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UNC Chapel Hill Permit <br /> c. Sample preparation methods; <br /> d. Analytical Procedures, including: <br /> i. Scope and application of the procedure; <br /> ii. Sample matrix; <br /> iii. Potential interferences; <br /> iv. Precision and accuracy of the methodology; and <br /> v. Method detection limits. <br /> e. Calibration procedures and frequency; <br /> f. Data reduction, validation and reporting; <br /> g. Internal quality control checks, laboratory performance and systems audits and <br /> frequency, including: <br /> i. Method blank(s); <br /> ii. Laboratory control sample(s); <br /> iii. Calibration check sample(s); <br /> iv. Replicate sample(s); <br /> v. Matrix-spiked sample(s); <br /> vi. Control charts; <br /> vii. Surrogate samples; <br /> viii. Zero and span gases; and <br /> ix. Reagent quality control checks. <br /> h. Preventative maintenance procedures and schedules; <br /> i. Corrective action(for laboratory problems); and <br /> j. Turnaround time. <br /> C. Data Management Plan <br /> The Permittee shall develop and initiate a Data Management Plan to track investigation data <br /> and results. This plan shall identify and set up data documentation materials and procedures, <br /> project file requirements, and project-related progress reporting procedures and documents. <br /> The plan shall also provide the format to be used to present the raw data and conclusions of <br /> the investigation. <br /> 1. Data Record <br /> The data record shall include the following: <br /> a. Unique sample or field measurement code; <br /> b. Sampling or field measurement location and sample or measurement type; <br /> B-4 <br />