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Sewage & Grease Trap Systems

Onsite Sewage Systems

The process for installing a new on-site sewage system, modifying an existing on-site sewage system, or repairing a failing on-site sewage system starts with choosing a certified installer.

A certified installer will perform a percolation test and evaluate the site to see if it is suitable for an on-site sewage system or modification, or evaluate a failing system to see what repairs can be made.  The certified installer will then make recommendations to the home owner/property owner for what type of system or repair should be installed.  The homeowner/property owner and/or certified installer will fill out an on-site sewage system application and submit it to the Health Department.

Once an application is received a Sanitarian will contact the certified installer to schedule a visit to the site of the proposed new system, modification, or repair.  The Sanitarian will evaluate the site to determine if the new system, modification, or repair that the certified installer has proposed is possible and/or discuss any changes or corrections that could be done to make the new system, modification, or repair possible.

Once the Sanitarian has approved the site a Construction Permit for the new system, modification, or repair will be issued by the Health Department.  The certified installer may begin construction/repair of the system at that time.  If the certified installer encounters any issues during construction/repair that would require them to modify the plan that was approved by the Health Department, they must contact the Health Department before continuing with construction/repair.

When construction/repair of the system is finished, but before the system is covered up, the certified installer must contact the Health Department for a final inspection.  The sanitarian will evaluate the completed system to make sure that it was installed correctly and in accordance with the approved construction plan.

Existing System (Home Loan) Evaluations

Many banks and other lending institutions now require that a home with an on-site sewage system and/or water well be evaluated to ensure that the sewage system is working correctly and/or that the water supply is safe before they will approve a mortgage or other financing for a home sale.  The process starts with the lender or current home owner filling out an application for a home loan evaluation.

Note: The home must have been occupied for the last 30 consecutive days and the septic tank must not have been pumped out within the last 30 days in order for a Sanitarian to do a Home Loan Evaluation.

When an application is received a Sanitarian will contact the applicant to schedule the home loan evaluation.  The sanitarian will take a water sample which will be tested to make sure that there are no coliform bacteria in the water supply.  The sanitarian will also place dye tablets in the drains for sinks, toilets, tub/showers, and washing machines.  This is done so that if any sewage is coming to the surface of the ground (which indicates a sewage system failure) it will be easy to see.  The Sanitarian will make a follow-up visit 2 days after placing the dye tablets to see if there is any dye on the ground surface.  After the Sanitarian has confirmed that the sewage system is working correctly, the septic tank will need to be pumped out if this has not been done within the last 3 years.

Grease Traps

Grease traps/ interceptors are required to receive the drainage from fixtures and equipment from grease-laden waste located in food preparation areas, such as in restaurants, hotel kitchens, hospitals, school kitchens, bars, factory cafeterias, clubs, and other institutions. Grease traps/interceptors should receive waste only from fixtures that allow fats, oils, or grease to be discharged. Dishwashers should only be included when necessary in order to capture grease that cannot be otherwise contained.

More Information

Online Resources