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AWES, LLC <br />The project manager is encouraged to gather pertinent laboratory-selection information prior to extensively <br />defining analytical requirements under the project. A request may be made to a laboratory to provide a <br />qualifications package that should address the points listed above. Once the project manager has reviewed <br />the various laboratory qualifications, further specific discussions with the laboratory or laboratories should <br />take place. In addition, more than one laboratory should be considered. For large-scale investigations, <br />selection of one laboratory as a primary candidate and one or two laboratories as fall-back candidates should <br />be considered. <br />The quality of the laboratory service provided is dependent on various factors. The project manager should <br />be able to control the quality of the information (e.g., samples) provided to the laboratory. It is extremely <br />important that the project manager communicate to the laboratory all the requirements relevant to the <br />project. This includes the number of samples and their matrices, sampling schedule, parameters and <br />constituents of interest, required analytical methodologies, detection limits, holding times, deliverables, level <br />of QA/QC, and required turnaround of analytical results. <br />Field and Laboratory Quality Control <br />General <br />Quality control checks are performed to ensure that the data collected is representative and valid data. <br />Quality control checks are the mechanisms whereby the components of QA objectives ore monitored. <br />Examples of items to be considered are as follows: <br />1.Field Activities: <br />•Use of standardized checklists and field notebooks; <br />•Verification of checklist information by an independent person; <br />•Strict adherence to chain-of-custody procedures; <br />•Calibration of field devices; <br />•Collection of replicate samples; and <br />•Submission of field blanks, where appropriate. <br />2.Analytical Activities: <br />•Method blanks; <br />•Laboratory control samples: <br />•Calibration check samples; <br />•replicate samples; <br />•Matrix-spiked samples; <br />•“Blind” quality control samplers; <br />•Control charts; <br />•Surrogate samples; <br />•Zero and span gases; and <br />•Reagent quality control checks.