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Sequoia 819 Striker Avenue,Suite 8 <br /> 958 <br /> Sacramento, CA 95834 <br /> (916)92 t-9600 <br /> Analytical FAX(916)921-0100 <br /> 1T Group-Rancho Cordova Project: Tosco#4409, Stockton,CA Sampled: 6/2199 <br /> 11315 Sunrise Gold Circle#A Project Number: N/A Received: 6/3/99 <br /> Rancho Cordova,CA 95742 Project Manager: Mike Mitchener Reported: 6/23/99 <br /> Total Purgeable Hydrocarbons(C&02),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> Batch: 906010 Date Prepared: 6/7/99 Extraction Method: EPA 5039B(MeOHI <br /> BIU& 9060100-BLKI <br /> Purgeable Hydrocarbons 6/7/99 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> ND 0.00500 <br /> Ethylbenzene <br /> Xylenes(total) ND 0.00500 <br /> Methyl tent-butyl ether ND 0.0500 <br /> Surrogate: a,a,a-Trifluorotoluene 0.100 0.192 60.0-140 96.0 <br /> LCS 2060100-BSI <br /> Benzene 6/7/99 0.200 0.211 mg/kg 70.0-130 305 <br /> Toluene 0.200 0.228 70.0-130 114 <br /> Ethylbenzene 0.200 0.229 70.0-130 114 <br /> enes(total) 0.600 0.611 70.0-130 102 <br /> yl ten butyl ether 0.200 0.213 70.0-130 106 <br /> urrogate: a,a,a-Tri T.orotoluene 0.200 0.191 60.0-140 96.0 <br /> Matrix S9ike 9060100-MSI 5206005-01 <br /> Benzene 6/7/99 0.200 ND 0.187 mg/kg 60.0-140 93.5 <br /> Toluene 0.200 ND 0.199 60.0-140 99.5 <br /> Ethylbenzene 0.200 ND 0.202 " 60.0-140 101 <br /> Xylenes(total) 0.600 ND 0.552 60.0-140 92.0 <br /> Methyl ten-butyl ether 0100 ND 0.172 " 60.0-140 86.0 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.192 60.0-140 96.0 <br /> 9060100-l%ISDI S9( 09501 <br /> Benzene 6/7/99 0.200 ND 0.181 mg/kg 60.0-140 90.5 25.0 3.26 <br /> Toluene 0.200 ND 0.187 60.0-140 93.5 25.0 6.22 <br /> Ethylbenzene 0.200 ND 0.198 60.0-140 99.0 25.0 2.00 <br /> Xylenes(total) 0.600 ND 0.539 60.0-140 89.8 25.0 2.42 <br /> Methyl tert-butyl ether 0.200 ND 0.173 " 60.0-140 86.5 25.0 0.580 <br /> Surrogate: a,a,a Trifluorotoluene 0.200 0.189 60.0-140 94.5 <br /> atch: 9Iw" Date Prepared: 6/7199 Extraction Method: EPA 5030B[PITC <br /> Blah 9060110-BLKI <br /> Purgeable Hydrocarbons 6/7/99 ND ug/I 50.0 <br /> Benzene " ND 0'500 <br /> Toluene ND 0.500 <br /> Ethylbenzene ND 0.500 <br /> Xylenes(total) ND 0.500 <br /> ethyl tert-butyl ether ND 5.00 <br /> equoia Analytical-Sacramento *Refer to end of report for text of nares and definitions. <br /> Page 6 of 10 <br /> l <br />