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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 119 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Gettler Ryan/Geostrategies Client Prof ID Unocal 6981, 4855 19 Sampled 09/28/97 „ <br /> 3164 Gold Camp Drive #240 Sample Descript INFL Received 09/29/97 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 10/01/97 <br /> Attention Steve Carter Lab Number 9709G57-01 Reported 1OJ03/97 ' <br /> QC Batch Number GC1 001 97BTEX03A <br /> Instrument ID GCHP03 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Limit Sample Results <br /> ug/L ug/L. <br /> TPPH as Gas 100 1500 <br /> Benzene 1 0 N D <br /> Toluene 1 0 N D <br /> Ethyl Benzene 1 0 18 <br /> Xylenes (Total) 1 0 170 <br /> Chromatogram Pattern <br /> Weathered Gas C8-C12 <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 113 <br /> i• <br /> Analytes reported as N D were not present above the stated Amit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> regory <br /> ct Manager Page 1 <br />