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Sequoia 819 Striker Avenue,Suite 8 <br /> i S40"' 1 Sacramento,CA 95834 <br /> (916) 921-9600 <br /> q1w Analytical <br /> FAX(9 t G)921-0100 <br /> F <br /> Emcon-Cameron Park Project: ARCO 2186,Stockton Sampled: 6/24/99 to 6/25/99 <br /> 3939 Cambridge Road,Ste.202 Project Number: N/A Received: 6/25199 <br /> Cameron Park,CA 95682 Project,Manager: Mark Caps Reported: 7111199 <br /> Total Purgeable Hydrocarbons(C&C12),BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Pre ared Analyzed Limits Limit Result Units Notes" <br /> YL-3(4,1 ;9206437-10 Sid! <br /> Hydrocarbons 9070002 6/30/99 6/30/99 1.00 ND mg/kg <br /> Benzene „ „ 0 <br /> Toluene +, .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-Truororoluene 0.0500 ND " <br /> " 60.0-1400 <br /> 90.0 /o <br /> Purgeable Hydrocarbons ��1 <br /> 9070002 6130/99 6/30/99 <br /> Benzene 1. 1.00 ND mg/kg <br /> 31 <br /> Toluene to 0.00500 ND " <br /> Ethylbenzene „ 0.00500 ND <br /> „ <br /> " <br /> Xylenes(total) 0.00500 ND0.00500 ND <br /> Methyl tert-butyl ether „ <br /> Surrogate: a 0.0500 ND " <br /> ,a,a-Truorotaluene 60.1)-1400 <br /> 89.5 <br /> YL-5 b a Hydrocarbons �4 84[1 <br /> 9070002 6/30199 6/30/99 <br /> Benzene 1. 1.00 ND mg/kg <br /> Toluene 0.00500 ND " <br /> Ethylbenzene <br /> 0.00500 ND „ <br /> Xylenes(total) 0.00500 ND " <br /> „ „ n <br /> Methyl tett-butyl ether 0.00504 ND " <br /> 0.0500 ND " <br /> Surrogate.' a,a,a-Tr�uorotoluene " " " 60.0-140 <br /> 91.0 <br /> Purgeable HydrocarbonsS906437.13 <br /> 9060425 6/29/99 6129/99 <br /> Benzene to 1.00 ND mg/kg <br /> Toluene 0.00500 ND to <br /> Ethylbenzene „ 0.00500 ND " <br /> Xylenes(total) 0.00500 ND <br /> „ <br /> Surrogate: a,a,a-Trifluorotoluene <br /> 0.00500 ND <br /> Methyl cert-butyl etber to „ 60'0-140 93.0 % <br /> Surrogate: a,a,a-Trij7uoroto1uene 2.50 41.7 mg/kg D <br /> 60.0-140 91.5 % <br /> Purgeableim Hydrocarbons 590643L <br /> 9060425 6129/99 <br /> Benzene 6129/99 100 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 definitions• <br /> Page 4 of 16 <br />