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November 8, 2005 <br /> NOA Project Number: E05123B <br /> Table 1. <br /> Typical Quantity of Effluent for the Olive Mill Facility <br /> Category Total People per Average Quantity per Average Daily Flow <br /> 6 1 Day Person Per Parcel <br /> 6 employees <br /> Office Peak (3 employees per 15 gal/day/employee 6 employees* 15 gpd/employee*40 . <br /> _ Season(40 days) shift,two shifts,12- days/year use 1 year/365 days = 10 gpd <br /> hrs per shift) <br /> 1 or 2 employees Conservatively estimate <br /> Office Off Peak 15 gals per day average 15 gpd/employee 1 employee. 325 <br /> for limited periods <br /> Season(325 days) on limited days daily flow for limited off days/year use. 1 year/365 days= 13 gpd <br /> F1season uses. <br /> Total daily flow averaged for the year 10 gpd +:13 gpd =23 gpd <br /> Note -gpd is gallons per day. <br /> F1 The average total nitrogen concentration of domestic waste water is normally considered to be <br /> `.w <br /> 20-85 mg/1-1 (Crites and Tchobanoglous, 1111. For the purposes of the nitrate loading estimate, <br /> the long-term average concentration for total nitrogen in waste water is estimated to be 55 mg/L-N. <br /> w <br /> 3.4.2 Denitrification Estimate <br /> FJDenitrification is an important process which occurs within the leach field whereby certain bacteria <br /> .utilize the oxygen in the nitrate (NO3) and release nitrogen gas (N� to the atmosphere. <br /> Denitrification is expressed as a percentage,.and the normally accepted range is 10 percent to 35 <br /> percent. Soils with higher clay content, moist soil conditions, high pH, and organic material <br /> denitrify by about 35 percent, and soils with high sand content and fast percolation rates are <br /> estimated to denitrify at a lower rate, about 10 percent to 15 percent. <br /> A typical denitrification factor of 25 percent was selected for the Site due to the presence of dark <br /> adobe surface clays. <br /> 3.5 Nitrate Laadi, Scenario <br /> A nitrate loading scenario was performed to determine the impact from the proposed project. The <br /> scenario utilizes the variables discussed previously which represent the estimated conditions and <br /> uses associated with this project. The following table presents a summary of the nitrate loading <br /> Fi calculation (Plate 2). <br /> 6 <br /> 44 <br />