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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)3649600 FAX(650)3649233 <br /> 404 N W1get Lane Walnut Creek CA 94598 (925)988-9600 FAX(92S)988-%73 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)92 1-0 100 <br /> 1455 MDowe <br /> 94954 (707)792- 865 FAX(707)792-0342 <br /> Analytical 1551 IndCus rialll oadd North Ste D SaBlvnaCarlosa �CA 94070-4111 (650)232-1 <br /> 9600 FAX(650)Z32-9612 <br /> SECOR International Project ARCO 2093,Tracy,CA Sampled 3/23/99 <br /> 9912 Business Park Drive,Ste 100 Project Number N/A Received 3/23/99 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 4/5/99 <br /> Total Purgeable Hydrocarbons(C6-C12) and BTEX to Air by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> Influent S9-Q3311-01 <br /> Au <br /> Purgeable Hydrocarbons 9030384 3126/99 4/1/99 240 495 ppmv 1 <br /> Benzene 00160 ND " <br /> Toluene 00130 0 253 " <br /> Ethylbenzene 00120 0 135 <br /> Xylenes(total) 00120 2 56 <br /> Methyl tent-butyl ether 0 140 ND " <br /> Surrogate a a a-Trffluorotoluene 600-140 129 <br /> Effluent S903311-02 Air <br /> Purgeable Hydrocarbons 9030384 3/26/99 4/1/99 240 9 56 ppmv 1 <br /> Benzene 00160 ND <br /> Toluene 00130 00180 <br /> Ethylbenxene 00120 00184 <br /> lenes(total) 00120 0 615 <br /> hyI tett-butyl ether 0 140 ND <br /> rrogate a a a-Trifluorotoluene 600-140 106 <br /> OU-01ta Analytical -Sacramento *Refer to end of report for text of motes and definitions <br /> Sandra R Hanson,Client Services Representative Page 3 of 6 <br />