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7TABLEPRECIPITATION AND Eto DATA FOR STOCKTON, CA <br /> 2 Years in 10 will have more Eto Average Potential Deep <br /> precipitation than: (in/mo) Percolation(in/mo) <br /> (in/mo) (in/day) <br /> January 4.42 1.24 0.04 3.18 <br /> February 3.20 1.96 0.07 1.24 <br /> March 3.43 3.41 0.11 - <br /> April 1.92 5.10 0.17 <br /> May 0.50 6.82 0.22 <br /> June 0.25 7.80 0.26 - <br /> July 0.23 8.06 0.26 - <br /> August 0.40 7.13 0.23 <br /> September 0.76 5.40 0.18 - <br /> October 1.39 3.72 0.12 - <br /> November 3.31 1.80 0.06 1.51 <br /> December 3.67 0.93 0.03 2.74 <br /> TOTALS(in.) 18.92 53.4 - 8.67 <br /> This chart illustrates that evapotranspiration far exceeds precipitation, even when using higher <br /> rainfall data that exceeds normal rainfall data by 56% (8.30 in. vs. 18.92 in.) Only in the months of <br /> January, February, November and December would deep percolation potentially occur. The data <br /> illustrates a relatively high potential for there to be significant evapotranspiration (or bare soil <br /> surface evaporation) from the filter bed disposal area. <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 Blue Rhino project, wastewater flow volumes will <br /> be conservatively determined. Typically, loading projections are based on the maximum or total <br /> number of employees and customers who may potentially use the toilet/sink, etc. on a workday <br /> basis. Several variables are involved in estimating wastewater flows from a facility. Wastewater <br /> flow volume projections for facilities in unsewered areas have been historically and typically <br /> calculated under numerous guidelines and scenarios, as illustrated in the following list: <br /> 6 <br /> Chesney Consulting <br />