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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> Q HOUSTON TEXAS 77054 <br /> Cerot <br /> tificate of Analysis No. H9-9910313-25 PHONE(713)660-0901 <br /> BP Oil Company <br /> 295 SW 41st Bldg 13 , Ste N P.O # <br /> Renton, WA 98055 N/A, COC#100735 <br /> ATTN Scott Hooton 10/25/99 <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: 10/06/99 17 40 00 <br /> SAMPLE ID: CB-6-29 HP DATE RECEIVED: 10/09/99 <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 ND 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-Dzchloroethane-d4 50 ug/L 100 80 120 <br /> • Toluene-d8 50 ug/L 100 88 110 <br /> 4-Bromofluorobenzene 50 ug/L 92 86 115 <br /> ANALYZED BY HLW DATE/TIME 10/12/99 18 48 00 <br /> METHOD 8260 Water, Volatile Organics <br /> NOTES : * - Practical Quantitation Limit ND - Not Detected <br /> NA - Not Analyzed <br /> COMMENTS : <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance <br /> SPL California License # 1903 <br />