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ADDENDUM REVISED SOIL SUITABILITY/NITRATE LOADING STUDY FRENCH CAMP ELEMENTARY SCHOOL 241 FOURTH ST., APN 193-110-13 FRENCH CAMP, CALIFORNIA This revised report (addendum) includes the results of a Soil Suitability/Nitrate Loading Study for Manteca Unified School District’s (MUSD) French Camp Elementary School Modernization Project located at 241 Fourth Street in French Camp, California (the Site). Figure 1 (Appendix A) presents a Vicinity Map of the Site, Figure 2 (Appendix A) presents a Site Map/Aerial Photograph, and Figure 3 (Appendix A) presents the Sanitary Sewer Design. 1.0 SOIL SUITABILITY STUDY 1.1 INTRODUCTION The Soil Suitability Study (SSS) was conducted to determine whether Site soils are suitable for expansion of the septic system as part of the French Camp Elementary School Modernization Project. The SSS was performed pursuant to requirements of Section 9-1105.2(d) of the San Joaquin County Development code and has been prepared to meet the requirements of the San Joaquin County Health Department’s (EHD’s) Soil Suitability Study Requirement Checklist (dated 9/25/07). A major element of the field work included conducting percolation tests that meet absorption rates as specified by EHD. A review of published soil information, geologic maps, and available groundwater information was also conducted. 1.1.1 Description of Site, Including Zone Information The French Camp Elementary School property is located in the northern San Joaquin Valley approximately 8 miles northwest of Manteca. The school property consists of 14 contiguous parcels totaling 13.91 acres. The school site is generally rectangular in shape and surrounded by mixed agriculture and rural residential development. The Site elevation is approximately 16 feet above mean sea level and the land is relatively flat (less than 2 percent slope). The topographic gradient slopes gently west toward the San Joaquin River approximately 3 miles away. A map showing the contiguous parcels is included as Figure 4 in Appendix A. 1.1.2 Description of Proposed Development We understand the proposed project will include a new multi-purpose building of 11,300 square feet with 8 classrooms, learning commons, student and staff restrooms, and an additional septic system. An aerial photograph showing Site features and the proposed layout for the French Camp Elementary School new building locations and septic system are presented on Figures 2 and 3, Appendix A. The school has an existing student enrollment plus staff of 644, which is not projected to increase as a result of the project. 1.1.3 Parcel Vicinity Location Map See Figure 4, Appendix A. 1.1.4 Site Map Showing Location of All Items on Parcels (i.e., Structures, Drives, Wells, Septic Systems, Large Trees, Pastures, Pools, Natural Drainage Courses, Ponds, Waterways, Etc.) See Figure 2 and 3, Appendix A.