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I. INTRODUCTION Dillon & Murphy was retained by Frank Marschall to perform a Soil Suitability Study for the property located at 16710 E. Sargent Road, Lodi, CA. The subject parcel number is APN 053-110-03. The purpose of the study is to determine the suitability of the property for septic tank usage 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 Marschall property consists of a 80 acre parcel (see appendix for map). It is proposed to divide the 80 acre parcel into 2 parcels. The two resulting parcels will each be 40 acres each. There are no immediate plans for development. III. PRESENT AND PAST USE OF THE SITE Presently, the property is a vineyard and contains an agriculture well at the northwest corner of the property. The property has been a vineyard for over 5 years. There are no homes on the property. IV. EXISTING AND PROPOSED SEPTIC TANK USAGE Presently the parcel contains no septic system. It will require a septic system when developed. I have no knowledge of septic system failure on the property. The recommended septic area for this site is 12,000 square feet. After researching other septic systems installed on properties with a 1 mile radius of this site, it was found that most septic systems have functioned normally, the oldest system being over 30 years old. There was one service request for repair (service request number SR0035527). Systems in this area generally consist of septic tank and leach fields. There are no imminent plans for homesite construction. Once the parcel map is completed, each of the two parcels are entitled to a primary residence and a second unit dwelling. Therefore, the maximum number of septic systems this 84 acres will support is four. See permit numbers 018183 and 018784 for the on-site irrigation/ag well. It was issued April 1 , 1999. V. GROUND WATER AND DEPTH TESTING According to the map of "Lines of Equal Depth of Water Wells" published Fall, 1999, by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater at this location is approximately 140 feet (see Appendix) The gradient ground water (depth) in the project area slopes southeasterly according to the map of lines of equal elevation published in the 1 n•rngaca gnii q RFPnPT nszn,)na