Sewage Disposal Systems
CCA has provided designs for all conventional sewage disposal systems. Generally three methods are available:
1. Sanitary Sewer Extension.
2. On-site discharge to soil - Septic System.
3. On-site Sewage Treatment Plant (STP) with discharge to soil or watercourse.
For small scale projects, CCA provides low cost septic system designs for single family residential. For large scale projects requiring on-site Connecticut Department of Energy and Environmental Protection (DEEP) systems, we analyze and perform the following:
Soil Testing – On-site evaluation of the soils available for sewage disposal including permeability tests on appropriate samples. If necessary, we engage a boring rig to examine deep soil layers.
Hydraulic Analysis – This study determines the hydraulic capacity of the soils to determine if sufficient capacity is available to accommodate the proposed discharge, rainfall and safety factor.
Virus and Bacteria Detention Analysis –The determination of the velocity of sewage flow through the soils to determine if sufficient renovation has occurred prior to reaching a water body, property line or well.
Nitrogen Dilution Analysis – Determination of groundwater and surface flows available to dilute the nitrogen components from the sewage effluent to acceptable levels.
Long Term Acceptance Rate – An analysis of the long term effect of bacterial action with regard to the soil interface, development of the biocrust and calculation of the required leaching interface area.
- Phosphate Absorption – Calculation of the quantity of soils required to reduce the phosphate component of the effluent discharge to acceptable standards.
CCA can provide construction review services during the installation of the sewage disposal system.