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PROJECT: Ahern Road Fueling February 28, 2022 <br /> Job No: 20-544 Ross P.Shoaf,Civil Engineer <br /> Location: 29700 Ahern Road,Tracy, CA A.P.N. 255-020-140 <br /> Advantek AX100 Onsite System for a Fueling on Ahern Road in San Juaquin County <br /> This system is being proposed for its Nitrate reduction capabilities to comply with the <br /> reduced Nitrate loading required for the area. A Nitrate study was performed by Live Oak Geo <br /> Environmental; Inc. and it was found that the nitrate loading from a standard onsite system at <br /> that location could potentially result in a discharge up to 5 times higher than the allowable <br /> Nitrate Drinking Water MCL of 10 mg/L. After treatment the effluent will be discharged by <br /> pressure dosing to a system of 27" deep gravel filled trenches. �S" UY <br /> The design Load for this facility is being based on San Juaquin County flow standards and <br /> information from the owner. A preliminary calculation was provided by GSV Consulting. That <br /> load is broken down as follows: <br /> 1. Projected flows for customers L� <br /> i. 630 Vehicles/day <br /> ii. 10 gallons/vehicle � <br /> iii. 6,300 total <br /> S0� <br /> b. Employees 5�4 � JQ� <br /> i. 30 gallons/employee \ 0 <br /> \ <br /> ii. 5 employees <br /> iii. 150 gallons/day <br /> 2. The total estimated daily load this design is being based on a 6,450 gallons/day <br /> maximum load with a 3,225 gallons/day average load. It will consist mainly of <br /> domestic type water with a small amount incidental food prep waste. <br /> 3. These flows correspond to the design loads and reported usage at a similar Truck Stop <br /> located at the intersection of State Highway 119 and State Highway 5 in Bakersfield. <br /> The size of the leach field is based on the average percolation rate of 3 tests performed within <br /> the disposal field area by Live Oak Geo Environmental; Inc.. The average of the 3-percolation <br /> tests is 10.13 mpi. That percolation rate when cross referenced with the application rate chart <br /> in the State OWTS manual allows an application rate between .786 and .8 gal/sf/day. The <br /> slower of the two rates will be used for design purposes. <br /> Page 3 Of 11 <br />