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Pre-field Activities • A pre-work site meeting was conducted on September 3,2014, during which Jonathan Shlee with L Caltrans, Robert Kimball with Geocon, and Tommy Henson with Comcast reviewed the project site and scope. The corroded UST measuring roughly 5.5 feet long by 44 inches in diameter was exposed. Based on the presence of solid contents (soil and dried drilling fluid), it was determined ` that the UST should be removed instead of closed in-place. The UST solid contents were subsequently sampled on October 24, 2014, to confirm suitability for non-hazardous waste disposal. • Obtained a UST removal permit from the SJCEHD. A copy of the SJCEHD UST removal permit approval letter(Service Request SR0070613)dated November 22,2014, is in Appendix A. • Contact Underground Service Alert (USA Ticket No. 458872) a minimum of 72 hours prior to the field activities. • Updated the October 2013 Health and Safety Plan to provide guidelines on the use of personal protective equipment and the health and safety procedures implemented during the field activities. • Retain the services of Advanced Technology Laboratories (ATL), a Caltrans-approved and California-certified analytical laboratory located in Signal Hill, California, to perform chemical analysis of soil samples. • Retain the services of AVLS for the transportation and disposal of the non-hazardous waste tank solids. UST Removal Activities We completed the UST removal activities on December 4 and 5, 2014. The tank removal and soil sampling was observed by Mr. Jeff Wong with the SJCEHD. The approximate 400-gallon tank was exposed and found to be extremely deteriorated with numerous corrosion holes(Photo No. 1). The tank top was split open to allow removal of the solid contents using a mini-excavator, The solid material was placed into three labelled 55-gallon drums that were transported by AVLS as non-hazardous petroleum-contaminated solids to the Recology Ostrom Road landfill facility in Wheatland, California. Copies of the non-hazardous waste disposal manifest and weight ticket are in Appendix B. Following removal of the solid contents, the lower explosive limit (LEL) reading of the tank was monitored at 0.0%. The tank was then cut away from the Comcast fiber optic conduit using a non- sparking pneumatic cutting tool to facilitate removal (Photo No. 2). The tank was subsequently cut into pieces using the non-sparking pneumatic cutting tool. The suspected fuel dispenser location at the southwest corner of the building was determined to be associated with a former light pole. The exposed tank product line was determined to extend approximately 3 feet to just inside the adjacent building(Photo No. 3). A former tenant of the property 6, confirmed that a capped pipe is located just inside the rollup door behind the structural column. The former tenant was aware of the UST and the former fuel dispenser. We removed the product line using a chain to facilitate soil sampling at the former interior fuel dispenser location. The tank and ` associated removed piping were transported to the Sims Metal facility in Sacramento, California, for scrap recycling. Copies of the completed SJCEHD UST Tank Disposition Tracking Record, Linden UST Removal Report,TO No.34 Caltrans Contract 06A1895,EA No. 10.OY3600 Geocon Project No.S9800-01-34 -2- December 22,2014