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Mr.Robert Gray Environmental 17 June 2014 Resources Page 2 Management been in operation for over 30 years. The southern station,with three injector units,K-7 through K-9,has been in operation since 2008. INVESTIGATION OBJECTIVES The investigation was designed to characterize potential impacts to shallow soil at the site from total petroleum hydrocarbons (TPH), ethylene glycol,California Assessment Manual(CAM) 17 metals, and volatile organic compounds (VOCs). SUBSURFACE CLEARANCE AND PERMITTING Before commencing field work,a boring permit was obtained from the SJCEHD (Attachment 1). Underground Service Alert was notified to verify that no active underground utility lines existed that would be affected by the work. A private utility locator also surveyed and marked the utilities prior to commencing field work.Some sampling locations were moved from the Workplan locations to avoid encountering marked utilities or other obstacles. The final sampling locations are shown on Figure 2. ERM's policy for the protection of subsurface utilities requires hand- clearing all boring locations to a minimum depth of 5 feet,and to 8 feet when within the critical zone,which is defined as being within 5 feet of a known utility. All the locations designated for 10-foot samples fell within the critical zone, and therefore were required to be hand-cleared to a minimum depth of 8 feet below ground surface (bgs). While the Workplan called for the use of a direct-push rig to collect samples below 5 feet,because the 10-foot samples needed to be hand-cleared to 8 feet,it was decided to collect the 10-foot samples by hand auger rather than mobilizing the drill rig to push the remaining 2-foot interval. HEALTH AND SAFETY A site-specific health and safety plan was developed to address the potential hazards associated with the planned field work. All ERM personnel, subcontractors,and site visitors were given a safety briefing