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Soil Suitability/Nitrate Loading Study 1 ferracon Sun Valley Express Truck Center ■ Acampo, California August 14, 2017 ■ Terracon Project No. NA177026 1.3.5 Septic Permit History in the Vicinity Septic permits on file with the EHD were requested for the adjoining properties surrounding the site. The following table is a summary of septic permits for properties in the vicinity of the site: Table 2. Summary of Adjoining Property Septic Permits. Leach Leach Seepage Address Date Permit Tank Size Line Line Pits/sumps (Gallons) Length (Quantity, Quantity (Feet) Size) • 3957 Peltier Way 2002 SROD30552 2,000 4 50 (4) 4'x 25' 22461 N. Highway 99 2000 SR0024824 1,600 2 60 (4) 3.5'x 25' 22471 N. Highway 99 1970 70-916 1,200 2 80 --- 22342 N. Highway 99 1962 13853 1,200 1 2 80 --- 22342 N. Highway 99 1963 15736 1,200 2 80 --- 22342 N. Highway 99 2012 SR0065688 1,200 1 80 (1) 3.5'x 20' Repair 22220 N. Highway 99 1 1972 72687 --- 2 70 3.5"x 25' 22220 N. Highway 99 1974 74802 11600 — Replacement Based on a review of the EHD permits, the septic systems in the area appear to utilize standard leach lines, and/or seepage pits. Leach lines are between 50 and 80 feet in length and seepage pits are between 3.5 to 4 feet in diameter by 20 to 25 feet deep. 1.3.6 Septic Repair Permit History in the Vicinity Based on the EHD file review, one septic repair permit in the vicinity appears to be for replacement of a septic tank and the addition of leach lines and/or sumps. The septic repair permit SR0065688 can be found in Appendix C of this report. • 1.3.7 Expected On-Site Maximum Septic Tank Usage In response to a SSNLS Questionnaire, Mr. Joe Murphy, of Dillon & Murphy indicated the proposed new trucking business will be open 24 hours per day seven days per week from August to December each year. Mr. Murphy indicated the business will be closed from January through July. There will be up to 12 permanent employees working three eight hour shifts per day (4 employees per shift) and up to 4 visitors and 63 truckers anticipated daily. The restrooms will consist of 4 sinks and 4 low-flow toilets. The septic system design should be based on the San Joaquin County On-Site Wastewater Disposal Standards or other engineering recommendations. Based on a usage of 15 gallons per person per 8 hour shift as specified in San Joaquin County EHD Onsite Wastewater Disposal Standards and the proposed usage, the facility can have a maximum daily usage of 515 gallons per day (15 gallons per 12 employees per day and 67 • Responsive n Resourceful Reliable 6