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..i NIXON/LOVATO PROPERTY Page No. 3 V. GROUND WATER DEPTH AND TESTING According to the map of "Lines of Equal Depth to Water in Wells" published spring 1994 by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater at this location is between 120 and 130 feet. There is a domestic water located in the middle of the proposed parcel 2 that was installed in 1990 . The well is currently not supplied with power and is not operational. The water from a neighbors well, located 300 yds to the west was sampled on January 11, 1995 and tested for the presence of nitrates And dibromochloropropane (DBCP) . Test results indicated that both nitrates and DBCP were both non-detected. A copy of the test results are included in the Appendix. VI . SOIL PROFILE AND PERCOLATION TESTS It was initially attempted to excavate by hand two soil profile holes to a depth of 10 feet. Cemented soils or "hardpan" were encountered at a depth of 2 feet and the excavations were terminated. At the time of our field work water was ponded in many of the low areas on the property. This water appeared to be trapped due to the shallow depth of the hardpan. Subsurface water that was trapped on top of the cemented soils seeped into our test holes, which terminated at the hardpan. it was apparent that shallow percolation tests would not be acceptable and that deep pit percolation tests were necessary. Two, 4.5 inch diameter test holes were drilled to 18 feet on parcel 1 and 22 feet on parcel 2 . The test holes were logged by an engineer and a description of the soils encountered is presented in the appendix. A slightly silty sand stratum was encountered from 14 to 18 feet in test hole #1 and from 19 to 22 feet in test hole 12. Deep pit percolation tests were performed in this sand stratum. For a more detailed description of the soils encountered see the log of test holes. Percolation tests were set up by placing 2 inches of gravel and a 3 foot section of 2 inch diameter perforated pipe in the bottom of each test hole. Solid pipe was then used to the surface. The perforated pipe was backfilled with gravel and the solid pipe with bentonite clay. The purpose of the bentonite seal was to prevent the infiltration, into the test holes, of shallow subsurface water trapped on top of the hardpan. Each of the tests holes were filled with water 24 hours prior to running the tests. The last half hour of the tests readings were witnessed by a county health official and the test data obtained is enclosed in the P pERyOh D �^ Z "� O �` P QSS pC�