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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9133 <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 %00 FAX(916)921 0100 <br /> Pacific Environmental Group Client Prol ID 920-119 1A/9-6171, Stockton Sampled 12/23/97 <br /> 2025 Gateway Place, Suite 440 Sample Descrlpt WO-1 Received 12/23/97 <br /> San Jose, CA 95110 Matrix SOLID Extracted 12/26/97 <br /> Analysis Method 8015Mod/8020 Analyzed 01/05/98 <br /> Attention Tim Anensen Lab Number 9712E29-01 Reported 01 JO5198 <br /> QC Batch Number GC122697BTEXEXB <br /> Instrument ID GCHP01 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> mg/Kg m9/K9 <br /> TPPH as Gas - 10 170 <br /> Benzene 0 050 N D <br /> Toluene 0 050 2 6 <br /> Ethyl Benzene - 0 050 1 5 <br /> Xylenes (Total) 0 050 15 <br /> Chromatogram Pattern <br /> - -- <br /> Weathered Gas C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 86 <br /> 4-Bromofluorobenzene 60 140 130 <br /> 10 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Adk <br /> Granlcher <br /> Project Manager Page 5 <br />