Laserfiche WebLink
Addendum-Soil Suitability&Nitrate Loading Study Page 2 <br /> Oak Fans Winery,Lodi CA <br /> Project No. 670.1C <br /> November 6,2013 <br /> System Personnel Number Flow Rate Schedule nual Out ut <br /> Existing Res. Residents 3 50 GPD 365 DaysfYr 54,750 gals <br /> roduction/Tastin Full Time Employees 4 15 GPD per Person 260 Days/Yr 15,600 gals <br /> /Pro sed Part Time Employees* 5 8 GPD per Person 260 DaysfYr 10,400 gals <br /> Tasting Room 100 4 GPD per Person 260 Days/Yr 104,000 gals <br /> Visitors•' <br /> Events Full Time Em to s 4 15 GPD per Person 260 Da r r 15,600 s <br /> istin Part Time Em 1 s' 4 8 GPD r person 260 Da 10,400 gals <br /> Guests*** 150 8 GPD per Person 16 Days/Yr 1 19,200 gals <br /> Annual Flow 229,950 <br /> • Assumes pari timers work approx.half time. <br /> •• Assumes 300 visitors per 6-day week. <br /> Assumes 4 restroom visits each day per person at 2 gals.per use. <br /> # Actual number of residents. <br /> 7.2 Nitrate Loading Calculation <br /> The following discussion summarizes the total nitrate loading from the proposed new system <br /> as well as the existing systems. An estimate is made of total nitrate load as calculated from a <br /> simple mass-balance approach. The Hantzsche and Finnemore model is then used to estimate <br /> the nitrate concentration in groundwater. The calculation worksheet(s)are attached. <br /> The following table summarizes the revised flow-rate calculation with nitrate effluent loads for <br /> the anticipated and existing septic systems. <br /> System Personnel Ave.Daily Effluent Vol.Weighted <br /> Flow Cone. N„ Ave. <br /> Existing Res. Residents 150 GPD 44 m L 10.4 mgfL <br /> roductioaffastin Full Time Employees 43 GPD 80 mgfL 5.4 m <br /> (Proposed) Part Time Employees 29 GPD 80 m 3.7 m <br /> Tastine Room Visitors 285 GPD 80 mpjL 36.1 m <br /> Events Full Time Employees 43 GPD 80 m 5.4 m <br /> Pxistin Pan Time Em loyces 29 GPD 80 m 3.7 m <br /> Guests 53 GPD 80 m L 6.7 man <br /> TOTALS 1 632 GPD 71.4 m <br /> The total load will be 632 GPD at 71.4 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 attached. <br /> System Acres Daily Flow Effluent Denitrification Percolation N Loading <br /> Conc. N. Factor d R <br /> 3 S em Total 1 31 1 632 GPD j 71.4 m 25% 1 7.85 in. 1 103 Ihs <br /> The existing and proposed septic systems will produce a total groundwater load of 103 <br /> pounds per year of nitrogen. This represents an average concentration at the groundwater <br /> 2937 Veneman Ave.,#6240 Geo-Phase Environmental Inc. Phone: (209)569-0293 <br /> Mndeetn_CA 9515!. P.— f�MN acoslos <br />