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Soil Suitability/ Nitrate Loading Study Addendum Irerracon <br /> Arriaga Property Stockton, California <br /> August 31, 2020 Terracon Project No. NA207046 <br /> 1.3 Existing and Proposed Septic Tank Usage <br /> 1.3.1 Existing On-Site Septic Tank Usage <br /> Based on information provided by the owner, the existing onsite residence is currently developed <br /> with one septic system. The size and design of the system was not known. <br /> 1.3.2 Site Specific Permit History <br /> Terracon searched the EHD Public Records website and the following EHD permits associated <br /> with the site address were identified. <br /> Table 2. <br /> Summary of Site-Specific Permits. <br /> Leach <br /> Permit# Type/ Tank Size Leach Line Line Seepage Pits, <br /> Parcel Addresses Sumps,Filter <br /> (Year) Location (Gallons) Quantity Length Beds,Other <br /> (Feet) <br /> SR0017247 <br /> Pump Repair --- --- --- --- <br /> (1998) <br /> 10966 E. Mariposa Road SR0070439 <br /> Pump Repair --- --- --- --- <br /> (2014) <br /> There were no septic permits available for the site address. <br /> 1.3.3 Discussion of On-Site Septic Tank Repair <br /> There were no septic repair permits available for the site address. Based on the San Joaquin <br /> County color coded map available at the EHD office and review of the San Joaquin County Onsite <br /> Wastewater Treatment Standards (OWTS), the site is located in a clay area of the county where <br /> leach lines and seepage pits are permitted (page 28 of 40, Table 9.7.1). <br /> 1.3.4 Existing Septic Tank Usage in the Vicinity <br /> In an attempt to determine the septic system density for the vicinity of the site, our office reviewed <br /> a recent aerial photograph of the property available from GoogleEarthTM. The vicinity of the site <br /> consists of agricultural land and rural residences. The assumption was made that each <br /> building/cluster of buildings has one septic system. Using this method, we determined there are <br /> approximately 22 septic systems within 0.10 miles of the site. <br /> Responsive ■ Resourceful ■ Reliable 5 <br />