EXH0633024606

II. Points of Compliance for Discharges to Surface Waters / / f _NTRODUCT_ON AND PROBLEM ETATEMENTS : j) Problem #I: The location at whic_ the discharge enters a water of the state may not be straightforward. See Section above. Setting that location is the first step toward solving the problems listed below, and in defining the point of compliance with AKA/%T requirements and water quality standards. Problem #2: The water quality standards require that _a_T' mixing_ z_nes f.or__tDrnv_ater shall _h_ed__l_ne (read: volumetric flow rate) of runoff corresponding to a '___b_r_m_d by the department." Ecology has not established an approved design storm for use in this application. Problem #3: Expanded mixing zones are allowed for storms above the "approved design storm." To obtain a larger mixing zone, certain prerequisites must be met. There isn't any formalized criteria or process available concerning how to meet the prerequisites. c_:_dis__q_ns. Critical receiving water 'conditions for stozTnwater discharges have not been established. DISCUSSION OF PROBLEM #I: If option #1 (see above discussion) is selected to address the waters of the state issue, and a mixing zone is not expressly allowed, the point of compliance is that location at which the discharge enters waters of the state. The quality of the discharge at that location must meet state surface water quality standards. The following list Of example situations is provided to help identify that location. Example Situations: i) An urban storm sewer, closed-pipe collectionsystem, collecting runoff from catch basins and discharging to - a natura!ly-occu---ring or…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]