Two new leach fields would be constructed to filter wastewater from the ranch facilities (Figure 2.14, “Proposed Utilities Plan”). The size of the leach field(s) would ultimately depend on soil percolation and the anticipated wastewater flow rates. The system would consist of PVC collection pipe to direct the wastewater via gravity to a septic tank or pre-treatment tanks. The pre-treated water would then flow into a series of infiltrator trenches or pipes to percolate into the soil.

Leach field construction would include trenching for the pipes and a larger trench for the septic tank(s). The infiltration trenches are partially filled with washed gravel wrapped in fabric to keep soil and gravel separate, which provides voids to hold water while it percolates into the soil, then they are backfilled with native material. The excess native soil material removed for leach field trenching would be used as fill elsewhere on the site, depending on the properties and needs for the material.