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Sequoia 819 Striker Avenue,Suite 8 <br /> Sacramento, CA 95834 <br /> Analytical (916)921-9600 <br /> FAX (916)921-0100 <br /> Emcon-Cameron Park <br /> Project: ARCO 2186,Stockton Sampled: 6/24/99 to 6/25/99 <br /> 3939 Cambridge Road,Ste.202 Project Number: N/A <br /> Cameron Park,CA 95682Received: 6/25/99 <br /> Project Manager: Mark Capps Reported: 7/11/99 <br /> Total Purgeable Hydrocarbons(C6-C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits <br /> Limit Result Units Notes* <br /> PurYL-3 <br /> g ab a Hydrocarbons 5906437-]0 <br /> 9070002 6/30/99 6/30/99 <br /> Benzene 1.00 ND mg/kg <br /> �� <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND " <br /> Surrogate. a,a,a-Truorotoluene 0.0500 ND <br /> 60.0-i40 90.0 <br /> Pury <br /> YL- (4') <br /> HydrocarbonsS906437-11 Soil <br /> 9070002 6/30/99 6/30/99 1.00 ND <br /> Benzene mg/kg <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 0.0500 ND <br /> 60.0-140 89.5 <br /> Y-L-S4' <br /> Purgeable Hydrocarbons 5906437-]2 5411 <br /> 9070002 6/30/99 6/30/99 <br /> Benzene 1.00 ND mg/kg <br /> „ <br /> Toluene <br /> 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.00500 ND " <br /> Surrogate: a,a,a-Trifluorotoluene 0.0500 ND " <br /> 60.0-140 910 <br /> Purgeable HydrocarbonsS906437-13/99 <br /> 9060425 6/29/99 6/291.00 ND <br /> soil <br /> Benzene �� „ mg/kg <br /> Toluene 0.00500 ND <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) 0.00500 ND <br /> Surrogate: a,a,a-Triuorotoluene0.00500 ND " <br /> 60.0-140 <br /> Methyl tert-butyl ether 93.0 % <br /> Surrogate: a,a,a-Trifluorotoluene 2.50 41.7 mg/kg D <br /> 60.0-140 91.5 <br /> Purgeable Hydrocarbons590 14 Sa <br /> Benzene <br /> 9060425 6/29/99 6/29/99 100 3020 mg/kg 1,D <br /> �� „ <br /> Toluene 0.500 0.634 D <br /> Ethylbenzene 0.500 35.4 D <br /> 0.500 23.2 D <br /> Sequoia Analytical-Sacramento <br /> *Refer to end of report for text of notes and def nitions. <br /> Page 4 of 16 <br />