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4DFAX819 Striker Avenue suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-96M <br /> q„r Analytical vr <br /> (916)91 ww.seq uo{alabs.coms.com <br /> • <br /> SECOR international-Rancho Cordova Project: ARCO 4493,Stockton,CA Sampled: 5/8/00 <br /> 3017 Kilgore Road,Suite 100 Project Number: N/A Received: 5110/00 <br /> Rancho Cordova,CA 95670 Project Mang er: Rusty Benkos Re orted: 5118100 <br /> To tal,Purgeable,Hydrgcarbons.(C6_C12)„BTEX:and,MTBE=by_DHS.LUETLQuality.Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov. RPD RPD <br /> Anal a <br /> Analyzed Level Result Result Units Recov.Limits % Limit % Notes* <br /> LCS(continued) 0050187-BS1 <br /> Methyl tert-butyl ether 5/16/00 0.200 0.152 mg/kg 70.0-130 76.0 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.196 60.0-140 98.0 <br /> Matrix SRike 0050187-MSI 5005178-27 <br /> Benzene 5/16/00 0.200 ND 0.145 mg/kg 60.0-140 72.5 <br /> Toluene " 0.200 ND 0.166 to 60.0-140 83.0 <br /> Ethylbenzene 0.200 ND 0.179 60.0-140 89.5 <br /> Xylenes(total) 0.600 ND 0.514 60.0-140 85.7 <br /> Methyl tort-butyl ether 0.200 0.666 0.682 60.0-140 8.00 4 <br /> Surrogate: a,a,a-Triuorotoluene 0.200 0.197 FF 60.0-140 98.5 <br /> Matrix Spike Dun 0050187-MSDI 5005178-27 <br /> Benzene 5/16/00 0.200 ND 0.147 mg/kg 60.0-140 73.5 25.0 1.37 <br /> Toluene 0.200 ND 0.167 60.0-140 83.5 25.0 0.601 <br /> Ethylbenzene 0.200 ND 0.180 60.0-140 90.0 25.0 0.557 <br /> Xylenes(total) 0.600 ND 0.520 " 60.0-140 86.7 25.0 1.16 <br /> Neth yl tert-butyl ether 0.200 0.666 0.751 60.0-140 42.5 25.0 137 4 <br /> Surrogate: a.a,a-Trifluorotoluene 0.200 0.197 60.0-140 98.5 <br /> Batch: 0050196 Date Prepared: 5/17/00 Extraction Method: EPA 5030B(MeOH) <br /> Man k 0050196-BLKI <br /> Purgeable Hydrocarbons 5/17/00 ND mg/kg 1.00 <br /> Benzene ND 0.00500 <br /> Toluene ND 0.00500 <br /> Ethylbenzene ND 0.00500 <br /> Xylenes(total) ND 0.00500 <br /> Methyl tort-butyl ether ND 0.0500 <br /> Surrogate: a;a,a-Trifluorotoluene 0.200 0.192 60.0-140 96.0 <br /> SCS 0050I96-BSI <br /> Benzene 5/17/00 0.200 0.219 mg/kg 70.0-130 109 <br /> Toluene 0.200 0.219 70.0-130 109 <br /> Ethylbenzene 0.200 0.217 70.0-130 108 <br /> Xylenes(total) 0.600 0.678 70.0-130 113 <br /> Methyl cert-butyl ether 0.200 0.203 70.0-130 101 <br /> Surrogate: a,a,a-Trifluorotoluene 0.200 0.194 60.0-140 97.0 <br /> Matrix Snike 0050196-MSI S005194-06 <br /> Benzene 5117/00 0.200 ND 0.175 mg/kg 60.0-140 87.5 <br /> Toluene 0.200 ND 0.178 60.0-140 89.0 <br /> Ethylbenzene of 0.200 ND 0.179 60.0-140 89.5 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions. <br /> Page 15 of 22 <br />