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km <br /> 1"I` AS i <br /> NAM <br /> 'a 11WIR50awwN MEMO <br /> 42 <br /> SEP 211989 <br /> SUPERIOR ANALYTICAL LASOAATORY INC. <br /> 1385 FAIRFAx ST., STE D • SAN FRANCISCO, CA 94124 • PHONE (415) 6 /SERVICES <br /> C E R T I F I 0 A T E O F A N A L Y S I S <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 8015 <br /> Gasoline by Purge and Trap: EPA Method 5030 <br /> ANALYSIS FOR BENZENE, TOLUENE, ETHYL BENZENE & XYLENES <br /> by EPA SW-846 Methods 5030 and 8020 <br /> Page 2 of 2 <br /> QA/QC INFORMATION <br /> SET: 50724 <br /> NA = ANALYSIS NOT REQUESTED <br /> ND =. ANALYTE NOT DETECTED ABOVE QUANTITATION LIMIT <br /> ug/L = part per billion (ppb) <br /> 8015/5030 Total Purgable Petroleum Hydrocarbons <br /> Minimum Quantitation Limit for Gasoline 'in Water: 500 ug/L. <br /> QA/QC SUMMARY: <br /> Daily Standards run at 200 mg/L; RPD Gasoline 1 <br /> MS/MSD: Average Gasoline Recovery =105 :Duplicate RPD=10. <br /> E 8020/BTXE: <br /> Mimimum Quantitation Limit in Water: 0.50 ug/L. <br /> QA/QC SUMMARY: <br /> Daily Standard run at 20 ug/L: RPD < 15. <br /> MS/MSD: Average Recovery = 105%. Duplicate RPD =11 . <br /> Average Surrogate Recovery = 79%. <br /> Les Partridge, Ph.D. <br /> bora ory Mana <br /> OUTSTANDING QUALITYAND SERVICE <br />