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Bert E. Van Voris4 - 10 - � 25 February 2005 Supervising Engineer established for the reservoir discharge, as it is less prone to short-term fluctuations and better represents the overall composition of the discharge than wastewater from the 1-million gallon settling pond. The addendum requests the organic and inorganic constituents of the wastewater be regulated separately and proposes to use BOD and EC to measure these constituents. The addendum proposes to estimate TDS using a TDS-EC correlation. It indicates IDS and volatile dissolved solids are inadequate measurements of the wastewater's inorganic and organic constituents because the heat required to obtain these measurements causes the wastewater's sodium bicarbonate to release carbon dioxide and artificially raise the volatile dissolved solids results. Comment: The addendum requests a lower monthly average flow than currently permitted. Waste Discharge Requirements Order No. R5-2002-0148 Discharge Specification B.1 permits a monthly average flow of wastewater and stormwater from the facility to the 1-mg pond of up to 0.8 mpd. The addendum requests that new WDRs permit a monthly daily average flow of 0.5 mgd until completion of the treatment facility, after which time the addendum requests a monthly daily average flow of 0.535 mgd. The RWD should identify the extent to which the concentrating effects of evaporation will increase the IDS concentration in wastewater discharged from the reservoir. This is necessary to identify the IDS levels in the discharge to the reservoir to ensure that the reservoir discharge IDS meets the identified target level. The RWD still does not thoroughly characterize the irrigation supply in both proposed use areas. To be determined complete, the RWD must attempt to project the concentrations of IDS and IDS constituents in leachate released to groundwater as a result of the recycled water project, even if it will take over 50 years for this release to reach groundwater.