New Mexico Administrative Code › Title 20 - ENVIRONMENTAL PROTECTION › Chapter 6 - WATER QUALITY › Part 6 - GROUND WATER PROTECTION - SUPPLEMENTAL PERMITTING REQUIREMENTS FOR DAIRY FACILITIES › Section 20.6.6.25 - ADDITIONAL MONITORING REQUIREMENTS FOR DAIRY FACILITIES WITH A LAND APPLICATION AREA

Current through Register Vol. 35, No. 13, July 16, 2024
A.
Volume of wastewater and wastewater/stormwater land applied - measurement and
				reporting.
A permittee shall measure all wastewater discharges from a
				wastewater or combination wastewater/stormwater impoundment to each fields
				within the land application area using flow meters. A permittee shall maintain
				a log recording the date and location of each discharge, flow meter readings
				immediately prior to and after each discharge, and the calculated total volume
				of each discharge reported in gallons and acre-feet. A permittee shall submit a
				copy of the log entries including units of measurement to the department in the
				quarterly monitoring reports.
B.
Volume of stormwater land applied - measurement and reporting.
A
				permittee shall measure all stormwater applications from a stormwater
				impoundment to each fields within the land application area using flow meters.
				A permittee shall maintain a log recording the date and location of each
				application, flow meter readings immediately prior to and after each
				application, and the calculated total volume of each application reported in
				gallons and acre-feet. A permittee shall submit a copy of the log entries
				including units of measurement to the department in the quarterly monitoring
				reports.
C.
Wastewater to be
				land applied - sampling and reporting.
A permittee shall collect and
				analyze wastewater samples on an annual basis for nitrate as nitrogen, total
				Kjeldahl nitrogen, chloride, total sulfur and total dissolved solids pursuant
				to Subsection B of 20.6.6.24 NMAC. Representative samples shall be collected
				from the wastewater impoundments unless an alternative method is approved for
				good cause, including safety. The representative samples shall consist of eight
				samples taken from eight different locations evenly distributed throughout the
				impoundment or using an alternative method approved by the department for good
				cause. A permittee shall submit the analytical results to the department in the
				quarterly monitoring reports.
D.
Manure solids -nitrogen content.
The nitrogen content of the
				manure solids applied to each fields within the land application area shall be
				estimated at 25 pounds of nitrogen per ton. Should a permittee choose to use
				actual nitrogen content values of on-site manure solids, the permittee shall
				collect a composite sample on an annual basis. The composite sample shall
				consist of a minimum of 30 sub-samples collected on the same day and thoroughly
				mixed. Manure samples shall be analyzed for total Kjeldahl nitrogen and
				moisture content. The permittee shall submit the analytical results to the
				department in the quarterly monitoring reports.
E.
Irrigation water - sampling, volume
				applied, and reporting.
A permittee shall monitor irrigation wells used
				to supply fresh water to the fields within the land application area to account
				for additional potential nitrogen supplied to the land application area in the
				following manner.
(1) Each irrigation well
				shall be identified in association with the fields(s) to which it supplies
				fresh water.
(2) An annual sample
				of irrigation water supplied from each well or a group of physically connected
				wells shall be collected and analyzed for nitrate as nitrogen and total
				Kjeldahl nitrogen, pursuant to Subsection B of 20.6.6.24 NMAC. If the results
				are consistent for the first five years of annual sampling, sampling frequency
				may be reduced to once every other year.
(3) The annual volume of irrigation water
				applied to each fields within the land application area shall be estimated for
				each well.
(4) The permittee shall
				submit the analytical results and the estimated annual volume of irrigation
				water applied from each well to each fields within the land application area to
				the department in the monitoring reports due by May 1.