Superfund Record of Decision (EPA Region 6): Crystal City Airport, Zavala County, Texas (First Remedial Action), September 1987

摘要

The Crystal City Airport (CAA) site, comprising approximately 120 acres, is located in Zavala County, Texas. CCA began operations during World War II as a military installation for transporting and detailing persons of Japanese descent. In 1949, the U.S. Government deeded the airport to Crystal City. Since then, the city has operated the facility as a municipal airport. Several private aerial pesticide applicating companies conducted business at the airport until 1982. In April 1983, the Texas Department of Water Resources investigated the site because of the potential threat to local residents of waste pesticides left by applicating companies no longer in operation. Surficial soil at the site was found to be highly contaminated with pesticides. In October 1983, an Immediate Removal Action, initiated by the U.S. EPA, consolidated 40 cu. yds of waste and 50-70 drums in two onsite disposal cells. In May 1984, a second removal action disposed of 19 drums offsite and secured the site with a fence. Approximately 12,000 cu. yds of surface soil are contaminated with pesticides including: DDT, toxaphene and arsenic. The selected remedial action includes: onsite consolidation of contaminated soil, drums and buildings; multi-layer RCRA capping; offsite injection well; disposal of decontaminated liquids; and fencing. The estimated present worth cost for the remedy is $1,600,000.