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SIERRA ANALYTICAL <br /> GHH Engineering, Inc. ELAP No.. ?;20 <br /> 8084 Old Auburn Road, Suite E Date Sampled: 04/06/00 <br /> Citrus Heights, CA 95610 Date Received- 04/15/00 <br />' Date Prepared. 04/19/00 <br /> Sierra Protect No. 0004_„7 Date Analyzed: 04/19/00 <br /> Analyst. WCH <br /> CIient Project ID: USA-Stockton 5007 10 <br />' Sample Matrix: Water Report Date. 04/20/00 <br />' Oxygenated Fuel Additives (GC/MS) <br /> Preparation Method Purge&Trap Concentrator(EPA Method 3030) <br />' Analysis Method EPA Method 8260E <br /> Client Sample No, MW-6P MW-4P MW-3P MW-1 MW-2P <br />' Practical <br /> Quantitation Units <br /> Sierra Sample No 9562 9563 9564 9565 9566 Limit <br /> Analytes <br /> 1,2-DCA 56 ND I I ND 87 10 µg(L <br /> MTBE ND 068 55 72 79 05 gg/L <br /> E 23 ND 10 ND ND 50 µg/L <br /> thanol ND ND ND ND ND 50 ul/L <br /> ETRE ND ND ND ND ND 50 pg/L <br /> TAME ND ND ND ND ND 50 µg/L <br /> TBA ND ND 14 ND 10 50 gg/L, <br /> Dilution Factor I 1 I 1 1 QC Limits - <br /> (o-urrogate Recovery <br /> ibromotluoromethane 91 92 95 95 97 80-120 <br /> oluene-d8 93 92 94 97 95 81-117 % <br /> Bromofluorobenzene 88 87 9I 93 90 1 74-121 <br /> C Reference Na 0004I9-BL Quality Assurance/Quality Control Data <br /> nalytes Spike Spike Dup pie D <br /> Rec C Limits %Rec % Rec. QC Limits RPD QC Limits <br /> TBEI1 8 - 120 117 138 37 - 160 16 0-30 <br /> IND means Not Detected <br /> �eporting Limit(RL)=practical Quantitation Limit(PQL)Y Dilution Factor <br />