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A-6 <br /> Evaluating Solid Waste Physical/Chemical Methods Third Edition, for the intended analyses <br /> All data sheets, chromatographs, and laboratory records were filed as part of the permanent <br /> documentation <br /> 4.3 Corrections to Documentation <br /> Original data recorded in field notebooks, chain-of-custody records, and other forms were <br /> written in ink These documents should not be altered, destroyed, or discarded, even if they <br /> were illegible or contain inaccuracies that require a replacement document <br /> If an error was made or found on a document, the individual making the corrections did so by <br /> crossing a single line through the error, entering the correct information, and initialing and <br /> dating the change Any subsequent error(s) discovered on a document was corrected All <br /> corrections were initialed and dated <br /> 4.4 Sample Storage and Disposal <br /> Samples and extracts were retained by the analytical laboratory for 60 days after a written report <br /> was issued by the laboratory Unless notified by the program manager, excess or unused <br /> samples were disposed of by the laboratory in an appropriate manner consistent with applicable <br /> government regulations <br />