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4. 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 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> Blaine Tech Services Client Prol ID Shell Stockton/971009-G1 Sampled 10/09/97 <br /> 1680 Rogers Avenue Sample Descript MW-2 Received 10/10/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 10/20/97 <br /> Attention PranThle Lab Number 9710591-04 Reported 1OJ23197 <br />?C Batch Number GC102097BTEX02A <br /> istrument ID GCHP02 <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 20 <br /> Benzene 0 50 N D <br /> Toluene 0 50 N D <br /> Ethyl Benzene 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> 0 <br /> nalytes reported as N D w r not present above the stated limit of detection <br /> iEQU A NA IC <br /> - EL4P #1210 <br />'e enn r <br />'rolect Manager Page 12 <br />