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Generally the surface soils consisted of a sandy clays and clayey sand. As shallow percolation tests proved inadequate for conventional septic systems, deep percolation tests were performed. Shallow Test One percolation test was performed in a hole with 8 inches in diameter by 42 inches deep backfilled with 2 inches of gravel. The two holes were filled with water 24 hours prior to running the test. The test holes for Parcel 1 and Parcel 2 were performed under a 4 hour test. The last half hour of the tests reading for Parcel 1 were witriessed by a County Health Official and the test data obtained is enclosed in the Appendix. .,,. 07 � _ Parcel Number Percolation Rate 7� !�y�oA- y 1_ 80 min./in. / _ ,Gly' ✓�a�/� 2 0 min./in. Deep Test ^ Neil O. Anderson and Associates was retained to perform the deep tests. \I See the appendix for their results. As the holes encountered water after the 24 ` hour pre-soak, Anderson recommends engineered systems when new septics are installed. VII. GROUNDWATER A Groundwater test was performed on the adjacent property well. The well was tested for nitrates and DBCP. The samples were taken by Mike Toy of Dillon & Murphy and driven directly to Precision Enviro-Tech. Water was taken from a spigot at the house. The results can be found in the appendix. The results did not yield any reason of concern regarding groundwater in the area. VIII. CONCLUSION Based on the results of the percolation test and the soil profile, it is Dillon & Murphy's opinion that the existing homesite resulting from the proposed parcel split of the subject property are suited for an engineered on-site sewage disposal system. The soil type and lithology is homogenous in the immediate area and leach lines with pits have worked sufficiently. The proposed system however, should be properly designed and installed according to the current San Joaquin County criteria. 2 CA01116\SOILS REPORT 082703