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SIERRA LABORATORIES INC ' <br /> oil <br /> GHH Engineers, Inc Date Sampled 7117198 <br /> 8084 Old Auburn Road,Suite E Date Received 7/18/98 ' <br /> Citrus Hieghts, CA 95610 Date Prepared 7/20/98 <br /> Date Analyzed 7/20/98 1 <br /> Sierra Project No 9807-170 Analyst SM <br /> Client Protect ID USA-Stockton/5007 10 <br /> Sample Matrix Water Report Date 7122/98 ' <br /> EPA METHOD 8020-BTEXIEPA METHOD 8015-Gasoline Range Hydrocarbons (C4-C12) <br /> (Purge & Trap) ' <br /> Concentration, u /L <br /> Client Sample No MW-4P MW-6P MW-3P MW-1 MW-2P MW-IP MW-2 MethodDetection <br /> Lima, <br /> Sierra Sample No I0056 10057 10058 10059 10060 10061 10062 Lim <br /> fL <br /> COMPOUNDS ' <br /> Benzene ND ND 1 0 ND 490* 096 ND 0 5 <br /> Toluene ND ND 9 7 9 9 16 ND ND 0 5 <br /> Ethylbenzene ND ND 0 87 0 58 140 ND ND 0 5 ' <br /> Total Xylenes ND -ND 1 8 1-3 30 055 ND 0 5 <br /> MTBE ND ND ND ND ND ND ND 5 0 <br /> Gasoline ND ND 520 520 3100 ND 56 50 <br /> 1 <br /> Dilution Factor 1 I 1 1 1 , 5* 1 1 QC Limits <br /> %Surrogate Recovery <br /> 4-Bromofluorobenzene 92 100 110 105 1 105 100 85 70-125 <br /> IFQuality Assurance/Quality Control Data 1 <br /> C Sample ID 9707-144-9964 <br /> LCS Spike Spike Dup QC QC <br /> Compounds % Rec %Rec % Rec Limits RPD Limits <br /> Benzene 113 88 90 39-150 _ 2 2 0-30 - <br /> Toluene 113 98 98 46-148 0 3 0-30 <br /> Ethylbertzene 113 100 100 32-160 0 3 _ 0-30 ' <br /> GasolineL�::83I00 93 50-150 6 9 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)—Method Detection Limit(MDL)a Dilution Factor 1 <br /> 1 <br /> i <br /> 1 <br />