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r <br /> Sequoia 680 Chesapeake Dnvc Redwood City,CA 94063 (650) 364 9600 1 A(650)364 9233 <br /> r'V'1 404 N Wiget lane Walnut Creek,CA 94598 (510) 988 9600 rAX(510)988 9673 [[ <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(9t6)921 0100 <br /> Analytical } <br /> }} <br /> } _ Sampled 12/29/97 ;, <br /> Gettler Ryan/G eostrateg i es Client Prol-lD Unocal 4855 18 p ' <br /> 3164 Gold Camp Drive #240 Sample Descript lnf Received 12/29/97 <br /> Rancho Cordova, CA 95670 Matrix AIR <br /> Analysis Method 8015Mod/8020 Analyzed 12/31/97 <br /> Attention Greg Gurss Lab Number 9712G67-01 Reported 011J05198 <br /> I,:}sss i , siii : } r u }e, : i ij}s: }"rn -1s � , „. e i i , <br /> QC Batch Number GC123197BTEX02A ' <br /> Instrument ID GCHP2 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX <br /> Analyte Detection Ltntlt Sample Results <br /> ug/L ug/L <br /> TPPH as Gas 500 850 <br /> Benzene 50 N D <br /> 5 0 N D <br /> Toluene <br /> Ethyl Benzene - 5.0 6 4 <br /> Xylenes (Total) 5 0 88 <br /> >C8 <br /> Chromatogram Pattern - <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 84 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA ANALYTICAL - ELAP #1210 <br /> Gregory Page t <br /> Project Manager <br />