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FN Appendix 8—Subject Properties and Adjacent Sites Summaries Port of Stockton, Stockton, CA Rough and Ready Island —APN: 16203004 3505 NAVY DRIVE,TOSCO REFINING COMPANY The potential contaminants of concern at 3505 Navy Drive include diesel, gasoline, and VOCs. The potential media of concern are an aquifer used for drinking water supply and soil. Tert-butyl alcohol (TBA) and methyl tert-butyl ether (MTBE) plumes measuring approximately 700 ft at their longest formerly extended to the southwest towards the Site. Remedial action at the site between 2003 to 2006 removed approximately 25 pounds of petroleum hydrocarbons from groundwater, and an oxygen injection system was operated at the site from 2007 to 2010. On May 6th, 2014, the site was issued a No Further Action letter. The historical release of diesel, gasoline, and VOCs to soil and groundwater at this address and the extent of the related groundwater contaminant plumes represent an HREC for the Site. Rough and Ready Island —APN: 16203008 3515 NAVY DRIVE, SHELL OIL PRODUCTS—STOCKTON TERMINAL The potential contaminants of concern at 3515 Navy Drive include diesel and gasoline, and the potential medium affected is an aquifer used for drinking water supply. Since April loth, 2006, a groundwater monitoring program has been ongoing. TPH-gasoline, TPH-diesel, benzene, methyl tert-butyl ether (MTBE), and tertiary butyl alcohol (TBA) plumes measuring approximately 600 ft at their longest extend to the southwest towards the Site. The release of diesel and gasoline to groundwater at this address and the extent of associated groundwater contaminant plumes represents a REC for the Site. Moss Tract -APN: 14502013 2829 WEST WASHINGTON STREET, LESCO, INC. The potential contaminants of concern at 2829 West Washington Street are arsenic, nitrate, and other inorganic/salt with affected media including groundwater and soil. The most recent monitoring report concluded that past soil removal resulted in the decrease of nitrate, ammonia, arsenic, and vanadium concentrations at this site, but also that a stable trend existed for sulfate concentrations in groundwater. On July 5th, 2017, a No Further Action letter was issued by the RWQCB. The historical release of arsenic and nitrate to soil and groundwater at this address represents an HREC for the Site. Moss Tract -APN: 14502009 THE RICE TERMINALS Elevated concentrations of nitrate and ammonia were detected in soil and groundwater near the Rice Terminals in 2005 but were shown to have decreased dramatically in 2014. A 2015 report concluded there is no ongoing source of fertilizer related compounds to soil or groundwater at