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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 <br /> (510) 988 9600 FAX(S l0)988 9673 <br /> Analytical 819Strike,Avcnuc,Swte 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan%Geostrategies " Client Prof ID Chevron 9-6171, Stockton Sampled 02/24/97 <br /> 6747 Sierra Court Suite G Sample Descript MW-4 Received 02/25/97 <br />"^ Dublin, CA 94568 Matrix LIQUID <br />- Analysis Method 8015Mod/8020 Analyzed 02/28/97 - <br />;; Attention Deanna Harding " Lab Number 9702D34-07 " _Reported 03J05197_ - <br /> bC Batch Number GCO22897BTEX06A - <br /> Instrument ID GCHP6 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas .. .. 50300 <br /> Methyl t-Butyl Ether 25 - -• N D <br /> Benzene 0 501 0 <br /> Toluene .. 050 -- -- - - N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) N D <br /> Chromatogram 050 Pattern <br /> Unidentified HC <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 74 <br /> i <br />,nalytes reported as N D were not present above the stated limit of detection <br /> iEQUOIA ANALYTICAL - ELAP #1210 <br /> r!r a ory <br />'r Manager <br /> Page 7 <br />