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Sequoia 1455 McDowell Blvd North,Ste D 4D Petaluma,CA 94954 (707)792-1865 Analytical FAX(707)792-0342 Cambria Environmental Project Equiva 10d Sampled 12/13/99 to 12/14/99 270 Perkins St Project Number 2494 Fremont St,Stockton,Ca Received 12/16/99 Sonoma,CA 95476 —Project Manager Bob Perlowski Reported 1/4/00 Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015MI8020M Sequoia Analytical-Petaluma Batch Date Date Surrogate Reporting Analyte Number Prepared Analyzed Luruts Limit Result Units Notes* SB-4-65 0 P912444-08 Soil Gasoline 9120485 12/20/99 12/20/99 200 258 mg/kg Benzene 00100 0 124 " Toluene 00100 00417 " Ethylbenzene 00100 00496 " Xylenes(total) 00100 0 129 " Methyl tert-butyl ether 0 100 ND " Surrogate a a a-Trfluorotoluene 650-135 810 % Surrogate 4-Bromofluorobenzene 650-135 89 7 " SB-4-70 0 P912444-09 Soil Gasoline 9120485 12/20/99 12/20/99 5 00 ND mg/kg Benzene 00250 0 212 " Toluene 00250 00483 " /benzene 00250 ND es(total) 00250 00508 " hyl tert-butyl ether 0 250 ND " Surrogate a a a-Tris luorotoluene 650-135 910 % Surrogate 4-Bromofluorobenzene " " " 650-135 960 " SB-4-75 0 P912444-10 Soil Gasoline 9120485 12/20/99 12/20/99 100 ND mg/kg Benzene 000500 00186 " Toluene 000500 00107 " Ethylbenzene 000500 000768 " Xylenes(total) 000500 00358 " Methyl tent-butyl ether 00500 ND " Surrogate a a,a-Trifluorotoluene 650-135 88 7 Surrogate 4-Bromofluorobenzene " " " 650-135 895 If SB-4-80 0 P912444-11 Soil Gasoline 9120485 12/20/99 12/20/99 100 ND mg/kg Benzene 000500 ND " Toluene 000500 000973 " Ethylbenzene 000500 000836 " Xylenes(total) 000500 00292 " Methyl tert-butyl ether 00500 ND " Surrogate a aa-Trifluorotoluene 650-135 902 % Surrogate 4-Bromofluorobenzene 650-135 87-5 " SB-4-85 0 P912444-12 Sol] Gasoline 9120485 12/20/99 12/20/99 100 ND mg/kg Ah oia Analytical-Petaluma *Refer to end ofreport for text ofnotes and definitions I Page 2of13