Section NR 274.151 - Cyanide(1) Periodic analyses for cyanide are not required when both of the following conditions are met: (a) The first wastewater sample taken in the calendar year has been analyzed and found to contain less than 0.7 % mg/l cyanide; and(b) The owner or operator certifies in writing to the department or control authority that cyanide is neither generated nor used in the manufacturing process.Wis. Admin. Code Department of Natural Resources NR 274.151
Cr. Register, March, 1991, No. 423, eff. 4-1-91.