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Soil Suitability Nitrate Loading Study Manteca Unified School District 241 4"Street,French Camp,CA Page 3 1.3.5 General Area Septic Permit History Table 2, below, is a summary of septic permits available on the EHD website for properties adjacent to the Site. Table 2 Summary of Adjoining Property Septic Permits Tank Leach Leach Seepage Address Date Permit# Type Size Line Line Pits/Sumps (Gallons) Quantity Length Quantity/Size (Feet) 170 E.2nd 1986 86-923 Septic Tank 1,200 3 70 --- Street 7411 Elm 1992 92-3817 Septic Tank 1,600 2 100 8x4x12 Street 7421 Elm 1993 93-1039 Septic Tank 1,200 3 61,43,37 8x4x8 Street 341 French Camp 1994 SR0004981 Septic Tank 1,200 1 40 15x4x6 Road 7437S 2005 SR0044498 Septic Tank 1,200 Elm Street 7515 Elm 2005 SR0044499 Septic Tank 1,200 Street 301 French 1,800- Camp 2005 SR0043682 Septic Tank --- --- --- Road 2,000 Based on the review of EHD permits, the septic systems in the area appear to use leach lines between 37 and 100 feet in length. Septic permit reports can be found in Appendix C of this report. 1.3.6 General Area Septic Tank Repair History Based on EHD permit review of the surrounding area, permit #SR0004981 shows there was a repair/addition of a 1,200-gallon septic tank at 341 S. French Camp Road, which is a three-bedroom residence. 1.3.7 Proposed or Expected Maximum Septic Tank Usage on Site The design septic tank usage was calculated by MCR Engineering with proposed average daily flow rates for the multi-purposed building estimated at 1,520 gallons per day, based on an average occupancy of 18 students and 1 teacher in each of the 8 classrooms 10 gallons per person/day. The septic design plot plan is shown on Figure 3 (Appendix A) and the proposed usage calculations are included in Appendix D. 1.4 GROUNDWATER INFORMATION 1.4.1 Depth and Gradient of Groundwater in the General Area Subsurface conditions at the Site were determined through geotechnical borings advanced by Condor on April 12, 2019 as well as historical permit information obtained for the Site. During the April 12, 2019 exploration,groundwater was encountered at a depth of approximately 26 feet below ground surface(bgs), but subsequently rose to a depth of approximately 20.5 feet within the hollow stem augers. Groundwater was not encountered in percolation test holes excavated to a depth of 2 and 3 feet bgs on June 25, 2019. rs �•� CONDOR