Section 327IAC8-2.3-2. General requirements and applicability

   (a) This rule applies to ground water systems as defined under section 1 of this rule. Ground water systems shall comply with this rule, unless otherwise noted, beginning December 1, 2009.

  (b) A ground water system subject to this rule shall comply with the following:

(1) Sanitary survey requirements for all ground water systems as described under 327 IAC 8-2-8.2.

(2) Microbial source water monitoring requirements for ground water systems that do not treat all of their ground water to at least ninety-nine and ninety-nine hundredths percent (99.99%) (4-log) treatment of viruses using:

(A) inactivation;

(B) removal; or

(C) a combination of 4-log virus inactivation and removal approved by the commissioner;

before or at the first customer as described in section 3 of this rule.

(3) Treatment technique requirements described under section 5 of this rule that must be implemented as follows:

(A) By a ground water system that has one (1) or both of the following:

(i) Fecally contaminated source waters, as determined by source water monitoring conducted under section 4 of this rule.

(ii) Significant deficiencies that are identified by the commissioner during a sanitary survey in accordance with 327 IAC 8-2-8.2.

(B) A ground water system subject under clause (A) to the treatment technique requirements under section 5 of this rule shall implement one (1) or more of the following corrective action options:

(i) Correct all significant deficiencies.

(ii) Provide an alternate source of water.

(iii) Eliminate the source of contamination.

(iv) Provide treatment that reliably achieves at least 4-log treatment of viruses using:

(AA) inactivation;

(BB) removal; or

(CC) a combination of 4-log virus inactivation and removal approved by the commissioner;

before or at the first customer.

(4) A ground water system that provides at least 4-log treatment of viruses using:

(A) inactivation;

(B) removal; or

(C) a combination of 4-log virus inactivation and removal approved by the commissioner;

before or at the first customer is required to conduct compliance monitoring to demonstrate treatment effectiveness, as described under section 5(b) of this rule.

(5) If requested by the commissioner, a ground water system shall provide the commissioner with any existing information that will enable the commissioner to perform a hydrogeologic sensitivity assessment.

(6) A ground water PWS subject to this rule shall have a smooth-nosed sampling tap that meets the following:

(A) Has no interior or exterior threads available for sample collection.

(B) Is located:

(i) at a point prior to any treatment or storage for each ground water source; and

(ii) in such a manner that it:

(AA) prevents contamination of the tap; and

(BB) facilitates sampling, when necessary.

Other tap installations may be approved by the commissioner on a case-by-case basis if the ground water system submits a written request to the commissioner and receives a written approval from the commissioner.

(Water Pollution Control Division; 327 IAC 8-2.3-2; filed May 7, 2010, 9:30 a.m.: 20100602-IR-327080198FRA; errata filed Jul 2, 2010, 1:12 p.m.: 20100714-IR-327100432ACA)