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Sequoia 680 `sapeake 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 /> Q�p,1i <br /> Pacific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 10/6198 <br /> 1 1315 Sunrise Gold Circle St M Project Number 910-017 1 A3°��° Received 10/7/98 <br /> '7" <br /> Rancho Cordova,CA 95742 Project Manager Mike Mitchener Reported 10/20/98 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample Q Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />' Batch. 8100157 Date Prepared. 10/9/98 Extraction Method, EPA 5030B(MeOHI <br /> 8100157-BLKI <br /> 'Pnfgeable Hydrocarbons 10/9/98 ND mg/kg 1 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br />' Methyl tert-butyl ether ND 00500 <br /> Surrogate a s a-Trifluorotoluene 0200 0 192 600-140 960 <br />' LCS 8100157-BSI <br /> Benzene 10/9198 0200 0 210 mg/kg 700-130 105 <br /> Toluene 0200 0201 700-130 101 <br /> Ethylbenzene 0200 0 198 700-130 990 <br /> lenes(total) 0 600 0 588 700-130 980 <br /> (ethyl tert-butyl ether 0200 0 190 700-130 95 Q <br /> Surrogate a a a-Trifluorotoluene 0200 0 188 600-140 94 0 <br /> Matrix,Spike 8100157-MS1 5810016-01 <br /> Benzene 10/9/98 0200 ND 0 177 mg/kg 600-140 885 <br /> Toluene 0200 ND 0 172 600-140 860 <br /> Ethylbenzene 0200 ND 0 172 600-140 86 0 <br /> Xylenes(total) 0 600 ND 0 515 600-140 85 8 <br /> Methyl tent-butyl ether 0200 ND 0 188 600-140 940 <br /> Surrogate a a a-TriJluorotoluene 0200 0 183 600-140 915 <br /> Matrix Spikg_Dun 8100157-MSD1 S8I0016-01 <br /> Benzene 10/9/98 0200 ND 0 175 mg/kg 600-140 87 5 25 0 114 <br /> Toluene 0200 ND 0 169 600-140 845 25 0 176 <br /> Ethylbenzene 0200 ND 0 169 600-140 845, 25 0 176 <br /> Xylenes(total) 0 600 ND 0 507 600-140 84 5 25 0 1 53 <br /> Methyl tert-butyl ether 0200 ND 0 192 600-140 960 250 2 11 <br />' Surrogate a,a a-Tris luorotoluene 0200 0 194 600-140 970 <br /> Batch 8100180 Date Prepared. 10/14/98 Extraction Method. EPA 5030B(MeOH) <br />' Blank 8100180-BLKI <br /> Purgeable Hydrocarbons 10/14/98 ND mg/kg 1 00 <br /> Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> ethyl tert-butyl ether ND 00500 <br /> Sequoia Analytical -Sacramento *Refer to end of report for text of notes and definmons <br /> n a C Schneider,Laboratory Director Page 10 of 16 <br />