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COLUMBIA ANALYTICAL SERVICES,INC. <br /> Client: Shaw Environmental vironmental&Infrastructure,Inc. Service Request No.: P0600138 <br /> Project: Harney Lane Landfill,San Joaquin County Date Received: 10/19/06 <br /> Sample Matrix: Aqueous <br /> CASE NARRATIVE <br /> All analyses were e performed consistent with the quality assurance program of Columbia Analytical Services,Inc. <br /> (CAS).This report contains analytical results for samples designated for Tier 11 data deliverables. <br /> Sample Receipt <br /> eceint <br /> Four aqueous samples were received for analysis at Columbia Analytical Services on 10/19/06. <br /> No discrepancies were noted upon initial sample inspection. The samples were received in good condition and <br /> consistent with the accompanying chain of custody form. The samples were stored in a refrigerator at 4°C upon <br /> receipt at the laboratory. <br /> General Chemistry Parameters(2320 160.1,351.2) <br /> Sample MW-1 required dilution for Alkalinity due to the presence of elevated levels of matrix interferences. The <br /> reporting limits are adjusted to reflect the dilution. <br /> Approved by: Date: — �� _ <br /> 36 6 <br />