Smith - Glendon Bio-filter Design
Jurisdiction: Public Health of Seattle and King County
Client: Steven Smith Construction
This single family residential project design utilized the Glendon Bio-filter Technology (GBT) mounded system.  This system used a conventional septic tank for pre-treatment of domestic waste flow.  It then bleeds effluent into a pump tank as water is flushed from the house.  The pump was then used to deliver small frequent doses to an up-flow GBT filter system.  The effluent slowly passes through the filter and wicks to the surrounding grounds for subsurface absorption.  This particular design was used due to the difficult site conditions and small lot.  The GBT Septic System provides a high level of treatment, and has been given the highest level of acceptance for any septic system by the Washington State Department of Health.  Using this system allowed the client to locate the proposed residence in his ideal location, which ended up being down gradient of the drain field area.

Riverhill Community Septic System
Jurisdiction: Washington State Department of Health / Mason County Public Health
Client: Riverhill Park LLC
Description: This project involved providing onsite sewer service for 129 lots. Since municipal sewer is not located within reach of the site, American Engineering Corporation decided to explore the use of onsite septic to ensure the project could move forward. An area was found that was large enough to serve all 129 lots within the project boundary. This had many advantages, but also some challenges to overcome. The Washington State Department of Health has strict guidelines for discharging large quantities of septic effluent to the ground. The waste water must be pre-treated to meet specific minimum standards for nutrient reduction. Cutting edge technology and engineering design by American Engineering Corporation was utilized to ensure the protection of nearby drinking well systems. A subsurface drip absorption system was chosen due to its small foot print, and ease of installation in shallow soils. This system is comprised of a treatment system by Orenco which utilizes a multi-pass attached growth packed media filter, which provides decanting, and treatment of effluent using U.V. disinfection. Only then can it be discharged to a low pressure irrigation drip fields due to having nitrogen levels that are significantly reduced.

Garske Low Pressure Septic Design
Jurisdiction: Public Health of Seattle and King County
Client: Greg Garske
Description: This project involved designing an onsite waste water system for a single family residence that could be approved by the Health Department, but also has a low construction and installation cost. The system chosen for this project was a Low Pressure Gravity design which uses a dosing siphon, to intermittently charge the pressure drain field four times per day. Charge pressure was created from difference in elevation between the siphon tank and the elevation of the drain field. A distribution and absorption trench was constructed using conventional drain field trench techniques. This was the most cost effective system, because it does not require a power source or pump system to manage and maintain. Because of American Engineering's knowledge of septic design and cost effective products, the client's ideal price point for this system was reached.

Belltown Square Town Center Waste Water System
Jurisdiction: Washington State Department of Health / Mason County Public Health
Client: Jack Johnson Construction
Description: The Belltown Square Town Center project is a commercial development comprised of several stores, a laundry mat, a restaurant and an animal clinic. The design requirements for this onsite system were especially sensitive due to the high strength waste water mix that was going to be produced from these businesses. It was also a requirement of this system to be able to treat this waste water over a long period of time with little to no maintenance. American Engineering Corporation's design incorporated an even flow gravity distribution tank, to twenty 500 gallon per day Glendon Bio-filter Technology (GBT) models and an Aqua-Tech Nibbler System. All of these components allowed the high strength waste generated at the Town Square to be reduced to a waste strength equal to that of an ordinary household waste before being filtrated into the ground. Furthermore, this system has now been online for 8 years and has yet to receive new components for stage of the treat train.