This document presents the results from the remedial investigation and feasibility study for Operable Unit (OU) B1 at McClellan AFB, Sacramento, CA. Operable Unit B1 includes the Defense Reutilization and Marketing Office (DRMO) storage lot and Civil Engineering storage lot at McClellan AFB. The main chemicals of concern are PCBs, dioxins, and furans which may have leaked from transformers stored at OU B1 or were constituents of waste oil applied to soils to control dust. Sections 1.0 through 4.0 of the report present results from the RI, the potential for contaminant migration/transport from OU B1 and the current and future risks associated with OU B1. The FS begins in Section 5.0 identifying the remedial action objectives, in Sections 6.0 and 7.0, technologies are screened and potential remedial alternatives are developed. The final six remedial alternatives are analyzed and compared to each other using the criteria established in the NCP in Section 8.0.

The comprehensive CERCLA workplan presents the approach to the Remedial Response Program for McClellan Air Force Base as required under the Interagency Agreement (IAG), signed on 2 May 1990.

The purpose of the Remedial Investigation/Feasibility Study Report is to provide a comprehensive description of Kotzebue LRRS, including the installation's operational history and environmental setting; a summary of past IRP investigations at the site; a detailed description of the 1994 remedial investigation; a site conceptual model integrating available site information; and site-specific summaries and recommendations. This document also incorporates a feasibility study which identifies cleanup objectives, evaluates various remedial action alternatives, and recommends appropriate actions to meet cleanup objectives.