Passive vapor extraction feasibility study

Technical Report · Thu Jun 30 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10169375· OSTI ID:10169375

Rohay, V J

Demonstration of a passive vapor extraction remediation system is planned for sites in the 200 West Area used in the past for the disposal of waste liquids containing carbon tetrachloride. The passive vapor extraction units will consist of a 4-in.-diameter pipe, a check valve, a canister filled with granular activated carbon, and a wind turbine. The check valve will prevent inflow of air that otherwise would dilute the soil gas and make its subsequent extraction less efficient. The granular activated carbon is used to adsorb the carbon tetrachloride from the air. The wind turbine enhances extraction rates on windy days. Passive vapor extraction units will be designed and operated to meet all applicable or relevant and appropriate requirements. Based on a cost analysis, passive vapor extraction was found to be a cost-effective method for remediation of soils containing lower concentrations of volatile contaminants. Passive vapor extraction used on wells that average 10-stdft{sup 3}/min air flow rates was found to be more cost effective than active vapor extraction for concentrations below 500 parts per million by volume (ppm) of carbon tetrachloride. For wells that average 5-stdft{sup 3}/min air flow rates, passive vapor extraction is more cost effective below 100 ppm.

• Research Organization: Westinghouse Hanford Co., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-87RL10930
• OSTI ID: 10169375
• Report Number(s): WHC-SD-EN-TI--245; ON: DE94015672; BR: 35AF11201/35AF11202
• Country of Publication: United States
• Language: English

Related Subjects

054000
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
540250
ADSORPTION
CARBON TETRACHLORIDE
CONTAMINATION REGULATIONS
COST ESTIMATION
DEGASSING
ECOLOGICAL CONCENTRATION
HANFORD RESERVATION
HEALTH AND SAFETY
POLLUTION REGULATIONS
REMEDIAL ACTION
SITE RESOURCE AND USE STUDIES
SOILS
WIND TURBINES