Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 290 - PUBLIC DRINKING WATER › Subchapter F - DRINKING WATER STANDARDS GOVERNING DRINKING WATER QUALITY AND REPORTING REQUIREMENTS FOR PUBLIC WATER SYSTEM › Section 290.121 - Monitoring Plans

Current through Reg. 49, No. 28; July 12, 2024
(a) Applicability.
				  All public water systems shall maintain an up-to-date chemical and
				  microbiological monitoring plan. Monitoring plans are subject to the review and
				  approval of the executive director. A copy of the monitoring plan must be
				  maintained at each water treatment plant and at a central location.
(b) Monitoring plan requirements. The
				  monitoring plan shall identify all sampling locations, describe the sampling
				  frequency, and specify the analytical procedures and laboratories that the
				  public water system will use to comply with the monitoring requirements of this
				  subchapter.
(1) The monitoring plan shall
				  include information on the location of all required sampling points in the
				  system. Required sampling locations for regulated chemicals are provided in
				  §
											290.106 of
				  this title (relating to Inorganic Contaminants), §
											290.107 of
				  this title (relating to Organic Contaminants), §
											290.108
				  of this title (relating to Radionuclides Other than Radon), §
											290.109 of
				  this title (relating to Microbial Contaminants), §
											290.110 of
				  this title (relating to Disinfectant Residuals), §
											290.111
				  of this title (relating to Surface Water Treatment), §
											290.112
				  of this title (relating to Total Organic Carbon (TOC)), §
											290.113
				  of this title (relating to Stage 1 Disinfection Byproducts (TTHM and HAA5)),
				  §
											290.114
				  of this title (relating to Other Disinfection Byproducts (Chlorite and
				  Bromate)), §
											290.115
				  of this title (relating to Stage 2 Disinfection Byproducts (TTHM and HAA5)),
				  §
											290.116
				  of this title (Relating to Groundwater Corrective Actions and Treatment
				  Techniques), §
											290.117
				  of this title (relating to Regulation of Lead and Copper), and §
											290.118
				  of this title (relating to Secondary Constituent Levels).
(A) The location of each sampling site at a
				  treatment plant or pump station must be designated on a plant schematic. The
				  plant schematic must show all water pumps, flow meters, unit processes,
				  chemical feed points, and chemical monitoring points. The plant schematic must
				  also show the origin of any flow stream that is recycled at the treatment
				  plant, any pretreatment that occurs before the recycle stream is returned to
				  the primary treatment process, and the location where the recycle stream is
				  reintroduced to the primary treatment process.
(B) Each entry point to the distribution
				  system shall be identified in the monitoring plan as follows:
(i) a written description of the physical
				  location of each entry point to the distribution system shall be provided;
				  or
(ii) the location of each entry
				  point shall be indicated clearly on a distribution system or treatment plant
				  schematic.
(C) The
				  address of each sampling site in the distribution system shall be included in
				  the monitoring plan or the location of each distribution system sampling site
				  shall be designated on a distribution system schematic. The distribution system
				  schematic shall clearly indicate the following:
(i) the location of all pump stations in the
				  distribution system;
(ii) the
				  location of all ground and elevated storage tanks in the distribution system;
				  and
(iii) the location of all
				  chemical feed points in the distribution system.
(D) The system must revise its monitoring
				  plan if changes to a plant or distribution system require changes to the
				  sampling locations.