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} ni�i� � fi � tt 5 . O FACILITY OIL STORAGE rc f,5 p ,,n alb ° 6 it dtii.2 1 5 . 1 Overview of Facility Storage, Discharge Prevention Procedures, and Drainage Controls Ref: 40 CFR 112 .7(a )(3)( i)-( iii); Ref: EPA Response to Industry Questions, Sep. 30, 2002 : Guidance on berms, dikes, liners, etc. ; Ref: 2013 SPCC Guidance for Regional Inspectors. There are a variety of oil storage tanks located throughout the Facility . A summary table of the Facility' s oil product storage ( containers of 55 -gallons and larger) and associated secondary containment and drainage control is presented in the table located in Appendix D . Discharge prevention measures for the Facility include secondary containment around oil tanks, spill kits maintained in close proximity to tanks, procedures for handling oil products, regular tank inspections, and the Facility drainage . The Facility' s drainage is designed to retain surface flow on -site . Spill response materials will be available near the stored oil products to clean up small leaks and spills ( see Appendix D for locations of spill response materials and Appendix E for spill response procedures) . Facility personnel trained in spill prevention and emergency spill response will be present during oil transfer activities at the tanks . The tanks and associated secondary containment will be inspected regularly as described in section 6 .0 . Secondary containment measures include : Area A — Hot Plant Area A has a concrete secondary containment structure 24 inches in height surrounding three ( 3 ) 30,000- gallon hot asphalt oil tanks, one ( 1 ) 1, 000-gallon asphalt oil calibration tank, a 200-gallon heating oil tank, and miscellaneous 55 -gallon drums . The 30,000-gallon asphalt oil tanks are filled through a pipe located on the north side of the secondary containment structure, and the 1,000-gallon asphalt oil calibration tank is filled through a pipe located on the east side of the secondary containment structure . The asphalt oil calibration tank is normally kept empty, except when in use for Caltrans mix verification . Once the asphalt oil transfer truck is attached to the asphalt oil tank' s fill pipe, the transfer truck or hot plant operator switches a valve to open the transfer line to the proper tank, then the transfer truck operator uses a toggle switch at the fill stand to select the appropriate tank and will begin the asphalt oil transfer. The 30, 000-gallon asphalt oil tanks are equipped with liquid level indicators, high level shutoff safety valves, and overfill overflow pipes; the overflow pipes extend through the secondary containment wall to a bermed containment area . A visual alarm will be triggered in the control tower in the event that the asphalt oil is filled near the tank' s capacity . The asphalt oil is conveyed from the tanks to the drum/dryer during production . The asphalt oil, which must be heated to approximately 300° F in order to flow, will solidify at ambient temperature and pressure . Therefore, spillage of asphalt oil to the ground surface will typically pool and solidify in the immediate vicinity of the spill The heating oil reservoir and miscellaneous 55 -gallon drums of oil are maintained within the same concrete secondary containment structure . The heating oil circulates through internal coils in the asphalt oil tanks, and the heating oil reservoir is filled as needed . Transfer activities for the heating oil reservoir and 55 -gallon drums are conducted within the secondary containment structure . The asphalt oil tanks are not regulated by APSA . Area D — Rock Plant Area D consists of several 55-gallon drums of miscellaneous oils located within three ( 3 ) concrete secondary containment structures . Oil from the drums is transferred by hand in small volumes and the drums are 13