(2)
Definitions. All terms used
in this Rule shall be interpreted in accordance with the definitions as set
forth in the Act unless otherwise defined in this Paragraph or in any other
Rules of this Chapter:
(a) "Aerobic digestion"
is the biochemical decomposition of organic matter in sewage sludge into carbon
dioxide and water by microorganisms in the presence of air.
(b) "Agricultural land" is land on which a
food crop, feed crop, or a fiber crop is grown. This includes land used as
pasture.
(c) "Agronomic rate" is
the sludge application rate based on a dry weight basis determined:
1. to provide the amount of nitrogen needed
by the food crop, feed crop, fiber crop, cover crop or vegetation grown on the
land; and
2. to minimize the amount
of nitrogen in the sewage sludge that passes below the root zone of the crop or
vegetation grown on the land to the groundwater.
(d) "Anaerobic digestion" is the biochemical
decomposition of organic matter in sewage sludge into methane gas and carbon
dioxide by microorganisms in the absence of air.
(e) "Annual pollutant loading rate" is the
maximum amount of a pollutant that may be applied to a unit area of land during
a 365-day period.
(f) "Annual
sludge application rate" is the maximum amount of sewage sludge (dry weight
basis) that may be applied to a unit area of land during a 365-day
period.
(g) "Applier" is the person
who applies bulk sewage sludge to the land.
(h) "Biosolids" means any sewage sludge, as
defined in
391-3-6-.17(2)(gg),
that fulfills all requirements under this chapter, and is used in a beneficial
manner.
(i) "Bulk sewage sludge" or
"bulk biosolids" is sewage sludge that is not sold or given away in a bag or
other container for application to the land.
(j) "Cover crop" is a temporary crop, such as
winter rye or clover, planted to protect the soil from erosion and to provide
humus or nitrogen when plowed under.
(k) "Cumulative pollutant loading rate" is
the maximum amount of an inorganic pollutant that may be applied to an area of
land.
(l) "Density of
microorganisms" is the number of microorganisms per unit mass of total solids
(dry weight) in the sewage sludge.
(m) "Domestic sewage" is water waste and
wastewater from humans or from household operations that are discharged to or
that otherwise enter a treatment works.
(n) "Dry weight basis" means calculated on
the basis of having been dried at 105 degrees Celsius until reaching a constant
mass (i.e., essentially 100 percent solids content).
(o) "Exceptional quality sludge" is sewage
sludge that meets the pollutant concentrations in
391-3-6-.17(5)
Table 3, one of the Class A pathogen requirements in
391-3-6-.17(7)(a)
and one of the vector attraction reduction requirements in
391-3-6-.17(8)(a) through
(h).
(p) "Facility" means any NPDES point source
or any other system or activity that may be regulated by the Water Protection
Branch of the EPD, including land application systems regulated under
391-3-6-.11, and industrial
pretreatment systems regulated under
391-3-6-.08.
(q) "Feed crops" are crops produced primarily
for consumption by animals.
(r)
"Fiber crops" are crops such as flax and cotton.
(s) "Food crops" are crops consumed by
humans. These include, but are not limited to, fruits, vegetables, and
tobacco.
(t) "Forest" is a tract of
land thick with trees and underbrush.
(u) "Land application" or "applied to the
land" means the spraying or spreading of sewage sludge on the land surface; the
injection of sewage sludge below the land surface; or the incorporation of
sewage sludge into the soil at agronomic rates for the purpose of soil
conditioning or fertilization of crops or vegetation grown in the
soil.
(v) "Land with a high
potential for public exposure" is land that is frequently used by the public.
This includes but is not limited to public parks, ball fields, cemeteries,
plant nurseries, turf farms, and golf courses.
(w) "Land with a low potential for public
exposure" is land that the public uses infrequently. This includes, but is not
limited to, agricultural land, forest, and a reclamation site located in an
unpopulated area.
(x) "Monthly
average" is the arithmetic mean of all measurements taken during the
month.
(y) "Other container" is
either an open or closed receptacle. This includes, but is not limited to, a
bucket, a box, a carton, and a vehicle or trailer with a load capacity of 2,200
pounds or less.
(z) "Pasture" means
land on which animals feed directly on feed crops such as legumes, grasses,
grain stubble, or stover.
(aa)
"Pathogenic organisms" are disease-causing organisms. These include, but are
not limited to, certain bacteria, protozoa, viruses, and viable helminth
ova.
(bb) "pH" means the logarithm
of the periodical of the hydrogen ion concentration.
(cc) "Pollutant" is an organic substance, an
inorganic substance, a combination of organic and inorganic substances, or a
pathogenic organism that after discharge and upon exposure, ingestion,
inhalation, or assimilation into an organism either directly from the
environment or indirectly by ingestion through the food chain, could, on the
basis of information available to the Administrator of EPA, cause death,
disease, behavioral abnormalities, cancer, genetic mutations, physiological
malfunctions (including malfunction in reproduction), or physical deformations
in either organisms or offspring of the organisms.
(dd) "Pollutant limit" is a numerical value
that describes the amount of a pollutant allowed per unit amount of sewage
sludge (e.g., milligrams per kilograms of total solids); the amount of a
pollutant that can be applied to a unit area of land (e.g., pounds per acre);
or the volume of a material that can be applied to a unit area of land (e.g.,
gallons per acre).
(ee) "Preparer"
is either the person who generates sewage sludge during the treatment of
domestic sewage or a combination of domestic sewage and industrial wastewater
in a treatment works or the person who derives a material from sewage
sludge.
(ff) "Reclamation site"
means drastically disturbed land that is reclaimed using sewage sludge or
product derived from sewage sludge. This includes, but is not limited to, strip
mines and construction sites.
(gg)
"Sewage sludge" means solid, semi-solid, or liquid residue generated during the
treatment of domestic sewage or a combination of domestic sewage and industrial
wastewater in a treatment works. Sewage sludge includes, but is not limited to
scum or solids removed in primary, secondary, or advanced wastewater treatment
processes. Sewage sludge does not include ash generated during the firing of
sewage sludge incinerator, grit and screenings generated during preliminary
treatment of domestic sewage in a treatment works, treated effluent, or
materials excluded from definition of "sewage sludge" by O.C.G.A. §
12-5-30 -.3(a)(1).
(hh) "Sludge management plan" means a
detailed plan of operation for land application of sewage sludge, or any other
method of sewage sludge disposal other than co-disposal in a permitted sanitary
landfill. The plan shall, at a minimum, comply with the regulations and any
additional requirements established by the EPD pursuant to the Federal Act
Section 405(d), the Resource Conservation and Recovery Act (RCRA), and 40 CFR
503.
(ii) "Specific oxygen uptake
rate (SOUR)" is the mass of oxygen consumed per unit time per unit mass of
total solids (dry weight basis) in the sewage sludge.
(jj) "Stockpile" means to place sewage sludge
on land in piles or in any other manner that does not constitute application to
the land as defined in
391-3-6-.17(2)(u).
(kk) "Total solids" are the materials in
sewage sludge that remain as residue when the sewage sludge is dried at 103 to
105 degrees Celsius.
(ll) "Treat or
treatment of sewage sludge" is the preparation of sewage sludge for final use
or disposal. This includes, but is not limited to, thickening, stabilization,
dewatering of sewage sludge.
(mm)
"Treatment works" is either a Federally owned, publicly owned, or privately
owned device or system used to treat, recycle or reclaim either domestic sewage
or combination of domestic sewage and industrial wastewater.
(nn) "Unstabilized solids" are organic
materials in sewage sludge that have not been treated in either an aerobic or
anaerobic treatment process.
(oo)
"Vector attraction" is the characteristic of sewage sludge that attracts
rodents, flies, mosquitos, or other organisms capable of transporting
infectious agents.
(pp) "Volatile
solids" is the amount of the total solids in sewage sludge lost when the sewage
sludge is combusted at 550 degrees Celsius in the presence of excess
air.
(qq) "Wetlands" means those
areas that are inundated or saturated by surface water or ground water at a
frequency and duration to support, and that under normal circumstances do
support, a prevalence of vegetation typically adapted for life in saturated
soil conditions. Wetlands generally include swamps, marshes, bogs, and similar
areas.
(8)
Vector Attraction Reduction.
Sewage sludge that is land applied, including sewage sludge sold or given away
in a bag or other container for application to the land, shall meet one of the
vector attraction reduction requirements contained in
391-3-6-.17(8)(a) through
(8)(h) except that bulk sewage sludge that is
applied to agricultural land, forests, public contact sites, or reclamation
sites may instead meet the vector attraction reduction requirements contained
in
391-3-6-.17(8)(i) or
(8)(j).
(a)
The mass of volatile solids in the sewage sludge shall be reduced by at least
38 percent.
(b) If the mass of
volatile solids in an anaerobically digested sewage sludge cannot be reduced by
at least 38 percent, vector attraction reduction can be demonstrated by
anaerobically digesting a portion of the previously digested sewage sludge in
the laboratory in a bench-scale unit for 40 additional days at a temperature
between 30 and 37 degrees Celsius. The volatile solids shall be measured at the
beginning and end of the forty day test period. Vector attraction reduction is
achieved when the volatile solids in the sewage sludge are reduced by less than
17 percent over the test period.
(c) If the mass of the volatile solids in an
aerobically digested sewage sludge cannot be reduced by at least 38 percent,
vector attraction reduction can be demonstrated by aerobically digesting a
portion of the previously digested sewage sludge that has a maximum of 2
percent solids in the laboratory in a bench-scale unit for thirty additional
days at 20 degrees Celsius. The volatile solids shall be measured at the
beginning and end of the thirty day test period. Vector attraction reduction is
achieved when the volatile solids in the sewage sludge are reduced by less than
15 percent over the test period.
(d) The specific oxygen uptake rate (SOUR)
for sewage sludge treated in an aerobic process shall be equal to or less than
1.5 milligrams of oxygen per hour per gram of total solids (dry weight basis)
at 20 degrees Celsius.
(e) Sewage
sludge shall be treated in an aerobic process for at least fourteen days.
During that time, the temperature of the sewage sludge shall be maintained
above 40 degrees Celsius with the average temperature above 45 degrees
Celsius.
(f) The sewage sludge pH
shall be raised to 12 standard units or higher by addition of alkaline material
and shall remain at 12 standard units or higher for two hours and then 11.5
standard units or higher for an additional 22 hours without the addition or
more alkaline material.
(g) If
sewage sludge does not contain unstabilized solids generated in a primary
wastewater treatment process, the percent solids shall be equal to or greater
than 75 percent based on the moisture content and total solids before mixing
with other materials.
(h) If sewage
sludge contains unstabilized solids generated in a primary wastewater treatment
process, the percent solids shall be equal to or greater than 90 percent based
on the moisture content and total solids before mixing with other
materials.
(i) Injection of Sewage
Sludge.
1. Sewage sludge shall be injected
below the surface of the land.
2.
No significant amount of the sewage sludge shall be percent on the land surface
within one hour after the sewage sludge is injected.
3. Class A sewage sludge shall be injected
below the land surface within eight hours after being discharged from the
pathogen treatment process.
(j) Incorporation of Sewage Sludge.
1. Sewage sludge shall be incorporated into
the soil within six hours after land application.
2. Class A sewage sludge that is to be
incorporated into the soil shall be applied to the land within eight hours
after being discharged from the pathogen treatment process.