Section 18 AAC 80.820 - Invalidation of samples in which fecal indicators are not detected(a) If performing a fecal indicator analysis conducted for purposes of a public water system's compliance with 40 C.F.R. 141.400 - 141.405, adopted by reference in 18 AAC 80.010(a), a certified laboratory shall invalidate a sample in which fecal indicators are not detected if the sample produces(1) a turbid culture in the absence of gas production using an analytical method where gas formation is examined;(2) a turbid culture in the absence of an acid reaction in the presence-absence coliform test; or(3) confluent growth or colonies too numerous to count with an analytical method using a membrane filter.(b) If a certified laboratory invalidates a sample under (a) of this section, the laboratory shall notify the department and the owner by telephone or facsimile transmission no later than 24 hours after invalidating the sample. The operator shall collect another sample from the same location as the original sample no later than 24 hours after being notified of the invalidation, and shall have the new sample analyzed for the presence of fecal indicators. If the laboratory invalidates the new sample or a subsequent sample, the operator shall continue to re-sample no later than 24 hours after receiving notification of the invalidation, and shall have the samples analyzed until a valid result is obtained. The department will waive the 24-hour time limit if the department determines that public health is adequately protected.Eff. 5/20/2011, Register 198Authority:AS 46.03.020
AS 46.03.050
AS 46.03.710
AS 46.03.720