Florida Administrative Code › 62 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 62 - Departmental › Chapter 62-640 - BIOSOLIDS › Section 62-640.500 - Nutrient Management Plan (NMP)

Current through Reg. 50, No. 138; July 16, 2024
(1) A
				site-specific NMP shall be submitted to the Department with the permit
				application for an agricultural site. For sites enrolled and participating in a
				Florida Department of Agriculture and Consumer Services (FDACS) Best Management
				Practices (BMP) program, a conservation plan or NMP prepared for the purposes
				of the BMP can be submitted as the site-specific NMP if the plan meets the NMP
				requirements given in subsections (4) through (7), below.
(2) USDA-NRCS-Florida Field Office Technical
				Guide - Nutrient Management, Code 590, November 2012, listed in paragraph
				 62-640.210(1)(l),
				F.A.C., provides technical guidance in the preparation of NMPs.
(3) The NMP shall be prepared and signed by a
				person certified by the NRCS for nutrient management planning or prepared,
				signed and sealed by a professional engineer licensed in the State of
				Florida.
(4) The NMP shall identify
				each application zone to be used at the site as identified in the Biosolids
				Site Permit Application, Form
				 62-640.210(2)(d),
				incorporated in subsection
				 62-640.210(2),
				F.A.C., effective June 21, 2021. Application zones shall be sized to facilitate
				accurate accounting of nutrient and pollutant loadings and shall be in
				accordance with Rule  62-640.700, F.A.C., as
				applicable for the class(es) of biosolids that will be applied to the
				site.
(5) The NMP shall meet the
				requirements of this chapter and shall:
(a)
				Include aerial site photograph(s)/imagery or site map(s), and a soil survey map
				of the site;
(b) Include guidance
				for NMP implementation, site operation, maintenance, and
				recordkeeping;
(c) Include a
				description of how the NMP complies with any applicable basin management action
				plans (BMAPs) adopted under Section
				 403.067(7),
				F.S., and with any applicable reasonable assurance plans (RAPs) adopted under
				Section  403.067(4),
				F.S.
(d) Include results of soil,
				water, plant tissue, and biosolids analyses, as applicable. The soil fertility
				testing used to develop the NMP shall be less than one year old;
(e) Specify the frequency interval for soil
				fertility testing. The interval shall be at least once annually;
(f) Establish specific rates of application
				of biosolids based on nitrogen and phosphorus as well as procedures to land
				apply biosolids and all other nutrient sources to each application zone. The
				NMP shall address application rates for the period covered by the effective and
				expiration dates of the biosolids site permit, at a minimum. The final rate of
				biosolids to be applied to an application zone shall be not exceed the
				nitrogen-based rate and the phosphorus-based rate (the application rate shall
				not exceed the more restrictive of the two nutrient-based rates). The applicant
				may exceed the phosphorus-based rate if the applicant demonstrates the zone is
				comprised of native phosphatic soils and that applying at a higher rate is
				protective of water quality. As part of establishing the nitrogen and
				phosphorus-based application rates, the NMP shall include the following items.
1. The NMP shall identify the recommended
				crop nutrient needs for nitrogen and phosphorus (i.e. crop nutrient demand) for
				the crops to be grown on each application zone based on University of Florida
				Institute of Food and Agricultural Sciences (IFAS) recommendations or using the
				following values as a guide,
Crop
Nitrogen: lbs/acre/growing season
Phophorus
							 (P2O5): lbs/acre/growing
							 season
Improved perennial grasses (i.e. maintenance
							 fertilization of established pastures) - Grazed
160
40
Improved perennial grasses (i.e. maintenance
							 fertilization of established hayfields) - Hay or silage (assuming 4
							 harvests)
320
80
Cool season annual grasses (e.g. grazed small grains,
							 ryegrass, fescue)
160
80
Warm season annual grasses (e.g. sorghum-sudan hydrid
							 or pearl millet) - Grazed
160
40
Warm season annual grasses (e.g. sorghum-sudan hydrid
							 or pearl millet) - Hay or silage (4 harvests)
320
80
2.
				The NMP shall identify the current and planned plant production sequence or
				crop rotation for each application zone for the period of the biosolids site
				permit, at a minimum.
3. The NMP
				shall include realistic annual yield goals for each crop identified for each
				application zone, if applicable.
4.
				The NMP shall include the soil phosphorus storage "capacity index" (CI) and
				soil phosphorus results from the most recent soil fertility testing for each
				application zone. The CI and soil phosphorus results shall be based on
				Mehlich-3 extraction results for phosphorus, iron, and aluminum.
5. The NMP shall include a listing and
				quantification of all nutrient sources for each application zone.
6. The NMP shall include the percent water
				extractable phosphorus (PWEP) of each anticipated biosolids source (permittees
				may use a weighted average or estimated weighted average when biosolids applied
				to an application zone will be from multiple sources),
7. The crop nutrient demand phosphorus may be
				adjusted as given in a. and b. below, based on the soil phosphorus storage
				capacity index and the biosolids percent water extractable phosphorus (PWEP)
				when determining biosolids application rates. The adjustment to the crop
				nutrient demand phosphorus results in the amount of total phosphorus in
				lbs/acre that can be applied from biosolids (e.g., if doubling is allowed, a
				crop nutrient demand of 40 lbs
				P2O5/acre/year results in an
				allowed loading of 80 lbs total
				P2O5/acre/year).
a. When the PWEP of biosolids is less than
				14%, one of the following may be used:
(I)
				When the soil phosphorus storage capacity index for an application zone is
				greater than 40 mg/kg, the PWEP value for the biosolids being applied may be
				used to adjust the crop nutrient demand phosphorus by dividing the crop
				nutrient demand phosphorus by the PWEP (in decimal form) to determine the total
				amount of phosphorus allowed to be applied.
(II) When the soil phosphorus storage
				capacity index is at least 20 mg/kg and up to 40 mg/kg, the amount of crop
				nutrient demand phosphorus may be doubled to determine the total amount of
				phosphorus allowed to be applied.
(III) When soil phosphorus storage capacity
				index is greater than 0 mg/kg but less than 20 mg/kg, the amount of crop
				nutrient demand phosphorus may be increased by 50 percent to determine the
				total amount of phosphorus allowed to be applied.
(IV) When the soil phosphorus capacity index
				is less than 0 mg/kg, the amount of phosphorus shall not be adjusted (i.e. the
				crop nutrient demand phosphorus equals the total amount of phosphorus allowed
				to be applied).
b. When
				the PWEP of biosolids is 14% or greater, the amount of phosphorus shall not be
				adjusted unless the the soil phosphorus storage capacity index is greater than
				40 mg/kg, in which case the crop nutrient demand phosphorus may be increased by
				50 percent to determine the amount of total phosphorus allowed to be
				applied.
8. When
				considering the availability of nitrogen in biosolids, once the amount of plant
				available nitrogen (PAN) to be supplied by biosolids has been determined (i.e.
				the crop nitrogen demand has been adjusted to take other sources of nitrogen
				into account), this amount may be multiplied by a factor of 1.5 (i.e. a 50
				percent increase) to determine the amount of total nitrogen (TN) that may be
				supplied by biosolids. For example, if the crop nitrogen demand is 160 lbs PAN
				per acre per year and no other sources of nitrogen are applied, 240 lbs TN can
				be applied per acre per year by biosolids.
9. The calcium carbonate equivalency of any
				alkaline-treated biosolids and recommended lime application rates for each
				application zone,
10. Septage
				application rates for application zones with a soil capacity greater than 0
				mg/kg shall be no more than 30, 000 gallons per acre per year for septage
				containing food establishment sludge or no more than 40, 000 gallons per acre
				per year for septage not containing food establishment sludge. Septage
				application rates for application zones with a soil phosphorus storage capacity
				index less than 0 mg/kg shall be no more than 12, 000 gallons per acre per
				year. If septage is dewatered, these application rates shall be converted using
				the results of total solids monitoring of the dewatered septage.
11. The method of land application for each
				application zone; and,
12. The
				methodology and calculations used to determine the application rates for each
				application zone.