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SfERRA ANALYTICAL <br /> GHH Engineering, Inc. FLAP No.: 2320 <br /> 11.960 Heritage Oak Pl, Suite 2B Date Sampled: 07/29/02 <br /> Auburn, CA 95603 Date Received: 08/01/02 <br /> Date Prepared: 08/01/02 <br /> Date Analyzed: 08/01/02 <br /> Sierra Project No.: 0208-003 Analyst: SM <br /> Client Project ID: USA#5007 Stockton <br /> Sample Matrix: Water Report Date: 08/05/02 <br /> BTEX and Fuel Oxygenates(GC/MS) <br /> Preparation Method- Purge&Trap(EPA Method 5030B <br /> Analysis Method: EPA Method 8260E <br /> Client Sample No.: MW-1 MW-1P MW-2 MW-21? MW-3P <br /> Practical <br /> Quantitation Units <br /> Limit <br /> Sierra Sample No.: 15878 15879 15880 15881 15882 <br /> Analytes <br /> Benzene ND ND ND 23 ND 10 gg/L <br /> 1,2-Dichloroethane 13 74 ND 11 70 10 n/L <br /> 4MDi-Iso-Propyl Ether(DIPE) ND 57 ND 28 67 10 gg/L <br /> Ethyl-t-Butyl Ether(ETRE) ND ND ND ND ND 10 lig/L <br /> thylbenzene ND ND ND ND ND 10 n/L <br /> ethyI-t-Butyl Ether(MTBE) 28 ND ND 200 22 10 Kg/L <br /> ert-Amyl Methyl Ether(TAME ND ND ND ND ND 10 n/L <br /> Tertiary-Butyl Alcohol(TBA) ND ND ND 220 20 50 Ag/L <br /> Toluene ND ND ND ND ND 10 gg/L <br /> rn,p-Xylenes ND ND ND ND ND 10 µg/L <br /> o-Xylene ND ND ND ND ND 10 lig/L <br /> Dilution Factor 1 1 1 1 1 QC Limits <br /> Surrogate Recovery <br /> >.bromofluoromethane 97 101 99 100 99 86- 118 <br /> Toluene-d8 95 97 96 97 97 88 - 110 <br /> 4-Bromofluorobenzene 91 89 92 92 90 86- 115 <br /> 10C Reference No - 020801-15873 <br /> Analytes: LCS LCS QC Spike Spike Dup Spike RPD RPD <br /> %Rec Limits %Ree %Rec. OC Limits QC Limits <br /> 1,1-Dichloroethene 104 80- 120 92 90 50- 150 22 0-30 <br /> nchloroethene 106 80- 120 90 88 71 - 157 22 0.30 <br /> enzene 108 80- 120 86 86 37 - 151 00 0-30 <br /> Toluene 102 80- 120 90 86 47- 130 45 0-30 <br /> Chlorobenzene 108 80- 120 96 92 1 37 - 160 1 4 3 0-30 <br /> ND meaas Not Detected <br /> �pnrhng Urmt(RL)=Practical Quantitation Taunt(PQL)x Dilution Factor <br /> TEX-Betuene,Toluene,Ethylbenzene and Xylenes <br />