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SIERRA LABORATORrEs INC <br /> F8HH Engineers, Inc. Date Sampled 4/30/99 <br /> 8084 Old Auburn Road, Suite E Date Received. 517/99 <br /> Citrus Hieghts, CA 95510 Date Prepared- 5/12/99 <br /> Date Analyzed 5/12/99 <br /> Sierra Project No.: 9905-130 Analyst: SM <br /> Client Project ID. USA Stockton/ 5007 10 <br /> Sample Matrix: Water Report Date: 5/13/99 <br />' EPA METHOD 8020-BTEX/EPA METHOD 8015-Gasoline Range Hydrocarbons(C4-C12) <br /> (Purge&Trap) <br /> Concentration,u /1 <br /> Client Sample No MW-6P MW-4P MW-3P MW-1 MW-2Method <br /> P MW-1P MW-2 MW-5P Detection <br /> Lunit, <br /> Sierra Sample No: 9667 9668 9669 9670 9671 9672 9673 9674 ugll <br /> CO POUNDS: <br /> Benzene ND ND ND 10 ND ND ND ND 05 <br /> Toluene ND ND ND 13 ND ND ND ND 05 <br /> Ethylbenzene ND ND ND 1 5 ND ND ND ND 05 <br /> Total Xylenes ND 1 ND ND 1 14 ND ND ND ND <br /> 05 <br /> I✓ ND ND 16 130 ND ND ND ND 50 <br /> Gasoline ND ND ND 380 ND ND ND ND 50 <br /> Dilution Factor 1 1 1 1 l 1 1 1 QC Lunits <br /> Surrogate Recovery <br /> 4-BromoIluorobenzene 93 100 100 92 100 97 100 100 1 70-125 <br /> Quality Assurance/Quahty Control Data <br /> QC Sample ID 9905-202-10029 <br /> LCS Spike Spike Dup QC QC <br /> omnounds % Rec. % Rec %Rec Limits RPD Limits <br /> Benzene 99 99 97 39-150 20 0-30 <br /> toluene 98 98 96 46-I48 13 0-30 <br /> =lhNlbcnzene 100 100 _= 98 32-I60 25 0-30 <br /> Gasoline 99 88 $8 50-150 038 0-30 <br /> D mems Not Dlt'Lt,d <br /> Lporttng Limit(RL)_Metltod Detection Limit(\IDL) Dilution Factor <br /> 1 <br /> 1 <br />