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[7] CONCLUSIONS <br /> The results of the shallow percolation test performed on the subject parcel indicate a very fast rate <br /> of 5.0 min/in. <br /> Although this perc rate translates to a recommended sewage disposal area of 6,000 square feet, it will <br /> be a requirement of the Environmental Health Department that the size of the septic tank and <br /> leachfield be dependent upon the number of bedrooms the structure will have. Unless unusual soil <br /> conditions are encountered during leachfield installation, such as clayey or silty soils, there will be no <br /> need for sumps. If a residence is to be built at any other location on the subject parcel, we <br /> recommend percolation testing for that specific location. <br /> Recommendations for sewage disposal areas and related septic structures such as leachfield areas and <br /> sumps are primarily a protection measure of the underlying groundwater and potentially the Stanislaus <br /> River. <br /> As noted above, the water table is approximately 40 feet below the soil surface. Therefore, the <br /> groundwater level in this area is well below the ten foot minimum distance between the bottom of the <br /> leachfield depth (42 in), and the highest anticipated depth to groundwater, as of the date of this <br /> report. <br /> Based upon the documented information from the percolation testing procedures and the highest <br /> anticipated depth to groundwater, there should not be any adverse impact to the quality of the local <br /> area surface water or groundwater from a proposed septic system. Due to the very low density <br /> housing in the area of the proposed residence, nitrate impact is highly unlikely from these sources. <br /> However, nitrogen application at rates exceeding crop uptake has a much more profound effect on <br /> nitrate concentration in the underlying groundwater than would local septic systems. <br /> 5 <br /> �t (").11ty Control Inspection <br />