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} 14 <br /> • 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-9233 <br /> _Sequoia f = 404 N W1get Lane _ _ Walnut Creek CA 94598 (925)988-9600 FAX(9Z5)988-9673 - - <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 - (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)Z32 9600 FAX(650) 232-9612 <br /> Gettler-Ryan-Dublin Client Project ID Unocal 88#5886, Stockton Sampled Jun 1-2,1999 <br /> 6747 Sierra Court, Suite J Sample Matrix Water Received Jun 2, 1999 <br />_ Dublin, CA 94568 Analysis Method EPA 5030/8015Mod /802_0 _ _Reported— Ju_n 17, 1.9.9_9 <br /> Attention Deanna Hd�rding�—First Sample# 906-0540 -T <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> = AnalyteLimit — — =1.11) �_ T I.D -___=][ D D =_==--=1 D ---�- -I.D <br /> Mg/L 906-0540 906-0541 906-0542 906-0543 906-0544 906-0545 <br /> TB-LB MW-1 MW-2 MW-3 MW-4D MW-4S <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D N D N D <br /> Benzene 0 50 N D N D N D N D N D N D <br /> Toluene 0 50 N D N D N D N D N D N D <br /> Ethyl Benzene 050 N D N D N D N D N D N D <br /> Total Xylenes 050 N D N D N D N D N D N D <br /> MTBE 25 N D 230 2,600 36,000 12 4 0 <br /> Chromatogram Pattern - -- - -- <br /> Duality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 20 10 1 0 1 0 <br /> Date Analyzed 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 6/9/99 <br /> Instrument Identification HP-5 HP-5 HP-5 HP-5 HP-5 HP-5 <br /> i <br /> Surrogate Recovery, % 89 89 81 90 84 85 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, 1271 <br /> 11 <br /> "f/vL- <br /> J Janne Fegley <br /> rolect Manager <br /> 9060540 GET a 1 a <br />