O&M Effort for the Bioventing System at the 7th Street BX Service Station (May through August 1992), Eglin, AFB
Abstract
Operation and maintenance for the first quarter since installation has included a check on each of the bioventing system components (i.e., blower, gauges, air filter, vapor extraction wells, and injection trenches) to evaluate operating status and to make adjustment where appropriate or necessary. Over the period May 20 through July 22, 1992 no significant adjustment was made to the system other than increasing the air dilution rate at the air dilution valve on the intake to the blower unit. This adjustment was made to reduce off gas concentration at the injection trenches and to minimize emission of gases into the atmosphere. Prior to making this adjustment a pressure relief valve was installed downstream of the blower. The air filter has been changed twice to maximize air flow from the air intake line to the blower and to ensure removal of fugitive materials. Because of continued reports of strong gasoline odor at the gasoline station, a decision was made to replace the existing 2 horse power (hp) blower unit being used with a 1 hp unit. On August 3, 1992, the 2 hp blower was replaced with a I hp blower. A recent visit to the site on August 20 revealed the blower has not been operating continuously because of power failures associated with frequent storms in the area. A decision was made to rewire the starter for the blower to allow continued operation once power is restored after a storm event. Rewiring of the starter will be completed the week ending August 28. An in-situ respiration test was scheduled for August 27 and 28; however, this has been temporarily postponed due to Hurricane Andrew. The respiration test will be performed to ensure that nutrients, moisture, or oxygen are not limiting biodegradation. The respiration test will include oxygen and carbon dioxide monitoring over a 40 to 60 hour period as described in the work plan for this project.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 25, 1992
- Accession Number
- ADA385610