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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)9z 1-9600 <br /> Analytical wsFAX(91921-0100 <br /> wwequoialabs.com <br /> Delta Environmental Consultants-Cameron Park Project: ARCO 5469, Stockton,CA Sampled: 9/8/00 <br /> 3330 Cameron Park Dr. Project Number: N/A Received: 9/8/00 <br /> Cameron Park,CA 95682 Project Manager: Jay Johnson Reported: 9/27/00 <br /> Volatile Oxygenate Compounds by EPA Method 8260A <br /> Sequoia Analytical-Sacramento <br /> Batch Date Date Surrogate Reporting <br /> Analyte Number Prepared Analyzed Limits Limit Result Units Notes* <br /> MW-4(continued) 5009110-04 Water <br /> Methyl tert-butyl ether 0090202 9/22/00 9/22/00 4.00 1220 ug/1 D <br /> Surrogate: 1,2-DCA-d4 60.0-140 110 % <br /> MW-5 $009110-05 Water <br /> Tert-butyl alcohol 0090199 9/21/00 9/22/00 200 367 ug/l <br /> Di-isopropyl ether " 2.00 ND " <br /> Ethyl tent-butyl ether 2.00 ND " <br /> Tert-amyl methyl ether 2.00 10.4 " <br /> Ethanol " " " 3000 ND " <br /> 1,2-Dichloroethane 2.00 ND " <br /> Ethylene dibromide " 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 104 % <br /> Methyl tert-butyl ether 0090202 9/22/00 40.0 10300 ug/l D <br /> Surrogate: 1,2-DCA-d4 60.0-140 112 % <br /> 0 SO09110-06 Water <br /> Fert-butyl alcohol 0090199 9/21/00 9122/00 200 ND ug/l <br /> Di-isopropyl ether 2.00 ND " <br /> Ethyl tert-butyl ether 2.00 5.00 " <br /> Tert-amyl methyl ether 2.00 8.10 " <br /> Ethanol 3000 ND " <br /> 1,2-Dichloroethane 2.00 ND " <br /> Ethylene dibromide " 2.00 ND " <br /> Surrogate: 1,2-DCA-d4 60.0-140 105 % <br /> Methyl tert-butyl ether 0090202 9/22/00 40.0 6690 ug/I D <br /> Surrogate: 1,2-DCA-d4 60.0-140 111 % <br /> -JWis Analytical-Sacramento *Refer to end of report for text of noles and definitions. <br /> Page 5 of 12 <br />