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819 Striker Avenue Suite 8 <br /> ento CA <br /> a- )r Sequoia5834 <br /> (916)921-9600 <br /> 9 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs corn <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA Sampled 6/7/00 <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Received 618/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 6/22/00 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limlt Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0060212 Date Prepared 6/21/00 Extraction Method EPA 5030B McOH <br /> Blank 0060212-BLKI <br /> Purgeable Hydrocarbons 6/21/00 ND ug/1 500 <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 10 2 -600-140 102 <br /> LC5 0060212-BSI <br /> Benzene 6/21/00 10 0 109 ug/I 700-130 109 <br /> Toluene 10 0 10 6 700-130 106 <br /> Ethylbenzene loo 10 8 700-130 108 <br /> V(total) " 300 319 700-130 106 -- <br /> tert-butyl ether too 110 700-130 110 <br /> Surrogate a a a-Trifluorotoluene 100 103 600-140 103 <br /> Matrix Spike 0060212-MSI S006107-11 <br /> Benzene 6121100 100 ND 107 ug/l 600-140 107 <br /> Toluene 10 0 ND 103 600-140 103 <br /> Ethylbenzene 100 ND 105 600-140 105 <br /> Xylenes(total) 300 ND 31 3 600-140 104 <br /> Methyl tert-butyl ether_ _ _ 100 ND 115 _ _ 600-140 115 <br /> Surrogate a,a,a-Trifluorotoluene �- 100 114 600-140 114 <br /> Matrix Spike Dup 0060212-MSD1 5006107-11 <br /> Benzene 6121/00 10 0 ND 10 4 ug/l 600-140 104 250 284 <br /> Toluene 100 ND 107 600-140 1107 250 381 <br /> Ethylbenzene too ND 106 600-140 106 250 0 948 <br /> Xylenes(total) 300 ND 315 600-140 105 25 0 0 957 <br /> Methyl tert-butyl ether 100 ND 104 600-140 104 25 0 100 <br /> Surrogate a a a-Trifluorotoluen-e 10 0 104 600-140 104 <br /> Se&Mta Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 3 of 4 <br />