WAC 246-291-320   Bacteriological.  (1) Owners shall ensure the collection and submittal of a sample for coliform analysis at least once every twelve months from the furthest end of the distribution system or as directed by the department.

     (2) When coliform bacteria are present in any sample the owner shall ensure that:

     (a) The sample is analyzed for fecal coliform or E. coli;

     (b) The department is notified in accordance with WAC 246-291-260; and

     (c) Further action is taken as directed by the department.

     (3) MCLs.

     (a) MCLs under this subsection shall be considered primary standards.

     (b) An MCL violation for coliform bacteria occurs when a routine and repeat sample have coliform presence.

     (c) In determining MCL compliance, the owner shall:

     (i) Include:

     (A) Routine samples; and

     (B) Repeat samples.

     (ii) Not include:

     (A) Invalidated samples; and

     (B) Special purpose samples.



[Statutory Authority: RCW 43.20.050. 94-14-002, § 246-291-320, filed 6/22/94, effective 7/23/94.]