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SIERRA LABORATORIES INC <br /> GHH Engineering,Inc. Date Sampled: 8/1/01 <br /> 11960 Heritage Oak Pl,Suite 2B Date Received: 813/01 <br /> Auburn, CA 95603 Date Prepared: 817/01 <br /> Date Analyzed: 8/710I <br /> Sferra Project No.: 0108-044 Analyst: MW <br /> Client Project ID: USA-Stockton/5007.9 <br /> Sample Matrix: Water Report Date: 8/8/01 <br /> EPA METHOD 8020-ETEXIEPA METHOD 8015-Gasoline Range Hydrocarbons(C4-C12) <br /> (Purge&Trap) <br /> Concentration,ug/1 <br /> Practical <br /> Client Sample No.: MW-6P MW-4P MPV-5P MW-3P MRI-la MW-2P MW-1P MW-2 Quantitation <br /> Limit, <br /> Sierra Sample No.: 22360 22361 22362 22363 22364 22365 22366 22367 ug/1 <br /> COMPOUNDS: <br /> Benzene ND ND ND ND ND 100 ND ND 0.5 <br /> Toluene ND ND ND 2.5 _ 4.7_ 11_ ND 2.3 0.5 <br /> EthyIbenzene ND ND ND ND ND 5.1 ND ND 0.5 - <br /> Total Xylenes ND ND ND _ND ND 15 ND ND 0.5_ <br /> MTBE ---_ ND ND ND 20 29 51 ND ND ----- 5.0 <br /> ohne ND ND ND 82 240 2400 ND 63 50 <br /> Dilution Factor 1 1 1 1 1 1 1 1 QC Limits <br /> Surrogate Recovery: 90 93 93 81 108 120 88 101 70-125 <br /> Quality Assurance/Quality Control Data <br /> QC Sample ID: 010807-Blank <br /> LCS Spike Spike Dup QC QC <br /> Compounds %Rec. %Rec. %Rec. Limits RPD Limits <br /> Benzene _ 98 69 83 39-150 18 0-30 <br /> Toluene 98 69 83 46-148 18 0-30 <br /> Ethylbenzene 114 82 97 32-160 17 0-30 <br /> Gasoline 116 149 144 50-150 3.6 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Practical Quantitation Limit(PQL)x Dilution Factor <br /> i <br />