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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916)9Z1-9600 FAX(9t6)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> aEX- <br /> settler Ryan/Geostrategles Client Proj ID Chevron 9-6171, Stockton Sampled 05/10/98 <br /> 5747 Sierra Court Suite J Sample Descri t MW-2 Received 05/11/98 <br /> Dublin, CA 94568 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 05/15/98 <br /> Attention Deanna Harding _____Lab Number 980558405 _ - — _ Reported 06/02/98 _, <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Resu3ts <br /> ug/L ug/L <br /> TPPH as Gas .. 50 .. .. 1700 <br /> Methyl t-Butyl Ether .. .. 25 .. .. 33 <br /> Benzene .. 050 .. . 062 <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Unidentified HC C6-C12 <br /> Surrogates Control Limits % % Recovery <br /> orotoluene 70 130 110 <br /> i <br /> knaiytes reported as N D were not present above the stated limit of detectUon <br /> SEQUOIA ANALYTICAL - ELAP #1849 <br /> Project M Manager Page 5 <br />