| Client : | Hoyt Street Properties/KLB Construction Kleinfelder Associates |
| Contact : | David Lamadrid |
| Location : | Portland Oregon (USA) |
| Project : | Thermal desorption of 21,000 tons of MGP tar contaminated soil by means of thermal desorption |
| Duration : | September 1995 to August 2001 |
Site History:
The clean-up site is known as "The Pearl District" of Portland and is located downtown. It was a former manufacture gas plant (MGP) site operating from the 1930's to mid 1950's. The clean-up site was part of a major redevelopment project for the downtown area. Excavation took place on location, and contaminated soil to be thermally treated was transported to TPS Technologies' facility approximately 8 miles away.
Soil to treat and clean-up objectives :
The soil to treat was highly contaminated with PAH's, had a high clay content, and a high moisture content. Other petroleum related contaminants were also found in the soil. The clean-up levels were less than 5 ppm for the total PAH's and less than 100 ppm for the heavy petroleum.
TPS Technologies Involvement :
TPS Technologies was involved in the project for the thermal desorption treatment operation, as well as the set-up of all environmental, health and safety procedures for the operation of the thermal unit.
Equipment :
The project was performed by means of a parallel flow thermal desorption unit, with a nominal capacity of 50 t/h, equipped with a oxidizer, gas coolers, and baghouse. Production was limited due to the high moisture content exceeding 40 percent.
