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Why Maintain My Septic System?

- Friday, June 17, 2022
Morse Engineering and Construction - Cleaning The Draining Pipe and Septic System

When septic systems are properly designed, constructed, and maintained, they effectively reduce or eliminate most human health or environmental threats posed by pollutants in household wastewater. However, they require regular maintenance or they can fail. Septic systems need to be monitored to ensure that they work properly throughout their service lives.

Saving money

A key reason to maintain your septic system is to save money! Failing septic systems are expensive to repair or replace, and poor maintenance is often the culprit. Having your septic system inspected regularly is a bargain when you consider the cost of replacing the entire system. Your system will need pumping depending on how many people live in the house and the size of the system. An unusable septic system or one in disrepair will lower your property value and could pose a legal liability.

Protecting health and the environment

Other good reasons for safe treatment of sewage include preventing the spread of infection and disease and protecting water resources. Typical pollutants in household wastewater are nitrogen, phosphorus, and disease-causing bacteria and viruses. If a septic system is working properly, it will effectively remove most of these pollutants.

With one-fourth of U.S. homes using septic systems, more than 4 billion gallons of wastewater per day is dispersed below the ground’s surface. Inadequately treated sewage from septic systems can be a cause of groundwater contamination. It poses a significant threat to drinking water and human health because it can contaminate drinking water wells and cause diseases and infections in people and animals. Improperly treated sewage that contaminates nearby surface waters also increases the chance of swimmers contracting a variety of infectious diseases. These range from eye and ear infections to acute gastrointestinal illness and diseases like hepatitis.


How is a Septic Inspection Done?

- Monday, June 13, 2022
Morse Engineering and Construction - Septic System Inspection

There are two types of septic inspections.

Visual Inspections

When buying or selling a house, the home inspector will usually complete a visual inspection.

A visual inspection involves asking a few questions, such as how old the house is, how often the owner pumps the septic system, and when the last inspection was. The inspector will then flush all the toilets and run all the water in the house to make sure the water pressure is up to par and everything is draining properly. Finally, the inspector will go out to the drain field to make sure there is no standing water, which can indicate a cesspool.

A visual inspection is helpful and quick, but a full inspection can really tell you the real story behind the health of the septic system.

Full Inspections

A full inspection includes everything a visual inspection includes, but it also goes the extra mile. This inspection is the one you'll want to get done every three to five years.

In a full inspection, inspectors will remove the cover to the septic tank and check the water level. The water level can or show whether the water is draining properly. The inspector will then run water in the house to make sure it is properly flowing from the house to the septic tank, and to make sure the water level within the tank does not rise when they introduce more water.

The inspector may use a dye test during this part of their inspection. In a dye test, the inspector will introduce dye into the water that is being drained to see how much of it enters the septic tank.

From there, the septic tank will get pumped and the inspector will check for any backflow from the absorption area. The backflow level tells the inspector if there is a problem with your drain field. The flow level is then checked again to make sure every aspect of the septic system is in working order and there are no blockages.

For more information, contact Morse Engineering and Construction.


Designing a Septic System: The Processes Considered

- Friday, June 03, 2022
Morse Engineering and Construction

Sewage inflow

Maximum sewage flows into a septic tank is based upon a number of plumbing fixtures and discharging simultaneously.

The estimated number of fixtures serving 50 people for residential colonies up to 300 for boarding schools is estimated from peak discharge tables.


For a standard temperature of 25⁰C, 10 liters per minute flow rate and 0.92 m2 surface area are required.

For 0.05 mm size particle removal, more than 75% sewage of specific gravity 1.2 mm and a minimum depth of 25-30 cm is required.

Sludge digestion

The suspended solids entering the may be taken as 70 gm per day per capita.

Assume 60% of solid removed along with fresh sludge with 5% solid content.

The volume of fresh sludge may be taken as 0.0083 m3 / capita/day.

The digestion period for average sludge is 63 days.

Considering the volume required for sludge and scum accumulated, the septic tank is designed for the detention period of 24 to 48 hours.

For more information on designing a septic system, contact Morse Engineering and Construction.