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y , <br /> Sequoia 0 680 Chesapeake Dnve Redwood City,CA 940 (415) 364-9600 FAX(415) 364-9133 <br /> Z 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(S1o)988 9673 <br /> Analytical 819 Straker Avenue,Suite 8 Sacramento,CA 95834 (916) 911 9600 FAX(916)911 0100 <br /> Gettler Ryan/G eost rateg ies Client Prol ID Unocal 6981,4707 Stockton Sampled 04/23/96 <br /> ' 3164 Gold Camp Drive #240 Sample Descript lnf Received 04/23/96 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 04/25/96 <br /> Attention Greg Gurss Lab Number 9604F58-01 Reported 05J021,96 " <br /> QC Batch Number GC042596BTEX17A <br /> Instrument 1D GCHP17 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with 13TEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 10 1600 <br /> Benzene 010 N D <br /> Toluene 0 10 160 <br /> Ethyl Benzene - - 010 38 <br /> Xylenes (Total) 0 10 180 <br /> Chromatogram Pattern GAS <br /> Surrogates Control Limits% % Recovery <br /> Tnfluorotoluene 70 130 95 <br /> 0 <br /> Analytes reported as N D were nat present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Ogg! <br /> Gregory <br /> Project Manager Page 1 <br />