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Nitrogen Loading Study Report <br /> 24754 EAST RIVER ROAD <br /> Escalon, California <br /> WKA No. 11306.01 <br /> 1.0 INTRODUCTION <br /> Wallace-Kuhl &Associates (WKA) prepared this Nitrogen Loading StudyReportto describe <br /> contributions of Nitrogen from two septic systems to be installed at the Morrill Industries facility <br /> (Site) located at 24754 East River Road in Escalon, California. The septic systems are to be <br /> located near the East Blasting Building (East Septic System) and the South Warehouse Building <br /> (South Septic System). <br /> 2.0 SITE BACKGROUND <br /> Preliminary designs of the septic systems were provided by Wilson Architecture, Inc. and are <br /> summarized in Table A below: <br /> Table A—Septic System Design Summary <br /> Number of Tank Size Leach Field Filter Bed Area <br /> Employees (gallons) (square feet) <br /> East Septic System 4 1,200 900 <br /> South Septic System 3 1,200 800 <br /> 3.0 PHYSICAL AND CHEMICAL PROPERTIES OF SOIL <br /> Soil underlying the Site is primarily a brown silty sand. Percolation testing conducted by North <br /> American Technical Services show a percolation rate of 22.7 minutes per inch and 1.7 minutes _ <br /> per inch for the east and south locations, respectively. There is currently no data which would <br /> suggest a significant chemical impact to soil. <br /> For the purpose of this study, it is assumed that there is no uptake of nitrogen by on-site <br /> vegetation as the leach fields fall below the root zone. It is also assumed that there are no <br /> nitrogen losses during infiltration and a complete conversion of total nitrogen to nitrate was used <br /> for this study. <br />