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IA <br /> Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 4 a- ) (916) 921 9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs corn <br /> wo <br /> SECOR International-Rancho Cordova Project ARCO 434, Lodi, CA Sampled 4128/00 <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Received 512/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 5115/00 <br /> Total Purgeable Hydrocarbons(C6-Cl2), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical- Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> knal,xtc Analyzed Level Result Result Units Recov Limits % Limit % Notcs* <br /> Batch 0050107 Date Prepared 518/0.0_ Extraction Method EPA 5030B(Me0HI <br /> Blank 0050107-BLK1 <br /> Purgeable Hydrocarbons 5/8/00 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 /> _Methyl tert-butyl ether ND 250 <br /> Surrogate a,a,a-Trifluorotoluene 100 849 600-140 849 <br /> LCS 0050107-BSI <br /> Benzene 518/00 100 9 73 ug/I 700-130 973 <br /> Toluene 100 962 700-130 962 <br /> E enzene 100 972 700-130 972 <br /> s(total) 300 290 700-130 967 <br /> Methyl tert-butyl ether too 963 70 0430 963 <br /> Surrogate a a,a-Trifluorotoluene 100 819 600-140 81 9 <br /> Matrix Spike 0050107-MS1 S005051-10 <br /> Benzene 518/00 100 ND 103 ug/l 600-140 103 <br /> Toluene too ND 102 600-140 102 <br /> Ethylbenzene 100 ND 102 600-140 102 <br /> Xylenes(total) 300 ND 307 600-140 102 <br /> Methyl tert-butyl ether 100 ND 112 600-140 112 <br /> Surrogate a,a,a-Triuorotoluene 100 873 600-140 873 <br /> Matrix Spoke Duo 0050107-MSD1 5005051-10 <br /> Benzene 5/8100 too ND 971 ug/l 600-140 971 250 590 <br /> Toluene 100 ND 986 600-140 986 250 3.39 <br /> Ethylbenzene 100 ND 972 600-140 972 250 482 <br /> Xylenes(total) 300 ND 291 600-140 970 250 503 <br /> Methyl tert-butyl ether 100 ND 773 600-140 773 250 367 2 <br /> Surrogate a a,a-Tr fluorotoluene 100 835 600-140 835 <br /> Batch 0050110 Date Prepared 519/00 Extraction Method EPA 5030B(MeOH) <br /> Blank 0050110-BLK1 <br /> Purgeable Hydrocarbons 519100 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> es(total) ND 0 540 <br /> I 1 Cert-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 5 of 8 <br />