Laserfiche WebLink
Soil Suitability/Nitrate Loading Study-Addendum Irerracon <br /> Manteca Farm Improvement Stockton, CA <br /> July 24,2020 Terracon Project No.NA197073 <br /> separately. Refer to the following table for average daily flow rates and a summary of the nitrate <br /> loading calculation for the site based on the revised net rainfall recharge. <br /> Summary of Nitrate Mass Balance Equation -Revised. <br /> Result Average Effluent Leachfield Deep <br /> Septic System No. (Nc)* Acres(A) Daily Flow Concentration Denitrification Percolation <br /> (mg/L- (NW) of Rainfall <br /> N) (Q)(gpd) (mg/L-N) (d) (R)(in) <br /> 1. Existing -- 14.0 577 85 10% 9.39 <br /> Classroom Building <br /> 3. Proposed 15,000 --- 14.0 352 85 10% 9.39 <br /> SF Agricultural <br /> Building <br /> Nitrate as N Total 7.5 14.0 929 85 10% 9.39 <br /> Septic Systems <br /> No. 1 &3 <br /> Maximum contaminant level(MCL)for nitrate in drinking water is 10 mg/L-N. <br /> Based on the revised nitrate loading balance, nitrate levels for the existing and proposed land use <br /> is 7.5 mg/L-N, below the MCL of 10.0 mg/L-N. <br /> We appreciate the opportunity to work with you on this project. Please contact us if you have any <br /> questions. <br /> POFESSION�I <br /> Sincerely, o ON MEJOR Fti <br /> TERRACON CONSULTANTS, INC. CLU <br /> '; /pa <br /> U N0.72446rn <br /> Tamara K. Woods Aaron J. Mejorado, P.E. q Clvi Q�`P <br /> Staff Scientist Professional Engineer 72446 �OFCA��FO <br /> e-'c� <br /> Attachments: Terracon Nitrate Mass Balance Calculation- Revised <br /> Water Balance Recharge Analysis <br /> Responsive■Resourceful ■ Reliable 2 <br />