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Sequoia 690 Chesapeake Drive Redwood City CA 94063 (4 15) 364 9600 FaX f415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 9S8 9673 <br /> JJW- \ Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX {916} 921 0100 <br /> EA Engineering Science &Tech Client Prol ID Exxon 7-3942 / 8373942 1307 Sampled 02/13/96 <br /> 3468 Mt Diablo Blvd Ste 8100 Sample Descnpt MW9 Received 02/14/96 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/20/96 <br /> Attention Tracy Faulkner Lab Number 9602A05-15 Reported_02j23/96 <br /> QC Batch Number GCO22096BTEX17A <br /> Instrument lD GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> TPPH as Gas 1000 4400 <br /> Benzene 10 890 <br /> Toluene 10 N D <br /> Ethyl Benzene 10 110 <br /> Xylenes (Total) 10 220 <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br />' Trifluorotoluene 70 130 88 <br /> 1 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> I <br /> vin Follett <br /> rolect Manager Page 15 <br />