Section R. 323.2415 - Vector attraction reductionRule 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.Mich. Admin. Code R. 323.2415