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I <br /> SIERRA ANALYTICAL <br /> I <br /> 7GHH Engineering, Inc. ELAP No.: 2320 <br /> Heritage Oak P1, Suite 2B Date Sampled: 10/17/01 <br /> rn,CA 95603 Date Received: 10/23/01 <br /> Date Prepared: 10/23/01 <br /> Date Analyzed: 10/23/01 <br /> Sierra Project No,: 0110-386 Analyst: SM <br /> Client Project ID: USA-Stockton ! 5007.10 <br /> Sample Matrix: Water Report Date: 10/24/01 <br /> Oxygenated Fuel Additives(GCMS) <br /> Preparation Method: Purge&Trap Concentrator(EPA Method 5030) <br /> Analysis Method: EPA Method 8260D <br /> Client Sample No.: MW-41? MW-6P MW-5P MW-3P MW-1 <br /> Practical <br /> Quantitation units <br /> Limit <br /> Sierra Sample No.: 28863 28864 26865 28866 28867 <br /> Analytes: <br /> 1,2-DCA ND 2.0 5.9 2.3 1.7 1.0 Ag/L <br /> MTBE 1.5 ND 0.50 23 43 0.5 ug/L <br /> 1PE ND 16 110 7.1 ND 5.0 Ag/L <br /> TBE ND ND ND ND ND 5.0 ug/L <br /> AME ND ND ND ND ND 5.0 ug/L <br /> A ND ND ND ND ND 5.0 tCg/L <br /> Dilution Factor 1 1 1 1 1 OC Limits - <br /> Surrogate Recovery: <br /> Dibromofluoromethane 118 117 116 115 116 80-120 <br /> Toluene-d8 100 100 99 100 100 81-117 % <br /> -Bromofluorobenzene' 99 100 100 99 100 1 74-121 <br /> Quality Assurance/Quality Control Data <br /> C Reference No.: 011023-28870 <br /> Analytes: LCS LCS Spike Spike Dup. Spike RPD RPD <br /> % Rec. C Limits % Rec. % Rec. C Limits OC Limits <br /> MTBE 90 80- 120 98 96 37-160 2.1 0- 30 <br /> ND means Not Detected <br /> Reporting Limit(RL.)=Practical Quantitation Limit(PQL)x Dilution Factor <br />