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--- :.-Enseco <br /> I Samole Description <br /> See the attached Sample Description Information. <br /> The samples were received under chain-of-custody. <br /> II Anal sis Re nest <br /> The following analytical tests were requested. <br /> Lab IO Analysis Descri tion <br /> 054246-1,2 Benzene, Toluene, Ethyl Benzene, Xylenes <br /> Total Petroleum Hydrocarbons <br /> Oil S Grease <br /> -1,2,3 Cadmium, Chromium, Lead, Zinc <br /> III Quality Control <br /> A. Pro'ect S ecific C. 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 <br /> attached Method Blank Report. <br /> Repetitions of method blanks (with identical QC Lot No.s and Run <br /> No.$) have been reported but do not indicate unique <br /> determinations. <br /> C. Laboratory Control Samples - The LCS Program <br /> Duplicate Control Sam les. A DCS is a well-characterized matrix <br /> (blank water, sand or celito) 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 appropriate-surrogate compounds a to the been <br /> Pp e meg <br /> used. In cases where no surrogate- isavailable—(egg:-meta s-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 OCS. The <br /> SCS results associated with your samples are an the attached <br /> Single Control Sample Report. <br />