- A. The “make-up”/mixing solution shall be maintained at a pH of 12.0 or higher. The leaching solution shall be maintained at a pH of 10.5 or higher.
- B. A shift record shall be kept of pH levels and cyanide concentrations. These records shall be available upon request for inspection by the State Mine Inspector.
Historical Note
Adopted effective August 2, 1985 (Supp. 85-4). Amended effective July 6, 1993 (Supp. 93-3).