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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 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 %00 FAX(916)921-0100 <br /> Blaine Tech Services Client Prol ID Shell Stockton/971224-D1 Sampled 12/24/97 <br /> 1680 Rogers Avenue Sample Descript EB Received 12/24/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method i8015Mod/8020 Analyzed -01/07/98— <br /> Attention <br /> 07/98Attention Fran Th1e Lab Number 9712F98-04 Reported 01 J13198 <br /> OC Batch Number GCO10798STEX02A <br /> Instrument ID GCHP2 <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 50 N D <br /> Methyl t-Butyl Ether 25 N D <br /> Benzene 050 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trlfluorotoluene 70 130 90 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOI A LYT#CAL - ELAP #1210 <br /> Peggy Pe r <br /> Project Manager Page 10 <br />