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SIERRA ANALYTICAL <br /> • GHH Engineering,Inc. ELAP No.: 2320 <br /> 11960 Heritage Oak Pl, Suite 2B Date Sampled: 08/01/01 <br /> Auburn,CA 95603 Date Received: 08/03/01 <br /> Daae Prepared: 08/08/01 <br /> Date Analyzed: 08/08/01 <br /> Sierra Project No.: 0108-044 Analyst: SM <br /> Client project ID: USA-Stockton/5007.9 <br /> Sample Matrix: Water Report Date: 08/13/01 <br /> Oxygenated Fuel Additives(GC/MS) <br /> Preparation Method: Purge&Trap Concentrator(EPA Method 5030) <br /> Analysis Method: EPA Method 8260E <br /> Client Sample No.: MW-2P MW-lP MW-2 <br /> Practical <br /> Quantitation units <br /> Limit <br /> Sierra Sample No.: 22365 22366 22367 <br /> Analytes: <br /> 1,2-DCA 13 10 ND 1.0 Pg/L <br /> MTBE 54 ND ND 0.5 µg/L <br /> DIPE ND ND ND 5.0 pg/L <br /> • ETBE ND ND ND 5.0 gg/L <br /> TAME ND ND ND 5.0 Rg/L <br /> A 130 ND 11 5.0 µg/L <br /> Dilution Factor 1 1 1 C Limits - <br /> Surrogate Recovery: <br /> ibromofluoromethane 103 102 102 80-120 <br /> Toluene-dB 100 101 101 81-117 % <br /> Broinofluorobenzene 1 103 1 103 1 103 1 1 1 74-121 <br /> Quality Assurance/Quality Control Data <br /> C Reference No.: 010808-22361 <br /> Spike Spike up. pie RPD <br /> alytes: n fl QC Limits ° Rec. °a Rec. I Of Limits RPD C Limits <br /> Benzene 82 80- 120 74 80 37-160 7.8 _0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Practical Quantitation Lirnit(PQL)x Dilution Factor <br />