Section 327IAC6.1-4-15. Vector attraction reduction requirements

   (a) One (1) of the vector attraction reduction requirements in subsection (b) or an equivalent vector attraction reduction method as approved by the commissioner on the recommendation of the U.S. EPA must be met when biosolid is applied to any land application site.

  (b) The following is a list of alternative vector attraction reduction requirements for a biosolid applied to the land:

(1) The mass of volatile solids in the biosolid is reduced by a minimum of thirty-eight percent (38%) as determined using EPA-625/R-92/013*.

(2) When the thirty-eight percent (38%) volatile solids reduction requirement in subdivision (1) cannot be met for an anaerobically digested biosolid, vector attraction reduction is demonstrated by digesting a portion of the previously digested biosolid anaerobically in the laboratory in a bench-scale unit for forty (40) additional days at a temperature between thirty degrees Celsius (30°C) and thirty-seven degrees Celsius (37°C). When, at the end of the forty (40) days, the volatile solids in the biosolid at the beginning of that period is reduced by less than seventeen percent (17%), vector attraction reduction is achieved.

(3) When the thirty-eight percent (38%) volatile solids reduction requirement in subdivision (1) cannot be met for an aerobically digested biosolid, vector attraction reduction is demonstrated by digesting a portion of the previously digested biosolid that has a percent total solids of two percent (2%) or less aerobically in the laboratory in a bench-scale unit for thirty (30) additional days at twenty degrees Celsius (20°C). When, at the end of the thirty (30) days, the volatile solids in the biosolid at the beginning of that period is reduced by less than fifteen percent (15%), vector attraction reduction is achieved.

(4) The specific oxygen uptake rate (SOUR) as determined using Part 2710 B* for a biosolid treated in an aerobic process is equal to or less than one and one-half (1.5) milligrams of oxygen per hour per gram of total solids at a temperature of twenty degrees Celsius (20°C).

(5) A biosolid is treated in an aerobic process for fourteen (14) days or longer. During that time, the temperature of the biosolid must be higher than forty degrees Celsius (40°C) and the average temperature of the biosolid must be higher than forty-five degrees Celsius (45°C).

(6) The pH of a biosolid is raised to 12 or higher by alkali addition and, without the addition of more alkali, must remain at 12 or higher for two (2) hours and then at 11.5 or higher at the time the biosolid is applied to the land or distributed in a marketing and distribution program under 327 IAC 6.1-5.

(7) The percent total solids of a biosolid that does not contain unstabilized solids generated in a primary wastewater treatment process is equal to or greater than seventy-five percent (75%) at the time the biosolid is applied to the land or distributed in a marketing and distribution program under 327 IAC 6.1-5.

(8) The percent total solids of a biosolid that contains unstabilized solids generated in a primary wastewater treatment process is equal to or greater than ninety percent (90%) at the time the biosolid is applied to the land or distributed in a marketing and distribution program under 327 IAC 6.1-5.

(9) A biosolid injected below the surface of the land must:

(A) have no significant amount of the biosolid present on the land surface within one (1) hour after the biosolid is injected; and

(B) when the biosolid is Class A under section 13(b) of this rule, with respect to pathogens, be injected below the land surface within eight (8) hours after being discharged from the pathogen treatment process.

(10) A biosolid applied to the land surface must:

(A) unless otherwise approved by the commissioner, be incorporated into the soil within six (6) hours after application to or placement on the land; and

(B) when a biosolid is Class A under section 13(b) of this rule, with respect to pathogens, must be applied to or placed on the land within eight (8) hours after being discharged from the pathogen treatment process.

  (c) For purposes of subsection (b)(6), the pH of biosolid must be measured at twenty-five degrees Celsius (25°C) or measured at another temperature and then converted to an equivalent value at twenty-five degrees Celsius (25°C).

  *Methods referenced in this section may be obtained as follows:

(1) EPA-625/R-92/013, "Environmental Regulations and Technology─Control of Pathogens and Vectors in Sewage Sludge", is available from U.S. Environmental Protection Agency, Cincinnati, Ohio, 1992.

(2) Part 2710 B may be found in "Standard Methods for the Examination of Water and Wastewater", 18th Edition, 1992, available from American Public Health Association, 1015 15th Street, N.W., Washington, D.C. 20005.

These methods are also available for copying at the Indiana Department of Environmental Management, Office of Land Quality, 100 North Senate Avenue, Room N1154, Indianapolis, Indiana 46204. (Water Pollution Control Division; 327 IAC 6.1-4-15; filed May 15, 1998, 10:20 a.m.: 21 IR 3799; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR 1518; errata filed Feb 6, 2006, 11:15 a.m.: 29 IR 1937; readopted filed Nov 21, 2007, 1:16 p.m.: 20071219-IR-327070553BFA; readopted filed Jul 29, 2013, 9:21 a.m.: 20130828-IR-327130176BFA)