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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 (9Z5)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-01oo <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services Client Prot ID Chevron 9-4275 Sampled 12/17/98 <br /> 1680 Rogers Avenue Sample Descrlpt MW4 Received 12/18/98 <br /> San .lose CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/30/98 <br /> Attention Christine Lillie Lab Number 9812C63-04 Reported 01/06199 <br /> QC Batch Number GC123098802009A <br /> Instrument 11) HP9 <br />— - - - r Total Purgeable-Hydrocarbons (TPPH) with BTEX and MTBE - - <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 50 N D <br /> Methyl t-Butyl Ether 25 2900 <br /> Benzene 050 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 N D r <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 102 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1271 <br /> Ai <br /> Gr ory <br /> Project Manager Page 4 <br />