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Sequoia 1455 McDowell Blvd North,Ste D <br /> Petaluma,CA 94954 <br /> 41) (707) 792-1865 <br /> Analytical <br /> FAX(707)792-0342 <br /> ERI Project TOSCO Sampled 5/12199 <br /> 73 Digital Dr Suite 100 Project Number Tosco 76#t5886/2055047T7 Received 5/13/99 <br /> Novato,CA 94949 Project Manager Keith Romstad Reported 5/25199 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020NVQuahty Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal a Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9050345 Date Prepared 5/1,3/99 Extraction Method EPA 5030 waters <br /> Blank 9050345-BLKI <br /> Gasoline 5/13/99 ND ug/I Soo <br /> Benzene ND 0 500 <br /> Toluene ND 0.500 <br /> EthyIbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> Surrogate a a,a-Trfluorotoluene 300 312 N 630-135 104 <br /> Surrogate 4-Bromofluorobenzene 300 298 N 650-135 993 <br /> LCS 9050345-BS1 <br /> Benzene 5113/99 100 101 UO 650-135 101 <br /> Toluene 100 992 650-135 992 <br /> Ethylbenzene 100 955 650-135 955 <br /> Xylenes(total) 300 315 650-135 105 <br /> rrogate a,a,a-Trifluorotoluene 300 311 650-135 104 <br /> Matnx Spike 9050345-MSI P905039-02 <br /> Benzene 5/13/99 100 ND 100 119/1 650-135 100 <br /> Toluene 100 193 100 650-135 981 <br /> Ethylbenzene 100 ND 95 2 650-135 952 <br /> Xylenes(total) h 300 107 314 h650-135 104 <br /> Surrogate a a a-Trifluorotoluene 300 315 0650-135 105 <br /> Matnx Spike Duo 9050345-MSD1 P905039-02 <br /> Benzene 5113/99 100 ND 936 ug/I 650-135 936 200 661 <br /> Toluene 100 1 93 939 650-135 920 200 642 <br /> Ethylbenzene 100 ND 889 650-135 889 200 684 <br /> Xylenes(total) 300 107 293 650-135 97.3 200 666 <br /> Surrogate a,a,a-Tnfluorotoluene 300 285 650-135 950 <br /> Batch: 9050346 Date Prepared 5/13/99 Extraction Method EPA 5030 waters <br /> Blank 9050346-BLKI <br /> Gasoline 5/13/99 ND ugll 50.0 <br /> Benzene ND 0.500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0 500 <br /> Surrogate a,a,a-Tr fluorotoluene 300 285 650-135 950 <br /> Surrogate 4-Bromofluorobenzene 300 287 650-135 957 <br /> Am <br /> equoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 4 of 7 <br />