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Table 4. Shifts Anticipated Shift(Hours) Occupancy Level Days per week Months Slow Season 1-S 10 employees, 1 5 May — mid-September (6:00 am —2:30 pm) delivery 2-S 5 employees 5 May — mid-September (8:00 am — 5:00 pm) The estimated sewage flow rates for various uses are available from a number of references. The uses presented below were guided by the San Joaquin County On-Site Wastewater Disposal Standards (2003), Crites and Tchobanoglous (1998), and EPA (1980). The references indicate that 13 gallons for each employee is typical for an office worker, and 5 gallons per user is typical for a public lavatory; these rates were used for the walnut processing facility staff and visitors (Crites and Tchobanoglous, 1998). The estimated flow values discussed here should not be used for the design and sizing of the septic system. The design and sizing of the septic system should utilize the San Joaquin County Environmental Health Sewage Standards which incorporate peak and surge flow factors. The estimates used in the Sewage Standards may be greater than those discussed here. A concentration of 85 m /L of nitrate as N is selected for staff, customers, and delivery workers (Crites And Tc obanoglous, 1998). No contributions from the surrounding agriculture, irrigation, or soil amendments were 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 ma 'mum average daily flow over an average year for the Site was estimated to be 276.4 allons per day (gpd). Please see the following table that presents the infor t'on 'n a tabular form. Table 5. Average Daily Flow Calculation Use Units Rate Subtotal Reductions * Average Daily (shift, etc.) Flow 1-P staff 19 13 gal/employee 247 gal (5/7)(3/12) X44.1 gpd-1 1-P 1 5 gal/customer 5 gal (5/7)(3/12) 0.9 gpd customers LOGE 1123 Page 10