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® Sequoia 819 r Avenue,Suite 8 <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> EMCON/1T-Sacramento Project ARCO 2130, Stockton,CA Sampled 3/16/00 <br /> 1433N Market Blvd,#1 Project Number 803879 Received 3/17100 <br /> Sacramento,CA 95834 Project Manager Dave Foley Reported 3/24/00 <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-1 (73') 5003246-01 Water <br /> Tert-butyl alcohol 0030237 3/23/00 3/23/00 200 ND ug/l <br /> Methyl tert-butyl ether 200 ND " <br /> Di-isopropyl ether 2 00 ND <br /> Ethyl tert-butyl ether 200 ND " <br /> Tertt-amyl methyl ether 200 ND <br /> Surrogate 12-DCA-d4 600-140 116 % <br /> 1)A, W-2(72') S003246-02 Water <br /> Tert-butyl alcohol 0030237 3/23100 3123/00 200 ND ug/l <br /> Methyl tert-butyl ether 2 00 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> �rt_arnyl methyl ether _ 200 NDIF <br /> agate 1 2-DCA-d4 600-140 111 % <br /> MW-3(73') 8003246-03 Water <br /> Tert-butyl alcohol 0030237 3/23/00 3/23/00 200 ND ug/1 <br /> Methyl tert-butyl ether 2 00 ND " <br /> Di-isopropyl ether 200 ND " <br /> Ethyl tert-butyl ether " 200 ND " <br /> Tert-amyl methyl ether _-__ __ 200 _ND <br /> Surrogate 1 2-DCA-d4 600-140 114 % <br /> MW-4(73') 5003246-04 Water <br /> Tert-butyl alcohol 0030237 3/23/00 3/23/00 200 ND ug/1 <br /> Methyl tert-butyl ether It " 112 00 ND " <br /> Di-isopropyl ether <br /> " 200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> _Tert-amyl methyl ether " 200 ND <br /> Surrogate 1,2-DCA-d4 600-140 118 % <br /> M�74'1 5003246-05 Water <br /> Tert-butyl alcohol 0030237 3/23100 3/23/00 200 ND ug/1 <br /> Methyl tett-butyl ether " " 2 00 2 96 " <br /> Di-isopropyl ether It200 ND " <br /> Ethyl tert-butyl ether 200 ND " <br /> _Te_-amyl methyl ether 200 ND _ <br /> Surrogate 1,2-DC,444 600-140 121 % <br /> _WW-6 72' 5003246-06 Water <br /> IRbutyl alcohol 0030239 3/24/00 3124/00 200 ND ug/l <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 4 of 9 <br />