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' Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 363-9233 <br /> �V^ Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> w EA Engineering Science&Tech '- Client Prod ID -` Exxon 7-3942/51539421307-µ µSampled 04/18/96- <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descript P2 Received 04/19/96 = <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/24/96 - <br /> '- Attention Marla Guensler Lab Number 9604E23-23 Reported_05/10/96 - <br /> ,,_ _�- •W••_ u <br /> QC Batch Number GC042496BTEX17A - <br /> Instrument ID GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br />' TPPH as Gas .. .. .... . 250 .. 1600 <br /> Methyl t-Butyl Ether 12 N D <br /> Benzene .. .. .. 2 5 . .. .. .. .. 5.5 <br /> Toluene 25 N D <br />' Ethyl Benzene :: .. 2 5 •• .-- 74 <br /> Xylenes (Total) 2.5 39 <br /> Chromatogram Pattern .. .. Gas <br />' Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 93 <br /> t <br /> 1 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ISEO A NALYTICAL ELAP #1210 <br /> Follett <br /> Protect Manager Page 4 <br />