The South Minneapolis Soil Contamination Superfund Site, located in Minneapolis, Minnesota, contains elevated concentrations of Arsenic in the surface soils. From the 1930s through the 1960s, the CMC Heartland Light Yard facility (CMC) produced Arsenic-containing pesticides at a site in South Minneapolis. At this site Arsenic was transported via railcars, conveyor belts, and vehicular traffic. It is also believed that, during site activity, Arsenic may have been stored outdoors in large piles (Geomega, 2004). Collectively, these activities may have resulted in air dispersion of Arsenic into the neighboring residential and commercial properties. In the 1990s, Arsenic was detected in soil at the CMC site at concentrations up to 3,000 times greater than background levels. The state of Minnesota recognized the impacts that the elevated Arsenic concentrations posed to human health and the environment and began sampling surface soils at nearby residential properties for Arsenic concentrations. The CMC site was remediated from October 2004 through July 2005 by CMC Heartland Partners and U.S. Borax, as required by the Minnesota Department of Agriculture (MDA). Following the remediation of the CMC property, state and federal (U.S. EPA) agencies continued sampling for Arsenic concentrations in the residential surface soils surrounding the CMC site in order to identify the source and extent of Arsenic contamination. Surface soil samples discussed in this report were collected between 2001 and 2006 by the State of Minnesota and the U.S. EPA.