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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77054 <br /> e tificate of Analysis No. H9-9809326-10 PHONE (713)660-0801 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P.O.# <br /> Renton, WA 98055 H405058 , COC#095813 <br /> ATTN: Scott Hooton 09/17/98 <br /> PROJECT: #11195 , PROJECT NO: 10-151-9-3 <br /> SITE: Lathrop, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 09/03/98 <br /> SAMPLE ID: S-10 DATE RECEIVED: 09/09/98 <br /> ANALYTICAL DATA <br /> PARAMETER RESULTS PQL* UNITS <br /> Methyl t-Butyl Ether 82000 10000 ug/L <br /> tert-Amyl Methyl Ether 710 10 ug/L <br /> t-Butyl Alcohol ND 500 ug/L <br /> Ethyl t-Butyl Ether ND 10 ug/L <br /> Di-Isopropyl Ether ND 10 ug/L <br /> SURROGATES AMOUNT % LOWER UPPER <br /> SPIRED RECOVERY LIMIT LIMIT <br /> 1 , 2-Dichloroethane-d4 50 ug/L 96 76 114 <br /> Toluene-d8 50 ug/L 118 << 88 110 <br /> 4-Bromofluorobenzene 50 ug/L 90 86 115 <br /> ANALYZED BY : JC DATE/TIME: 09/11/98 05: 50 : 00 <br /> METHOD: 8260 Water, Volatile Organics <br /> NOTES : * - Practical Quantitation Limit ND - Not Detected <br /> NA - Not Analyzed <br /> - Recovery outside of control limits . <br /> COMMENTS : <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance. <br /> SPL California License # 1903 <br />