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680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> � Analytical 819 Striker Avenue Suite$ Sacramento CA 95$34 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 3ettler Ryan/Geostrategies-s_— Client Prot ID Chevron 9-6171, Stockton! Sampled 05/10/98-� <br /> x747 Sierra Court Suite J Sample Descnpt MW-6 Received G5/11/98 <br />)ublin, CA 94568 Matrix LIQUID _ <br /> Analysis Method 8015Mod/8020 Analyzed 05/15/98 - <br /> knention Deanna Harding _ _ Lab Number 9805584-04 µ-- -_ _Ret orted 06/02/98 ar _ <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> 4nalyte Detection Limit Sample Results <br /> ug/L ug/L <br /> rPPH as Gas 50 250 <br /> Methyl t-Butyl Ether -.- 2.5 - -. .-- - 12 <br /> Benzene 050 N D <br /> Toluene <br /> 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 /> or rotoluene 70 130 110 <br /> analytes reported as N D were not present above the stated lima of detection <br /> SEQUOIA ANALYTICAL - ELAP 41849 <br /> 0 <br /> Protect Manager Page 4 <br /> r� <br />