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680 G.�sapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9Z33 <br /> Sequoia 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Sinker Avenue Suite 8 Sacramento CA 95834 (9m)921-9600 FAX(916)921-0100 <br /> Analytical <br /> 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Pacific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 10/6/98 <br /> 11315 Sunnse Gold Circle St M Project Number 910-017 1 A Received 10/7198 <br />' Rancho Cordova,CA 95742 Project Manager Mike Mttchener Reported 10/20/98 <br /> Total Purgeable Hydrocarbons(C&C12)and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> ' Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> ' Batch. 8100180 Date Prepared. 10/14/98 Extraction Method, EPA 5030B(MeOlo <br /> Blank 8100180-BLK1 <br /> Purgeable Hydrocarbons 10/14/98 ND mg/kg 100 <br /> ' Benzene ND 000500 <br /> Toluene ND 000500 <br /> Ethylbenzene ND 000500 <br /> Xylenes(total) ND 000500 <br /> ' Surrogate a,a a-Tr fluorotoluene 0200 0 177 600-140 885 <br /> LC S <br /> 8100180-BSI <br /> ' Benzene 10/14/98 0200 0200 mg/kg 700-130 100 <br /> Toluene 0200 0 191 700-130 955 <br /> Ethylbenzene 0200 0 188 700-130 940 <br /> Xylenes(total) 0 600 0 559 700-130 93 2 <br /> rrogate a,a a-Trlfluorotoluene 0200 0 183 " 600-140 915 <br /> Matrix Spike 8100180-MSl 5810080-08 <br /> Benzene 10/14/98 0200 ND 0 180 mg/kg 600-140 900 <br /> Toluene 0200 ND 0 170 600-140 85 0 <br /> Ethylbenzene 0200 ND 0 170 600-140 85 0 <br /> Xylenes(total) 0 600 ND 0 510 600-140 850 <br /> Surrogate a a a-Trifluorotoluene 0200 0 179 600-140 895 <br /> Matrix Spike Spike 8100180-MSD/ 5810080-08 <br /> Benzene 10/14/98 0200 ND 0 178 mg/kg 600-140 890 25 0 1 12 <br /> 'Toluene 0200 ND 0 168 600-140 840 25 0 1 18 <br /> Ethylbenzene 0200 ND 0 169 600-140 84 5 25 0 0 590 <br /> Xylenes(total) 0 600 ND 0 507 600-140 84 5 25 0 0 590 <br /> Surrogate a a a-Trifluorotoluene 0200 0184 600-140 92 0 <br /> i <br /> Sequol nalytical-Sacramento *Refer to end of report far text of notes and definitions <br /> mda C Schneider,Laboratory Director Page 7 of 13 <br /> r�i <br />