Laserfiche WebLink
Percolation Test and Soils <br /> The soil is Hanford Sandy Loam and per the "Soils of San Joaquin <br /> County" as published by the University of California , it is the <br /> predominate soil in the area . <br /> Within 200 feet of the West property line of the site the farmer <br /> was removing an old concrete irrigation line. I observed <br /> trenches up to 4 feet deep. The soil was homogeneous . <br /> When drilling holes for the percolation tests we encountered the <br /> plow pan , which is typical of this area at approximately 1 foot <br /> deep and per the percolation results we appear to have broken <br /> through it at 3 feet deep. <br /> A b inch diameter by 3 foot deep hole was dug on the site of <br /> each of the three parcels . Under the supervision of the San <br /> Joaquin County Health Department , percolation tests were run in <br /> each hole (See Exhibit 3) . The percolation rates varied from 48 <br /> to 12 minutes per inch. This is in keeping with Sheet 8 of the <br /> "Soils of San Joaquin County" which shows a island of "Handford <br /> Sandy Loam" , poorly drained at the site of slowest percolation <br /> test . The site yielding a percolation rate of 12 minutes per <br /> inch is considered as a local anomaly . <br /> Per Health Department requirements and engineering judgement , <br /> the recommended leach field area for Parcel 1 is 12,000 S.F. and <br /> 10,000 S.F . for Parcels 2 and 3. <br /> The above recommendation is in agreement with the septic tank <br /> suitability study for "Acampo Village" Subdivision which is <br /> immediately East of this site. <br /> Water Gradient <br /> The interviews and soundings yielded data , is in agreement with <br /> the San Joaquin County Flood Control and Water Conservation <br /> Study (See Exhibit 2) . The sounded well as previously discussed <br /> is 5 to 8 feet higher than Woodbridge Road , so the local ground <br /> water gradient is approximately five feet per half mile in a <br /> southerly direction . <br /> Conclusion <br /> Based upon the results of the percolation test , the past history <br /> of septic systems in the area , and the groundwater depth, it is <br /> my opinion that this property is suitable for septic-leach line <br /> systems which should not be detrimental to the quality of ground <br /> water in the area . <br /> For specific leach field sires 1 recommend 12,000 S.F . for <br /> Parcel 1 and 10,000 S .F. for Parcels 2 and 3. <br /> 2 <br />