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PAGE 40 <br /> QUALITY CONTROL DATA <br /> METHOD EPA 8240 <br /> AEN JOB NO 9609379 <br /> INSTRUMENT 13 <br /> MATRIX WATER <br /> Surrogate Standard Recovery Summary <br /> Percent Recovery <br /> Date 1 2-Dichloro- p-Bromofluoro- <br /> Analyzed Client Id Lab Id ethane-d4 Toluene-de benzene <br /> 10/03/96 TB 11 95 101 93 <br /> 10/03/96 SB-8 WATER 12 110 98 95 <br /> 10/03/96 SB-9 WATER 14 109 98 98 <br /> 10/03/96 F-BLANK 21 113 95 91 <br /> 10/03/96 SV-10 WATER 22 112 98 94 <br /> 10/03/96 DUP 23 109 99 94 <br /> QC Limits 76-114 88-110 86-115 <br /> 1 DATE ANALYZED 10/02/96 <br /> SAMPLE SPIKED 9609381-01 <br /> INSTRUMENT 13 <br /> Matrix Spike Recovery Summary <br /> QC Limits <br /> Spike Average <br /> Added Percent Percent <br /> Analyte {ug/L} Recovery RPD Recovery RPD <br /> 1 1-Dichloroethene 50 86 2 59-155 25 <br /> Trichloroethene 50 92 8 71-157 25 <br /> Benzene 50 112 6 37-151 25 <br /> Toluene 50 100 7 47-150 25 <br /> Chlorobenzene 50 107 2 37-160 25 <br /> Daily method blanks for all associated analytical runs showed no contamination <br /> at or above the reporting limit <br />