South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-9 - Water Pollution Control Permits
Subchapter 61-9.504 - STANDARDS FOR THE USE OR DISPOSAL OF INDUSTRIAL SLUDGE
Part D - PATHOGENS AND VECTOR ATTRACTION REDUCTION
Section 61-9.504.D.33 - Vector attraction reduction

(1) One of the vector attraction reduction requirements in section504.33(b)(1)(b)(1) through section504.33(b)(8)(b)(8); a requirement that is equivalent to one of the vector attraction reduction requirements in section504.33(b)(1) through (b)(8)(b)(1) through (b)(8), as determined by the Department; or the vector attraction reduction requirements in section504.33(b)(9) or (b)(10)(b)(9) or (b)(10) shall be met when bulk industrial sludge is applied to agricultural land, forest, a public contact site, or a reclamation site when the industrial sludge is expected to attract vectors.

(2) One of the vector attraction reduction requirements in section504.33(b)(1)(b)(1) through section504.33(b)(8)(b)(8); or an equivalent requirement, as determined by the Department, shall be met when bulk industrial sludge is applied to a lawn or a home garden when the industrial sludge is expected to attract vectors.

(3) One of the vector attraction reduction requirements in section504.33(b)(1)(b)(1) through section504.33(b)(8)(b)(8); or an equivalent requirement, as determined by the Department, shall be met when industrial sludge is sold or given away in a bag or other container for application to the land when the industrial sludge is expected to attract vectors.

(4) [Reserved]

(5) One of the vector attraction reduction requirements in section504.33(b)(9)(b)(9), section504.33(b)(10)(b)(10), or section504.33(b)(12)(b)(12) shall be met when industrial septage is applied to agricultural land, forest, or a reclamation site when the industrial septage is expected to attract vectors.

(6) One of the vector attraction reduction requirements in section504.33(b)(1)(b)(1) through section504.33(b)(10)(b)(10) or section504.33(b)(13)(b)(13) shall be met when industrial sludge is bulk applied to agricultural land, forest, a public contact site, or a reclamation site when the industrial sludge is expected to attract vectors.

(1) The mass of volatile solids in the industrial sludge shall be reduced by a minimum of 38 percent (see calculation procedure in "Environmental Regulations and Technology-Control of Pathogens and Vector Attraction in Sewage Sludge", EPA-625/R-92/013, 1992, U.S. Environmental Protection Agency, Cincinnati, Ohio 45268).

(2) When the 38 percent volatile solids reduction requirement in section504.33(b)(1)(b)(1) cannot be met for an anaerobically digested industrial sludge, vector attraction reduction can be demonstrated by digesting a portion of the previously digested industrial sludge 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 industrial sludge at the beginning of that period is reduced by less than 17 percent, vector attraction reduction is achieved.

(3) When the 38 percent volatile solids reduction requirement in section504.33(b)(1)(b)(1) cannot be met for an aerobically digested industrial sludge, vector attraction reduction can be demonstrated by digesting a portion of the previously digested industrial sludge that has a percent solids of two percent 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 industrial sludge at the beginning of that period is reduced by less than 15 percent, vector attraction reduction is achieved.

(4) The specific oxygen uptake rate (SOUR) for industrial 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 a temperature of 20 degrees Celsius. Other values may be allowed by the Department on a case-by-case basis.

(5) Industrial sludge shall be treated in an aerobic process for 14 days or longer. During that time, the temperature of the industrial sludge shall be higher than 40 degrees Celsius and the average temperature of the industrial sludge shall be higher than 45 degrees Celsius. Other processes may be allowed by the Department on a case-by-case basis.

(6) The pH of industrial sludge shall be raised to 12 or higher by alkali addition and, without the addition of more alkali, shall remain at 12 or higher for two hours and then at 11.5 or higher for an additional 22 hours at the time the industrial sludge is used or disposed; at the time the industrial sludge is prepared for sale or given away in a bag or other container for application to the land; or at the time the industrial sludge is prepared to meet the requirements in section504.10(b), (c), (e), or (f)(b), (c), (e), or (f).

(7) The percent solids of industrial sludge that does not contain unstabilized solids generated in a primary wastewater treatment process shall be equal to or greater than 75 percent based on the moisture content and total solids prior to mixing with other materials, at the time the industrial sludge is used or disposed; at the time the industrial sludge is prepared for sale or given away in a bag or other container for application to the land; or at the time the industrial sludge is prepared to meet the requirements in section504.10(b), (c), (e), or (f)(b), (c), (e), or (f).

(8) The percent solids of industrial sludge that contains unstabilized solids generated in a primary wastewater treatment process shall be equal to or greater than 90 percent based on the moisture content and total solids prior to mixing with other materials, at the time the industrial sludge is used or disposed; at the time the industrial sludge is prepared for sale or given away in a bag or other container for application to the land; or at the time the industrial sludge is prepared to meet the requirements in section504.10(b), (c), (e), or (f)(b), (c), (e), or (f).

(9)

(10)

(11) [Reserved]

(12) The pH of industrial septage shall be raised to 12 or higher by alkali addition and, without the addition of more alkali, shall remain at 12 or higher for 30 minutes.

(13) The vector attraction reduction requirement may be met through an alternative method to be determined by the Department on a case-by-case basis.