Westminster has completed the LSLI required by U.S. EPA’s LCRR. The deadline for the LSLIs is October 16, 2024.
Through completing a historical records review and field investigations, Westminster has determined it has no lead or galvanized requiring replacement service lines in its distribution system. This includes any privately-owned or customer-owned service lines.
Westminster reviewed all applicable sources of information, including:
• Available construction and plumbing codes to assess historical regulation of lead service line disallowance (e.g. National Lead Ban, State Codes, County Codes, Westminster’s Codes);
• Available construction permit requests of Westminster, including 630 permits providing detailed information on the permits such as account number, address, permit (type, number, work class, issue date, status, description, application date, last inspection date);
• Inspections and records of the distribution system that indicate service line material, including inspections conducted during the course of normal operations (e.g., checking service line materials when reading water meters or performing maintenance activities), including 496 records collected in 2023; and
• Resource, information, or identification method provided or required by the State to assess service line materials such as customer data.
In addition to reviewing the above sources of information, Westminster used an alternative method to develop the inventory that was approved by DDW on a case-by-case basis.
Westminster used stratified random sampling to develop the initial inventory. Stratified random sampling involves physically inspecting a subset of randomly selected service lines in the distribution system. That subset is stratified or divided into groups based on certain characteristics (e.g., years the service lines were installed). Stratification allows for a sample or subset of service lines to be more representative of the service lines in the distribution system.
After investigating the subset of service lines, if no lead or galvanized requiring replacement service lines are discovered, the remaining service lines may be assumed non-lead with a certain level of confidence.
Westminster inspected 3,246 service lines on the utility-side and 1,780 service lines on the customer-side, and the service lines were inspected non-lead. No lead or galvanized requiring replacement service lines were identified.
Westminster intends to document service line material information obtained from normal operations, such as service line maintenance or water meter readings, after October 2024 and will update the initial inventory accordingly.