Authority: IC 13-14-8-7; IC 13-15-1-2; IC 13-15-2-1; IC 13-18-3-1; IC 13-18-12- 4

Affected: IC 13-18-12; IC 25-31.5-4

Sec. 6. Lagoons must be constructed and maintained in accordance with the following:

1. (1) The lagoon bottom must be a minimum distance of ten (10) feet above the bedrock and four (4) feet above the water table. The depth to the water table must be determined using:

   1. (A) soil survey data established by the USDA Natural Resource Conservation Service; or
   2. (B) information obtained from a professional soil scientist registered under IC 25-31.5-4;
2. unless it can be demonstrated that the water table has been artificially lowered to four (4) feet or more from the bottom of the lagoon.
3. (2) The lagoon bottom and walls must meet the design standards in "Recommended Standards for Wastewater Facilities"*.
4. (3) The lagoon bottom must be level.
5. (4) Slopes of earthen dikes must not be steeper than 1 vertical to 3 horizontal (1:3).
6. (5) Minimum earthen dike top width must be at least eight (8) feet.
7. (6) An all-weather off-loading area with drainage to the lagoon must be provided at any point where the truck contents are off-loaded into the lagoon or receiving facilities.
8. (7) Lagoons must be constructed in a manner to prevent entry of storm water from surrounding areas.
9. (8) Lagoons must be constructed to prevent leaks and seepage and prevent spills that could enter surface waters or ground water.

*The lagoon bottom and walls design standards may be found in "Recommended Standards for Wastewater Facilities", 1990 Edition, available from Health Education Services, P.O. Box 7126, Albany, New York 12224, Chapter 90, Pond Bottom, pages 90-19 to 90-20. 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 6.1-8-6; filed May 15, 1998, 10:20 a.m.: 21 IR 3812; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR 1518; filed Jul 7, 2003, 4:25 p.m.: 26 IR 3631; errata filed Feb 6, 2006, 11:15 a.m.: 29 IR 1937; readopted filed Sep 17, 2009, 3:49 p.m.: 20091014-IR-327090595BFA; readopted filed Jul 29, 2013, 9:21 a.m.: 20130828-IR-327130176BFA; readopted filed Jun 14, 2019, 1:59 p.m.: 20190710-IR-327190246BFA; readopted filed Oct 18, 2024, 1:57 p.m.: 20241113-IR-327230810RFA)