Agmt01 County of San Mateo NPDES

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b. Bottom deposits or aquatic growths; c. Alterations of temperature, sediment load, nutrient load, dissolved oxygen which cause significant adverse impacts to native aquatic biota; d. Visible, floating, suspended, or deposited oil or products of petroleum origin; and/or e. Substances present in concentrations or quantities which cause deleterious effects on aquatic biota, wildlife, or waterfowl, or which render any of these unfit for human consumption. 2. The discharge shall not cause or contribute to a violation of any applicable water quality standard for receiving waters contained in the California Ocean Plan or the Regional Board's Basin Plan. If different applicable water quality standards are adopted after the date of adoption of this Order, the Board may revise and modify this Order as appropriate. C. Provisions 1. The Dischargers shall comply with Discharge Prohibition A.2 and Receiving Water Limitations B.1 and B.2 through the timely implementation of control measures and other actions to reduce pollutants in the discharge in accordance with the Stormwater Management Plan (Plan) and other requirements of this permit including any modifications. The Plan shall be designed to achieve compliance with Receiving Water Limitations B.1 and B.2. If exceedance(s) of water quality standards or water quality objectives (collectively WQSs) persist notwithstanding implementation of the Plan, a Discharger shall assure compliance with Discharge Prohibition A.2 and Receiving Water Limitations B.1 and B.2 by complying with the following procedure: Upon a determination by either the Discharger(s) or the Regional Board that discharges are causing or contributing to an exceedance of an applicable WQS, the Discharger(s) shall promptly notify and thereafter submit a report to the Regional Board that describes BMPs that are currently being implemented and additional BMPs that will be implemented to prevent or reduce any pollutants that are causing or contributing to the exceedance of WQSs. The report may be incorporated in the annual update to the Plan unless the Regional Board directs an earlier submittal. The report shall include an implementation schedule. The Regional Board may require modifications to the report; Submit any modifications to the report required by the Regional Board within 30 days of notification;