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Sequoia 1455 McDowell Blvd North,Ste D <br /> ` 1 Petaluma CA 94954 <br /> (707) 79Z-1865 <br /> Analytical FAX(707) '792-0342 <br /> ERI Project UnocaVFosco Sampled 5/2I/99 <br /> 73 Digital Dr Suite 100 Project Number 227903UN4 Received 5124/99 <br /> Novato,CA 94949 Project Manager Glenn Mattuecci Reported 5/30/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M1$020M/QuaHty Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Lieut Recov RPD RPD <br /> Anal a <br /> Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Watch 9050807 Date Prepared 5/27/99 Extraction Method EPA 5030 soils <br /> lank 9050807-BLKI <br /> Gasoline 5/27/99 ND mg/kg 0 800 <br /> enzene 1' ND 000400 <br /> oluene ND 000400 <br /> thylbenzene ND 000400 <br /> Xylenes(total) ND 000800 <br /> F <br /> ethyl tert-butyl ether ND 00200 <br /> rrogate a,a a-Trifluorotoluene 0 300 0 278 650-135 927 <br /> Surrogate 4-Bromofluorobenzene 0 300 0 260 650-135 867 <br /> [CS 9050807-BS1 <br /> en2ene 5/27/99 0200 0209 mg/kg 650-135 105 <br /> Toluene 0200 0202 " 650-135 101 <br /> thylbenzene 0200 0 199 650-135 995 <br /> lenes(tots!) " 0 600 0 597 650-135 995 <br /> ogate a a,a-Triuorotoluene 0 300 0 313 650-135 104 <br /> atnx Spike 9050807-MS1 P905595-01 <br /> enzene 5127/99 0200 ND 0 223 mg/kg 650-135 112 <br /> Toluene 0200 ND 0206 " 650-135 103 <br /> thylbenzene 0200 ND 0 187 650-135 935 <br /> ylenes(total) to 0 600 ND 0 555 " 650-135 925 <br /> arrogate a,a,a-Trtuorotoluene 10 0 300 0 312 " 650-135 104 <br /> atrlx Spike Dup 9050807-MSD/ P905595-01 <br /> enzene 5/27/99 0200 ND 0 223 mg/kg 650-135 112 200 0 <br /> Toluene 0 200 ND 0208 650-135 104 200 0 966 <br /> tthylbenzene 0200 ND 0 192 650-135 960 200 2 64 <br /> ylenes(total) 0 600 ND_ 0 570 650-135 950 200 267 _ <br /> 08urrogate a,a,a-Tr fruorotoluene 0 300 0 310 650-135 103 <br /> uoia Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 3 of 5 <br />