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1 <br /> W � r <br /> vL4n F 5 i J v <br /> ' ROY F WESTON, INC <br /> STOCKTON ANALYTICAL LABORATORY <br /> ' ANALYTICAL CASE NARRATIVE <br /> Client WESTON ECON/EBMUD <br /> RFW# 9210SO19 <br /> ' Test SW8015(MODIFIED)-TOTAL PURGEABLE PETROLEUM HYDROCARBONS <br /> ' 1 This narrative covers the analysis of seven (7) water samples in accordance with the <br /> protocols based on The California Luft Manual <br /> 1 ' <br /> 2 The anai}ural hold time for this analysis was met <br /> ' 3 Continuing calibration criteria was met for this analysis <br /> 4 The method blanks associated with these samples were free of target analyte <br /> interferences at, or above, the reporting limit <br /> 5 The surrogate recoveries were within Laboratory Q C Limits with the exception of <br /> ' sample MW-1, which had matrix interferences <br /> ' 6 The blank spike recoveries were within acceptable Q C criteria <br /> 7 Matrix spikes were not requested by the client <br /> ' 8 Retention times were within acceptable Q C. limits <br /> 1 <br /> 1 <br /> Unit Leader Date <br /> 1 <br />