Record Display for the EPA National Library Catalog


Main Title Hydraulic Fracturing to Improve Nutrient and Oxygen Delivery for In situ Bioreclamation.
Author Versper, S. J. ; Davis-Hoover, W. J. ; Murdoch, L. C. ; Pahren, H. R. ; Sprockel, O. L. ;
CORP Author Cincinnati Univ., OH. ;National Urban League, Inc., Cincinnati, OH. Center Hill Lab. ;Cincinnati Univ. Medical Center, OH.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher c1991
Year Published 1991
Report Number EPA-68-C9-0031; EPA/600/J-91/276;
Stock Number PB92-121334
Additional Subjects Land reclamation ; Remedial action ; Biological treatment ; Hydraulic fracturing ; In-situ processing ; Biodeterioration ; Nutrients ; Oxygen compounds ; Land pollution ; Waste disposal ; Field tests ; Fluid injection processes ; Boreholes ; Encapsulation ; Performance evaluation ; Reprints ; Slow releasing chemicals
Library Call Number Additional Info Location Last
NTIS  PB92-121334 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 18p
A serious problem in the implementation of in situ bioreclamation is the delivery of nutrients and oxygen to soil of low permeability. The problem commonly requires contaminated soil to be excavated for bioreclamation, resulting in increased exposure to toxic materials, liability and cost. The authors demonstrated that is feasible to create hydraulic fractures at shallow depths (several m) in silty clay till. Fractures created during a recent field test were flat-lying and roughly equant in plan with a maximum dimension of 8 m. Coarse sand was pumped into the fractures to hold them open. The sand was an average of 1.1 cm in maximum thickness. As many as four fractures were created from the same borehole, stacked at vertical spacing of 15 or 30 cm. The technique will be used to deliver slow-releasing granules of nutrients and encapsulated oxygen compounds in an effort to enhance in situ bioreclamation of contaminated soil.