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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)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 /> SECOR International Project ARCO 2093,Tracy,CA Sampled 2/2/99 <br /> 9912 Bu51neS5 Park Drive,Ste 100 Project Number N/A Received 213199 <br /> Sacramento,CA 95827 Project Manager Rusty Benkosky Reported 2/17/99 <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 =Nots- <br /> Influent <br /> S902045-01 Air <br /> Purgeable Hydrocarbons 9020043 2/3/99 2/3199 240 169 ppmv 1 <br /> Benzene 00160 0 405 <br /> Toluene 00130 00380 " <br /> Ethylbenzene 00120 00278 ' <br /> Xylenes(total) 00120 00688 " <br /> Methyl tert-butyl ether 0 140 ND <br /> Surrogate a a a-Triuorotoluene 600-140 995 <br /> Effluent 5902045-02 Air <br /> Purgeable Hydrocarbons 9020043 2/3/99 2/3/99 240 ND ppmv <br /> Benzene " 1. 00160 00180 <br /> Toluene 00130 ND <br /> Ethylbenzene 00120 ND " <br /> lenes(total) <br /> 00120 00380 " <br /> yl tert-butyl ether 0 140 ND <br /> rrogate a a a-Trtfluorotoluene 600-140 103 <br /> Wo.,Analytical-Sacramento "Refer to end of report for text of notes and definitions <br /> Sandra R Manson,Client Services Representative page 3 of 6 <br />