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Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)988 9673 <br /> Analytical 819 Striker Avenue,Suite a Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> i <br /> Gettler Ryan/Geostrategles Client Prol-IDChevron 9-6171, Stockton - Sampled 05/30/95 <br /> 6747 Sierra Court Suite G Sample Descrlpt MW-2 Received 05/31/95 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 06/05/95 <br /> Attention Argy Leyton_ Lab Number 9505L04-07 Reported 06J07195 - <br /> QC Batch NumberµGC060595BTEX17A <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 100 480 <br /> Benzene .. .. 1 0 2 4 <br /> Toluene 1 0 N D <br /> Ethyl Benzene 1 0 N D <br /> Xylenes (Total) 1 0 N D <br /> Chromatogram Pattern <br /> Discrete Peaks .. C6-C8 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 90 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP 01210 <br /> Ask /J//�- <br /> MI Gregory <br /> Project Manager page 7 <br />