New York Codes, Rules and Regulations › Title 6 - DEPARTMENT OF ENVIRONMENTAL CONSERVATION › Chapter X - DIVISION OF WATER RESOURCES › Subchapter A - GENERAL › Article 3 - STATE POLLUTANT DISCHARGE ELIMINATION SYSTEM › Part 750 - STATE POLLUTANT DISCHARGE ELIMINATION SYSTEM (SPDES) PERMITS › Subpart 750-2 - OPERATING IN ACCORDANCE WITH A SPDES PERMIT AND POSS REGISTRATION › Section 750-2.5 - Routine monitoring, recording, and reporting

Current through Register Vol. 46, No. 28, July 10, 2024
(a)
General.
(1) The permittee shall comply with all
						recording, reporting, monitoring and sampling requirements specified in the
						permit.
(2) Samples and
						measurements taken to meet the monitoring requirements specified in a SPDES
						permit shall be representative of the quantity and character of the monitored
						discharges. Unless otherwise specified in the permit or directed by the
						regional water engineer in writing, the following shall apply to such sample
						collection:
(i) A representative sample is one
						that adequately reflects the actual condition of the wastewater. The most
						representative sample will be drawn from a point that represents the wastewater
						discharged. When appropriate, that point should be at a depth where the flow is
						turbulent and well-mixed and the likelihood of solids settling is
						minimal.
(ii) For all parameters
						except volatile organics and oil and grease, composite samples required by a
						SPDES permit shall be composed of a minimum of eight grab samples, collected
						over the specified collection period, either at a constant sample volume for a
						constant flow interval or at a flow-proportioned sample volume for a constant
						time interval. Where continuous flow monitoring equipment is not available or
						where effluent flows do not vary more than 10 percent over the course of
						composite sample collection, composite samples may be composed of equal size
						grab samples taken at equal time intervals.
(iii) For volatile organics and oil and
						grease, composite samples required by a SPDES permit shall be collected as
						individual aliquots that must be combined in the laboratory for analysis. At
						least four (rather than eight) aliquots or grab samples should be collected
						over the specified collection period, either at a constant sample volume for a
						constant flow interval or at a flow-proportioned sample volume for a constant
						time interval. Where flow monitoring equipment is not available or where
						effluent flows do not vary more than 10 percent over the course of composite
						sample collection, composite samples may be composed of equal size grab samples
						taken at equal time intervals.
(iv)
Grab sample
means a single sample, taken over a period of time
						not exceeding 15 minutes.
(v)
						Sample collection shall be scheduled to be representative of the normal
						discharge. Representative sample collection schedules include schedules set at
						least one month prior to when the samples are to be collected. A true and
						accurate copy of the schedule shall be kept readily available for reference at
						the wastewater treatment facility and shall be provided to the department upon
						request. The schedule may only be changed for good cause including but not
						limited to sampling equipment failure and unanticipated process shutdown.
						Samples may be scheduled as follows:
(a)
						randomly;
(b) day of the week or
						month, provided that scheduling by day of week or month does not persistently
						coincide with or exclude recurrent discharges;
(c) for storm water: based on availability of
						a suitable storm water event; and
(d) any other method of scheduling that is
						representative and acceptable to the regional water engineer.
(3) Accessible sampling
						locations must be provided and maintained by the permittee. New sampling
						locations shall be provided by the permittee if existing locations are deemed
						unsuitable by the department.
(4)
						Unless otherwise specified in the permit or directed by the regional water
						engineer, actual measured values of all positive analytical results obtained
						above the method detection limit (MDL) for all monitored parameters shall be
						recorded and reported, as required by the permit.
(5) For instrumentation that is not used by a
						certified laboratory, but which is used to measure discharges to the
						environment as specified in a SPDES permit, the permittee shall periodically
						calibrate and perform maintenance procedures to ensure accuracy of
						measurements. Verification of maintenance shall be logged into the record
						book(s) of the facility. The permittee shall notify the department's regional
						office in the discharge monitoring report if any required instrumentation
						becomes inoperable. In addition, the permittee shall verify the accuracy of its
						measuring equipment to the department's regional office or its designated field
						office upon request.
(6) No person
						shall falsify, tamper with, or knowingly render inaccurate any monitoring
						device or method required to be maintained under the permit.