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1 <br /> Sequoia 68o Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9Z33 <br /> 404 N Wlget lane Walnut Creek CA 94598 (92S)988-9600 FAX(9Z5)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 Petalum,16 CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Pacific Environmental Group-Sac Project Unocal 0123,Tracy,CA Sampled 1016198 <br /> 11315 Sunrise Gold Circle St M Project Number 910-017 1 Received 10/7/98 <br />' Rancho Cordova,CA 95742 Project Manager Mike Mitchener Reported 10/16/98 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> AnaE e Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br />' Batch 8100185 Date Prepared, 10/13/98 Extraction Method, EPA 50-30B(PIT) <br /> Blank 8100185-BLK 1 <br /> Purgeable Hydrocarbons 10/13/98 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> tSurrogate a a a-Trefluorotoluene 100 996 600-140 996 <br /> LCS 8100185-BSI <br /> Benzene 10/13/98 100 105 ug/1 700-130 105 <br /> Toluene 100 999 „ 700-130 999 <br /> Ethylbenzene 100 978 700-130 978 <br /> Xylenes(total) 300 290 700-130 967 <br /> Wrogate a s a-Trefluorotoluene 100 961 600-140 961 <br /> Matrix Spike 8100185-MSI 5810024-05 <br /> Benzene 10/13/98 100 ND l0 6 ug/1 600-140 106 <br /> Toluene 100 ND 999 " 600-140 999 <br /> Ethylbenzene 100 ND 991 600-140 991 <br /> Xylenes(total) 300 ND 294 600-140 98 0 <br /> Surrogate a,a,a-Trefluorotoluene 100 986 " 600-140 986 <br /> Matrix Spike Duo 8100185-M D1 S810024-05 <br /> Ben7ene <br /> 10 24- <br /> Benzene 10/13/98 100 ND 106 ugll 600-140 106 250 0 <br />' Toluene 100 ND 101 " 600-140 101 250 1 10 <br /> Ethylbenzene too ND 995 600-140 995 250 0 403 <br /> Xylenes(total) 300 ND 297 600-140 990 250 102 <br /> Surrogate a s a-Trefluorotoluene 100 949 600-140 949 <br /> 1 <br /> Sequoia Analytical -Sacramento *Refer to end of report for text of notes and definitions <br />(da C Schneider, Laboratory Director Page 7 of 13 <br /> ,P� <br />