Missouri Code of State Regulations › Title 10 - DEPARTMENT OF NATURAL RESOURCES › Division 60 - Safe Drinking Water Commission › Chapter 15 - Lead and Copper › Section 10 CSR 60-15.050 - Lead Service Line Replacement Requirements

Current through Register Vol. 49, No. 14, July 15, 2024
PURPOSE: This rule sets forth requirements for the
				  removal of lead service lines if lead action levels are exceeded, and corrosion
				  control efforts and source water treatment are unsuccessful in lowering the
				  lead concentration levels in tap samples.
(1) Systems that fail to meet the lead action
				level in tap samples taken pursuant to
				10
				CSR 60-15.070(4)(B), after installing
				corrosion control, source water treatment, or both (whichever sampling occurs
				later), shall replace lead service lines in accordance with the requirements of
				this section. If a system is in violation of
				10
				CSR 60-15.020 or
				10 CSR
				60-15.040 for failure to install source water or
				corrosion control treatment, the department may require the system to commence
				lead service line replacement under this section after the date by which the
				system was required to conduct monitoring under
				10
				CSR 60-15.070(4)(B) has
				passed.
(2) A water system shall
				replace annually at least seven percent (7%) of the initial number of lead
				service lines in its distribution system. The initial number of lead service
				lines is the number of lead lines in place at the time the replacement program
				begins. The system shall identify the initial number of lead service lines in
				its distribution system, including an identification of the portion(s) owned by
				the system, based upon a materials evaluation, including the evaluation
				required under
				10
				CSR 60-15.070(1) and relevant legal
				authorities (e.g., contracts, local ordinances) regarding the portion owned by
				the system. The first year of lead service line replacement shall begin on the
				first day following the end of the monitoring period in which the action level
				was exceeded under section (1) of this rule. If monitoring is required annually
				or less frequently, the end of the monitoring period is September 30 of the
				calendar year in which the sampling occurs. If the department has established
				an alternate monitoring period, then the end of the monitoring period will be
				the last day of that period.
(3)
				Any water system resuming a lead service line replacement program after the
				cessation of its lead service line replacement program as allowed by section
				(7) of this rule shall update its inventory of lead service lines to include
				those sites that were previously determined not to require replacement through
				the sampling provision under section (4) of this rule. The system will then
				divide the updated number of remaining lead service lines by the number of
				remaining years in the program to determine the number of lines that must be
				replaced per year (seven percent (7%) lead service line replacement is based on
				a fifteen-(15-) year replacement program, so, for example, systems resuming
				lead service line replacement after previously conducting two (2) years of
				replacement would divide the updated inventory by thirteen (13)). For those
				systems that have completed a fifteen-(15-) year lead service line replacement
				program, the department will determine a schedule for replacing or retesting
				lines that were previously tested out under the replacement program when the
				system re-exceeds the action level.
(4) A system is not required to replace an
				individual lead service line if the lead concentration in all service line
				samples from that line, taken pursuant to
				10
				CSR 60-15.070(2)(C), is less than or
				equal to 0.015 milligrams per liter (mg/L).
(5) A water system shall replace that portion
				of the lead service line that it owns. In cases where the system does not own
				the entire lead service line, the system shall notify the owner of the line, or
				the owner's authorized agent, that the system will replace the portion of the
				service line that it owns and shall offer to replace the owner's portion of the
				line. A system is not required to bear the cost of replacing the
				privately-owned portion of the line, nor is it required to replace the
				privately-owned portion where the owner chooses not to pay the cost of
				replacing the privately-owned portion of the line, or where replacing the
				privately-owned portion would be precluded by department, local, or common law.
				A water system that does not replace the entire length of the service line also
				shall complete the following tasks:
(A) At
				least forty-five (45) days prior to commencing with the partial replacement of
				a lead service line, the water system shall provide notice to the resident(s)
				of all buildings served by the line explaining that they may experience a
				temporary increase of lead levels in their drinking water, along with guidance
				on measures consumers can take to minimize their exposure to lead. The
				department may allow the water system to provide this notice less than
				forty-five (45) days prior to commencing partial lead service line replacement
				where such replacement is in conjunction with emergency repairs. In addition,
				the water system shall inform the resident(s) served by the line that the
				system will, at the system's expense, collect a sample from each
				partially-replaced lead service line that is representative of the water in the
				service line for analysis of lead content, as prescribed under
				10
				CSR 60-15.070(2)(C), within
				seventy-two (72) hours after the completion of the partial replacement of the
				service line. The system shall collect the sample and report the results of the
				analysis to the owner and the resident(s) served by the line within three (3)
				business days of receiving the results. Mailed notices postmarked within three
				(3) business days of receiving the results shall be considered "on time";
				and
(B) The water system shall
				provide the information required by subsection (4)(A) of this rule to the
				residents of individual dwellings by mail or by other methods approved by the
				department. In instances where multi-family dwellings are served by the line,
				the water system shall have the option to post the information at a conspicuous
				location.