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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 <br /> 404 N Wiget Lane Walnut Creek CA 94598 FAX(650}368 9233 <br /> 9673 <br /> Analytical 819 Striker Avenue Stnte 8 Sacramento, CA 95834 (9 f G(5f6) 988 9600 FAX(51 988} 921 9600 FAX{9166) 0100)921 0100 <br /> Gettle'r Ryan/Geostrate fes ry - - <br /> g Client Prof 1D Chevron 9-1848, Manteca Sampled 08/25/97 <br /> ,;3i64 Gold Camp Drive #240 Sample Descrrpt B2 <br /> ;i Rancho Cordova, CA 95670Matrix LIQUID Received 08/30/97 <br /> �''Attention Greg Gurss Analysts Method 8015Mod/8020 <br /> " <br /> r" ,,,, 9 Lab Number 9709993-10 Analyzed 09/19/97 <br /> _, GReported 1 OJ27/97 <br /> QC Batch Number C091997BTEX03A '' _ ' <br /> Instrument ID GCHP03 <br /> Total Purgeabie Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte <br /> Detection Limit Sample Results <br /> TPPH as Gas ug/L ug/L <br /> Benzene 50 N D <br /> Toluene 050 N D <br /> Ethyl Benzene 050 ND <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern 050 N D <br /> Surrogates <br /> Trlfluorotoluene Control Limits % <br /> 70 130 % Recovery <br /> 89 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> 0 <br /> Project Mana0ger <br /> Page 70 <br />