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

Affected: IC 13-18-10

Sec. 1. (a) Ground water monitoring may be required when the commissioner makes a determination that the monitoring is required to protect human health and the environment. The commissioner shall make a written determination describing the basis for the need for ground water monitoring based on information provided about any of the following:

1. (1) Proximity of ground water aquifer to waste management systems.
2. (2) Soil types located at and around the proposed waste management systems.
3. (3) Site-specific factors at the location of the proposed waste management system that may elevate the potential for contamination of the ground water aquifer.

(b) The commissioner may request additional information from an owner/operator to complete the written determination in subsection (a).

(c) All CFOs required to conduct ground water monitoring must comply with the requirements of this section.

(d) Owners/operators of a manure storage facility shall develop and follow a written ground water monitoring plan. This plan must:

1. (1) be approved by the department;
2. (2) be kept in the operating record; and

3. (3) include:

   1. (A) at least the following monitoring parameters:

      1. (i) field pH;
      2. (ii) field specific conductance;
      3. (iii) nitrates;
      4. (iv) chloride;
      5. (v) fecal coliform bacteria;
      6. (vi) sulfate; and
      7. (vii) total dissolved solids;
   2. (B) monitoring frequency;
   3. (C) sample collection method and identification;
   4. (D) sample preservation and shipment, including field quality control;

   5. (E) analytical procedures, including:

      1. (i) method detection limits; and
      2. (ii) practical quantitation limits;
   6. (F) chain of custody control; and
   7. (G) a description of how the owner/operator shall determine whether there is a statistically significant increase over background values for each parameter monitored, with the exception of field pH and field specific conductance. The owner/operator shall make these statistical determinations each time the owner/operator collects samples.

(e) If the owner/operator determines under subsection (d)(3)(G) that there is a statistically significant increase for parameters at any monitoring device, the owner/operator shall notify the commissioner of this finding in writing within fourteen (14) days. The notification must indicate what parameters have shown statistically significant increases over background levels. The department may then require corrective action.

(f) Owners/operators must submit the results of ground water monitoring to the department within sixty (60) days of sampling.

(g) Required monitoring must be conducted throughout the active life of the storage facility. Ground water monitoring may be extended beyond the active life of the manure storage facility if a corrective action program is being conducted at the facility.

(Water Pollution Control Division; 327 IAC 19-10-1; 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)