Laserfiche WebLink
1 <br /> July 2, 2007 <br /> NXOA Project Number: E06122A <br /> Page 3 <br /> Available Adsorotion Area: <br /> 7 sf per linear foot of leach line (2.5 +2 + 2.5 = 7) <br /> Required Adsorption area (sf) — 1,18 5 gpd/0.55 gpof <br /> Required Adsorption area (sf) = 2,156 sf <br /> Required Length ofLeaching Trench.- <br /> Length <br /> rench:Length (ft) =2,156 sfl 7 sf per lineal font <br /> Length (ft) = 308 feet leaching trench required <br /> 380 feet leach line is proposed <br /> 1.2 factor of safety for adsoiption area in the disposal trenches <br /> Flow above 1,186 gpd is considered serge flow <br /> Surge Flow is 2,156 gpd- 1,186 gpd = 970 gpd(potentiol daily surge flow rate) <br /> Surge flow will be contained in an 800 gallon pumping chamber and seepage pits if required <br /> Available Surge Flow into Pits: <br /> 10 seepage pits, 42-inch diameter, 25 feet deep each,filled with 3/4 to 2 inch gravel. <br /> (dia)^2 *pi *depth = volume (c)g <br /> Gallons (gals) = volume (cf) * 7.48 gallonslef <br /> Porosity = 15 percent (porosity is the open space between the gravel rock in the pits) <br /> Total Pit Volume (gals) = 2.5^2 * 3.14 *25 * 7.48 * 10 * 0.15 <br /> Total Pit Volume (gals) = 5507 (total pit storage) <br /> Surge Tank Volume = 800 gats <br /> Total Available Surge Volume — 800 gals + 5507 gals <br /> Total AuailahleSurge Volume = 6,307gals <br /> Calculation for Determining Liable Cellulase Volume <br /> The ratio between nitrate and required carbon was determine using the chemical relationship for <br /> denitrification: <br /> 4NO3- +5CH2O + 4H-—> 2N2 (g)+ 5CO2 (g) +7H2O <br /> Using stoichiometry, a weight ratio of 1.652 of Nitrate (NO3) to Cellulose (CH2O) is calculated. <br /> It was determined that approximately 1300 pounds of nitrate would be generated at the facility in <br /> a 30 year period requiring approximately 787 pounds of cellulose (sawdust/woodehips). Using a <br /> S � c�OS �zu � <br />