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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE a <br /> 0 HOUSTON TEXAS 77054 <br /> ertificate of Analysis No. H9-9910313-07 PHONE(713)6600901 <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 09 29 00 <br /> SAMPLE ID: CB-1-16 HP DATE RECEIVED: 10/09/99 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS PQL* UNITS <br /> Benzene 27 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 38000 5000 ug/L <br /> Tert-Amyl Methyl ether 160 10 ug/L <br /> SURROGATES AMOUNT LOWER UPPER <br /> SPIRED RECOVERY LIMIT LIMIT <br /> 1, 2-Dichloroethane-d4 50 ug/L 98 80 120 - <br /> Toluene-d8 50 ug/L 104 88 110 <br /> 4-Bromofluorobenzene 50 ug/L 104 86 115• <br /> ANALYZED BY HLW DATE/TIME: 10/12/99 15 43 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 />