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Soil Suitability Nitrate Loading Study <br /> Manteca Unified School District <br /> 2414'Street,French Camp,CA <br /> Page 2 <br /> 1.2 PRESENT AND PAST USES OF THE SITE <br /> Condor reviewed the USGS Manteca Quadrangle Map and historical aerial photographs provided by San <br /> Joaquin County Surveyors Office to assess land use in the general area from 1937 to 1975. GoogleEarthTM <br /> aerial photographs were reviewed for years 1993-2017 for more recent information. Based on historical <br /> information, the area surrounding the site has been primarily agricultural with rural housing developments <br /> prior to 1967. <br /> The Site currently consists of French Camp Elementary School. The school was originally built in 1852 <br /> and later rebuilt in 1967. An administration building, library, multipurpose room, and several classrooms <br /> have been added or removed over the years for a total of 36 classrooms. Copies of historical aerial <br /> photographs are included in Appendix B. <br /> 1.3 EXISTING AND PROPOSED SEPTIC TANK USAGE <br /> 1.3.1 Existing On-Site Septic Tank Usage <br /> Condor Earth performed a search of the EHD website for records pertaining to existing septic tanks and <br /> found references to two existing septic tanks onsite. According to historical permits, a functioning <br /> 3,800-gallon septic tank was installed in the western portion of property east of the library in December <br /> 1996, and a 4,000-gallon septic tank was installed in the north portion of the property north of the library <br /> in May 2010. <br /> 1.3.2 Site Septic Permit History <br /> Table 1 <br /> Site Septic Permit Histoir7yfor Address 241 Fourth St. French Camp,CA <br /> Leach <br /> Tank Size Leach Line Seepage <br /> Date Permit# Type Line Pits/Sumps <br /> (Gallons) Quantity Length Quantity/Size <br /> (Feet) <br /> --- --- Shown on SR0011256 Unknown 4? Unknown --- <br /> --- --- Shown on SR0011256 6,000 6 Unknown --- <br /> 1996 SR0011256 Liquid Waste Permit Unknown NA NA --- <br /> old tank filled <br /> 1996 SR0011256 Liquid Waste Permit 3,800 3 60 each --- <br /> Onsite Wastewater <br /> 2010 SR0059994 Treatment System 4,000 4 100 each <br /> Permit <br /> 1.3.3 On-Site Septic Tank Repair History <br /> In 1996, an on-site septic tank was destroyed by being filled in with pea gravel and replaced by a <br /> 3,800-gallon septic tank. Permit#SR0011256 shows a record of the tank replacement. <br /> 1.3.4 Existing Septic Tank Usage in The General Area <br /> To assess septic system density for the vicinity of the Site, Google Maps aerial photos were reviewed to <br /> gauge the number of residencies and agricultural land use. Based on over 70 buildings/residencies within <br /> 0.5 miles of the site it's assumed that at least each building has one septic system. Refer to section 1.3.5 for <br /> description of septic tanks in the general area. <br /> Nt4 <br /> �i� CONDOR <br />