Wash. Admin. Code § 246-390-030
To be certified to analyze drinking water samples, a lab shall:
[Statutory Authority: RCW 43.20.050 and 70.119A.080. WSR 18-09-048, § 246-390-030, filed 4/13/18, effective 5/14/18. Statutory Authority: RCW 43.20.050. WSR 92-15-152 (Order 290B), § 246-390-030, filed 7/22/92, effective 8/22/92.]