Laserfiche WebLink
June 21,2000 <br /> Job Number. LG00-173 <br /> Page 9 <br /> Nitrate from Human Sources <br /> To estimate the average concentration of the waste stream to the septic tank, the nitrate <br /> level of nearby well water was added to the average septic waste level normally considered to be <br /> 45 mg/1-N. The nitrate level of ground water at the near by agricultural well was found to be 2.1 <br /> mg/1-NO3 or 0.47 mg/L-N. Therefore the total nitrate concentration of the waste stream is <br /> estimated to be 45.5 mg/1-N(45 mg/1-N+ 0.47 mg/1-N) for the site prior to denitrification in the <br /> septic system leach field. <br /> To estimate the average daily quantity, fifteen gallons (15 gal) per day per employee and <br /> ten gallons (10 gal) per day per customer was the estimated use for the proposed boutique <br /> winery. The facility is anticipating about 45 people per week and will be open Friday thru Sunday <br /> only. No more then three(3) employees will be working at the facility. Typically one or two (2) <br /> employees will be at the winery at any given time. The following table tabulates the anticipated <br /> daily usage of the septic system. <br /> Table 3. <br /> Total Estimated Daily Usage of Septic System <br /> Category Effluent usagefor People per day Effluent quantity per category <br /> each category <br /> Employees(M-Th) 15 gals 1.5 1.5 people*4 days* 15ga1/person-day <br /> — =90 gal(weekly) <br /> Employees(F-Su) 15 gals 1 1.0 people*3 days * 15gal/person-day <br /> =45 gal(weekly) <br /> Customers(F-Su) 10 gals 15 15 people*3 days* l0gallperson-day <br /> =450 gal(weekly) <br /> Total Average Daily (90 gal+45 gal+450 gal)/7 days/week <br /> Flow: =72gals/day(ave a jailflow) <br /> Nitrate in Rain Water <br /> The average rainfall and potential evaprotranspiration values for the Lodi area are <br /> published by the Soil Conservation Service and by CIMS, California Department of Water <br /> Resources. The average rain fall for the Lodi CIMS station between 1948 and 1987 is 17.16 <br /> inches/year. The average potential evapotranspiration for Lodi is 43.62 inches. <br /> p.I�4 <br />