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SIERRA ANALYT;CAL <br />' GHH Engineering, Inc. ELAP No.: 2320 <br /> 8084 Old Auburn Road, Suite E Date Sampled: 07/11/00 <br /> Citrus Heights, CA 95610 Date Received: 07/13/00 <br />' Date Prepared: 07/21/00 <br /> Date Analyzed. 07/21/00 <br /> Sierra Project No.: 0007-227 Analyst: SM <br />' Client Project ID. USA-Stockton / 5007 10 <br /> Sample Matrix: Water Report Date: 07/26/00 <br />' Oxygenated Fuel Additives(GC/MS) <br /> Preparation Method Purge &Trap Concentrator(EPA Method 5030) <br /> Analysis Method EPA Method 82608 <br /> Client Sample No MW 6P Mw-4P Mw-5P MW-3P Mw-1 <br />' Practical <br /> Quantitation Units <br /> Limit <br /> Sierra Sample No. 21278 21279 21280 21281 21282 <br /> Analytes <br /> ' 12-DCA 51 ND ND 11 ND 10 µg/L <br /> MTBE ND ND ND 71 33 10 µg/L <br /> D1PE 21 ND 140 63 ND 50 µg/L <br /> ETBE ND ND ND ND ND 50 pg/L <br /> TAME ND ND ND ND ND 50 pg/L <br /> ' TBA ND ND 12 13 ND 50 gg/L <br /> Dilution Factor 1 OC Limits - <br /> ' Surrogate Recovery <br /> Dibromofluoromethane 83 87 84 86 86 80-120 <br /> Toluene-dS 99 106 108 107 101 81-117 % <br /> ' -Bromofluorobenzene 95 1 86 94 92 89 74-121 <br /> Quality Assurance/Quality Control Data <br /> C Reference No.: 000721-21278 <br /> Analytes• LCS LCS Spike Spike Dup. Spike RPD RPD <br /> % Ree C Limits % Rec % Ree C Limits QC Limits <br /> MTBE 104 80- 120 102 104 37 - 160 1 9 <br /> ' ND means plot Detected <br /> Reporting Lirrut(RL)=Practical Quantitation Limit(PQL)'c Dilution Factor <br /> r <br />