Golder Associates

Resolution Copper Mining, LLC (RCML) is submitting for the Arizona State Mine Inspector’s review and approval this Mined Land Reclamation Plan (MLRP) for the Superior Mine in the area of Superior, Arizona.

The purpose of this Site Characterization Report is to provide a summary of existing relevant environmental data to characterize smelter affected soil at the West Plant Site, and to evaluate that data for use in the development of human health risk-based site-specific soil remediation standards (SSSRLs) for the West Plant Site.

This report provides the necessary background information to support an Individual Aquifer Protection Permit (APP) application for a new Development Rock Stockpile at the Superior Mine, West Plant Site, in Superior, Arizona.

This report describes the development of a numerical groundwater flow model of the West Plant Site (Site) and the modeling results. The Site is located immediately north of the town of Superior, Arizona, as shown on Figure 1. The model was developed in accordance with the Groundwater Assessment and Model Workplan, which was submitted to the Arizona Department of Environmental Quality (ADEQ) on November 21, 2007 (Golder, 2007).