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Soil Suitability Study Irerracon Flag City#4 Lodi, California February 14, 2019 Terracon Project No. NA187043 Leach Tank Size Leach Line Line Seepage Pits, Direction Address Permit# Type (Gallons) Quantity Length Sumps,Filter Beds,Other (Feet) North 5136 W.Hwy 12 SR0061496 New Install 1,200 --- --- 23.5'x 62'filter bed North 5184 W. Hwy 12 75-361 New Install 800 2 50 --- 93-0685 Repair --- 1 40 4.51x10'x25'pit North 5400 W. Hwy 12 --- --- --- --- --- --- SR0003775 New Install 2,000 3 100 --- East 5100 W.Hwy 12 SR0009086 New Install 1,500 ___ Separator closed system SR0039945 New Install 1,200 5 100 --- East 5112 W.Hwy 12 SR0022946 New Install 1,600 4 100 --- South 5281 W.Kingdon SR0000809 Repair 1,600 2 50 --- 19689 New Install 1,200 3 80 --- South 5465 W.Kingdon 72-641 New Install 1,200 2 80 SR0075220 Repair --- 2 100 South 1 5545 W.Kingdon 1 79-675 New Install 1 1,600 3 100 Based on a review of the EHD permits, the septic systems in the area appear to primarily utilize standard leach lines between 40 and 100 feet in length. Filter beds, sumps up to 10 feet deep, or seepage pits up to 25 feet deep are additionally utilized in the area. 3.6 Septic Repair Permit History in the Vicinity Based on the EHD file review, septic repairs in the vicinity appear to be for replacement of septic tanks and the addition of leach lines, sumps, and/or seepage pits. The septic repair permits can be found in Appendix C of this report. 3.7 Expected On-Site Maximum Septic Tank Usage Based on a review of the Nitrate Loading Study (NLS), Flag City #4, dated September 20, 2018 prepared by Terracon, we understand the project will consist of a truck terminal and will be open 10 hours per day six to seven days per week year round. There will be up to 20 permanent employees working 10 hour shifts and up to 30 visitors and 21 truckers anticipated daily. The restrooms will consist of 2 sinks and 4 low-flow toilets. The NLS reported 15 gallons per day is typical for each employee and 5 gallons per day for visitors,when utilizing a low-flow flush system. The NLS estimated the potential sewage flow rate for the proposed development is 555-gallons per day. 4.0 GROUNDWATER INFORMATION 4.1 Groundwater Depth and Gradient Based on a review of the San Joaquin County Flood Control and Water Conservation District (SJCFCWCD) Groundwater Reports website, from 2015 to 2016, Spring & Fall depth to groundwater near the site was reported between approximately 20 and 40 feet below ground surface (bgs). Based on a review of groundwater data available on the California Department of Responsive ■ Resourceful ■ Reliable 6