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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 Nl Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)911-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)791-1865 FAX(707)792-0342 <br /> Project Unocal/Tosco Sampled 2/1/99 to 212/99 <br /> ADigital Dr Suite 6 Project Number 227903/Unocal 5098 Received 2/3/99 <br /> vato,CA 94949 Project Manger Mark Dockum Reported 2118199 <br />' Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M/8020NVQuality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> 13alyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Blank(continued) 9020325-BLK1 <br /> rogate a,a,a-Tnfluorotoluene 2/13199 0 300 0168 mg/kg 65 0-135 89 3 <br /> ink <br /> rogate 4-Bromofluorobeazene 0 300 0 280 93 3 <br /> Surrogate 4-Bromofluoroberuene 0 300 0180 65 0-l35 93 3 <br /> 9020325-BLK2 <br /> oltne 2116199 ND mg/kg 0 400 <br /> Benzene ND 000200 <br /> uene ND 000200 <br /> ylbenzene ND 000200 <br /> Xylenes(total) _ ND 000400 <br /> i9rogate a,a a-Trifluorotoluene 0 300 0 312 107 - <br /> ogate 4-Bromofluorobenzene 0 300 0 282 940 <br /> LCS 9020325-BSI <br /> in <br /> e 2/13/99 0200 0188 mg/kg 940 <br /> e 0200 0 188 650-135 940 <br /> e 0200 0 183 915 <br /> tyulbcnzene <br /> ene 0200 0 183 650-135 915 <br /> lbenzene 0200 0181 905 <br /> 0200 0 181 65 0-135 905 <br /> Kylenes(total) 0 600 0 545 908 <br /> Irnes(total) 0 600 0 545 65 0-135 908 <br /> ogate a aa-Trifluorotoluene 0 300 0 30 5 102 <br /> Surrogate a a a-Tr fluorotoluene 0 300 0 306 650-135 101 <br /> 9020325-BS2 <br /> toline 71/16/99 200 190 mg/kg 95 0 <br /> wrrogate 4-Bromofluorobenzene 0 300 0 289 " 963 <br /> nx S lke 9020325-MSI P902158-11 <br /> enzene 2/13/99 0200 0 186 mg/kg <br /> lenzene 1. 0200 ND 0 186 65 0-135 93 0 <br /> ene 0200 0 182 <br /> Rene 0200 ND 0 182 650-135 910 <br /> thylbenzene " 0200 0 179 <br /> f(benzene " 0200 ND 0 179 65 0-135 895 <br /> nes(total) 0 600 0 540 " <br /> enes(total) 0 600 ND 0 540 65 0-135 900 <br /> arrogate a a a-Trrfluorotoluene 0 300 0 304 650-135 101 <br /> lc�gate a a a-Tri luorotoluene 0 300 0 304 101 <br /> Analytical-Petaluma *Refer to end of report for text of notes and definitions <br /> Page 21 of 24 <br />