For Water Subcommittee Meeting October 23, 2024
TO: Honorable Water Subcommittee Members
APPROVAL: John Rossi, Interim Utilities Director
FROM: Nicole Hemmans, Senior Administrative Analyst
...Title
Staff requests that the Water Subcommittee provide feedback on the Lead Copper Rule Regulation (LCRR) and Lead Service Lines (LSL) Inventory update. (ACTION)
RECOMMENDATION
Staff recommends that the Water Subcommittee provide feedback on the Lead Copper Rule Regulation (LCRR) and Lead Service Lines (LSL) Inventory update.
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BACKGROUND
The Water Subcommittee received presentations from staff on September 27, 2023 & February 28, 2024, about the United States Environmental Protection Agency's (U.S. EPA) Lead and Copper Rule Revisions (LCRR) and Lead Service Lines (LSL) Inventory. On March 12, 2024, the City Council/Rialto Utility Authority Board authorized a contract with 120Water, Inc. to meet the City's compliance with the Federal Environmental Protection Agency's Lead and Copper Rule Revisions.
ANALYSIS/DISCUSSION
The Lead and Copper Rule Revision (LCRR) requires the Public Water System (PWS) to develop an inventory to identify the materials of service lines connected to the public water distribution system. The PWS must also review sources of information to identify service line materials for the initial inventory. The water system may use sources of information if approved by the State such as any identification method to assess service lines materials.
The identification method used for the verification strategy is a statistical approach. The statistical approach allowed for completing a service line inventory with a 95% level of statistical confidence (with ?5% margin of error and 50% sample proportion).
The statistical method includes the following steps:
Step 1: Identification of All Service Lines of Unknown Material
Step 2: Identification of the Number of Service Lines to be Physically Inspected
Rialto, CA has more than 1,500 unknown service li...
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