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LOGE 1605: Durst Winery NLS Addendum Page 4 March 21, 2016 According to Mr. Durst, the small winery is open seven days a week. Mr. Durst estimates that, on average, less than 10 customers per day visit the winery. On weekdays (Monday through Thursday), the only employees will be those living in the house on-site; as such, these employees are excluded from the flow calculation. On Friday and Sunday, one additional employee will be present, and on Saturday, two additional employees will be present. A total of 20 marketing events per year are anticipated, with up to 100 cluests present at each event. Each event will require two staff members, according to Mr. Durst. The nitrate as nitrogen (N) concentration of these uses is estimated to be 85-mg/L (Crites and Tchobanoglous, 1998). In addition to the winery uses, the existing four-bedroom residence is considered for the nitrate loading. We estimate a maximum use of 120 gallons per day per bedroom for the residence. A typical residential concentration of 45 mg/L of nitrate as N is selected (Crites and Tchobanoglous, 1998). It is possible a second dwelling unit could be constructed on the Site in the future. The second dwelling unit can be up to two bedrooms. This potential future use is considered. No contributions from the future vineyard irrigation or soil amendments are considered for the Hantzsche/Finnemore method, It is reasonably assumed that the irrigation and soil amendments would be applied at close to agronomic rates for a net balance of plant irrigation and nutrients. The maximum average daily flow for the Site was estimated to be 806.2 gallons per day (gpd). Through the use of a weighted average, the average concentration of all the different effluent flows and concentrations was determined to be 49.3 mg/L-N at 806.2 gallons per day. Please see the following tables that present the information in a tabular form.