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15 February 2016 AdvancedGeo AGE Project No. 12-2181 Environmental Page 15 of 23 4.1. FACILITY DRAINAGE (40 CFR 112.8(b)) AST areas at the Facility are not exposed to precipitation. Any potential discharge from ASTs will be restrained by secondary containment structures. Discharges occurring during unloading operations will be restrained by the on-site oil water separator or spill kit equipment and absorbents until cleanup can occur. Spills occurring from the single- wall AST will be captured by an oil-water separator, which will prevent a discharge from entering the Facility drainage system. In the event of drainage events, the form included in Appendix G of this Plan utilized to record the event; records are maintained at the Facility for at least three years. 4.2. BULK STORAGE CONTAINERS (40 CFR 112.8©) Table 8 summarizes the construction, volume, and content the of bulk storage containers at the Facility. 4.2.1. Construction (40 CFR 112.8 (c)(1)) All ASTs used at this Facility are constructed of steel, in accordance with industry specifications as described above. The design and construction of all bulk storage containers are compatible with the characteristics of the oil product they contain, and with temperature and pressure conditions. There is no piping between fixed ASTs. Piping of each product does have dedicated piping and pumps for dispensing. 4.2.2. Secondary Containment (40 CFR 112.8(c)(2)) Both the 10,000-gallon diesel and 550-gallon waste oil ASTs are constructed of double wall and have internal secondary containment sufficient to contain all contents. The single-walled 600-gallon oil AST is located in an area where the concrete is sloped towards the on-site oil-water separator. The separator is approximately 1,500-gallons in size and can sufficiently contain 110% of the oil AST. Each 55-gallon drum is stored on a spill pallet, big enough to hold the largest container size of 55-gallons. The secondary containment structures are visually inspected daily. The condition of the containment, other spill control structures and equipment is documented monthly utilizing the Facility inspection forms included in Appendix B. Inspections of containment areas includes discussion of the detection of any crack, signs of heaving or settlement, or other structural damage that could affect the ability of the structure to contain oil. Any damage is promptly corrected to prevent migration of oil onto any Facility surface.