WAC 246-291-300   General monitoring requirements.  (1) The department may require additional monitoring when it determines contamination is present or suspected in the water system or when it determines the source may be vulnerable to contamination.

     (2) Special purpose samples shall not count toward fulfillment of the monitoring requirements of this chapter.

     (3) The owner shall ensure samples required by this chapter are collected, transported, and submitted for analysis according to department-approved methods. The analyses shall be performed by the state public health laboratory or another laboratory certified by the department. Qualified water utility, certified laboratory, or department personnel may conduct measurements for pH, temperature, residual disinfectant concentration and turbidity as required by this chapter, provided, these measurements are made in accordance with Standard Methods.

     (4) When one Group B water system sells water to another public water system and the cumulative number of services or population served meet the definition of a Group A system, the owner of the selling system shall ensure that source monitoring is conducted in accordance with the minimum requirements for Group A community systems found in chapter 246-290 WAC.



[Statutory Authority: RCW 43.20.050. 94-14-002, § 246-291-300, filed 6/22/94, effective 7/23/94.]