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s • <br /> Lot#: D6I060141 <br /> Case Narrative <br /> Enclosed is the report for two samples received at STL's Denver laboratory on September 6,2006.The <br /> results included in this report have been reviewed for compliance with Laboratory Quality Manual.The <br /> test results shown in this report meet all requirements of NELAC and any exceptions are noted below. <br /> This report may include data with reporting limits(RLs)less than STL's standard reporting limit. These <br /> data and reporting limits are being used specifically to meet the needs of this project. Note that,data are <br /> not customarily reported to these levels without qualifiers,because they are inherently less reliable and <br /> potentially less defensible than the latest industry standards require. Please contact STL's for more <br /> details. <br /> Dilution factors and footnotes have been provided to assist in the interpretation of the results. Each <br /> sample was analyzed to achieve the lowest possible reporting limit within the constraints of the method. <br /> In some cases, due to interferences or analytes present at concentrations above the linear calibration <br /> curve,samples were diluted. For diluted samples,the reporting limits are adjusted relative to the dilution <br /> required. <br /> STL utilizes USEPA approved methods in all analytical work. The samples presented in this report were <br /> analyzed for the parameters listed on the analytical methods summary page in accordance with the <br /> methods indicated. A summary of quality control parameters is provided below. <br /> This report shall not be reproduced except in full,without the written approval of the laboratory. <br /> Quality Control Summary for Lot D6I060141 <br /> Sample Receiving <br /> The cooler temperature upon receipt at the Denver laboratory was 1.7°C. <br /> One of the two sulfuric acid bottles was received broken. Sufficient volume remained for Oil&Grease <br /> analysis. All VOA vials contained approximately 5-10mm headspace. <br /> Al other sample bottles were received in acceptable condition. <br /> Holding Times <br /> The analytical parameters were performed within established holding times. <br /> Method Blanks <br /> Trace levels of the common laboratory contaminants, Acetone and Methylene chloride,as well as <br /> Toluene were detected in the Method 8260B blank associated with QC batch 6258465. Additionally, <br /> Diesel Range Organics and Specific Conductance were detected at trace levels in method blanks <br /> associated with Methods 8015B and 120.1,respectively. Because all method blank detections were less <br /> than the reporting limit,no corrective action was necessary. <br /> All other Method Blanks were within established control limits. <br /> Laboratory Control Samples (LCS) <br /> All Laboratory Control Sample results were within established control limits. <br />