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HOUSTON LABORATORY <br /> 4880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77054 ri r <br /> /..:..:: <br /> r lficate of Analysis No. H9-9805371-04 PHONE (713) 660-0901 <br /> BP Oil Company <br /> 295 SW 41st St, Bldg 13 , Ste N P .O. # __ <br /> Renton, WA 98055 H177183 , COC#098772 <br /> ATTN: Scott Hooton 05/19/98 ;7: <br /> PROJECT: #11195, N/A PROJECT NO: 10-151-6-3 <br /> SITE: Lathrop, CA MATRIX: WATER <br /> SAMPLED BY: Alisto Engineering DATE SAMPLED: 05/07/98 is <br /> SAMPLE ID: S-4 DATE RECEIVED: 05/08/98 <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 93000 5000 ug/L x= <br /> t-Butyl Alcohol ND 500 ug/L _ <br /> Di-Isopropyl Ether ND 10 ug/L <br /> tert-Amyl Methyl Ether 470 10 ug/L <br /> Ethyl t-But 1 Ether ND 10 u L <br /> Y Y g/ <br /> SURROGATES AMOUNT % LOWER UPPER <br /> SPIKED RECOVERY LIMIT LIMIT <br /> 1, 2-Dichloroethane-d4 50 ug/L 92 76 114 <br /> Toluene-d8 50 ug/L 100 88 110 <br /> 4-Bromofluorobenzene 50 ug/L 104 86 115 ri <br /> ANALYZED BY: JC DATE/TIME : 05/14/98 10 : 18 : 00 <br /> METHOD : 8260 Water, Volatile Organics <br /> NOTES : * - Practical Quantitation Limit ND - Not Detected <br /> NA - Not Analyzed <br /> COMMENTS : <br /> _f <br /> :i <br /> -1 <br /> QUALITY ASSURANCE: These analyses are performed in accordance <br /> with EPA guidelines for quality assurance . <br /> SPL California License # 1903 <br /> �f <br />