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.