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Sequoia 680 Chesapeake Dnve Redwood City, CA 94063 (650) 364 960D FAX (650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 819 Stnker Avenue SuLte 8 Sacramento,CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> s <br /> Blaine Tech Services _ Client Proj ID Shell Stockton/971202-1-1 Sampled 12/02/97 <br /> 1680 Rogers Avenue Sample Descnpt MW-8 Received 12/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 12/16/97 <br /> Attention Fran The Lab Number 9712358-10 Reported 12119197 <br /> QC Batch Number GC121697BTEX03A <br /> Instrument ID GCHP3 <br /> Total Purgeable Petroleum Hydrocarbons (TPPH) with BTEX and MTBE <br /> Analyte Detection Limit Sample Results <br /> ug/L. ug/L. <br /> TPPH as Gas 25000 430000 <br /> Methyl t-Butyl Ether 1250 7100 <br /> Benzene 250 .. 3700 <br /> Toluene 250 900 <br /> Ethyl Benzene 250 2600 <br /> Xylenes (Total) 250 9000 <br /> Chromatogram Pattern .. C6-C12 <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 108 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA NA ICAL - ELAP #1210 <br /> Peggy Pe r <br /> 9 <br /> Project Manager Page 30 <br />