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Iftw -..We <br /> F22� <br /> MAXIMUM NUMBER OF PEOPLE THE SUBJECT PROPERTY CAN SUPPORTOUT EXCEEDING THE MAXIMUM CONTAMINANT LEVEL FOR NITRATE= <br /> HANTZSCHEIFINNEMORE EQUATION <br /> Values and Assumptions <br /> 1=92 people x 15 ga`/person/d x 260 work d/yr=358,800 gals=total WW/yr=47,968 cu ft= 1.75 in/yr <br /> 7.55 Ac x 43,560 sq ft/Ac x (1 ft/12 in) <br /> Nw= 103 mg N/L <br /> d = Assume 20% due to a fine-grained soil <br /> R = 13 in/yr. <br /> Nb= Assumed to be 0.1 ppm NO3-N <br /> 1.75 in/yr(103 mgN/L) (I - 0.20) + (13 in/yr x 0.1 mg/Ll <br /> Nr = (1.75 in/yr+ 13 in/yr) <br /> Nr = 9.9 ppm as nitrate-nitrogen (NO3-N) or 43.9 ppm as nitrate (NO3) <br /> For comparison with a residential use of the property: Consider four houses to the acre built on <br /> this parcel and each house had an average of 3.5 people, the total number of people on the subject <br /> parcel would be: 3.5 people x 4 houses x 7.55 ac= 106 people. <br /> C. SEPTIC SYSTEM COMPONENTS <br /> The design of future septic systems for this parcel is based upon the factors of operation, <br /> longevity, and environmental protection. The San Joaquin County Environmental Health <br /> Department will stipulate design requirements for compliance with these factors. Septic system <br /> designs approved by the Health Department have included denitrifying septic tanks, dual septic <br /> tank systems, recirculating sand filters, mound systems, innovative filter beds and shallow <br /> leachfields. <br /> SEPTIC TANKS <br /> Septic tanks affect the sludge, scum and effluent volumes, which in turn affect treatment of <br /> nitrogen within the tanks. Typically, the volumetric capacity of septic tanks serving commercial <br /> facilities should be equal to approximately 5 times the average daily flow (ADF or QAVE). In the <br /> following example, a pump-out interval of three years has been used in the calculations. The <br /> peaking value is normally taken to be 1.5 for commercial projects. Since the A.M. Stephens <br /> Construction Company is proposed to move onto the property, and the other business are <br /> established, only the A. M. Stephens Company information will be used in the following examples: <br /> 11 <br /> Chesney Consoling <br />