The Environmental Protection Agency (EPA) has selected a site in the town of Naco, Arizona as a Brownfields Assessment Demonstration Pilot and awarded a grant to the Naco Fire District and Arizona State University to perform Phase I and II environmental assessments. The Phase I historical background research and findings suggested that further soil sampling should be performed in the area of concern. Different pesticides may have been used on the site, which was a cattle-crossing operation until the 1980s. Also, there has been intermittent sewage runoff from a wastewater...