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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (41.5) 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 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> = Blaine Tech Services _ - Client Prof ID Chevron 9-1918/970207-H1 Sampled 02/10/97 <br /> s 1680 Rogers Avenue Sample Descript MW-13 Received 02/10/97 <br /> San Jose, CA 95112 Matrix LIQUID <br /> Analysis Method 8015Mod/8020 Analyzed 02/13/97 <br /> Attention Fran Thie Lab Number 9702482-06 Reported 02J1 8J97 <br /> QC Batch Number GCO21397BTEX07A -- - <br /> Instrument ID GCHP07 <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 85 <br /> Methyl t-Butyl Ether 25 - 28 <br /> Benzene 0 50 1 0 <br /> Toluene 050 N D j <br /> Ethyl Benzene 050 N D <br /> Xylenes (Total) 050 N D <br /> Chromatogram Pattern Gas <br /> Surrogates Control Limits% % Recovery <br /> Trifluorotoluene 70 130 87 <br /> • <br /> Analytes reported N were not present above the stated limit of detection <br /> SEQ I A ALYTICAL - ELAP #1210 <br /> 2 <br /> wle ner <br /> Project Manager Page 6 <br />