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v � NIXON/LOVATO PROPERTY Page No. 4 appendix. The percolation rates have been adjusted to account for the gravel and pipe backfill. Calculations for adjustments are on the test data sheets. A summary of the test results is presented next: Diameter of Depth of Test No. Hole (in. ) Hole (ft. ) Percolation Rate (min/in) PT-1 4. 5 18.0 4. 4 PT-2 4. 5 22.0 6.2 VII CONCLUSION Based on the results of the percolation tests, the soil profile, and the performance of the septic systems in the area, it ' is our opinion that the homesites resulting from the proposed parcel split should be suitable for use of on site sewage disposal systems. Recommended systems should include both shallow leach lines and dry wells. It is also recommended that grading be performed to provide positive drainage away from proposed leach fields to prevent trapped subsurface water from building up in the leach field area during the winter. Any proposed system should be properly designed and installed according to current San Joaquin County criteria. Based on the depth to ground water in the area, and the size of the proposed parcels, it is our opinion that the installation of the proposed septic system, if properly 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 existing and proposed development, the use of the subject property, and the site conditions as they existed at the time we excavated our test holes and performed the percolation tests. It was assumed that the test holes and percolation tests results are representative of the subsurface conditions in the general area. Our professional services were performed, our findings obtained, and our conclusions proposed in accordance with generally accepted engineering principles and practices. This warranty is in v pERsO� D 1 W Q ~ 9S5O G� P