N.Y. Comp. Codes R. & Regs. tit. 6, § 222.6 – Recordkeeping.

(a) The department may enter a facility during normal operating hours to inspect an economic dispatch source subject to the requirements of this Part, and any records, papers, log books, and operational data maintained pursuant to this Part. Upon request, all records, papers, log books and operational data maintained pursuant to this Part must be made available to the department.
(b) Emission test results must be maintained at a facility for five years from the date of the emission test.
(c) The following operational data must be recorded for each economic dispatch source subject to this Part in a format acceptable to the department. The following data must be recorded monthly and maintained at the facility for five years from the date the data were recorded:
1. (1) hours of operation;
2. (2) type and quantity of fuel(s) used or purchased; and
3. (3) electricity generated by economic dispatch source in kilowatt-hours.