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' 1615 West Texas Street,Suite 2 <br /> Fairfield,CA 94553 <br /> Tal (707)434-8794 <br /> Cain Analytical Fax (707)434-8795 <br /> Laboratory Certification#1170 <br /> QUALITY CONTROL DATA REPORT <br /> ATC Associates.Inc, Client Sample ID: TP-MW-6-30.5 Lab Number 980162MS <br /> 1260 Graphics DTT Matrix; Sall Sampled, Mar 2S, 1998 <br /> Modesto,CA 95351 Analysis Method. EPA 9260 Mod. Reeewed April 9, 1998 <br /> ' <br /> Attention, Draw Van Allen Prep Method EPA 5030 Analyzed April 9,1998 <br /> CIO%pwjeat III,61596 0001101 <br /> Chant P 0 No-- DT 99004 B QC Batch Number- 80023 Reported April 13,1998 <br /> VOLATILE R <br /> O ORGANICS BY GC/MS (EPA 8260 Mod.) <br /> Matrix Spike <br /> Analyte Spike Amount Sample MS % Recovery <br /> Methyl tert-butyl ether 50 µg/l ND 45 90 <br /> Dusopropyl ether 50 µg/l ND 52 104 <br /> Ethyl tert-butyl ether 50 µg/l ND 58 116 <br /> tent-Amyl methyl ether 50 µg/l ND 54 108 <br /> Matnx Spike Duplicate <br /> ' Analyte Spike Amount Sample MSD % Recovery <br /> Methyl tert-butyl ether 50 µg/l ND 44 88 <br /> 1 Dusopropyl ether 50 µg/1 ND 47 94 <br /> Ethyl tert-butyl ether 50 µg/l ND 48 96 <br /> tert-Amyl methyl ether 50 µg/l ND 41 82 <br /> Analyte RPD RPD Limit MS/MSD Lund <br /> Methyl tert-butyl ether 1 0 -25 80 - 120 <br /> ' Dusopropyl ether 5 0 -25 80 - 120 <br /> Ethyl tert-butyl ether 9 0 -25 80 - 130 <br /> tert-Amyl methyl ether 14 0 -25 80 - 120 <br /> I, <br /> ' Analytes reported as ND were not present above the stated reporting linut <br /> ' Page 18 of 18 <br />