N.Y. Comp. Codes R. & Regs. tit. 6, § 257-3.4
(a) During any 12 consecutive months, 50 percent of the values of the 30 day average concentrations shall not exceed:
| Level I | 0.30 mg/cm2/mo | Level III | 0.40 mg/cm2/mo |
| Level II | 0.30 mg/cm2/mo | Level IV | 0.60 mg/cm2/mo |
(b) During any 12 consecutive months, 84 percent of the values of the 30-day average concentrations shall not exceed:
| Level I | 0.45 mg/cm2/mo | Level III | 0.60 mg/cm4/mo |
| Level II | 0.45 mg/cm3/mo | Level IV | 0.90 mg/cm2/mo |