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Sequoia <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> qwr Analytical (916) 921-9600 <br /> FAX(916)921-010Q <br /> Emcon-Cameron Park Project: ARCO 2186,Stockton <br /> 3939 Cambridge Road,Ste.202 PSampled: G/24/99 to 6/25/99 <br /> Cameron Park,CA 95682 Project <br /> Number: N/A , <br /> Project Manager: 'Mark Capps Received: 6/25/99 <br /> Reported: 7/11/99 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Anal a Number Prepared Analyzed Limi#s <br /> Limit Result Units Notes• <br /> Methyl tert-butyl ether 9070010 7/1/99 <br /> Di-isopropyl ether 7/8199 0.100 ND mg/kg <br /> Ethyl tert-butyl ether 0.100 ND <br /> Tert-amyl methyl ether 0.100 ND . <br /> Ethanol 0.100 ND <br /> Surrogate: 1,2-LA-A-d4 150 ND <br /> 60.0-140 99.6 <br /> YL 4 4;1 <br /> Tert-butyl alcohol 5906437.11 <br /> Methyl tert-butt'!ether 9070075 7/6/99 7/8/99 I0.0ND mg/kg <br /> Di-isopropyl ether 0.100 ND " <br /> Ethyl tert-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND <br /> Ethanol 0.100 ND <br /> Surrogate; 1,2-Dt;4-d4 „ oo 150 ND " <br /> 60.0-140 Jul <br /> 5 ' <br /> Tert-butyl alcohol 99 <br /> 9070075 7/6/99 7/8/ SAW <br /> Methyl tert-butyl ether 6 „ 10.0 ND mg/kg <br /> Di-isopropyl ether. 0.100 ND " <br /> Ethyl tent-butyl ether 0.100 ND " <br /> Tert-amyl methyl ether 0.100 ND <br /> Ethanol 0.100 ND <br /> Surrogate: 1,2-DCA44 150 ND <br /> 60.0-140 106 <br /> Tert-butyl alcohol 5906437-1 z� <br /> Methyl Cert-butyl ether 9070075 7/6/99 7/9/99 <br /> 40.0 ND mg/kg D <br /> Di-isopropyl ether „ 0.400 33.2 " D <br /> Ethyl tert-butyl ether 0.400 ND D <br /> Tert-amyl methyl ether „ 0.400 ND D <br /> Ethanol „ 0.400 ND D <br /> Surrogate: 1,24)C,444 600 ND D <br /> 60.0 140 110 <br /> D <br /> Tert-butyl alcohol 5206437-14 54iI <br /> 9070121 7/9199 7/9/99 <br /> Methyl tert-butyl ether „ 10.0 ND mg/kg <br /> Di-isopropyl ether 0.100 11.9 <br /> Ethyl tert-butyl ether 0.100 ND <br /> Tert-amyl methyl ether <br /> 0,100 ND " <br /> Ethanol „ 0.100 <br /> „ 0.321 <br /> 150 ND " <br /> Sequoia Analytical-Sacramento <br /> *Refer to end of report for text of notes and definitions. <br /> Page 9 of 16 <br />