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Telsa Treatment Facility - 2 - 06 October 2021 General Order 2003-0003-DWQ-0223 Grit Pond #2 has a capacity of approximately 25,800 gallons and receives daily grit backwash/flushing of fresh water received from the Hetch Hetchy Reservoir. The pond was designed to overflow to the artificial wetland just east of the grit pond, where it percolates and evaporates, as shown on Attachment A. Approximately 25,800 gallons per day are discharged as needed to Grit Pond #2. Both ponds are inspected daily and are maintained by removing plants and accumulated grit as necessary to facilitate evaporation and percolation. Visual observations have not identified any discharged water leaving Facility property and no objectionable odors have been reported. As part of the NOI, the Discharger submitted a water balance for a 100-year, 24-hour storm event and a 100-year, 30-day storm event, signed and stamped by a Registered Professional Engineer. For both evaluations, the ponds and the wetland areas have sufficient capacity to manage wastewater discharged from the Facility and storm water. The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, Fifth Edition, revised May 2018 (hereafter Basin Plan), designates beneficial uses, establishes water quality objectives, contains implementation plans and policies for protecting waters of the basin, and incorporates by reference plans and policies adopted by the State Water Resources Control Board. Pursuant to §13263(a) of the California Water Code (CWC), waste discharge requirements must implement the Basin Plan. FACILITY-SPECIFIC REQUIREMENTS The General Order and this Notice of Applicability regulates discharges from the Telsa Treatment Facility. 1. Wastewater shall be disposed of as described in the Notice of Intent and in accordance with the requirements contained in the General Order. If UV bulb breakage occurs, the Discharger is required to follow their Mercury Response Standard Operating Procedures and notify the Central Valley Water Board of the breakage within 24 hours. 2. Discharging at a location or in a manner different from that described in the Notice of Intent or this Notice of Applicability is prohibited. 3. All technical reports required herein that involve evaluation, or other work requiring interpretation and proper application of engineering or geologic sciences, shall be prepared by or under the direction of persons registered to practice in California pursuant to California Business and Professions Code, section 6735, 7835, and 7835.1. As required by these laws, completed technical reports must bear the signature(s) and seal(s) of the registered professional(s) in a manner such that all work can be clearly attributed to the professional responsible for the work. 4. Monitoring results shall be submitted on a semi-annual basis in accordance the General Order's Monitoring and Reporting Program. For the January through June reporting period, the monitoring report is due August 15. For the July through December reporting period, the monitoring report is due February 15.