Lagoon systems have their share of requirements.
Lagoon septic systems create onsite wastewater treatment systems for homes where the soil does not support a traditional septic system. Lagoon systems handle household sewage on sites where soils do not drain well or a shallow water table is nearby. Municipalities and other governing bodies determine the requirements for lagoon septic systems. Does this Spark an idea?
Lot Size
Most jurisdictions that regulate onsite wastewater treatment systems specify a minimum lot size for a septic lagoon. That size is typically 3 acres or more. Not only does the lagoon require more above-ground space than other types of wastewater treatment systems, but it also needs space for replacement when it no longer functions adequately.
Groundwater Clearance
The bottom of the lagoon has to be a certain distance above the highest ground water level that is expected on the site. Again, various jurisdictions have their requirements, but 2 feet is common. The bottom of the lagoon has to be lined with a material that will limit the amount of sewage that percolates into the soil over a specified time. Generally 1/8 inch of seepage per day is the most allowed.
Dike
The lagoon has to be surrounded by an earthen berm, or dike, that is at least 4 feet wide at the top. The dike has to rise at least 1 foot above the highest expected sewage level and must be surrounded by a fence that is at least 4 feet high.
Delivery Pipe
The pipe that carries the sewage to the lagoon has to enter from the bottom of the lagoon near its center. Alternatively, it can enter from the side as long as it is extended to the center for discharge. A 2-foot by 2-foot concrete block is required below the place where the pipe discharges the sewage.
Septic Tank
The effluent must flow from the house and into a septic tank for settling before it travels to the lagoon. Regulating jurisdictions specify the size of the tank based on the number of bedrooms in the home. Tanks have to have pipes arranged inside so solids settle out to the bottom, grease and other lighter-than-water materials float to the top, and only the liquid from the center travels to the lagoon.
Maintenance
Maintain a lagoon by checking and repairing its structure, removing excessive vegetation, monitoring its color and monitoring its water level monthly. Check the sludge level in the septic tank and repair any leaks or seeps in the dike as needed or every one to four years. Remove sludge from the lagoon when it is closer than 18 inches to the wastewater surface level.
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