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Project are being overseen by the California Department of Toxic Substances Control (DTSC). The SJCEHD is continuing to oversee four areas with underground storage tank (UST)releases at the Banner Island Project, including the Carando Site, under their local oversight program (LOP). Until March 2004, the Site was occupied by several buildings, shown on Figure 2. During March 2004 the buildings were demolished in preparation for redevelopment. Prior to the City's purchase, the Site had been vacant for several years and had previously been operated as a dealership and service center for Chase Chevrolet. This site was originally developed in the early 1900s and re-developed sometime after the mid 1960s for use as an auto dealership. Areas between buildings are mostly unpaved, but there are areas of pavement or are covered with concrete slabs (Figure 1). Underground Storage Tank remediation activities have taken place at the Site since the late 1980's. The Site is enrolled in the Underground Storage Tank cleanup fund. A 1,000 gallon UST which reportedly stored gasoline and diesel, identified as Tank No 7,was removed in 1986 and petroleum hydrocarbon contamination was documented during the removal. A free-product skimmer was used at well MW-3, located adjacent to the former UST location from prior to 1994 until 1996. A soil vapor extraction system, including 23 air sparging wells, began operation in November 1999 and operated until February 2001. In June 2003 an ozone sparging system with 17 wells began operation at the site. Recent quarterly monitoring at the site has been performed under the oversight of the SJCEHD using 12 groundwater monitoring wells (nine on-site and three off-site). Five of these wells are sampled and the remainder are used for groundwater elevation measurements. During December 2003 Treadwell &Rollo submitted a well destruction workplan to the SJCEHD (Treadwell & Rollo 2003b), which was accepted on 12 January 2003 (SJCEHD 2003b). Section 4.0 discusses the well destruction activities. 2 259710I4.DGD 7 April 2004