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SIERRA LABORATORIES INC ' <br /> GHH Engineering,Inc. Date Sampled: 10/31/00 , <br /> 8084 Old Auburn Road, Suite E Date Received: 11/9100 <br /> Citrus Heights, CA 95610 Date Prepared: 1I/14/00 <br /> - Date Analysed: 11114/00 <br /> Sierra Project No.: 0011-2I4 Analyst: M <br /> Client Project H): USA-Stock--ton 15007.10 r <br /> Sample Matrix: Water Report Date: 11/15/00 ' <br /> EPA METHOD 8020-BTEMPA METHOD 8013-Gasoline Range Hydrocarbons(C4-C12) <br /> (Purge&Trap) <br /> Concentration,:u <br /> Practical <br /> Client Sam le No.: MW-e MW-4P MW-51? MW-3P MW-1 MW-2P MW-1P MW-2 Quantitation <br /> Terra Sample No.: 32594 32595 32596 32597 32598 32599 <br /> 32600 32601 UO <br /> CONIPOUNDS. , <br /> Benzene ND ND ND 0.72 ND 33 ND ND 0.5 <br /> oluene 1.0 ND 4.61 5.7 4.4 11 I.1 1.7 0.5 <br /> thylbenzene 1.3 ND ND ND ND 2.0- ND ND 0,5 ' <br /> total Xylenes 0.61 ND ND ND ND 3.9 ND ND 0.5 <br /> MTBE ND ND ND 31 12 32 ND ND 5.0 <br /> Gasoline ND ND 120 110 76 1200 ND ND 50 ' <br /> Dilution Factor 1 1 1 1 1 1 i 10CU.it, 1 <br /> %v Surrogate Recovery: 1 99 92 73 120 98 120 125 117 70-I25 <br /> 1 <br /> Quality Assurance/Quality Control Data <br /> QC Sample ID: 001114-Blank <br /> LCS Spike Spike Dup QC QC , <br /> Compounds %Rec. % Rec. %Rec. Limits RPD Limits <br /> Benzene 80 86 97 39-150 12 0-30 <br /> Toluene 82 88 99 46-148 12 0-30 ' <br /> Rhylbenzene 82 88 99 32-160 12 0-30 <br /> 3asoline 89 79 89 50-150 12 0-30 <br /> M means Not Detected " ' <br /> —';egvrtEag limit(RL)=Practical QUan@ration Ismit(PQL)"a Diltttio>j Factor <br />