Current through September 21, 2024
(a) Manure slurries
and sludges shall not be applied where the land slope exceeds five (5) percent
or the yearly soil loss is greater than five (5) tons per acre as determined by
the Universal Soil Loss Equation or in any manner that will allow surface
runoff to transport animal waste from the application site.
(b) The minimum depth of unsaturated soil
strata on which a land application system may be developed is four (4)
feet.
(c) All land application
sites shall be protected from up slope runoff by diversion ditches capable of
intercepting the overland flow from a 25-year 24-hour storm event. Diversion
ditches are not required if it can be shown that a storm of this size will not
have an impact on the site.
(d)
Pathogen controls.
(i) Spray irrigation
application shall not leave the property used as the land application
site.
(ii) Manure slurries and
sludges shall be applied only to lands with a very low potential for public
access.
(iii) Public access to all
application sites shall be restricted by signing at points of potential public
access. The access restriction shall apply one (1) year after the application
of manure slurries.
(iv) Crops
shall not be harvested for ninety (90) days after the application of manure
slurries and sludges.
(v) Direct
human consumption crops, which are consumed fresh, shall not be harvested for
one year after the application of manure slurries and sludges.
(vi) Turf grass or sod grown on land where
manure slurries or sludges are applied shall not be harvested for one year
after application of liquid animal wastes.
(e) Buffer zones shall be required to protect
the public from exposure to pathogens or odors that might be present in manure
slurries or sludges.
(i) A buffer zone of
one-fourth (1/4) mile is required between a land application site and any
building with human occupancy or area of public use, not including public
roadways.
(ii) Manure slurries or
sludges shall not leave the property where they are applied.
(iii) Manure slurries or sludges shall not be
land applied within 200 feet of a perennial, intermittent, or ephemeral water
body or water well permitted for current domestic purposes.
(f) Method of application.
(i) Manure slurries and sludges shall be
evenly distributed over application sites at a rate that shall not exceed the
agronomic rate and at a rate that shall not result in any surface runoff from
the site.
(ii) Land application of
manure slurries and sludges shall not be undertaken when soil is saturated,
frozen, or covered with ice or snow or immediately before or during a storm
event.
(iii) Sprinkler type land
application systems shall be equipped with a backflow prevention device to
protect any water source or well connected to the system. The required level of
protection is a reduced-pressure principal backflow prevention device or air
gap. All devices must be approved by the Foundation for Cross-Connection
Control, University of Southern California.
(iv) All manure slurries and sludges shall be
injected or incorporated within six (6) hours after application.
(g) Metals. Sludges shall not be
land applied if the metals concentrations exceed the ceiling pollutant levels
established by Chapter 11, Part E, Section 48 of these regulations.
