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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 /> 1.3.5 Septic Permit History in the Vicinity <br /> Terracon searched the EHD Public Records website for the adjoining property septic permits.The <br /> following table is a summary of septic permits available for the adjacent and nearby properties: <br /> Table 3. <br /> Summary of Adjoining Property Septic Permits. <br /> Leach Leach #Seepage Pits, <br /> Direction Address Permit#/ Type Tank Size Line Width,Depth <br /> Year (Gallons) Line Length <br /> Quantity (Feet) (Feet) <br /> North None NF --- --- --- --- --- <br /> East 11040 E. Mariposa Rd NF --- --- --- --- --- <br /> South None NF --- --- --- --- --- <br /> West 10920 E. Mariposa Rd <br /> 89-2737/ Septic 1,600 3 100 --- <br /> 1999 Repair <br /> 18975/ Septic 800 1 90 One 2.75 w x 25 d <br /> 1965 Install <br /> 80 feet 10880 E. Mariposa Rd 19502/ Septic 1,200 2 75 Two 2.75 w x 25 d <br /> West 1965 Install <br /> 85-321/ Septic <br /> 1985 Repair 1 65 One 2.75 w x 25 d <br /> NF—No septic permits found, LL—leach lines <br /> Based on a review of the permits, the septic systems in the area appear to utilize 65 to 100-foot <br /> long leach lines with or without 25 foot deep seepage pits at the end of each leach line. <br /> 1 .3.6 Septic Repair Permit History in the Vicinity <br /> Septic repairs in the vicinity appear to be for the addition of leach lines with or without 25 foot <br /> deep seepage pits. Copies of selected septic permits can be found in Appendix C of this report. <br /> 1.3.7 Expected On-Site Maximum Septic Tank Usage <br /> The total maximum daily septic tank usage for the site was calculated based on the EHD <br /> recommended daily use rate of 70 gallons per day (gpd) per bedroom multiplied by two people <br /> per bedroom. Refer to the table below for expected on-site maximum use rates. <br /> Table 4. <br /> Expected On-Site Maximum Septic Tank Usage <br /> Number of people per Average effluent Maximum Septic <br /> Residence Number of bedrooms bedroom quantity per person Tank Usage <br /> (gpd') (gpd*) <br /> Existing Residence 2 2 70 280 <br /> Proposed Mobile 2 2 70 280 <br /> Responsive ■ Resourceful ■ Reliable 6 <br />