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American £rivaronmerital Network <br /> PAGE 12 <br /> QUALITY CONTROL DATA <br /> METHOD EPA 8240 <br /> AEN JOB NO 9701226 <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-d, Toluene-de benzene <br /> 02/03/97 MW-2 02 105 88 94 <br /> QC Limits 76-114 88-110 86-115 <br /> • DATE ANALYZED 02/04/97 <br /> SAMPLE SPICED 9701260-01 <br /> INSTRUMENT 13 <br /> Matrix Spike Recovery Summary <br /> QC Limits <br /> Spike <br /> Added Percent Percent <br /> Analyte (ug/L) Recovery RPD Recovery RPD <br /> 1 , 1-Dichloroethene 50 111 6 59-155 25 <br /> Trichloroethene 50 95 3 71-157 25 <br /> Benzene 50 106 6 37-151 25 <br /> Toluene 50 98 1 47-150 25 <br /> Chlorobenzene 50 100 2 37-160 25 <br /> Daily method blanks for all associated analytical runs showed no contamination <br /> at or above the reporting limit <br /> . *** END OF REPORT <br />