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e ARCADIS July 30, 2013 Background Seven underground storage tanks (USTs)were previously located onsite for the storage and distribution of petroleum hydrocarbons by a prior tenant and were removed in 1993. However, historical records indicate that a release of diesel fuel at the site occurred in 1993. In response to the release of diesel fuel, remediation efforts were completed and site closure was obtained in 1996. UPS is interested in purchasing the property from the current owner and is initiating an investigation in the vicinity of the former USTs and dispensers to assess soil and shallow groundwater quality. Impacts to soil and shallow groundwater, or lack thereof, will be documented and provided to SJCEHD. Investigation Objectives The objective of the proposed investigation activities is to assess for the presence of petroleum hydrocarbons in soil and groundwater in the vicinity of historical USTs at the site. This objective will be accomplished by advancing up to eight borings(Figure 3)at the site in accordance with the methods and procedures described below. The proposed locations of these borings are contingent upon access and presence of underground utilities and may need to be modified accordingly. Investigation Methods and Procedures The following presents the activities to be completed prior to and during investigation activities. Underground Service Alert, Utility Clearance, Permitting, and Access Agreements Prior to commencement of investigation activities, and in accordance with state law, Underground Service Alert(USA)will be notified of the intent to conduct subsurface investigations at least 48 hours prior to initiation of intrusive field tasks.The proposed sampling locations will be clearly marked with white paint or surveyor's flagging as required by USA. USA will notify utility owners of record within the site vicinity of the intention to conduct subsurface investigations. The utility owners of record, or their designated agents, will be expected to clearly mark the position of their utilities on the ground surface throughout all publicly owned areas designated for investigation. Page: G UFPUBIIGY R?q IUPSUaIhWP E 1 Rm UPS SHJ_M..E 215