Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article II - Water Resources › Chapter 109 - SAFE DRINKING WATER › Subchapter L - LONG-TERM 2 ENHANCED SURFACE WATER TREATMENT RULE › Section 109.1204 - Requirements for microbial toolbox components

Current through Register Vol. 54, No. 28, July 13, 2024
(a) A system will receive the treatment
						credits listed in Appendix B to Subchapter L. Microbial Toolbox Summary Table:
						Options, Treatment Credits and Criteria, by meeting the conditions for
						microbial toolbox components described in subsections (b)-(q). A system shall
						apply these treatment credits to meet the treatment technique requirements
						listed in section §
												109.1203 (relating to bin
						classification and treatment technique requirements).
(b)
Watershed control
						program.
Filtered systems receive 0.5-log
Cryptosporidium
treatment credit for implementing a watershed
						control program that meets the requirements of this subsection. This credit may
						not be used to maintain the additional log removal credits specified in §
												109.1203. This credit may only be
						applied in addition to the toolbox options used to meet the minimum log removal
						and may apply in lieu of a toolbox option for which credit has been temporarily
						revoked. Unfiltered systems are not eligible for this credit.
(1) Systems that intend to apply for the
						watershed control program credit shall notify the Department of this intent at
						least 2 years prior to the treatment compliance date applicable to the system
						in §
													109.1203(k)-(o).
(2) Systems shall submit to the Department a
						proposed watershed control plan at least 1 year before the applicable treatment
						compliance date in §
													109.1203(k)-(o).
						The Department will approve the watershed control plan for the system to
						receive watershed control program treatment credit. The watershed control plan
						must include the following elements:
(i)
						Identification of an "area of influence" outside of which the likelihood of
Cryptosporidium
or fecal contamination affecting the treatment
						plant intake is not significant. This is the area to be evaluated in future
						watershed surveys under paragraph (4)(ii).
(ii) Identification of both potential and
						actual sources of
Cryptosporidium
contamination and an
						assessment of the relative impact of these sources on the system's source water
						quality.
(iii) An analysis of the
						effectiveness and feasibility of control measures that could reduce
Cryptosporidium
loading from sources of contamination to the
						system's source water.
(iv) A
						statement of goals and specific actions the system will undertake to reduce
						source water
Cryptosporidium
levels. The plan must explain how
						the actions are expected to contribute to specific goals, identify watershed
						partners and their roles, identify resource requirements and commitments, and
						include a schedule for plan implementation with deadlines for completing
						specific actions identified in the plan.
(3) Systems with existing watershed control
						programs (that is, programs in place on January 5, 2006) are eligible to seek
						this credit. Their watershed control plans must meet the criteria in paragraph
						(2) and must specify ongoing and future actions that will reduce source water
Cryptosporidium
levels.
(4)
Systems shall complete the
						following actions to maintain the 0.5-log credit:
(i) Submit an annual watershed control
						program status report to the Department. The annual watershed control program
						status report must describe the system's implementation of the approved plan
						and assess the adequacy of the plan to meet its goals. The report must explain
						how the system is addressing any shortcomings in plan implementation, including
						those previously identified by the Department or as the result of the watershed
						survey conducted under subparagraph (ii). The report must also describe
						significant changes that have occurred in the watershed since the last
						watershed sanitary survey. If a system determines during implementation that
						making a significant change to its approved watershed control program is
						necessary, the system shall notify the Department prior to making any changes.
						If a change is likely to reduce the level of source water protection, the
						system shall also list in its notification the actions the system will take to
						mitigate this effect.
(ii) Undergo
						a watershed sanitary survey every 3 years for community water systems and every
						5 years for noncommunity water systems and submit the survey report to the
						Department. The survey must be conducted according to Department guidelines and
						by persons the Department approves.
(A) The
						watershed sanitary survey must meet the following criteria:
(I) Encompass the region identified in the
						Department-approved watershed control plan as the area of influence.
(II) Assess the implementation of actions to
						reduce source water
Cryptosporidium
levels.
(III) Identify any significant new sources of
Cryptosporidium
.
(B) If the Department determines that
						significant changes may have occurred in the watershed since the previous
						watershed sanitary survey, systems shall undergo another watershed sanitary
						survey by a date the Department requires, which may be earlier than the regular
						date in this subparagraph.
(iii) The system shall make the watershed
						control plan, annual status reports, and watershed sanitary survey reports
						available to the public upon request. 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 Department may approve systems to withhold
						from the public portions of the annual status report, watershed control plan,
						and watershed sanitary survey based on water supply security
						considerations.
(5) If
						the Department determines that a system is not carrying out the approved
						watershed control plan, the Department may withdraw the watershed control
						program treatment credit.