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■ , Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAY (4t5) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)931 0100 <br /> 1 <br />' EA Engineering Science &Tech Client Prof ID <br /> Exxon 7-3942 / 8373942 1307 Sampled 02/73/96 <br /> 3468 Mt Diablo Blvd Ste 6100 Sample Descnpt MW1 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 9602A05-08 Reported 02123196 <br />' QC Batch Number GCO21696BTEX20A _ - _ -- µ -- --- ---------- ------ µ <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> t Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 190 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethvl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br />' Chromatogram Pattern <br /> Unidentified HC <C8 <br />' Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 105 <br /> 1 <br /> I <br /> Analytes reported as N D were not present above the stated limit of detection <br />' SEQUOIA ANALYTICAL - ELAP #1210 <br /> vin Follett <br /> olect Manager Page 8 <br />