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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> Emcon-Cameron Park <br /> Project: ARCO 2186,Stockton Sampled: 6/24/99 to 6/25199 <br /> 3939 Cambridge Road,Ste,202 Project Number: N/A Received: 6125199 <br /> Cameron Park,CA 95682 Project Manager: Mark Capps Re orted: 7/11199 <br /> Total Purgeable Hydrocarbons(C6-Cl2),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes <br /> i ed) 52Q64 7-05 mil <br /> Surrogate. a,a,a-Trifluorotoluene 9060425 6129199 6129/99 60.0-140 92.0 % <br /> Methyl tert-butyl ether 1. 1, 1. 2.50 36.3 mg/kg D <br /> Surrogate: a,a,a-Tr,i luorotoluene 60.0-14094.0 % <br /> ptA 1(5'1 5906437-u S4i1 <br /> Purgeable Hydrocarbons 9070002 6130199 6130199 100 ND mg/kg <br /> Benzene 1. 1. . <br /> Toluene „ <br /> 0.00500 ND " <br /> Ethylbenzene „ 0.00500 ND " <br /> " <br /> Xylenes(total) 0.00500 ND <br /> Methyl ter'-butyl ether 0.0500 0.495 " <br /> Surrogate: a,a,a-TriJluorotoluene " 60 0-140 0 <br /> 87.5 <br /> Purgeable1 Hydrocarbons S2Q6437-07 <br /> 9060425 6/29199 6/29/99 <br /> Benzene 1.00 ND mg/kg <br /> �� <br /> Toluene „ 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) „ <br /> 0.00500 ND " <br /> Methyl tent-butyl ether 0.00500 0.00720 " <br /> Surrogate: a, 0.0500 ND " <br /> a,a-Tr�uoroioluene 60.0-140 0 <br /> 88.S <br /> Purgeable')Hydrocarbons S906437-oR-0 <br /> 9070002 6/30/99 6/30/99 <br /> SA <br /> Benzene I.00 ND mg/kg <br /> Toluene „ 0.00500 ND <br /> „ <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) „ 0.00500 ND <br /> Methyl tert-butyl ether „ 0.00500 ND " <br /> Surrogate: a,a,a-TrYhuoro0.0500 ND <br /> 60.0-140 91.5 % <br /> YL- <br /> Purgeable Hydrocarbons SA9070002 6130/99 6/30199 <br /> Benzene ., 1.00 ND rng/kg <br /> „ <br /> Toluene to 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) „ 0.00500 ND " <br /> Methyl tent-bury!ether 0.00500 ND " <br /> Surrogate: a,a,a-Tr�uorotoluene 0.0500 ND ' <br /> 60.0-140 0 <br /> 87,S <br /> Sequoia Analytical-Sacramento <br /> *Refer to end of report for test of notes and definitions. <br /> Page 3 of 16 <br />