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■ \ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9,500 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 938 9600 FAX(510) 988 %73 <br /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering g ng Science &Tech Client Prol ID Exxon 7-3942 / 8373942 1307 Sampled 02/13/96 <br /> 3468 Mt Diablo Blvd Ste B100 Sample Descrlpt P2 Received 02/14/96 <br />' Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/16/96 <br /> Attention Tracy Faulkner - -Lab Number 9602AQ5-06 _ Reported 02f 23J96 <br />' QC Batch Number GCO21696BTEX20A - - - - <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas - 250 - 1700 <br /> Benzene 2.5 63 <br /> Toluene 25 N D <br /> Ethyl Benzene 2.5 77 <br /> Xylenes (Total) 2.5 43 <br />' Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trrfluorotoluene 70 130 127 <br /> i <br /> I <br /> I <br /> I <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br /> ISEQUOIA ANALYTICAL - ELAP 41210 <br /> I <br /> Win Follett <br /> ect Manager Page 6 <br />