SU0001157 SSNL - Laserfiche WebLink

Home Browse Search

A percolation test was performed in the area where the proposed leach field would most likely could be located (rear of old house). For approximate location of the percolation test see the Tentative Parcel Map in the Appendix. The percolation test was performed in an 8 inch diameter by 36 deep test hole. A 3 inch diameter perforated pipe measuring device was placed in the test hole and backfilled with 3/4 inch gravel. The hole was filled with water 24 hours prior to running the test. The last ten minutes of the test readings were witnessed by a San Joaquin County health official and the test data obtained is contained in the Appendix. The results of the test indicate that the soil at the proposed homesite on Parcel 1 had a percolation rate of 2.5 minutes/inch. VII CONCLUSION Based on the results of the percolation test, the soil profile, and the performance of the septic systems in the surrounding area, it is our opinion that the new parcel and subsequent homesite resulting from the proposed parcel split of the subject property is well suited for the construction of a typical on-site sewage disposal system. The proposed system however, should be properly designed and installed according to current San Joaquin County criteria. The old system that exists on the proposed parcel 1 should not be utilized as it appears close to failure due to silting. It should be noted that the location of the percolation test was chosen as the most likely location for a disposal field. Although it is not anticipated that soil conditions vary greatly over the subject site, if the actual location of a proposed disposal field varies significantly from the test location, the test data should not be considered accurate of other locations. Based on the depth to ground water in the area and the size of the proposed parcel, it is our opinion that the installation of the proposed septic systems, if properly designed and installed, should not adversely affect the quality of the ground water in the area. VIII LIMITATIONS The conclusions of this report are based on the information provided regarding the proposed development, the use of the subject property, and the site conditions as they existed at the time we excavated our test pits and performed the percolation test. It was assumed that the test pits and percolation test results are representative of the subsurface conditions in the general area. �1E RSO 4 P ti D Q ~ 9SSOC\ P