Comprehensive septic design, commercial projects, and stormwater solutions
Comprehensive septic design services for homes and residential properties
A typical residential septic system being installed in Clark County, WA
Residential projects range from a new rural subdivision requiring "perc" approvals, construction of a residence (new home or an addition to an existing home) and replacement of an older/existing septic system which has failed.
With residential projects, we're oftentimes working directly with the person who lives (or will live) in the residence. We realize you have very specific plans for your property and we want to work with you on accomplishing your goals. The first step is to meet you on site and walk the property. We'll want to know where any/all existing features are located and talk about your future plans. If you want to learn more about the process, please see our permitting process page.
We gather project details via phone or email. For new construction, please provide a copy of your building plans.
We review county maps and historical records that may affect permitting. Site visits typically scheduled within one week.
We prefer you on-site to walk the property together. We bring a mini-excavator to dig test holes for soil testing and stake proposed locations if needed.
We prepare design calculations and drawings (typically within one week for residential projects) and submit to the county permit portal.
Septic design for schools, parks, restaurants, and other commercial facilities
Mike Williams completing a site assessment at Cougar Park on Yale Reservoir.
Because we have an engineer on staff, EGSD does more commercial septic designs than most other septic designers in the area. This is for two reasons:
Washington State Department of Transportation
Washington State Parks
Battle Ground School District
Clark County Parks Department
Clark County Public Works
Port of Camas/Washougal
PacifiCorp
Infiltration testing and soil reports for stormwater permitting
An infiltration test being conducted during a snowy winter day.
With the implementation of new regulations from the State of Washington, most local counties (including Clark County) are now being forced to require an extensive review/permit process for any new or replacement "impervious" surface (driveway, roof, etc). Part of the process oftentimes requires a detailed soil description and infiltration test. If the timing is coordinated, EGSD can perform these tests at the same time as the testing for septic purposes. Although the tests are very different from each other, there are efficiencies in getting them completed at the same time.
For stormwater, the infiltration test involves placing a specific diameter pipe, a certain depth into the native soil at a prescribed depth from the surface. The pipe is filled with water (and re-filled as necessary) until the soil is saturated. After saturation, timed testing begins and the rate at which the water enters the soil is recorded. After multiple tests, the data is put into an equation and the "coefficient of permeability" is determined. The number is used in sizing stormwater infiltration systems.
Contact us today to discuss your project needs. We're here to help make your septic design process as smooth as possible.
