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I. BACKGROUND <br /> GENERAL <br /> This report outlines septic system designs for each of the fifteen lots of this proposed <br /> subdivision. These recommendations rely heavily on the existing Report of <br /> Investigation, On-Site Waste Water Disposal System Requirements, April, 2005. <br /> System types herein range from engineered gravity to pressure-dosed systems. All <br /> systems were figured for a 4 bedroom size, but could be proportionately increased or <br /> decreased depending upon number of actual bedrooms for each house. <br /> Pump-up systems will discharge into a °D" box. Pressure-dosed systems will each have <br /> valve box cluster to control flow to each line. Pits at end of leachlines (Lot 4) shall be <br /> 36 inch diameter and of regular San Joaquin County construction. <br /> Replacement systems shown need to be installed for "dual" system for each lot in <br /> addition to initial systems. This means that "Bull Run"-type diverter valves are to be <br /> used on gravity systems to alternate flow every six months back and forth. Pressure <br /> systems will require either a "Hydrotek valve" or electromechanical valve to alternate <br /> initial system with so-called repair system. <br />