Laserfiche WebLink
September 20,2001 <br /> Job Number: LGOI-098 <br /> Page 10 <br /> Table 7. Total Estimated Effluent. <br /> (see Plates 8 and 9 for calculations) <br /> Period Visitors per period Use per person Quantity(gallons) <br /> Monday-Friday 400 people for 3 hrs each 5 gallons per person 400 x 5 x 5= 10,000 <br /> day. per day times 5 days. <br /> Saturday 200 people for 3.5 hrs. 5 gallons per person. 200 x 5 = 1,000 <br /> Sunday 400 people per service,4 5 gallons per person 400 x 5 x 4=8,000 <br /> services per day. times 4 services. <br /> Weekly Average: 19,000 gallons <br /> Daily Average: 2,714.3 gallons <br /> The following table is a summary of the Nitrate Loading Analysis(see Plates 8 and 9)which considers nitrate <br /> sources from septic systems and rainfall. <br /> Table 8. Summary of Nitrate Mass Balance Analysis. <br /> Result(mg/L-N) Acres Quantity Effluent Denitrification Rainfall <br /> 10 mg/L-N is MCL for (gal/day) Concentration (%) Infiltration <br /> drinking water. (mg/L-N)* (in) <br /> 25.9 3.5 2,714.3 Standard septic Native Soil 5.1 <br /> (above MCL) system effluent 15 <br /> level <br /> 45 <br /> 7.5 3.5 2,714.3 Engineered septic Engineered 5.1 <br /> (below MCL) system effluent septic system <br /> level 35 <br /> 17 <br /> * Note: Maximum contaminate level(MCL) for Nitrate is 10 mg/L-N and 45 mg/L as NO, <br /> Table 7 presents the results of two (2) scenarios, utilizing a standard septic system and <br /> utilizing an engineered septic system designed to reduce nitrates. As a result of the analysis, a <br /> (standard septic system which primarily relies on subsurface disposal through leaching would <br /> probably cause a build up of nitrates above the maximum contaminate level for nitrates (10 <br /> mg/L-N) given the assumptions. A build up of nitrates is estimated to occur because of the <br /> relatively high waste water flows to the septic system and the relatively small amount of yearly <br /> rainfall mixing with the effluent. <br /> ?pERiO <br /> O � <br /> � r <br /> sso�� <br />