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kwvi <br /> Roy F. Weston, Inc . - Stockton Laboratory <br /> Case Narrative <br /> Client: YAMADA "BROTHERS INC. Project #:W90138 <br /> LP # : 11618 <br /> Volatiles Case lNarrative <br /> BTEX Analysis : <br /> This narrative covers the analysis of one sample. <br /> The analytical holding time for this analysis was met. <br /> Surrogate :recoveries were within acceptable limits . <br /> Spike recoveries were within acceptable limits, with the <br /> exception "of Benzene which was high. The RPD' s for the <br /> spikes were within acceptable limits . <br /> The method blank asIsociated with this group of samples was <br /> free from 'target analyte interferences at, or above, the. <br /> reporting limits . <br /> Initial . calibration was high due to an increase in the <br /> instrument' sensitivity. <br /> Continuing calibration criteria was met for this analysis <br /> with the exception of Benzene and m-Xylene. which had high <br /> recoveries . <br /> TVH analysis: <br /> 1 . This narrative covers the analysis of one ( 1) water. <br /> 2 . All required hold times have been met. <br /> 3 . Initial calibration criteria has been met for this <br /> analysis . <br /> 4 . Continuing calibration criteria has been met for this f <br /> analysis . <br /> 5 . The method blank associated with this group of samples <br /> were free of target analyte interferences at, or above, the <br /> rgporting 'limits. <br /> 6 . There was no surrogate used in this analysis. <br /> 7 . Spike recoveries. were within acceptable limits . <br /> 4 <br /> ii <br /> G. Adams Date <br /> Unit Leader <br /> s <br /> M <br /> f <br />