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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(5 10)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (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 /> Cambria Client Prol ID Shell 2494 Fremont Sampled 04/30/98 <br /> 270 Perkins Ave Sample Descript S-3-50' Received 05/01/98 <br /> Sonoma, CA 95476 Matrix SOLID Extracted 05/12/98 <br /> Analysis Method 8015Mod/8020 Analyzed 05/12/98 <br /> Attention Mike Murphy Lab Number 9805086-04 Reported 05118198 <br /> OC Batch Number GCO51298BTEXEXA <br /> Instrument ID GCHP18 <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 10 N D <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 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 85 <br /> 4-Bromofluorobenzene 60 140 91 <br /> i <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA A L ICAL - ELAP #1210 <br /> --- <br /> Peggy Penne <br /> Project Manager Page 12 <br />