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I. INTRODUCTION Dillon & Murphy was retained by Mary Telles, to perform a soil suitability study for the Telles property located at 13021 S. Airport Way, Manteca, CA 95336. The subject parcel number is APN 195-040-08. The purpose of the study is to determine the suitability of the property for septic tank usage as well as testing the groundwater for certain chemicals as required by the County. The study was performed according to the requirements of Section 10100 of San Joaquin County Development Code. II. PROPOSED DEVELOPMENT The property is currently zoned AG-40. The Telles property consists of a 2.5 acre parcel and a remainder parcel (see appendix for map). There are two existing homesites on the 2.5 acre parcel being created. III. PRESENT AND PAST USE OF THE SITE The past and present use of the land has been homesites and agricultural. IV. EXISTING AND PROPOSED SEPTIC TANK USAGE There are existing septic systems that service the existing homes. In speaking with the people currently living on the site and the surrounding property owners, there have been no problems with septic systems. V. GROUND WATER AND DEPTH TESTING According to the map of "Lines of Equal Depth to Water Wells" published fall, 1990, by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater at this location is approximately 25 feet. See the appendix for the ground water gradient. There is an existing well on Parcel 1 as shown in the appendix. This well was tested for DBCP and nitrates three years ago (see appendix for results). No further testing was necessary. VI. SOIL PROFILE AND PERCOLATION TESTS One test hole was excavated to a depth of 3.0 feet in the area of the homesite. The purpose of the test hole was to determine percolation rates 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. 1