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Sequoia 660 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 /> Blame Tech Services Client Prod ID Shell Stockton/970402-F1 Sampled 04/02/97 <br /> 1680 Rogers Avenue Sample Descript MW-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 9704278-03 Reported 04121197 <br /> QC Batch Number G0041197BTEX18A <br /> Instrument 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 - 66 <br /> Benzene 050 0 81 <br /> Toluene 050 098 <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 1 0 <br /> Chromatogram Pattern <br /> Surrogates Control Limits % % Recovery <br /> Trifluorotoluene 70 130 95 <br /> Analytes reported as N 0 were not present above the stated limit of detection <br /> SEQUOIA YTICAL - ELAP #1210 <br /> P n <br /> Prolec anager Page 6 <br />