WAC 173-160-440   What are the equipment cleaning standards?  (1) When drilling in known or potential areas of contamination, steam clean the drill rig derrick and all drilling equipment on site before and after well construction. If the equipment is used to drill in radioactive areas, you must develop a decontamination plan and the department must approve that plan prior to the equipment being removed from the drill site.

     (2) All well construction materials to include casing, screen(s), and filter pack material must be free of contaminants prior to installation.



[Statutory Authority: Chapter 18.104 RCW and RCW 43.21A.080. 98-08-032 (Order 97-08), § 173-160-440, filed 3/23/98, effective 4/23/98.]