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<br />May 20, 1996 <br />Table 2 Page 2 <br /> <br />ERM Project 1/961019.0 <br />ECS Project 11ERM210 <br />QUALITY CONTROL RESULTS <br /> Surrogate <br />Recovery <br />Benzene <br />Toluene Ethyl- <br />benzene <br />Xylene <br />LCS Spike <br />Recovery 91 <br />- 0.094 <br />94 0.092 <br />92 0.091 <br />91 0.27 <br />90 <br />Matrix Spike <br />Recovery 93 <br />- 0.10 <br />100 0.097 <br />97 0.096 <br />96 0.29 <br />95 <br />Matrix Spike Duplicate <br />Recovery 94 <br />- 0.11 <br />105 0.10 <br />103 0.10 <br />102 0.30 <br />100 <br />Spike % Difference - 5 6 6 5 <br />Blank 94 ND ND ND ND <br />Detection Limit - 0.0005 0.0005 0.0005 0.002 <br />