Indiana Administrative Code › Title 327 - WATER POLLUTION CONTROL DIVISION › Article 8 - PUBLIC WATER SUPPLY › Rule 2.6 - Enhanced Filtration and Disinfection › Section 2.6-16 - Source toolbox components; requirements for microbial toolbox components; enhanced treatment for Cryptosporidium

Current through July 10, 2024
Authority: IC 13-13-5; IC 13-14-8-7; IC 13-14-9; IC
				  13-18-3-2; IC 13-18-16
Affected: IC 13-18-3-11
Sec. 16.
(a) A PWS
				may receive a 0.5-log Cryptosporidium treatment credit for implementing a
				watershed control program that meets the requirements of this section, if the
				PWS meets the following:
(1) A PWS that
				intends to apply for the watershed control program credit shall notify the
				commissioner of this intent not later than two (2) years prior to the treatment
				compliance date applicable to the system under section 13 of this
				rule.
(2) In order for a PWS to
				receive watershed control program treatment credit, a watershed control plan
				must be approved by the commissioner. A PWS shall submit to the commissioner a
				proposed watershed control plan not later than one (1) year before the
				applicable treatment compliance date in section 13 of this rule. The watershed
				control plan must include the following elements:
(A) Identification of an area of influence
				outside of which the likelihood of Cryptosporidium or fecal contamination
				affecting the treatment plant intake is not significant. The area of influence
				is the area to be evaluated in future watershed surveys under subdivision
				(5)(B).
(B) Identification of both
				potential and actual sources of Cryptosporidium contamination and an assessment
				of the relative impact of these sources on the source water quality for the
				PWS.
(C) An analysis of the
				effectiveness and feasibility of control measures that could reduce
				Cryptosporidium loading from sources of contamination to the source water for
				the PWS.
(D) A statement of goals
				and specific actions the PWS will undertake to reduce source water
				Cryptosporidium levels, including the following:
(i) An explanation of how the actions are
				expected to:
(AA) contribute to specific
				goals;
(BB) identify watershed
				partners and their roles; and
(CC)
				identify resource requirements and commitments.
(ii) A schedule for plan implementation with
				deadlines for completing specific actions identified in the plan.
(3) A PWS with a
				watershed control program already in place on January 5, 2006, is eligible to
				seek the watershed control program credit if the watershed control plan:
(A) meets the criteria in subdivision (2);
				and
(B) specifies ongoing and
				future actions that will reduce source water Cryptosporidium levels.
(4) If the PWS meets the
				requirements of this section, but the commissioner does not respond to the PWS
				regarding approval of its watershed control plan submitted under this section
				by the date in Table 13 in section 13(b) of this rule, the:
(A) watershed control program will be
				considered approved; and
(B)
				0.5-log Cryptosporidium treatment credit will be awarded; unless and until the
				commissioner subsequently withdraws the approval.
(5) A PWS shall complete the following
				actions to maintain the 0.5-log Cryptosporidium treatment credit:
(A) Submit to the commissioner an annual
				watershed control program status report that contains the following:
(i) A description of the PWS's implementation
				of the approved plan.
(ii) An
				assessment of the adequacy of the plan to meet its goals.
(iii) An explanation of how the PWS is
				addressing any shortcomings in plan implementation, including shortcomings
				identified:
(AA) previously by the
				commissioner; or
(BB) as the result
				of the watershed survey conducted under clause (B).
(iv) A description of any significant changes
				that have occurred in the watershed since the last watershed sanitary survey. A
				PWS shall notify the commissioner prior to making any significant changes to
				its watershed control program and the notice must include the following:
(AA) The reason for proposing a significant
				change, such as a determination by the PWS during implementation of the
				watershed control program that making a significant change to its approved
				watershed control program is necessary.
(BB) The actions the PWS will take to
				mitigate any likelihood that the significant change could reduce the level of
				source water protection.
(B)
				Undergo a watershed sanitary survey every three (3) years for a CWS and every
				five (5) years for an NCWS. The watershed sanitary survey must:
(i) be conducted according to guidelines set
				by the commissioner and by persons approved by the commissioner;
(ii) result in a survey report submitted to
				the commissioner; and
(iii) meet
				the following criteria:
(AA) Encompass the
				region identified as the area of influence in the watershed control plan
				approved by the commissioner.
(BB)
				Assess the implementation of actions to reduce source water Cryptosporidium
				levels.
(CC) Identify any
				significant new sources of Cryptosporidium. If the commissioner determines that
				significant changes have occurred in the watershed since the previous watershed
				sanitary survey, the PWS shall undergo another watershed sanitary survey by a
				date required by the commissioner that may be at an earlier interval than the
				three (3) or five (5) year interval specified under this clause.
(C) Make the following documents available to
				the public upon request:
(i) The watershed
				control plan.
(ii) Annual status
				reports.
(iii) Watershed sanitary
				survey reports.
These documents must be in a plain language style and include
				  criteria by which to evaluate the success of the program in achieving plan
				  goals. The commissioner may allow systems to withhold from the public those
				  portions of the documents that concern water supply security
				  considerations.
If the commissioner determines that a PWS is not carrying out
				  the approved watershed control plan, the commissioner may withdraw the
				  watershed control program treatment credit.