ARCHIVED REPORTS_PHASE II ENVIRONMENTAL SITE ASSESSMENT

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W GllR, . So ui thwe s t, Inc. 7.2 Health and Safety Plan A site specific Health and Safety Plan detailing known or potential hazards and emergency response procedures was prepared for the investigation. It was present on site during all field activities. A safety meeting was conducted prior to the start of each day's field activities, and all field personnel reviewed and signed the Health and Safety Plan. 7.3 Drill Site Clearance and Siting of Borings Prior to the initiation of drilling operations, a site visit was conducted by WGR on February 15, 2008 in order to mark the boring locations. Due to winter rains many of the boring locations were surrounded by or covered with ponded water and were inaccessible. After conferring with the client and client's representatives, the decision was made to postpone drilling until the site had dried out and the originally planned boring locations were accessible. On May 1, 2008 another visit was made to the site by WGR, and the proposed boring locations and areas of exploratory excavation were marked with paint and flagged. The proposed borings were labeled B-1 through B-18, and their locations are shown on Figure 2. Underground Service Alert (USA) was contacted to identify any potential subsurface • obstructions and/or conflicts in or adjacent to the marked locations. To further ensure that no underground utilities or obstructions were present in the proposed drilling locations, approximately the initial two to four feet of drilling in each location was advanced utilizing a hand auger. The borings were positioned in areas identified as RECs in the Phase I and considered to have a relatively high potential for soil contamination. B-1, B-2, B-5, B-11, B-12 and B-18 (see Figure 2) were located in areas mapped as former depressions on the referenced Storm Water Pollution Prevention Plans (SWPPPs) where storm water was concentrated in the past. B-1 and B-2 were located adjacent to the site boundary with ST Services Terminal. B-3 through B-6 and B-13 through B-18 were located where processing and/or stockpiling of metals had reportedly occurred in the past (Hugo Neu & Sons, 1992 and The Learner Company, 1997) or was observed during the Phase I. B-3 and B-4 were also located near former or current motor block stockpiles. B-7 was located adjacent to the remedial excavation for the August 2007 PCB release near the former shredder. B-8 was positioned as near as possible to the sump in the hazardous materials container storage area, and B-9 was located adjacent to the ASTs and former USTs. B-10 was located just outside the equipment wash pad along the north side of the maintenance shop. B-12 was positioned where the recycled water tank truck was noted to • be leaking during the Phase I, and also near the PG&E substation. B-16 was located along the 704. PRI.05 16 July 21, 2008