Section 329IAC9-5-6. Further site investigations for soil and ground water cleanup

   (a) In order to determine the full extent and location of soils contaminated by the release and the presence and concentrations of dissolved product as a contaminant of the ground water, the owner and operator shall conduct a further site investigation of the release, the release site, and the surrounding area possibly affected by the release if any of the following conditions exist:

(1) Information collected and submitted under section 5.1 of this rule is incomplete or fails to define the nature and extent of contamination in the soil and ground water.

(2) There is evidence that ground water wells have been affected by the contaminant. This evidence may include any information collected during release confirmation or previous corrective action measures.

(3) Free product is found to need recovery in compliance with section 4.2 of this rule.

(4) There is evidence that contaminated soils may be in contact with ground water. This evidence may include any information collected while conducting the initial response measures or investigations required under sections 1, 2, 3.1, 4.1, and 5.1 of this rule.

(5) The commissioner requests a further site investigation based on the potential effects of contaminated soil or ground water on nearby surface water and ground water resources.

  (b) During the further site investigation the owner or operator must do the following if evidence exists that a contaminant exceeds the cleanup objectives under IC 13-12-3-2:

(1) Install a minimum of three (3) ground water monitoring wells, if at least three (3) wells were not installed during the initial site investigation under section 5.1 of this rule. Additional monitoring wells may be required to fully define the extent of contamination.

(2) Take a ground water sample from each of the monitoring wells and report the analytical results to the agency.

(3) Provide a description of the method for collecting the ground water samples.

(4) Monitoring wells must be screened across water table fluctuation and not placed in a straight line.

(5) Monitoring wells must be installed as per the requirement of the rule of the natural resources commission at 312 IAC 13-8-3.

  (c) The owner and operator shall submit the information collected under subsection (b) as soon as practicable or in accordance with a schedule established by the commissioner in the format described in section 5.1(b)(2) and 5.1(b)(3) or 5.1(c) of this rule as well as a title page that identifies the consultant performing the work, the date the report was prepared, and the following information:

(1) Hydraulic conductivity.

(2)Transmissivity.

(3) Storativity.

(4) Confined or unconfined condition.

(5) Porosity of the aquifer or aquifers involved.

(6) The average linear velocity of the ground water in the aquifer or aquifers involved.

  (d) Provide a complete discussion of effective remediation alternatives, including the following for each alternative:

(1) Overall effectiveness of technology.

(2) Ability to achieve cleanup criteria.

(3) Expected treatment duration.

(4) Treatment reliability.

(5) Permits that will be required.

  (e) The approval of a further site investigation or initial site characterization under section 5.1 of this rule is not a determination that the actual costs incurred performing these site characterization activities are reimbursable costs under the rules of the underground storage tank financial assurance board at 328 IAC 1. (Solid Waste Management Division; 329 IAC 9-5-6; filed Dec 1, 1992, 5:00 p.m.: 16 IR 1072; filed Jul 19, 1999, 12:00 p.m.: 22 IR 3712; readopted filed Jan 10, 2001, 3:25 p.m.: 24 IR 1535; filed Aug 30, 2004, 9:35 a.m.: 28 IR 164)