Dear Mr. Warner:

The Central Valley Clean Water Association (CVCWA) appreciates the opportunity to submit these comments on the tentative waste discharge requirements (Tentative Order) for the City of Dunsmuir Wastewater Treatment Plant (WWTP) in Shasta and Siskiyou Counties. CVCWA is a non-profit organization representing more than 50 publicly owned treatment works throughout the Central Valley Region in regulatory matters affecting surface water discharge, land application, and water reuse. We approach these matters with a perspective to balance environmental and economic interests consistent with state and federal law. Upon reviewing the Tentative Order, CVCWA has concerns with respect to several issues. First, CVCWA is concerned with the proposed application (or lack thereof) of appropriate dilution credits. Second, CVCWA is concerned with the reasonable potential analysis statements concerning ammonia. Third, CVCWA is concerned with the inclusion of a Compliance Schedule for a Inflow and Infiltration Reduction Project and Wet Weather Capacity Improvements in the City’s NPDES permit. CVCWA’s comments and recommendations with respect to these issues are provided herein.