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n This chart illustrates that evapotranspiration far exeeeds.precipitation, even when using higher rainfall data that exceeds normal rainfall data by 56%. Only in the months of January, February, November and December would deep percolation potentially occur. ,This data illustrates a relatively high potential for there to be significant evapotranspiration(or bare,soil surface evaporation) from a l wastewater disposal system design that may take advantage of evapotranspiration during favorable� _ months of the year. III. NITRATE LOADING STUDY FINDINGS A. WASTEWATER FLOW VOLUME PROJECTIONS AND CHARACTERISTICS Wastewater Flow Volume Projections To determine nitrate-nitrogen loading from any project;wastewater flow volumes must be determined as accurately as possible. Typically, loading projections are based on the maximum anticipated wastewater flows. These numbers must lie.defined on the Application for a Use Permit. As noted on this Application in Appendix E, 20 worshipers and one employee (21 people) are expected every day except Friday. On Fridays, 294 Worshipers and one employee_ are expected (295 people). - �w It is my understanding there will be no food preparation in the'future Mosque and therefore no kitchen. The San Joaquin County Onsite Wastewater Disposal Standards.assigns 5 gal per person when there is no kitchen in a House of Worship. Therefore, considering the total number of people on a weekly basis, we have: 21 people x 5 galslperson x 6 d/week=.630 gals 295 people x 5 gals/person x 1 d/week==1,475 gals t Total wastewater flow per week= 2;105 Total wastewater flow per year= 2,105.x 52 weeks/yr= 1-09,460.gals/yr Wastewater Characteristics No concentrated organic loading should exist because there will be,no kitchen and a large CM� percentage of the wastewater flows will be wash water. This graywarer.will be from the washing of hands, feet and face before prayer,_ and will have very low' nitrogen concentrations. Blackwater will originate from toilets. Additional wastewater constituentsmay.consist of other liquids to the system. No industrial or commercial chemicals, solvents, etc. should be introduced into the 'wastewater treatment system. From the anticipated characteristics described above, the nitrogen emanating from the project should beat a much lower concentration than what would normally be found in atypical domestic or household system,primarily due to the majority of the wastewater originating from the washing ��, � before prayer. This will create a dilution effect: The scientific literature.cites nitrogen �' concentrations in septic effluent typically ranging from 17 mg NIL for basins; sinks, etc. to 140 mg NIL for toilet-wastes, Chesney Consulting'