Diagnostic Tools for Integrated In Situ Air Sparging Pilot Tests
Abstract
Pilot tests are an important tool for improving our conceptual understanding of in situ air sparging (IAS) behavior at a site. Unfortunately, prediction of long term performance based on pilot tests has proved to be difficult (Johnson, et at., 1997). Nevertheless pilot tests have proven useful as a means of identifying 'red flags' prior to installation of lull-scale systems. In that context, IAS pilot tests are most useful when designed to: (a) look for indicators of infeasibility, (b) characterize the air distribution to the extent practicable, and (c) identify any safety hazards to be addresses in the lull-scale design. Prior to conducting the pilot test activities outlined in the paper the following tasks should be completed (J.P. Johnson et at., 2000): (1) Define the target treatment zone (2) Propose a conceptual model for the air distribution in the treatment zone (3) Determine if 15 ft well spacings are cost prohibitive, and if so, determine the minimum injection well spacing that is not cost prohibitive. (4) Propose the depth, location, and construction specifics of a pilot test well. (5) Determine the expected range of operating pressures for the injection well. If based on the previous site activities IAS is chosen as the remediation technology for the site, it is recommended that the series of pilot test activities described in the report be conducted. If in the preliminary assessment it was determined that the well spacings of 15 feet are cost effective, the first six activities described in the report should be conducted. If a greater well spacing is required, additional site-specific activities should be conducted. These are also described in the report.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2001
- Accession Number
- ADA405906
Entities
People
- Andrea Leeson
- Bruce Tim
- Illa Amerson-treat
- Paul C. Johnson
- Richard L. Johnson
Organizations
- Battelle Memorial Institute