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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N 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)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Project Unocal/Tosco Sampled 2/1/99 to 2/7./99 <br /> fDgital Dr Suite 6 Project Number 227903/Unocal 5098 Received 2/3/99 <br /> to,CA 94949 Pro ect Mana er Mark Dockum Reported 2118/99 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015M18020M/Quality Control <br /> Sequoia Analytical-Petaluma <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> alyte Analyzed Level Result Result Units Recov Limits % Limit % Nates* <br /> Matrix Spike Dup(continued) 9020307-MSD1 P902038-02 <br /> luene 7/12/99 100 194 12 0 mg/kg 101 196 <br /> ylbenzene 100 1 72 114 968 103 <br /> Xylencs(total) 300 694 365 98.5 447 <br /> Itrogate a a,a-Trifluorotoluene 300 294 980 <br /> ch 9020316 Date Prepared 2/12/99 Extraction Method EPA 5030 soils <br /> Blank iftsoline 2/12/99 ND mg/kg 0 400 <br /> nzene ND 000200 <br /> Toluene ND 000200 <br /> Cr,ylbenzene ND 0002DD <br /> nes(total) ND 000400gale a aa-Tr fTuorotoluene " 0 300 0171 903 <br /> Surrogate 4-Bromofluorobenzene 0 300 0 277 923 <br /> 9020316-BSI <br /> hine 7112199 200 203 mg/kg 101 <br /> S rrogale 4-Bromofluorobenzene 0 300 0 278 92 7 <br /> trix Spike 9020316-MSI P902I06-12 <br /> Gasoline 2/12/99 200 ND 197 mg/kg 985 <br /> latrogate 4-Bromofluorobenzene 0 300 0 264 880 <br /> nx Spike Dun 9020316-MSDI P902106-12 <br /> Gasoline 2/12/99 200 ND 191 mg/kg 95 5 3 09 <br /> V <br /> te 4-Bromofluorobenzene 0300 0258 <br /> 860 <br /> Batch 9020325 Date Prepared „2/13199 Extraction Method EPA 5030 soils <br /> nk 9020325-BLKI <br /> ohne 2/13199 ND mg/kg 0 400 <br /> asoline ND 0 400 <br /> Benzene ND 000200 <br /> luene ND 000200 <br /> ene ND 000200 <br /> Toluene ND 000200 <br /> ylbenzene ND 000200 <br /> ylbenzene ND 000200 <br /> enes(total) ND 000400 <br /> Xylenes(total) ND 000400 <br /> thyl tert-butyl ether _ _ ND __ 00100 _ <br /> rogate-aa a-Tnfluorololuene 0 300 - 0 268 �- 893 <br /> Flia Analytical-Petaluma *Refer to end of report for lest of noses and definitions <br /> 1 Page 20 of 24 <br />