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7reventually <br /> on rates obtained suggest an acceptable soil permeability at both the traditional <br /> h of 42 inches and the typical sump depth of 7.5 feet. Although the hydraulic <br /> of the surface soils exhibited an excellent application rate of 28.2 gallons/ft2/day, <br /> gement, and therefore design criteria may be based on the permeability of the soil <br /> ching a long term application rate (LTAR) of approximately 0.5 gallons/ft2/day due <br /> to biomat formation. It is imperative that a 100%replacement area be designated in the event a <br /> repair is required or an additional system installed. <br /> Regarding domestic water for APN 190-230-08, the number of people cannot exceed 23, for 60 <br /> days per year for the water supply to remain private. Otherwise, the water supply must be <br /> considered a public water supply. The Environmental Health Department issues the standards for <br /> public water supplies. This study detennined that Total Dissolved Solids (TDS)may be of a <br /> concern with water from the deeper aquifers. <br /> As discussed, it is probable that the City of Lathrop will have water and sewer serving the subject <br /> properties within this decade. This would certainly alleviate nitrate loading from on-site and <br /> surrounding septic systems. <br /> Mounding effects under the leachfield areas are of a very slight concern since the water table <br /> saturated zone is approximately 13 feet below grade. Under severe climactic stress, percolating <br /> rainwater may pool on top of the saturated zone, inducing a mound. <br /> Accurate "as-builts" of the septic systems to be installed in the future must be supplied to the <br /> Environmental Health Department and all applicable "distance" requirements must be strictly <br /> followed. <br /> 14 <br /> Ckemq Consulting <br />