District Response to Water Quality Compliance Challenges
Explore the Heritage Ranch Community Services District's efforts to meet water quality regulations set by the California Water Boards. From current orders to proposed time schedule orders, learn about their actions, responses to compliance needs, and the proposed timeline for a new wastewater treatment facility. Discover the challenges faced and the steps taken to address them while avoiding mandatory minimum penalties.
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Presentation Transcript
Proposed Time Schedule Order No. R3-2022-0046 Heritage Ranch Community Services District Item 10 Todd Stanley NPDES Program California Water Boards October 13-14, 2022
General Location of Heritage Ranch CSD 2 California Water Boards
Current Orders in Effect 2017: Water Board adopted WDR Order No. R3-2017-0026 (NPDES Permit) Permit contains new effluent limits for copper and un-ionized ammonia that District cannot meet 2018: Board Executive Officer issued TSO R3-2018-0011 Provides time for operational adjustments to comply with permit Establishes interim limits for copper, un-ionized ammonia, and nitrate Requires quarterly progress reports 3 California Water Boards
District Actions to Comply with Current TSO Attempted change in water distribution system to inhibit corrosion of copper pipe and control pH Did not sufficiently reduce copper levels in effluent to comply with permit Hired consultant to evaluate potential modifications to existing treatment facility Determined need for new facility Requested extension of time schedule 4 California Water Boards
Districts Response to Need for New Facility In late 2021 hired consultant to analyze treatment needs and initiate project for new facility In 2022 continued progress toward: Developing cost estimates Securing funding Initiating permitting and environmental work Beginning design Above actions not required by current TSO 5 California Water Boards
Proposed TSO Overview Provides District with additional time needed to fund, design, construct, and commission a new wastewater treatment facility Interim effluent limits for copper, un-ionized ammonia, and nitrate remain the same as current TSO Quarterly progress reporting continues 6 California Water Boards
Mandatory Minimum Penalty Considerations TSO adoption also extends conditional protections from mandatory minimum penalties District must comply with TSO Only applies to copper, un-ionized ammonia, and nitrate limits Provides maximum shelter of five years District exceeded current TSO s interim effluent limits 6 times Executive Officer resolved violations in ACL Order No. R3- 2021-0030 for mandatory minimum penalty of $18,000 7 California Water Boards
Water Board Staff Recommendation Adopt Time Schedule Order No. R3-2022-0046 8 California Water Boards
This Slide Intentionally Left Blank 9 California Water Boards
Timing of Districts Compliance with Current TSO Complied with current TSO up to determination that new WWTP is required May 2018: Current TSO effective with 4-1/2 year duration May 2019: MKN hired to provide recommendations to address deficiencies Oct 2019: Operational changes determined ineffective (used 1-1/4 yrs.) 2nd Qtr 2020: MKN s scope expanded to evaluate existing WWTP, perform alternatives analysis, and preliminary engineering (used 1/2 yr.) 10 California Water Boards
Timing of Districts Compliance with Current TSO (continued) 2nd Qtr 2021: MKN determined new WWTP needed (used 1 yr.) District used total of 2-3/4 years, or about 60% of the TSO time before initiating new action above and beyond the TSO requirements 3rd Qtr 2021: WSC hired to initiate new project Characterize pollutant loading and hydraulic capacity Develop conceptual layouts Identify funding sources Begin preliminary engineering 11 California Water Boards
Timing of Districts Compliance with Current TSO (continued) 2022: WSC continued progress on new project Develop cost estimates Secure construction funding Perform permitting and environmental work Begin design and procurement efforts 12 California Water Boards
