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SIERRA ANALYTICAL <br /> GHH Engineering, Inc. FLAP No.: ?3?0 <br /> 8084 Old Auburn Road, Suite E Date Sampled: 0=1/30/01 <br />' Citrus Heights, CA 95610 Date Received: 05/03101 <br /> Date Prepared: 05/04/01 <br /> Date Analvzed: 05/04/01 <br /> Sierr:z Project No.: 0105-056 Analyst: SM <br /> Client Project ID: USA-Stockton/5 007.10 <br /> Sample Matrix: Water Report Date: 05/07/01 <br />' Oxygenated Fuel Additives(GOMS) <br /> Preparation Method: Purge&Trap Concentrator(EPA Method 5030) <br />' Analysis Method: EPA Method 8260E <br /> FClient Sample No.: MW-2P MW-1P MW-2 <br /> Practical <br /> Quantitation Units <br />' Sierra Sample No.: 13934 1393 13936 Limit <br /> Analytes: <br />' 1,2-DCA ND 25 ND <br /> 1.0 pg/L <br /> MTBE 40 8.2 ND 1.0 pg/L <br />' DIPE ND 14 ND 5.0 pg/L <br /> ETRE ND ND ND 5.0 pg/L <br />' TAME ND ND ND 5.0 µg/L <br /> TBA ND ND 18 5.0 pg/L <br />' Dilution Factor i 1 1 QC Limits - <br /> Surrogate Recovery: <br /> Dibranwtluoratrtethane 98 102 100 80-120 <br />' Toltiene-d3 100 [of l00 81-117 <br /> 14-Brornotluorobenzene 100 101 102 74-121 <br /> Quality Assurance/Quality Control Data <br /> QC Reference No.: 010504-13985 <br /> Analytes: Spike Spike up. Spike RPD RPD <br /> Rec. QC Limits % Rec. % Rec. QC Limits QC Limits <br /> ' MTBE 98 80- 120 92 96 37 -160 4.3 0 - 30 <br /> LND means Not Detected <br /> Repurtia Limit(RL)=[Tactical Quantitation Limit(PQL)x Dilution Factor <br /> 1 <br /> 1 <br />