N.Y. Comp. Codes R. & Regs. tit. 6, § 383-10.6
(c) The associated facilities monitoring program must include provisions for sampling and analysis of the following:
(d) The permittee must, at least once a year, review the associated facilities monitoring program plan and revise it as necessary, subject to the approval of the department. At minimum, the plan must be revised when the permittee or the department determines that: