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Sequoia 68o Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 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 Prod ID Shell Stockton/970402-F1 Sampled 04/02/97 <br /> 1680 Rogers Avenue Sample Descript RW-1 Received 04/03/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 04/11/97 <br /> Attention Fran Thie Lab Number 9704278-01 Reported 04121197 <br />)C Batch Number GC041197BTEX18A <br /> nstrument ID GCHP18 <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 25 350 <br /> Benzene 050 - 63 <br /> Toluene 050 64 <br /> Ethyl Benzene 0 50 085 <br /> Xylenes (Total) - 050 44 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Tnfluorotoluene 70 130 92 <br /> 0 <br /> 4nalytes reported as N D were not present above the stated limit of detection <br /> SEQUOIA AN YT CAL - ELAP #1210 <br /> Pe Pen <br /> Project Manager Page 2 <br />