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4JEq [I;+ '39tiv9 x <br /> I <br /> ROY F WESTON, INC <br /> ' STOCKTON ANALYTICAL LABORATORY <br /> ANALYTICAL CASE NARRATIVE <br /> Client WESTON ECON/EBMUD <br /> RFW# 92105019 <br /> ' Test Method 602 PURGEABLE AROMATICS <br /> 1 This narrative covers the analysis of 9 water samples in accordance with protocols <br /> based on EPA method 602 <br /> 2 The analytical holding time for the analysis was met <br /> ' 3 Continuing calibration criteria was met for this analysis with the exceptions of <br /> Ethylbenzene (-16%) and Toluene (-18%) in the second standard Results for these <br /> analytes may be biased low <br /> 4 The method blanks associated with these an samples did not contain target analytes <br /> P Y g <br /> at, or above, the reporting limits <br /> ' S Surrogate recoveries were within Laboratory QC limits with the exceptions of MW-9 <br /> g rY P <br /> (46%) which was later reanalyzed as a matrix spike and showed good recoveries, and <br /> ' also BLKSVo283-MB2 BS (134%) <br /> ' 6 Blank spike recoveries were within Laboratory QC limits with the exception of <br /> 13LKSVo283-MB2 BS which showed high recoveries of all spiked analytes <br /> ' 7 Matrix spike and RPD recoveries were within Laboratory QC limits <br /> 8 Retention times were within Laboratory QC limits <br /> /Q - <br /> Unit Leader Date <br />