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�J <br /> 819 Striker Avenue Suite 8 <br /> C eq �oira Sacramento C95834 <br /> 4 a- ) J l.� i� (916)922 1-9600 <br /> FAX(916)921-0 100 <br /> Analytical www sequoialabs`om <br /> to <br /> SECOR International-Rancho Cordova Project ARCO 595, Stockton,CA Sampled 6/16/00 <br /> 3017 Kilgore Road,Suite 100 Project Number NIA Received 6116100 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 6130100 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> i <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Anal e Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0060274 Date Prepared 6128100 Extraction Method EPA 5030E McOH <br /> Blank 0060274-BLK1 <br /> Purgeable Hydrocarbons 6128100 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 tent-butyl ether ND 2 50 <br /> Surrogate a a a-Tris luorotoluene 100 100 600-140 100 <br /> LCS 0060274-BSI <br /> Benzene 6128100 100 11 1 ug/l 700-130 111 <br /> Toluene 100 108 700-130 108 <br /> Ethylbenzene 100 110 700-130 110 <br /> s(total) 300 328 " 700-130 109 <br /> W1tert-butyl ether It100 110 700-130 110 <br /> Surrogate a a,a-Trifluorotoluene 100 105 600-140 105 <br /> Matrix Spike 0060274-MSI S006210-05 <br /> Benzene 6128100 100 ND 108 ug/l 600-140 108 <br /> Toluene 100 ND 108 to600-140 108 <br /> Ethylbenzene 100 ND 107 600-140 107 <br /> Xylenes(total) 300 ND 31 9 600-140 106 <br /> Methyl tert-butyl ether 100 ND 102 600-140 102 <br /> Surrogate a,a a-Trifluorotoluene 100 103 600-140 103 <br /> Matrix Spike Pup 0060274-MSD1 5006210-05 <br /> Benzene 6/28/00 100 ND 934 ug/l 600-140 93 4 25 0 145 <br /> Toluene 100 ND 104 600-140 104 250 377 <br /> Ethylbenzene 100 ND 9 95 600-140 995 25 0 726 <br /> Xylcnes(total) 300 ND 291 600-140 970 250 8 87 <br /> Methyl tert-butyl ether 100 ND 673 600-140 673 250 410 2 <br /> Surrogate a,a,a-Trifluorotoluene 100 886 600-140 886 <br /> Batch 0060309 Date Prepared 6129/00 Extraction Method EPA 5030E(MeOH) <br /> Blank 0060309-BLK1 <br /> Purgeable Hydrocarbons 6129100 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 /> I Cert-butyl ether ND 250 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 9 <br />