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rCI.-I,oANTZSCMEIFINNEMOREE UATIONFOR REMAINING 39% OF <br /> NVENTIONAL SEPTIC SYSTEM WASTEWATER <br /> INw(1 - d) +RNb <br /> Nr= (I+R) <br /> Values and Assumptions <br /> I= 435 gal/d x 260 d/yr= 113,100 gals =conventional WW/yr= 15,120 cu ft = 0.55 in. <br /> 7.53 Ac x 43,560 sq ft/Ac = 328,007 sq ft <br /> Nw = 103 mg NIL: 20% reduction from septic tank+ 10% removal from biomat= 74 mg NIL <br /> d = Assume 30% <br /> R = 10 in/yr. But 80% of total area covered w/roofs and asphalt .•. 2 in/yr. <br /> Nb= Assumed to be 0.1 ppm NO3-N <br /> y 0.55 in/ 74 mg NIL (1 - 0.30)(2 in/yr x 0.1-mgU <br /> Nr = (0.55 in/yr+ 2 in/yr) <br /> b <br /> Nr = 11.3 ppm as nitrate-nitrogen (NO3-N) or 50.6 ppm as nitrate (NO3) <br /> PREDICTED NITRATE-NITROGEN LOADINGFROM COMPLETED PROJECT OF 61% <br /> TREATED WASTEWATER AND 39% CONVENTIONAL SEPTIC SYSTEMS FLOWS: <br /> 1.2 ppm NO3-N+ 11.3 ppm NO3-N= 12.5 ppm NO3-N in comparison to the entire project on <br /> conventional septic systems: 12.5 ppm NO3-N vs'. 21.5 ppm NO3-N(42%reduction) <br /> C. SEPTIC SYSTEM COMPONENTS <br /> The design of a fixture septic system for the facility is based upon the factors of operation, <br /> longevity, and environmental protection. The Sari Joaquin County Environmental Health <br /> Department will stipulate design requirements for`environmental protection. <br /> SEPTIC TANKS <br /> Since development north of Carmelo Avenue is on six separate septic tanks and leachfields, <br /> 4 septic tank design criteria can only be establish or existing and proposed development south <br /> of Carmelo Avenue. The following septic tank volume criteria is based on conventional systems, <br /> and may or may not apply to the proposed MicroSepTec® wastewater treatment system. <br /> Chesney Consulting <br /> f <br />