All samples and other tangible evidence should be maintained in proper custody until disposition or until the samples are dispatched to a laboratory for analysis. A record of sample number, source of sample, time, date, and name of person taking the sample and each person handling the sample will be kept with the sample on a chain of custody record until the sample is delivered to the laboratory. (Placing a sample addressed to the laboratory in the U.S. mail constitutes delivery to the laboratory.) Upon delivery to the laboratory, the chain of custody record should be immediately submitted to the city s water pollution control office, attached to a signed and dated memorandum of transmittal.
(Prior Code, § 16-107; Ord. No. 96-83, 12-13-1983; Ord. of 9-22-1992)