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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 id 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/970131-Z1 Sampled 01/31/97 <br /> 1680 Rogers Avenue Sample Descript MW-4 Received 02/03/97 <br /> San.lose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/11/97 <br /> Attention Fran Thie Lab Number 9702115-06 Reported 02113197 <br /> QC Batch Number GCO21197BTEX17A <br /> Instrument ID GCHP17 <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 <br /> Benzene 0 50 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 /> Trifluorotoluene 70 130 102 <br /> 0 <br /> Anaiyies reportenN <br /> D were not present above the stated limit of detection <br /> SE7y ' <br /> I LYTICAL - ELAP #1210 <br /> I <br /> gnner Page 6 <br /> rolect Manager <br />