1. Hazardous Waste and Consolidated Permit Regulations Federal Register Section 260.20 and 260.21 May 19 1980 p. 33127.
2. “Preliminary Subsurface Investigation for Turnpike Distribution Center Phase II Dallas Texas ” Southwestern Laboratories prepared for Trammell Crow Company SWL Report Number 80–611 July 1980 p. 4.
3. Soil Survey of Dallas County Texas U.S. Department of Agriculture Soil Conservation Service prepared in cooperation with the Texas Agricultural Experimental Station Feb. 1980.