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Sequoia 680 Chesapeake Drive Redwood CjM CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> WAP Analytical 819 Stnker Avenue,Sutte 8 Sacramento CA 95834 (916) 921 9640 FAX(916)921 0100 <br /> 0 <br /> Touchstone Developments Client Prod ID Chevron 9-2033, 2033-2 Sampled 10/30/96 <br /> P O Box 2554 Sample Descript A28 Received 10/30/96 <br /> Santa Rosa, CA 95405 Matrix SOLID Extracted 10/30/96 <br /> Analysis Method 8015Mod/8020 Analyzed 10/30/96 <br /> Attention Jeff Monroe Lab Number 9610150-12 Reported 1OJ31/96 <br /> OC Batch Number GC10309613TEXEXA <br /> nstrument ID GCHP06 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> mg/Kg mg/Kg <br /> TPPH as Gas 1 0 23 <br /> Methyl t-Butyl Ether 0 025 N D <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Xylenes (Total) 00050 00069 <br /> Chromatogram Pattern <br /> Unidentified HC C9-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 80 <br /> • <br /> analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> ollett <br />'roject Manager Page 12 <br />