Section 327IAC6.1-7-2. Pollutant-bearing water application on land with a high potential for public exposure

   (a) Pollutant-bearing water applied to land with a high potential for public exposure must be treated by subdivisions (1) and (2) in the following order before being applied to the land:

(1) Secondary treatment and any additional treatment necessary to produce effluent in which both BOD is less than or equal to ten (10) milligrams per liter and suspended solids do not exceed five (5) milligrams per liter and that must include:

(A) activated sludge processes;

(B) trickling filters;

(C) rotating biological contactors;

(D) stabilization pond systems; or

(E) other secondary treatment approved by the commissioner in the permit.

(2) For domestic wastewater, disinfection by:

(A) chlorination;

(B) ozonation;

(C) chemical disinfectants;

(D) UV irradiation;

(E) membrane processes; or

(F) other processes approved by the commissioner in the permit.

  (b) Pollutant-bearing water to be applied to land with a high potential for public exposure must meet the following water quality criteria at the time of application:

(1) The pH must be between 6 and 9 standard units.

(2) The BOD must be less than or equal to ten (10) milligrams per liter as determined from the five (5) day BOD test.

(3) For domestic wastewater, suspended solids must not exceed five (5) milligrams per liter averaged over a twenty-four (24) hour period prior to disinfection.

(4) For domestic wastewater, analysis for fecal coliform using Part 9221 E* or Part 9222 D* must include the following:

(A) Using values determined from the bacteriological results of the last seven (7) days for which analyses have been completed:

(i) no detectable fecal coliform is found using the median value; and

(ii) the number of fecal coliform organisms must not exceed fourteen (14) per one hundred (100) milliliters in any sample.

(B) Analysis must be completed using one (1) of the following:

(i) Membrane filter technique.

(ii) Fermentation tube technique.

(5) If chlorination is used as the means of disinfection, the total chlorine residual after a minimum contact time of thirty (30) minutes must be at least one (1) milligram per liter.

(6) All applicable permit conditions.

  (c) Monitoring for pollutant-bearing water to be applied to land with a high potential for public exposure must be completed no less frequently than the following:

(1) pH must be monitored at least weekly.

(2) BOD must be monitored at least weekly.

(3) For domestic wastewater, suspended solids must be monitored daily.

(4) For domestic wastewater, coliform must be monitored daily.

(5) For domestic wastewater, residual chlorine must be monitored daily.

(6) Pollutants listed in Table 10 in section 1(d) of this rule must be monitored at least annually prior to initiation of land application.

(7) Monitoring at least monthly is required for the following:

(A) Total nitrogen.

(B) Ammonia nitrogen.

(C) Nitrate nitrogen.

(D) Phosphorus.

(E) Potassium.

(8) PCBs must be monitored at least annually.

  *Part 9221 E and Part 9222 D 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. This method is 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 6.1-7-2; filed May 15, 1998, 10:20 a.m.: 21 IR 3805; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR 1518; filed Jul 7, 2003, 4:25 p.m.: 26 IR 3622; 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)