Overview
EPA confirmed nearly 3,000 new releases from underground storage tanks (USTs) during fiscal year 2010, bringing the cumulative total to 491,572 releases since 1984. Although progress has been made in cleaning these sites, over 96,000 of them still require remedial action. (Source: Semiannual Report of UST Performance Measures, Mid Fiscal Year 2010, 3/31/2010.). These UST leaks pose a grave threat to human health and the environment by contaminating groundwater and soil.
Landfarming involves spreading contaminated soil in a thin layer on the ground surface and stimulating aerobic microbial activity within the soils through aeration and/or the addition of minerals, nutrients, and moisture. Aeration is accomplished by tilling or plowing the top layer of soil. The enhanced microbial activity results in degradation of adsorbed petroleum product constituents through microbial respiration. These sites typically include leachate collection, vapor control, erosion control, stormwater management, and monitoring wells.
This course is intended for environmental engineers who wish to expand their knowledge of alternative methods of site remediation. The course material is extracted from Chapter 5 (October 1994), of EPA publication EPA 510-R-04-002, How to Evaluate Alternative Cleanup Technologies for Underground Storage Tank Sites: A Guide for Corrective Action Plan Reviewers. Updated May 2004.
To obtain PDH credit, the student must pass a multiple-choice quiz of ten (10) questions.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- Detailed evaluation to determine the suitability of landfarming
- Influence of soil properties, contaminant properties, and climatic conditions on effectiveness
- Design considerations for a landfarming site
- Remedial progress monitoring
Course
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
Landfarming for Soil Remediation
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