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C. <br /> nal tical Laborator esi� nc. <br /> GeoA � � <br /> 1405 Kansas Avenue Modesto,CA 95351 Phone(209)572-0900 Fax(209)572-0916 <br /> no <br /> 1 <br /> CERTIFICATE OF ANALYSIS <br /> # <br /> Oxygenates i� Date: 5/09/03 <br /> Report P122-12 <br /> I <br /> Date Rec'd: 5/02/03/02/03 <br /> Thorpe Oil Project- Thorpe's Yard Date Started: 5/06/03 <br /> PO Box 357 Date Completed6/06/03 <br /> Lodi CA 95241 PO# i F <br /> Date Sampled: 5/02/03 <br /> Sampler: R Azevedo(Geo) <br /> Sample YD Lab ID RL Method Analyte Results Units <br /> ii <br /> 4' P200652 10 8260E Methyl tett-bl tyl ether(MTBE) ND µg/Kg <br /> Dispenser#12® <br /> 400 Ethanol �� i ND <br /> 200 tert-Butanol ) !'I ND <br /> 10 di-Isopropyl ether(DIPE) ND <br /> 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> Surrogate Amnt Spiked Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 20 21.4 107.0 66-133 <br /> 2-13romo-1-chloropropane 20 22.5 112.5 63-139 <br /> 4-Bromofluorobenzene 20 i 17.2 86,0 64-136 <br /> I <br /> I� ip <br /> Dispenser#I 4' P200653 10 8260B Methyl tert-butyl ether(MTBE) 211 µg/Kg <br /> 400 Ethanol ,j ND <br /> 200 tert-Butanol�� 1610 <br /> - 10 di-Isopropyl;ether(DIPE) ND <br /> 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) . ND <br /> �i <br /> Surrogate Amnt{Spiked h Amnt Rec. %Recovery QC Limit% <br /> 1,2-Dichloroethane-d4 I{20 20.1 100.5 66-133 <br /> 2-13romo-l-chloropropane 1120 38.3' 191.5 63-139 I <br /> 4-Bromofluorobenzene 120 y 18.6 93.0 64-136 <br /> *Matrix Interference i} <br /> I i <br /> Dispenser 45 Com?3' P200654 10 8260E Methyl tert butyl ether(MTBE) ND ug/Kg <br /> 400 Ethanol I) ND <br /> 200 tert-Butanol, ND J <br /> 10 di-Isopropyl ether(DIPE) ND <br /> 10 Ethyl tert-butyl ether(ETBE) ND <br /> 10 tert-Amyl methyl ether(TAME) ND <br /> .P I { <br /> I� <br /> Surrogate Amnt Spiked',k Amnt Rec. %Recovery QC Limit% i <br /> r 1,2-Dichloroethane-d4 120 22.1 110.5 66-133 <br /> 2-13romo-1-chloropropane �' 20 25.4 127.0 63-139 <br /> 4-Bromofluorobenzene 1f 20 18.3 91.5 64-136 <br /> 0 <br /> &UAA-1, <br /> Mario D'Onofrio 6 Donna Keller � <br /> Chemist Certification #1157 ' Laboratory Director) <br />