Lead Service Line Inventory

Non-Lead Service Line Material Designation Statement

Fountain Valley 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, Fountain Valley 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.

Fountain Valley reviewed all applicable sources of information, including:

• Available plumbing codes to assess historical regulation of lead service lines locally (e.g., National Lead Ban, State Codes, County Codes, the Codes and Standards of the incorporated cities before the statewide lead ban in 1986 including the Fountain Valley codes).

• Water system records which indicate the service line materials, customer data, historical capital improvement or master plans, and standard operating procedures.

• Water distribution system records which indicate the service line materials, GIS data, distribution system maps and drawings, as-builts, historical lead and copper tap sampling results from 1992-1993, historical lead 90th percentile action level.

• Other records such as the county parcel data, tract maps, and tax assessor records.

In addition to reviewing the above sources of information, Fountain Valley used alternative methods to develop the LSLI that was approved by the State Water Resources Control Board Division of Drinking Water on a case-by-case basis.

Fountain Valley used indirect interpolation and stratified random sampling approaches to develop the LSLI. Both approaches involve physically inspecting a representative subset of service lines to confirm non-lead materials. The subset was stratified or divided into groups based on certain characteristics (e.g., years the service lines were installed). Stratification allowed 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, the remaining service lines may be assumed non-lead since no lead or galvanized requiring replacement service lines were observed. Fountain Valley inspected 283 service lines on the utility-side, 3 service lines on the customer-side, and 1,084 service lines on both sides, and the service lines were inspected to be non-lead. No lead or galvanized requiring replacement service lines were observed.

Fountain Valley intends to document service line material information obtained from normal operations, such as service line repair or replacement, after October 2024 and will update the LSLI according to LCRR requirements.