Michigan Administrative Code › Department - Environmental Quality › Water Resources Division › Water Resources Protection › Part 24 - LAND APPLICATION OF BIOSOLIDS › Section R. 323.2415 - Vector attraction reduction

Current through Vol. 24-12, July 15, 2024
Rule 2415.
(1) A
				  person who prepares bulk biosolids for application to agricultural land, a
				  forest, a public contact site, or a reclamation site shall meet 1 of the vector
				  attraction reduction requirements in subrule (4)(a) to (h) of this rule or
				  shall meet the vector attraction reduction requirements of subrule (4)(i) or
				  (j) of this rule.
(2) A person who
				  prepares bulk biosolids for application to a lawn or a home garden shall meet 1
				  of the vector attraction reduction requirements in subrule (4)(a) to (h) of
				  this rule.
(3) A person who
				  prepares bulk biosolids that is sold or given away in a bag or other container
				  for application to the land shall meet 1 of the vector attraction reduction
				  requirements in subrule (4)(a) to (h) of this rule.
(4) All of the following provisions apply to
				  vector attraction reduction processes:
(a) A
				  generator shall reduce the mass of volatile solids in the biosolids by a
				  minimum of 38%.
(b) If the 38%
				  volatile solids reduction requirement in subdivision (a) of this subrule cannot
				  be met for an anaerobically digested biosolids, then a generator may
				  demonstrate vector attraction reduction by digesting a portion of the
				  previously digested biosolids anaerobically in the laboratory in a bench-scale
				  unit for 40 additional days at a temperature between 30 and 37 degrees Celsius.
				  When, at the end of the 40 days, the volatile solids in the biosolids at the
				  beginning of the 40-day period are reduced by less than 17%, vector attraction
				  reduction is achieved.
(c) If the
				  38% volatile solids reduction requirement in subdivision (a) of this subrule
				  cannot be met for aerobically digested biosolids, then a generator may
				  demonstrate vector attraction reduction by digesting a portion of the
				  previously digested biosolids that have a percent solids of 2% or less
				  aerobically in the laboratory in a bench-scale unit for 30 additional days at
				  20 degrees Celsius. When, at the end of the 30 days, the volatile solids in the
				  biosolids at the beginning of the 30-day period is reduced by less than 15%,
				  vector attraction reduction is achieved.
(d) A generator shall ensure that the
				  specific oxygen uptake rate (SOUR) for biosolids treated in an aerobic process
				  is equal to or less than 1.5 milligrams of oxygen per hour per gram of total
				  solids (dry weight basis) at a temperature of 20 degrees Celsius.
(e) A generator shall treat biosolids in an
				  aerobic process for 14 days or longer. During that time, a generator the
				  temperature of the biosolids shall be higher than 40 degrees Celsius and the
				  average temperature of the biosolids shall be higher than 45 degrees
				  Celsius.
(f) A generator shall
				  ensure that the pH of biosolids is raised to 12 or higher by alkali addition
				  and, without the addition of more alkali, remains at 12 or higher for 2 hours
				  and then at 11.5 or higher for an additional 22 hours.
(g) A generator shall ensure that the percent
				  solids of biosolids that do not contain unstabilized solids generated in a
				  primary wastewater treatment process is equal to or greater than 75% based on
				  the moisture content and total solids before mixing with other materials, at
				  the time the biosolids are prepared for sale or given away in a bag or other
				  container for application to the land, or at the time the biosolids are
				  prepared to meet the requirements in R 323.2407(1) or (2).
(h) A generator shall ensure that the percent
				  solids of biosolids that contains unstabilized solids generated in a primary
				  wastewater treatment process shall be equal to or greater than 90% based on the
				  moisture content and total solids before mixing with other materials, at the
				  time the biosolids are prepared for sale or given away in a bag or other
				  container for application to the land, or at the time the biosolids are
				  prepared to meet the requirements in R 323.2407(1) or (2).
(i) All of the following provisions apply to
				  biosolids that are injected:
(i) A person who
				  applies biosolids shall inject below the surface of the land.
(ii) A person who applies biosolids shall
				  ensure that a significant amount of the biosolids is not present on the land
				  surface within 1 hour after the biosolids are injected.
(iii) If the biosolids that are injected
				  below the surface of the land are class A with respect to pathogens, then a
				  person who applies the biosolids shall ensure that the biosolids are injected
				  below the land surface within 8 hours after the biosolids have been discharged
				  from the pathogen treatment process.
(j) A person who applies biosolids to the
				  land surface shall ensure that the biosolids are incorporated into the soil
				  within 6 hours after application to or placement on the land, unless otherwise
				  specified by the permitting authority. If biosolids that are incorporated into
				  the soil are class A with respect to pathogens, then the person shall apply the
				  biosolids to, or place the biosolids on, the land within 8 hours after the
				  biosolids have been discharged from the pathogen treatment process.