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November 2010 P0960018t*s, Project No. 1001-0343 eaoaaseaa,atoll CMIS"a ® trrvaowrawru.aauMron The relatively flat surface of the San Joaquin Valley is underlain by alluvial, lacustrine, and marine sedimentary deposits that accumulated as the structural trough formed as the adjacent mountain ranges were elevated through tectonic processes. The thickness of the sediments varies from a thin veneer along the valley margins to thousands of feet thick at the axis of the trough. The main axis of the trough is oriented north-south along the valley's main drainage axis. Based on available reports (Geotracker) of nearby leaking underground storage tank (LUST) sites located west of the Project Site, groundwater is expected to be present at an approximate depth of 12 to 15 feet below ground surface. Additionally, shallow groundwater has been estimated to flow towards the southwest. 3.0 SCOPE OF WORK 3.1 PREPARATION OF SITE HEALTH & SAFETY PLAN Padre has prepared a site-specific Site Health & Safety Plan (HSP) for the subject soil and groundwater assessment program, which is attached as Appendix B. The HSP includes procedures, equipment, and materials/supplies employed to protect worker and community health and safety during the course of the assessment activities. The HSP also includes provisions for daily tailgate safety meetings. The HSP portion of the document details all necessary procedures, monitoring equipment, and other methods that will be employed to protect worker and community health and safety throughout the course of the assessment program. The HSP lists the chemical compounds most likely to be encountered during the field operations, and presents established exposure levels that will not be exceeded. In addition, the HSP lists the nearest appropriate hospital facility. All on-site personnel will be required to familiarize themselves with and sign the HSP in an attempt to minimize the potential site hazards. 3.2 PERMITS Padre will submit the appropriate drill hole permit application, fee, and supporting documentation to the San Joaquin County Environmental Health Department (SJCEHD) and will coordinate with the SJCEHD regarding abandonment of the drill holes. 3.3 CLEARANCE OF ASSESSMENT LOCATIONS FOR UTILITIES AND PIPELINES Padre will complete a pre-assessment site visit approximately 5- to 10-days prior to the scheduled start of field activities. During the course of the pre-assessment site visit, Padre will demarcate the surface location of each proposed drill hole location with a painted white symbol. Also, during this site visit, any significant site features (i.e. overhead power lines, sewer lines, trees, etc.) will be noted and discussed with Padre's project manager prior to the start of work. Immediately following the site visit, USA will be notified. As part of the notification, USA will be informed of the type of work planned, including the number of drill hole locations, and will be 1 10.0343.TWP HSP aSw=nent - - - 3 -