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TABLE 4 <br /> PRECIPITATION AND Eto DATA FOR TRACY, CA (Closest Data) <br /> Month 2 Years in 10 will have more Eto Average Potential Deep <br /> precipitation than: (in/mo) (in/mo) (in/day) Percolation(in/mo) <br /> January 2.93 1.55 0.05 1.38 <br /> February 2.21 2.24 0.08 -- <br /> March 2.38 3.72 0.12 -- <br /> April 1.51 5.10 0.17 <br /> May 0.71 6.82 0.22 -- <br /> June 2.09 7.80 0.26 -- <br /> July 0.28 8.68 0.28 -- <br /> August 1.05 7.75 0.25 -- <br /> September 0.84 5.70 0.19 -- <br /> October 1.06 4.03 0.13 -- <br /> November 2.10 2.10 0.07 -- <br /> December 2.38 1.55 0.05 0.83 <br /> TOTALS(in.) 13.18 57.0 ------ 2.21 <br /> The Table illustrates that evapotranspiration far exceeds precipitation, even when using higher <br /> rainfall data that exceeds normal rainfall data by 28% (10.33 in. vs. 13.18 in.) Only in the months <br /> of December and January, and possibly November and February would deep percolation potentially <br /> occur. This data illustrates a relatively high potential for there to be significant evapotranspiration <br /> (or bare soil surface evaporation) from the filter bed disposal area and not deep percolation. <br /> III. NITRATE LOADING STUDY FINDINGS <br /> A. WASTEWATER FLOW VOLUME PROJECTIONS AND CHARACTERISTICS <br /> Wastewater Flow Volume Projection <br /> To determine nitrate-nitrogen loading from the project, wastewater flow volumes will be very <br /> conservatively determined. Typically, loading projections are based on the maximum or total number of <br /> employees and customers who may potentially use the toilet/sink,etc. on a workday basis. Wastewater flow <br /> volume projections for facilities in unsewered areas have been historically and typically calculated under <br /> numerous guidelines and scenarios, as illustrated in the following list: <br /> 6 <br />