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Septic Tank Installation Oregon City & Surrounding Areas

Beginning with a septic tank systems installation, Goodman Sanitation in Portland, OR is the reliable source for all of your wastewater treatment needs. We are here to take care of your septic systems from start to finish. We will be glad to consult with you about your septic systems needs. Our estimates are always free.

There are many factors involved in the installation of a septic tank systems. We are a professional company with the knowledge and experience to expertly determine the proper location and optimum size for your new septic systems. We will speak with you about water usage, how many people will be using the systems, the use of washing machines and garbage disposals, and water conservation techniques to ensure your septic tank functions properly.

We look at the location of the plumbing in your home or business and view the slope of the land and your lot configuration. The septic tank will be placed in an area with more than adequate drainage that can be accessible for pumping when routine maintenance is needed. Hoses on pumper trucks typically reach up to 50 feet.

It is most desirable to have a gravity flow all throughout your wastewater treatment systems. This avoids the need for mechanical assists like valves and pumps. But, in situations where the dwelling is not high enough for gravity flow to the tank, grinder pumps or sewage ejector pumps can be installed to lift the wastewater to an elevation suitable to drain into the septic tank.

Before excavation, all buried gas, electric, and other utility lines will be located. For new construction, we also take into consideration any possible future expansion and locations of sidewalks, driveways, garages, patios, and storage buildings. We will also consult with you about the proper landscaping for a septic systems site to make sure plants, trees, and roots do not interfere with the drainfield.

With the proper maintenance scheduling, your septic tank systems will provide you with years of service and Goodman Sanitation will make sure everything flows smoothly.

Houshold size (Number of People)
Tank Size
1 2 3 4 5 6 7 8 9 10
500 5.8 2.6 1.5 1.0 0.7 0.4 0.3 0.2 0.1 -0.7
500 9.1 4.2 2.6 1.8 1.3 1.0 0.7 0.6 0.4 0.3
1000 12.4 5.9 3.7 2.6 2.0 1.5 1.2 1.0 0.8 0.7
1250 15.6 7.5 4.8 3.4 2.6 2.0 1.7 1.4 1.2 1.0
1500 18.9 9.1 5.9 4.2 3.3 2.6 2.1 1.8 1.5 1.3
1750 22.1 10.7 6.9 5.0 3.9 3.1 2.6 2.2 1.9 1.6
2000 25.4 12.4 8.0 5.9 4.5 3.7 3.1 2.6 2.2 2.0
2250 28.6 14.0 9.1 6.7 5.2 4.2 3.5 3.0 2.6 2.3
2500 31.9 15.6 10.2 7.5 5.9 4.8 4.0 4.0 3.0 2.6

Note: More frequent pumping needed if garbage disposal is used


Provided through a grant from the Farmer Home Administration. The material is the result of tax supported research and as such is not copyrightable. It may be freely reprinted with the customary crediting of sources.

Extension Services, Oregon State University, Corvallis, O.E. Smith, director.
This publication was produced and distributed in furtherance of the Acts of Congress of May 8 and June 30, 1914. Extension work is a cooperative program of Oregon State University, the U.S. Department of Agriculture, and Oregon counties.
Oregon State University Extension Service offers educational programs, activities, and materials – without regard to race, color, national origin, sex, age, or disability – as required by Title VI of the Civil Rights Act of 1964, Tax IX of the Education Amendments of 1972, and Section 504 of the Rehabilitation Act of 1973. Oregon State University Extension Service is an Equal Opportunity Employer.


There are inspections for homeowners who want to remodel their homes with additions to the house or property.

There are inspections for hardship cases for homeowners who want to add a mobile home to the property and attach to the existing septic systems.

There is the "time of transfer" inspection / evaluation when the homeowner is selling the property.

Each of these inspections require that the tank be uncovered, the distribution box(es) be uncovered, that there is an amount of water introduced to the tank, to watch the contents flow to the distribution box and be accepted by a "thirsty" drainfield, to pump the tank and note any deficiencies.

To do an inspection on any and all pump vault components and panels along with electrical connections. To provide a detailed plot plan meeting all DEQ Specified requirements with all DEQ forms filled in completely with our technicians "certified" number and identification on the reports.

Should any repairs be needed to help bring your systems "up to date" with compliance codes. We will outline the repairs and the cost and schedule an appointment for you. This gives you time to make an informed decision, ask questions, research websites, or ask for comparison bid for repair or work on fitting the repairs into your budget.

Your septic systems is the second biggest investment, next to your home and Goodman Sanitation will be considerate on how you spend your money.

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