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T Sequoia j 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> (916) 921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> EMCON-CP Project: ARCO 2186,Stockton,CA Sampled: 6/17/99 <br /> 3939 Cambridge Ave Project Number: 21775-237-002 Received: 6/18/99 <br /> Cameron Park,CA 95682 Project Manager: Mark Caps Reported: 7/1/99 <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 Limit Result Units Notes* <br /> S-W-W(18'1 S906319-01 &H <br /> Purgeable Hydrocarbons 9060355 6/24/99 6124199 100 1840 mg/kg l,D <br /> Benzene 0.500 ND D <br /> Toluene " 0.500 ND D <br /> Ethylbenzene 0.500 I.21 D <br /> Xylenes(total) 0,500 42.1 D <br /> Methyl tert-butyl ether 5.00 8.03 D <br /> Surrogate: a,a,a-Trii luorotoluene 60.0-140 93.5 <br /> S ElL ) S9 6312 5211 <br /> Purgeable Hydrocarbons 9060355 6124199 6/24/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND <br /> Xylenes(total) 0.00506 0.0142 " <br /> Methyl tert-butyl ether 0.0500 1.83 " <br /> Surrogate: a,a,a-Trifluorotoluene 60.0-140 98.0 <br /> SM-S(1 8') S206319_03 <br /> Purgeable Hydrocarbons 9060355 6124199 6/24/99 1.00 ND mglkg <br /> Benzene 0.00500 ND " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes.(total) 0.00500 ND " <br /> Methyl tert-butyl ether 0.0500 0.131 " <br /> Surrogate: a,a,a-TriJluorololuene 60.0-140 98.5 % <br /> S=N(l 8-1 5906319-04 S <br /> Purgeable hydrocarbons 9060355 6/24/99 6/24/99 50.0 364 mg/kg 2,D <br /> Benzene 0.250 0.545 2, <br /> Toluene " " „ 0.250 7.71 D <br /> Ethylbenzene 0.250 3.97 D <br /> Xylenes(total) 0.250 24.0 . D <br /> Methyl tert-butyl ether 2.50 37.0 D <br /> Surrogate: a,a,a=Trifluorotoluene b0.0-140 101 % <br /> 1! f4') S906314-05 soil <br /> Purgeable Hydrocarbons 9060355 6/24/99 6/24/99 1.00 ND mg/kg <br /> Benzene 0.00500 ND. " <br /> Toluene 0.00500 ND " <br /> Ethylbenzene 0.00500 ND " <br /> Xylenes(total) " 0.00500 ND " <br /> Sequoia Analytical-Sacramento *Refer to end of report for text ofnotes and definitions. <br /> Page 2 of 14 <br />