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Page 3 Area C—530 Building: Area C is located south of the main hospital building, bound to the north by Acacia Street, Harrison street on the west, Lincoln street to the east, and Poplar Street to the south. This area has a 250-gallon above-ground storage tank (AST) with a generator inside an outdoor enclosure. The 250-gallon AST is located within a UL approved secondary containment base tank with high level alarms and interstitial monitoring of tank bottom. The total maximum above ground storage is 10,945 gallons, and the maximum underground storage is 6,000 gallons. The total maximum storage at this site is 16,945 gallons. 1.E Drainage Pathway and Distance to Navigable Waters In accordance with§112.7(b) Dameron Hospital is stationed approximately half a mile north of McLeod Lake and half a mile south of Yosemite lake, which are both connected to the San Joaquin River. With the quantities stored on site and the countermeasures in place, it is unlikely that petroleum products will reach the waters in the event of a spill (see Section III for more information). The storm drain catch basins located nearest the above ground tanks are fitted with bio-filters to further reduce the amount of petroleum product that may enter the system due to spills occurring during the re- filling operations. See Figure A-2 in Appendix A for the exact location of these catch basins. The municipal storm drains within Dameron Hospital discharge into Yosemite Lake. 1.F Security In accordance with§112.7(g) All locations are monitored by security cameras and security personnel 24 hours per day— tank sites are well illuminated and are well secured. Area A: The 10,000-gallon AST is located at the Central Utility Plant behind a 10-foot masonry wall that is kept locked. The fill unit is also key-locked. The two (2) 250-gallon day tanks are located inside the generator room that is kept locked as well. Area B: The 50-gallon, 100-gallon and 275-gallon day use tanks associated with the exempt 6,000-gallon UST, are located in the original boiler room within the main hospital. This room is secured and locked at all times. Area C: The 250-gallon AST is secured within a masonry wall enclosure with a metal sliding door and inside a secondary containment unit with additional security locks. 1.G Spill Prevention Control and Countermeasures Plan In accordance with§112.7(a)3 A physical layout of the facility and the depiction of information provided in this plan is provided in Attachment A. It includes a Vicinity Map, Site Map, and Figures A3—A-5. Dameron Hospital Spill Prevention Control and Countermeasure Plan June 12,2020