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Direct observation of the substantial soil water indicates subsurface percolation is readily occurring. This is not an adverse condition with respect to nitrate formation. Saturated soils create anaerobic conditions that lead to prevention of nitrification and promote denitrification of nitrate molecules that have already formed. III. NITRATE LOADING STUDY FINDINGS A. WASTEWATER FLOW PROJECTIONS AND CHARACTERISTICS Characteristics of the wastewater flow to be ultimately disposed to the soil environment will be exclusively domestic wastewater flows from a Men's and a Women's restroom within the winery, 4 and a bathroom for one employee. WASTEWATER FLOW VOLUME PROJECTIONS Many variables are involved in estimating wastewater Average Daily Flows (ADF). Given these variables are unknown but do not typically vary from what can be realistically estimated, flow volumes will be projected using EHD Sewage Standards. Therefore, assigning 150 gpd for each of the three toilets referenced above, which complies with EHD Sewage Standards, gives a total daily wastewater flow of 150 + 150 + 150 = 450 gpd from the entire facility. This also incorporates a huge safety factor due to the fact that wit ow ow toilets at l 5 gals/flush each toilet would have to be flushed over 100 times per day to create a volume of 150 gpd. WASTEWATER CHARACTERISTICS NLS§3.3. There will be no cooking or disposal of winery wastes into the septic system and no need for garbage disposals. Therefore, there should be no highly concentrated organic loading. The characteristics of the wastewater flow will be predominately blackwater from toilets, with a comparatively small volume of graywater from sinks, or other sources of graywater. Additional wastewater constituents may consist of, wine, coffee,juices or other similar type liquids to the +-1 system. No industrial or commercial chemicals, solvents, etc. are to be introduced into any of the septic systems. From the anticipated wastewater characteristics described above, the nitrogen emanating from the project may be at a higher concentration than what would normally be found in a typical domestic or household system. This can be attributed to the lack of a dilution effect that graywater from showers, laundry, and dishwashing would provide. The scientific literature cites nitrogen concentrations in residential septic effluent typically ranRi�nfrom 17 m�u NIL for basins, sinks, etc. to 140 mg N/L for toilet wastes. Therefore, considering a 70/30 percent usage for toilet water volume and sink water volume, respectively, a value of 103 mg N/L of septic effluent will be used to calculate nitrate nitrogenIoadinv for this project. A value of 66 mg N/L is typically used for residential calculations. _. w-. 7 Chesney Consulting