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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> amink- ) 404 N Wiget Lane Walnut Creek,CA 94598 (510)988-9600 FAX(510)988-96'13 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> ti Analytical 1455 McDowell Blvd North 5te D Petaluma,CA 94954 (707) 792.-1865 FAX(707)792-0342 <br /> µCambria Client Prol ID Shell 2494 Fremont Sampled 04/30/98 <br /> 270 Perkins Ave Sample Descript S-1-55' 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 9805086-01 Reported 05J18j98 <br /> QC Batch Number GC051298BTEXEXA <br /> Instrument ID GCHP16 <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 100 1800 <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 089 <br /> Toluene 050 23 <br /> Ethyl Benzene 050 15 <br /> Xylenes (Total) 050 87 <br /> Chromatogram Pattern C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 168 Q <br /> 4-Bromofluorobenzene 60 140 23 Q <br /> • <br /> Analytes reported a D were not present above the stated limit of detection <br /> SEQ A ALYTICAL - ELAP #1210 <br /> 61 <br /> P enner <br /> Pro a Manager Page 3 <br />