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Enseco <br />I Sample Description <br />See the attached Sample Description Information. <br />The samples were received under chain -of -custody. <br />II Analysis Request <br />The following analytical tests were requested. <br />Lab ID Analysis Description <br />047185-1 thru 4, 8 Volatile Organics <br />Chloride, Nitrate, Total Dissolved Solids <br />ICP Scan <br />C.A.0 Metals, STLC <br />pH, Percent Water <br />-5, 6, 7 Sample Composite <br />III Quality Control <br />A. Project Specific QC. No project specific QC (i.e., spikes and/or <br />duplicates) was requested. <br />B. Method Blank Results. A method blank is a laboratory -generated <br />sample which assesses the degree to which laboratory operations <br />and procedures cause false -positive analytical results for your <br />samples. <br />No target parameters were detected in the method blanks associated <br />with your samples at the reporting limit levels noted on the data <br />sheets in the Analytical Results section. <br />C. Laboratory Control Samples - The LCS Program <br />Duplicate Control Sam 1p es. A DCS is a well -characterized matrix <br />(blank water, sand or celite) which is spiked with certain target <br />parameters and analyzed at approximately 10% of the sample load in <br />order to establish method -specific control limits. The DCS <br />results associated with your samples are on the attached Duplicate <br />Control Sample Report. <br />Single Control Samples. An SCS consists of a control matrix that <br />is spiked with surrogate compounds appropriate to the method being <br />used. In cases where no surrogate is available, (e.g. metals or <br />conventional analyses) a single control sample identical to the <br />DCS serves as the control sample. An SCS is prepared for each <br />sample lot. Accuracy is calculated identically to the DCS. The <br />SCS results associated with your samples are on the attached <br />Single Control Sample Report. <br />