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k 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(510)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 E Fremont Sampled 04/29/98 <br /> 270 Perkins Ave Sample Descript S-2-50 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 Joe Neely Lab Number 9805091-01 Reported 05118198 „ <br /> QC Batch Number GC051298BTEXEXA <br /> Instrument ID GCHP01 <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 70 130 101 <br /> 4-Bromofluorobenzene 60 140 89 <br /> • <br /> Analytes reported as N D wer not present above the stated limit of detection <br /> SEQUOIA A AL - ELAP #1210 - <br /> eggy Pen e • <br /> Project Man ger Page 3 <br />