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FALL CREEK ENGINEERING,INC. earth fill and gravel substrate) the any remainder will flow out of the wetland, into the pump basin, and will be used for irrigation of the grass field. In the month of January an assumption has to be made about the initial storage in the wetland. This assumption, as stated in the Revised RWD, is that the wetland is full but there is no water held in the freeboard. The assumption is shown in the water balance tables as a separate row labeled"Initial Conditions." The water balances were also revised to model both the average rainfall year and the 100-year return annual precipitation total as requested by the RWQCB. The statistical analysis used to find the 100-year return annual precipitation total is presented in Section 3.1.3 of the Revised RWD and Section 2.2.3 of the Revised Engineering Report. (9) The high organic loading rates to the wetland will occur in August through December each year. The high organic loading rates will correspond with higher volumes of water flowing through the wetland because August through October is the peak wastewater discharges and then November through February are the peak stormwater months. The high flows (relative to the spring and summer months) keep water flowing through the wetland and prevent the stagnation that leads to anaerobic conditions and causes odors. The stormwater flows that occur in the months after crush are relatively high in volume and low in organic content. These stormwater flows will flush organic matter from the system, which will reduce the likelihood that odors will occur in the spring and summer months when flows through the wetland are significantly lower. In the event that odors do occur, the Winery could add additional freshwater to the wetland to increase the oxygen content of the wetland water and control odor generation, however, the need to do this is unlikely. (10) FCE has performed a mass-balance to estimate dissolved solids loadings. Please review the revised Report of Waste Discharge. Thank you for your attention in this matter. If you have any further questions or require any additional information please call me at(831)426-9054. Sincerely, 4ETER HAASE, P.E. Principal Engineer Enclosures cc+encl. Greg Burns, Jessie's Grove Winery, Lodi Mike Huggins, San Joaquin County EHD, Stockton Shawn Hart, San Joaquin Public Works Department 3