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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Weget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue 5urte a Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blame Tech Services Client Proj-ID - Shell Stockton/970709-F1 - Sampled 07/09/97 - <br /> 1680 Rogers Avenue Sample Descnpt RW-1 Received 07/10/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> ' Analysis Method 8015Mod/8020 Analyzed 07/16/97 <br /> Attention Fran Thie _ Lab Number 9707592-01 Reported 07123197 - <br /> QC Batch Number GG071697BTEX21A - - <br /> Instrument ID GCHP21 <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 0 50 N D <br /> Xylenes (Total) 0 50 N D <br /> Chromatogram Pattern <br /> Surrogates Control Limits% % Recovery <br /> Trlfluorotoluene 70 130 105 <br /> 0 <br /> Analytes reported as N D were not present above the stated limit of detection <br /> SEQUOIN LYTICAL - ELAP #1210 <br /> y ner <br /> Project Manager Page <br />