Agmt01 County of San Mateo NPDES

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procedures. 20. The Regional Board has notified the Dischargers and interested agencies and interested persons of its intent to prescribe reissued waste discharge requirements and a reissued NPDES for this discharge and has provided them with an opportunity for a public hearing and an opportunity to submit their written views and recommendations. 21. The Regional Board, at a properly noticed public meeting, heard and considered all comments pertaining to the discharge. 22. It is the intention of the Regional Board that this Order supersedes Order No. 93-106. 23. This Order serves as a NPDES permit, pursuant to CWA Section 402, or amendments thereto, and shall become effective ten days after the date of its adoption provided the Regional Administrator, USEPA, Region IX, has no objection. IT IS HEREBY ORDERED that the Dischargers, in order to meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder and the provisions of the Clean Water Act as amended and regulations and guidelines adopted thereunder, shall comply with the following: A. Discharee Prohibitions The Dischargers shall, within their respective jurisdictions, effectively prohibit the discharge of non-stormwater (materials other than stormwater) into their storm drain systems and watercourses that they own and/or operate. NPDES permitted discharges are exempt from this prohibition. Non -polluted discharges are also exempt from this prohibition. Some examples of non -polluted discharges are landscape irrigation runoff that is not polluted with silt, fertilizer, herbicides or pesticides, non -polluted groundwater pumped discharge and once -through non -contact cooling water which has lost chorine residual. Compliance with this prohibition shall be demonstrated in accordance with Provision C.12 of this Order. Provision C.12 describe a tiered categorization of non-stormwater discharges based on potential for pollutant content. 2. The discharge of stormwater from a facility or activity that causes or contributes to a violation of Receiving Water Limitations is prohibited. B. Receivine Water Limitations 1. The discharge shall not cause the following conditions to create a condition of nuisance or to adversely affect beneficial uses of waters of the State: a. Floating, suspended, or deposited macroscopic matter, or foam;