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I t H rates in these areas. For approximate locations of the test holes, see the Tentative Parcel Map in the Appendix. The holes were prepared in accordance with County Standards. Generally the surface soils consisted of heavy loam/rock. The ground had recently been deep ripped prior to planting the vineyard. As shallow percolation tests proved adequate for conventional septic systems, no further soil exploration was necessary. Four percolation tests were performed in holes with 8 inch diameters by 36 inches deep backfilled with 3 inches of gravel. The four holes were filled with water 24 hours prior to running the test. The test holes for Parcels 1 , 2, 3, and 4 were performed under a 4 hour test. The last half hour of the test readings for Parcels 1 , 2, 3, and 4 were witnessed by a County Health Official and the test data obtained is enclosed in the Appendix. Parcel Number Percolation Rate 1 4 inches/hr. 2 2 inches/hr. 3 4 inches/hr. 4 4 inch/hr. VII. GROUNDWATER A Groundwater test was performed on the existing well. The results can be found in the appendix. VIII. CONCLUSION Based on the results of the percolation tests and the soil profile, it is Dillon & Murphy's opinion that the homesites resulting from the proposed parcel split of the subject property are suited for a typical on-site sewage disposal system. The proposed systems, however, should be properly designed and installed according to the current San Joaquin County criteria. It should be noted that the location of the percolation test for Parcel 1 was chosen near the existing disposal field. 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 any new proposed septic system, if properly installed, should not adversely affect the quality of ground water in the area. 2 C:\9939\SOIL SUITABILITY REPORT 110800