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11655 S UNION ROAD Project No. 2020-00095 Page 12 1.1 Description of Site The property is located at 11655 S Union Road (APN: 204-030-07), Manteca, County of San Joaquin, California. The parcel is approximately 0.77 acres of land. There is currently one single-family residence with three bedrooms and one bath located in the northwest portion of the site; one 800-gallon septic tank with one leach line is located on the site to serve the current residence, which was built in 1957. The property is located in a rural residential neighborhood, with French Camp Road approximately 0.65 miles north and Highway 99 approximately 1 mile east of the site. The general vicinity consists of rural residential lots and agricultural use. The elevation at the site, according to a United States Geological Survey2, is approximately 30 feet above mean sea level (ms1). The site is relatively flat, with topography in the area grading gently to the west. According to the San Joaquin County District Viewer web site,3 the subject property is zoned AG-40. Location maps of the subject property are attached to this report as Appendix A. 1.2 Proposed Development The property currently consists of 0.77 acres of land with a primary 3-bedroom, 1-bath residence with a 800-gallon septic tank and associated leach line. The project proposes to build a two-bedroom, one-bath, single family manufactured home with a seperate onsite septic system; there is currenly one domestic well in use. The tentative parcel map showing the location of the existing residence and septic system, the existing well, and the proposed secondary dwelling unit and septic system is included as Plate 3, in Appendix A. 2.0 PAST, PRESENT AND PROPOSED FUTURE USES Present use consists of a single-family home and a septic system with an 800-gallon septic tank installed under permit (Permit No. 10-296) in 1958 and a domestic well. Proposed future use is a two-bedroom, one-bathroom accessory dwelling unit with a proposed new septic system. 3.0 GEOLOGIC AND SOIL PROFILE INFORMATION 3.1 Chemical and Physical Soil Properties The site is depicted on the Geologic Map of the San Francisco-San Jose quadrangle 4 and falls within the Modesto Formation (Plate 4, Appendix A) herein called Qm. Qm is an alluvium derived unit derived from granitic sand, silt, and clay. 2 US Geological Survey, 2018, 7.5' Topographic Map, California, Manteca Quadrangle. 3 San Joaquin County District Viewer, http://sjmap.org/website/DistrictViewer/Viewer.asp. 4 Wagner, DL., Et. Al. Geologic Map the San Francisco-San Jose quadrangle, . 2006. Petralogix Engineering, Inc. 26675 Bruella Road, Galt, Ca 95632 (209)-400-5729 www.petralogix.com