Iowa Administrative Code › Agency 567 - Environmental Protection Commission › Title VIII - Solid Waste Management and Disposal › Chapter 121 - Land Application of Wastes › Rule 567-121.6 - Permit Exemptions

Current through Register Vol. 47, No. 3, July 24, 2024
No permit is required for land application of the following
				  solid wastes under the following circumstances. (Land applications that do not
				  comply with these rules must have obtained a permit under rule
				  121.7(455B).)
(1)
Solid
				wastes.
Solid wastes (other than petroleum contaminated soil) may be
				land applied without permit if the land application does not violate the
				following:
a. Land application of sludge and
				other solid waste shall be conducted in accordance with the following criteria:
(1) The maximum application rate shall not
				exceed two tons per acre per year, measured on a dry weight basis. The maximum
				application rate shall be reduced if soil tests indicate that a two ton per
				acre per year rate would provide nutrient levels significantly in excess of
				crop nutrient requirements or would provide heavy metals concentrations in the
				soil at levels which may be detrimental to crop production or hazardous to
				human health.
(2) The sludge or
				solid waste shall be applied only to soils classified as acceptable throughout
				the top five feet of soil profile. The acceptability of a soil shall be
				determined using the following chart based on USDA soil classifications.
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(3)
				Land application sites shall have soil pH maintained between 6.5 and 8.4 for
				sludges with cadmium levels up to 15 mg/kg. The soil pH may be maintained below
				6.5 but not below 6.0 if the cadmium level is 8.0 mg/kg or the sludge has been
				stabilized to a pH of 10-12. If the soil pH is below these levels, it is
				acceptable to use agricultural lime to increase the pH to an acceptable level
				prior to land application of sludge.
(4) The department recommends that all sludge
				be injected on the contour or applied to the surface and mechanically
				incorporated into the soil as soon as possible but not later than 48 hours
				after application.
(5) If the
				sludge is applied to land on which the soil loss exceeds the soil loss limits
				established by the county soil conservation district, the sludge shall be
				injected on the contour or shall be applied to the surface and mechanically
				incorporated into soil within 48 hours of application. The sludge shall not be
				applied to ground having greater than 9 percent slope.
(6) If the sludge is applied to land subject
				to flooding more frequently than once in ten years, the sludge shall be
				injected or shall be applied to the surface and mechanically incorporated into
				the soil within 48 hours. Information on which land is subject to flooding more
				frequently than once in ten years is available from the department.
(7) Sludge application on frozen or
				snow-covered ground should be avoided. If application on frozen or snow-covered
				ground is necessary, it shall be limited to land areas of less than 5 percent
				slope.
(8) If sludge is applied
				within 200 feet of a stream, lake, sinkhole or tile line surface intake located
				downgradient of the land application site, it shall be injected or applied to
				the surface and mechanically incorporated into the soil within 48 hours of
				application.