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Enseco <br /> A Corning Company <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 /> 060557-1 thru 3 Volatile Organics <br /> fWA Total Petroleum Hydrocarbons (Gasoline) and BTEX <br /> -2 Total Petroleum Hydrocarbons, Extractable <br /> III Quality Control <br /> r <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 /> A slight amount of methylene chloride was detected in the <br /> associated method blanks for Method 8240. <br /> ti.. <br /> C. Laboratory Control Samples - The LCS Program <br /> Duplicate Control Samples. 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 Sample. 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 UCS. The <br /> SCS results associated with your samples are on the attached <br /> Single Control Sample Report. <br /> v <br />