An Evaluation of Engineering Modifications Designed to Remove Airborne Chlordane from Crawl Space Houses at McConnell AFB, Kansas
Abstract
A study was conducted to evaluate the effectiveness of engineering modifications to remove airborne chlordane in crawl space houses at McConnell AFB. The soil around and under the houses was treated with a 1% chlordane emulsion in 1974 and 1979. The ventilation ducts are located in the crawl space. The following engineering modifications were developed for study: (a) sealing the crawl space soil with a concrete cover, and (b) closing the return air ducts from the crawl space, rerouting the return air inside the house and completely sealing the crawl space from the basement. The modifications were to be tested singularly and in combination. The study showed that: The correlation between temperature and chlordane concentration found during a previous study was strongly reinforced. The concrete seal or reducting modification reduces chlordane intrusion as well as the combination of them; consequently, the combination modification is not needed. The concrete seal can keep chlordane levels below 5 micrograms/cm at a higher level of confidence. Concrete sealing of the crawl space soil should be selected as the best engineering modification. As an interim precaution, polyurethane filters should be installed in all houses with chlordane levels greater than 5 micrograms/cm. Filters should be replaced every 30 days. The attached report provides an analysis of the sampling data and a detailed discussion of the recommendations. Keywords: Termite treatment; Family housing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1984
- Accession Number
- ADA208383
Entities
People
- Edward S. Barnes