Authority: IC 13-13-5-1; IC 13-15-1-2; IC 13-15-2-1

Affected: IC 13-18-10

Sec. 5. (a) Spray irrigation of manure and process wastewater must be conducted to prevent equipment leaks and excessive application. Application is deemed excessive when the application rate exceeds the infiltration rate of the soil where the application is occurring.

(b) Application must be conducted:

1. (1) under the constant supervision of a person; or
2. (2) with devices to detect pressure loss due to leaks and devices to shut down the system if leaks are detected.

(c) Manure and process wastewater must not be applied by spray irrigation to any land that has less than twenty (20) inches of soil above the bedrock.

(d) Spray irrigation in a flood plain is prohibited unless the following conditions are met:

1. (1) The setback from surface water is increased to two hundred (200) feet.
2. (2) Spraying is only done during months that the NRCS soil data mart indicates have a low potential for flooding.

3. (3) There is no expectation of flooding, based on:

   1. (A) available weather forecast information; and
   2. (B) rainfall or flood conditions upstream of the land application area.

4. (4) A spray irrigation plan is completed, which must be kept in the operating record and includes the following:

   1. (A) A map of the flood plain area.
   2. (B) A timeline of when the spraying will occur.
   3. (C) A description of the methods used in subsection (b).

(Water Pollution Control Division; 327 IAC 19-14-5; filed Feb 6, 2012, 2:58 p.m.: 20120307-IR-327090615FRA, eff Jul 1, 2012; readopted filed Jun 6, 2018, 1:59 p.m.: 20180704-IR-327180171BFA; readopted filed Oct 18, 2024, 1:57 p.m.: 20241113-IR-327230810RFA)