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' Sequoia 680 Chesapeake Dnve Redwood City Y CA 9406 ( 10) 364 9600 FAX(650)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 9459$ (5I0) 986 9600 FAX(510)9$$ 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Environmental Group-Sac Project Chevron 9-9840,Stockton,CA Sampled 4/15/98 <br /> 11315 Sunrise Gold Circle St M Project Number 920-122 1 B Received 4/15/98 <br /> Rancho Cordova,CA 95742 Project Manager Tim Anenson Reported 4/21/98 <br /> Total Purgeable Petroleum Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal e Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> /latch, 8040091 Extraction Method, EPA,.S -30B(PA) <br /> Blank 8040091-131.K1 <br /> Purgeable Hydrocarbons 4/16/98 ND ug/I Soo <br />' Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 <br /> Methyl tert-butyl ether "I ND 500 <br /> Surrogate a,a,a-Trtfluorotoluene 100 929 600-140 92 9 <br />' LCE 8040091-1351 <br /> Benzene 4/16/98 100 103 ug/I 700-130 103 <br /> Toluene 100 965 700-130 965 <br /> Ethylbenzene 100 953 700-130 95 3 <br /> 0,ylenes(total) " 110 28 3 " 70 0-130 94 3 <br /> ethyl tert-butyl ether 10 0 10 9 70 0-130 109 <br /> Surrogate aaa Tnfluoroiolue,re 10 0 9 59 60 0-140 95 9 <br /> Matrix Spike 8040091-MSI 5804034-00 <br /> Benzene 4/16/98 100 ND 999 ug/1 600-140 999 <br /> Toluene 10 0 ND 9 32 600-140 93 2 <br />' Ethylbenzene " 100 ND 919 600-140 91 9 <br /> Xylenes(total) 300 ND 272 600-140 907 <br /> Methyl tert-butyl ether 100 ND it 0 600-140 110 <br /> Surrogate a a a-Trifluorotoluene or 100 923 600-140 92 3 <br /> 1 Matrix Spike Duo 8040091-MSOI 5804034-00 <br /> Benzene 4/16/98 too ND 10 1 ug/l 600-140 101 25 0 1 10 <br />' Toluene „ too ND 977 600-140 977 25 0 471 <br /> Ethylbenzene t 0 0 ND 9 63 600-140 963 25 0 468 <br /> Xylenes(total) 300 ND 282 600-140 940 25 0 357 <br /> Methyl ter(-butyl ether 100 ND 975 600-140 975 25 0 120 <br /> Surrogate a a a-Trifluorotoluene 100 927 600-140 91 7 <br /> Sequoia Analytical -Sacramento *Refer to cnd ofmpott for text ofnotcs and definitions <br /> C Schnctder aboratary Director Page 3 of 4 <br />