Record Display for the EPA National Library Catalog
RECORD NUMBER: 25 OF 3663
|OLS Field Name||OLS Field Data|
|Main Title||Accutech pneumatic fracturing extraction and hot gas injection : phase 1. Volume 1 /|
|Author||Skovronek, Herbert S.|
|CORP Author||Science Applications International Corp., Hackensack, NJ.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.|
|Publisher||Risk Reduction Engineering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,|
|Report Number||EPA/540/R-93/509; EPA-68-CO-0048|
|Subjects||Hazardous wastes--Research--United States. ; Hazardous waste treatment facilities--United States.|
|Additional Subjects||Superfund Innovative Technology Evaluation Program (U.S.) ; Land pollution control ; Remedial action ; Soil treatment ; Volatile organic compounds ; Fracturing ; Performance evaluation ; Vadose water ; Injection ; Technology innovation ; Cost analysis ; Quality assurance ; Soil vapor extraction ; Pneumatic fracturing extraction|
|Collation||165 pages : illustrations ; 28 cm.|
The Pneumatic Fracturing Extraction (PFE) process developed by Accutech Remedial Systems, Inc. makes it possible to use vapor extraction to remove volatile organics at increased rates from a broader range of vadose zones. The low permeability of silts, clays, shales, etc. would otherwise make such formations unsuitable for cost-effective vapor extraction and require more costly approaches. Pneumatic fracturing provides an innovative means of increasing the permeability of a formation and thus extending the radius of influence so that contaminants can be effectively extracted. In the PFE process, fracture wells are drilled in the contaminated vadose zone and left open bore (uncased) for most of their depth. A packer system is used to isolate small (2 ft) intervals so that short bursts (- 20 sec) of compressed air (less than 500 psig) can be injected into the interval to fracture the formation. The process is repeated for each interval. The fracturing extends and enlarges existing fissures and/or introduces new fractures, primarily in the horizontal direction. When fracturing has been completed, the formations then subjected to vapor extraction.
"SITE, Superfund Innovative Technology Evaluation"--Cover. "July 1993." "EPA/540/R-93/509." Microfiche.