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Y <br /> k <br /> Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Wainut Creek CA 94598 (510) 988 9600 FAX (510) 988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/G eo strategies Client Prol ID Chevron 9-6171, Stockton <br /> 6747 Sierra Court Suite G Sample Descript MW-5 Sampled 05/12/96 <br /> Dublin, CA 94568 Matrix LIQUID Received 05/15/96 <br /> Analysis Method 8015Mod/8020 Analyzed 05/20/96 <br /> Attention Deanna Harding Lab Number 9605A58-04 <br /> Reported 05J23j96 <br /> QC Batch Number GC052096BTEX20A - <br /> Instrument ID GCHP20 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit <br /> Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 <br /> Methyl t-Butyl E=ther 2 5 130 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern N D <br /> Discrete Peak <br /> - C7-C8 <br /> Surrogates Control Limits % o <br /> Trifluorotoluene 70 /o Recovery <br /> 4) 130 92 <br /> analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> WGregory <br /> Manager <br /> Page 4 <br />