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i t <br /> SIERRA LA©ORATORIES NC <br /> GHH Engineers, Inc Date Sampled 10/21/99 <br /> 8084 Old Auburn Road, Suite E Date Received 10/28/99 <br /> Citrus Hieghts, CA 95610- _ _ 4 Date Prepared -- - —11/3/99- - - - <br /> Sierra Project No 9910-484 Date Analyzed 1 113-1 114199 <br /> _ Analyst _ � _ S,y1__ _ <br /> Client Projeet ID USA-Stockton_ /5007 10 <br /> Sam le Matrix: Water Report Date: 11/5199 , <br /> EPA METHOD 8020-BTEXIEPA METHOD 8015-Gasoime Range Hydrocarbons(C4-C12) <br /> (Pur a&Tray ' <br /> Concentratson.u <br /> Client Sample No MW-6P MW-4P I MW-3P MW-1 MW-2P MW-1P MW-2 MW-5P Practical <br /> Quantitation <br /> Sierra Sample No 9373 9374 9375 9376 9377 9378 9379 9380 Limit, <br /> CO,4NIPOUNDS ug/l <br /> Benzene ND ND ND ND 11 ND ND ND , <br /> Toluene ND ND 73 5 6 10 ND 0 5 <br /> ND ND 05 <br /> Fthylbenzene ND ND ND ND --6--99 <br /> ND ND ND <br /> Total XylenesND ND ND 10 34 ND ND 13 05 <br /> 0 5 ' <br /> %1TBE ND ND 22 81 12 ND ND ND <br /> 50 <br /> Gasoline ND ND 230 260 920 ND 64 100 <br /> 50 <br /> Dilution Factor ' <br /> QC Limits <br /> %Surrogate Recovery 92 93 94 96 100 93 96 90 <br /> 70-126 <br /> QC Sam le lD 991103-9465 Quality Assurance/Quality Control Data ' <br /> Camnounds <br /> LCS Spike Spike Dup QC <br /> /° QC <br /> ° <br /> Rec %Rec % Rec Limits <br /> Benzene 100 94 RPD Limits <br /> Toluene 103 95 98 39-150 37 y0-30 <br /> 99 '46-148 <br /> Ethylbenzene 103 96 32-160 36 0-30 <br /> Gasoltnc 103 97 50-1 <br /> 96 50 3 3 0-30 ' <br /> 50 1 9 0-30 <br /> `D means Not Detected <br /> Repornny Limit(RL)=Prarurn!Quannrnuon Limit(PQL)x Dilution Factor <br /> I_ — <br /> i <br /> vL <br />