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T HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> Certificate of Analysis No. H9-991041.8-24 PHONE(713)fi800901 <br /> BP Oil Company P O # <br /> 295 SW 41st Bldg 13 , Ste N <br /> Renton, WA 98055 J131881 , COC#100527 <br /> ATTN Scott Hooton 11/08/99 <br /> PROJECT: ##11193 , 3202 W Hammer Lane PROJECT NO: 852-1530 <br /> SITE: Stockton CA MATRIX: WATER <br /> SAMPLED BY: Cambria Env Technology DATE SAMPLED: 10/08/99 12 28 00 <br /> SAMPLE ID: CB-5-29 HP DATE RECEIVED: 10/12/99 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS PQL* UNITS <br /> Benzene ND 5 ug/L <br /> Ethylbenzene ND 5 ug/L <br /> Toluene ND 5 ug/L <br /> Xylenes (total) ND 5 ug/L <br /> Methyl t-Butyl Ether 17 10 ug/L <br /> Tert-Amyl Methyl ether ND 10 ug/L <br /> SURROGATES AMOUNT LOWER UPPER <br /> SPIKED RECOVERY LIMIT LIMIT <br /> 1, 2-Dichloroethane-d4 50 ug/L 92 80 120 <br /> Toluene-d8 50 ug/L 98 88 110 <br /> 4-Bromofluorobenzene 50 ug/L 88 86 115 <br /> ANALYZED BY HLW DATE/TIME 10/15/99 17 52 00 <br /> METHOD 8260 Water, Volatile Organics <br /> NOTES . * - Practical Quantitation Limit ND - Not Detected <br /> NA - Not Analyzed <br /> COMMENTS : <br /> • <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance <br /> SPL California License # 1903 <br />