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• Field Methods and Procedures Enclosure D <br /> Page 7 <br /> received until the sample is exhausted. Once at the laboratory, the samples will be handled in <br /> accordance with U.S. Environmental Protection Agency SW-846 Test Methods for Evaluating Solid <br /> • Waste Physical/Chemical Methods Third Edition, for the intended analyses. All data sheets, <br /> chromatographs, and laboratory records will be filed as part of the permanent documentation. <br /> F.3 Corrections to Documentation <br /> Original data recorded in field notebooks,chain-of-custody records,sampling information sheets,and <br /> • other forms should be written in ink. These documents should not be altered,destroyed,or discarded <br /> even if they are illegible or contain inaccuracies that require a replacement document. <br /> If an error is made or found on a document, the individual making the corrections will do so by <br /> crossing a single line through the error,entering the correct information,and initialing and dating the <br /> change. The erroneous information will be obliterated. Any subsequent error(s) discovered on a <br /> • document will be corrected. All corrections will be initialed and dated. <br /> F.4 Sample Storage and Disposal <br /> The analytical laboratory should retain samples and extracts for 60 days after the laboratory issues a <br /> written report. Unless notified by the program manager, excess or unused samples should be <br /> • disposed of by the laboratory in an appropriate manner consistent with applicable government <br /> regulations. <br /> • <br /> • <br /> • <br /> • <br /> • <br /> • <br />