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Sequoia 58o Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 444 N % ipt Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Strtker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> EA Engineering Science&Tech _ Client Prof ID - Exxon 7-3942/83739421307 Sampled 05/11/95 <br /> _ 3468 Mt Diablo Blvd Ste B100 Sample Descript MW-10 Received 05/12/95 <br /> Lafayette, CA 94549 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/18/95 _ <br /> Attention T Faulkner Lab Number 9505983-15 _ - Reported 05/23195 <br /> _ <br /> QC Batch Number-GC051895BTEX17A <br /> Instrument ID 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 6300 <br /> Benzene 10 360 <br /> Toluene 10 750 <br />! Ethyl Benzene 10 -- 230 <br /> Xylenes (Total) 10 _ 480 <br /> Chromatogram Pattern Gas <br />! Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 87 <br /> b <br />! <br /> 1 <br /> 1 <br /> 1 Analytes reported as N D were not present above the stated limit of detection <br /> SEQ ALYTICAL - ELAP #1210 <br /> eggy Penner <br /> Project Manager Page is <br />