SR0081147_SSNL - Laserfiche WebLink

Home Browse Search

IV. SEPTIC SYSTEM DESIGN: OPERATIONAL PARAMETERS AND COMPONENTS A. PROPOSED SEPTIC SYSTEM DESIGN SSS§ 3.7. The design of the leachline/leachfield disposal system is based upon the factors for efficient operation, disposal field longevity, and environmental protection. An overview of the system operation to serve the proposed facility is as follows and illustrated on the accompanying plans: Influent from the Restrooms will flow into a P&L Concrete, Inc. standard precast, 1,200 gallon septic tank. A Polylok, Inc. PL -68 effluent filter is to be installed at the outlet of this tank. Clarified effluent will then gravity flow to a leachfield constructed at -grade due to the shallow water table. B. SEPTIC TANK AND BLOOD HOLDING TANK Septic tanks store accumulated sludge, scum and effluent (clear zone) volumes, which in turn affect treatment of nitrogen within the tanks. Detention time calculations demonstrate that when the maximum ADF is applied to the existing tank, there remains sufficient detention time: Detention Time Calculation: Detention Time =1200 gal tank capacity x 0.70 (30% volume lost to sludge/scum accumulation) 1.5 (Peaking factor) x 150 gals/day (ADF) Detention Time = 3.7 days. The minimum acceptable detention time is 1.0 day. The 2,000 gallon blood holding tank will accumulate blood from the slaughtering process. When the tank is 80% full by direct observation of the tank contents, Sisk Recycling Company will be called to pump -out the tank and deliver contents to their plant for recycling. C. LEACHLINE/LEACHFIELD SIZING CALCULATIONS Base Tank Capacity (BTC) = 1,200 gal. Leachline Equivalent Requirement = 1,200 gallons BTC + 150 gpd max ADF x 0.250 clay loam Soil Factor (SF) = 338 lineal feet of leachline (LFLL). Install three, 100 ft leachlines. D. 100% REPLACEMENT/RESERVE AREA The ample replacement area is located directly to the west of the primary disposal field, as noted on the plans. Page -7- Chesney Consulting