Laserfiche WebLink
Soil Suitability&Nitrate Loading Study Page I <br /> Proposed M2 Winery,2900 Peltier Rd,Acampo CA <br /> Project No. 670.1 A <br /> May 28,2013 <br /> 7.2 Nitrate Loading Calculation <br /> The following discussion summarizes the total nitrate loading from the proposed new system. <br /> An estimate is made of total nitrate load as calculated from a simple mass-balance approach. <br /> The Hantzsche and Finnemore model is then used to estimate the nitrate concentration in <br /> groundwater. The calculation worksheets are in Appendix E. <br /> The following table summarizes the flow-rate calculation for the anticipated septic system. <br /> Use Annual Ave, Effluent Vol.Weigbted <br /> Effluent Daily Flow Conc. Ave. <br /> Full Time Employees 15,600 gals 43 GPD 60 m 7.5 m <br /> Part Time Employees 1 V20 gals 51 GPD 60 Tf& 8.9 MWL <br /> Tasting Room 62,400 gals 171 GPD 80 m 39.8 m <br /> Mmteft M 28 800 gals 79 GPD 80 m I8. <br /> OTALS 125,520 gab 344 GPD I74.6 m <br /> The total load will be 344 GPD at 74.6 mg/L nitrate concentration. The Hantzsche and <br /> Finnemore model is then used to estimate the nitrate concentration in groundwater. The <br /> calculation worksheet(s)are in Appendix E. <br /> System Acres Daily Flow Efilnent Denitrifkation Percolatlon N T wding <br /> Cone. Factor d <br /> 17 344 GPD 74.6 m 25% 7.85 in. 58 IN <br /> The proposed septic system will produce a load of 58 pounds per y n loading. <br /> This represents an average concentration at the groundwater surf ;��ma <br /> of nitrogen, <br /> or 28 percent of the established maximum contaminant limit of 10 me future system <br /> is estimated to result in nitrate loading to groundwater that will not exceed the MCL limit. <br /> This calculation does not consider the dilution that occurs as newly introduced water mixes <br /> with the deeper groundwater. The calculated groundwater concentrations offer a "worst <br /> case" estimate. The existing nitrate level from the laboratory analysis of well water is 0.42 <br /> mg/L which translates to less than 0.1 mg/L of nitrogen. The total nitrogen as nitrogen load <br /> would therefore be much less than the MCL concentration of 10 mg/L. <br /> 2937 Veneman Ave.,#8240 Geo-]'base Environmental Inc. Phone: (209)569-0293 <br /> Modesto,CA 95336 Fax: (209)569-0295 <br />