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Sequoia 680 Chesapeake Drive Redwood Clty CA 94463 (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 /> Blaine Technical Services,Inc Project Shell Oil Co Sampled 1/26/99 <br /> 1680 Rogers Ave Project Number 141 N El Dorado,Stockton/990126-S2 Received 2/2/99 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 2/12/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020M <br /> Se_quoia_Analytical-Petaluma <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-3(continued) P902071-09 Water <br /> Toluene 9020174 2/8/99 2/8/99 0 500 NO ug/l <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 200 323 " <br /> Surrogate a,a,a-Trifluorotoluene of <br /> 650-135 997 % <br /> Surrogate 4-Bromofluorobenzene 650-135 913 11 <br /> MW4 P902071-10 Water <br /> Gasoline 9020174 2/8/99 2/8/99 Soo ND ug/l <br /> Benzene 0 500 ND " <br /> Toluene 0 500 ND " <br /> Ethylbenzene 0 500 ND " <br /> Xylenes(total) 0 500 ND " <br /> Methyl tert-butyl ether 200 3 22 <br /> Surrogate a a,a-Trifluorotoluene 650-135 108 % <br /> Surrogate 4-Bromofluorobenzene " " " 650-135 93 0 " <br /> MW-5 P902071-11 Water <br /> Gasoline 9020174 2/8/99 2/8/99 500 ND ug/l <br /> Benzene 5 00ND <br /> Toluene 500 ND " <br /> Ethylbenzene 500 ND " <br /> Xylenes(total) 500 ND " <br /> Methyl tert-butyl ether 200 1750 " <br /> Surrogate a a a-Trifluorotoluene 650-135 102 % <br /> Surrogate 4-Bromofluoro6enzene "-65-0:'135 94-7 " <br /> Ak <br /> Sequoia Analytical-Petaluma *Refer to end of report for text of notes and defina s <br /> Page 4 of 10 <br />