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Introduction <br /> 1.1 Purpose <br /> The purpose of the proposed supplemental site assessment activities are to adi Iress data gaps that may be <br /> remaining and to define the extent of contamination, if found,when possible. This Workplan outlines the <br /> approach for site characterization(where warranted) at each of the 11 AOCs I fisted below. This document <br /> is also intended to be a brief summary of the information known about each targeted AOC and the <br /> proposed further activities where necessary. Information regarding field and decontamination procedures <br /> can be found in the Sampling and Analysis Plan presented in Appendix A. The health and safety program <br /> is described in the Health and Safety Plan presented in Appendix B. <br /> The AOCs identified by the DTSC are as follow: <br /> • Pentachlorophenol Areas <br /> • Underground Storage Tanks <br /> • Former Teepee Structure <br /> • Former Burn Pits <br /> • Steamcleaning and Western Ditch Areas <br /> • Septic Tanks <br /> • Wash Down Areas <br /> • Storm Water Retention Ponds <br /> • Polychlorinated Biphenyl Containing Transformers <br /> • Asphalt Rubble Area <br /> • Volatile Organic Compounds/Formaldehyde <br /> Draft <br /> KB61125 workplan-ESC MACTEC Engineering and Consu ting, Inc. 4 <br /> September 28,2005 <br />