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in this area. For approximate location of the test hole, see the Tentative Parcel Map in the Appendix. The hole was prepared in accordance with County Standards. i Generally the surface soils consisted of a sandy loam.7As a shallow percolation test proved adequate for conventional septic systems, no further soil { exploration was necessary. One percolation test was performed in a hole with a 9 inch diameter by 36 inch deep hole backfilled with 3 inches of gravel. The hole was filled with water 24 hours prior to running the test. The test hole for Parcel 1 was performed under a 4 hour test. The last half hour of the test readings for Parcel 1 was witnessed by a County Health Official and the test data obtained is enclosed in the Appendix. I Parcel Number Percolation Rate 1 10 114 inches/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 test and the soil profile, it is Dillon & Murphy's opinion that the proposed homesite resulting from the proposed parcel split of the subject;property is suited for a typical on-site sewage disposal system. The proposed system however, should be properly designed and installed d according to the current San Joaquin County criteria. j It should be noted that the location of the percolation test for Parcel 1 was chosen near the proposed disposal field. I i { It is our opinion that the installation of any new proposed septic system, if 1 properly designed and installed, should not adversely affect the quality of ground water in the area. Conventional systems are presently being utilized in this area. The nitrates measured in this area (see appendix) are well within acceptable levels. i 2 f i C:10136 Hayes Soils Report 073001