,o 1 ty v peer 9Pera1pn3IX poalablanegs pl <br /> dny cl 9as coal o o al p peer.,nal.IX s.-n nn _-1h wlttvn such aper,s setl w rK�.P I w any tsa wt elspa w Th.report shalt rqt be regotlacerl n wnpla 0 p w wine t arl ePPrpual.1 Cd Lapp atorres <br />