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Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento, CA 95834 <br /> Analytical (916)921-9600 <br /> FAX(916) 921-0100 <br /> EMCON-CP <br /> Project: ARCO 2186,Stockton,CA <br /> 3939 Cambridge Ave Project Number: 21775-237-002 Sampled: 6/17/99 <br /> Cameron Park,CA 95682Received: 6/18/99 <br /> Project Manager: Mark Capps Reported: 7/1/99 <br /> Total Purgeable Hydrocarbons(C6-C1.2),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 /> D-2(5')(_Un inn dl 5906319-]0 <br /> Benzene 9060355 6/24/99 6/24/99 S" <br /> Toluene 0.00500 ND mg/kg <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 0.0629 " <br /> 60.0-140 103 <br /> Pu0-3 <br /> geabS906319-11 <br /> le Hydrocarbons <br /> 9060355 6/24/99 6/24/99 <br /> Benzene 1.00 ND mg/kg <br /> ,� <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 0.0155 " <br /> Xylenes(total) 0.00500 ND <br /> Methyl cert-butyl ether 0.00500 0.0247 " <br /> Surrogate: a,a,a-Trifl:�orotoluene " 0.0500 ND " <br /> 60.0-140 96.0 <br /> DA(5') 5906319-12 <br /> Purgeable Hydrocarbons 9060355 6/24/99 6/24/99 SQ11 <br /> Benzene 1.00 ND 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 0.00874 <br /> Surrogate. a,a,a-Trifluorotoluene 0.0500 ND " <br /> 60.0-140 99.5 <br /> 5906319-13 <br /> Purgeable Hydrocarbons 9060355 6/24/99 6/24/99 SA <br /> Benzene 1.00 ND nig/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 /> Scrrrogate: a,a,a-Trifluoro[oluene 0.0500 ND " <br /> 60.0-140 98.S <br /> PurgeableD Hydrocarbons5906319-14 <br /> 9060355 6/24/99 6/24/99 <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 /> 0.0500 0.237 " <br /> Sequoia Analytical-Sacramento <br /> *Refer to end of report for text of notes and definitions. <br /> Q Page 4 of 14 <br />