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Soil Suitability/ Nitrate Loading Study 1�err�con <br /> Avanti Nut Co. ■ Stockton, CA <br /> May 19, 2016 ■Terracon Project No. NA167038 <br /> Average rainfall was obtained from the Western Regional Climate Center(Station 048560)for the <br /> east Stockton area. <br /> Table 3. <br /> Estimate of Deep Percolation of Rain for the Site <br /> Location Deep Percolation of Rain <br /> Stockton 4.37 inches <br /> Based on this method, the average deep percolation of rain forthe east Stockton area is estimated <br /> to be 4.37 inches/year. The nitrate concentration of rainfall is estimated to be 1 mg/L-N <br /> (Hantzsche and Finnemore, 1992). <br /> 2.3.3 Current On-Site Sources of Nitrate <br /> The current on-site sources of nitrate include natural processes. <br /> 2.3.4 Future On-Site Sources of Nitrate <br /> Future on-site sources of nitrate are discussed in section 1.3.7. <br /> 2.3.4.1 Quantity and Quality of Wastewater from Project <br /> The following discussion is for determining the long-term wastewater flow generated from the <br /> proposed construction We understand that the project will consist of an approximately 18,000 <br /> square foot warehouse with restroom. The restroom includes one toilet, urinal, and, one sink and <br /> will service a maximum of four permanent employees per day; no visitors are anticipated. We <br /> understand that the facility will be open between eight and ten hours per day, six days per week. <br /> The estimated sewage flow rates for use categories are available from a number of references. <br /> The uses presented below were guided by the San Joaquin County On-Site Wastewater Disposal <br /> Standards (2003), Crites and Tchobanoglous (1998), and EPA (1980). The references indicate <br /> that 15 gallons per day is typical for each employee, when utilizing a low-flow flush system (Crites <br /> and Tchobanoglous, 1998). <br /> The following table presents the proposed septic wastewater use for the site. The rates presented <br /> from the references provide general guidance but do not always reflect a match in usage. Careful <br /> examination, professional judgment, and experience are necessary to select a reasonable flow <br /> rate estimate. The flow rates selected for the uses associated with this project are presented <br /> below. <br /> Responsive ■ Resourceful ® Reliable 12 <br />