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PMMq bow integrity testing required under 40 CFR 112.8(c)(6), since it provides an appropriate and effective means of assessing the condition of the tank and its suitability for continued service. These procedures are in conformance with SP001 and provide an equivalent environmental protection to prevent a discharge, as described in 40 CFR 112.1(b). 17.2.7 Internal Heating Coils — §112.8(c)(7) There are no internal heating coils installed at the Facility. Therefore, this section is not applicable. 17.2.8 Fail-Safe Engineering — §112.8(c)(8) The possibility of a significant discharge is reduced by use of one or more of the following equipment/procedures: • Direct visual gauges are installed on all tanks where possible. These gauges are inspected once per month during the operating season. • The two used oil storage tanks are equipped with electronic high level alarms. Tanks A, B, and F do not have electronic high level alarms. • The physical presence by trained Facility employees who have manual control over all movements of oil products. • Tanks are located such that they are within close view of the operations conducted at the Facility. • Procedures for filling tanks are detailed in writing and conveyed by formal training and regular review programs for employees. This entails having a person gauge the tank prior to starting the transfer to verify that the tank has adequate capacity to hold the material being transferred. Employees also perform regular inspections of the transfer equipment(tanks, pumps, piping, etc.)throughout the transfer. The liquid levels within the diesel fuel ASTs are visually monitored during transfer operations through the fill ports associated with each tank in order to prevent an accidental release. Venting capacity is suitable for the anticipated fill and withdrawal rates. The liquid levels within the drums, totes, and oil section of the oil/water sump are also monitored visually during transfer operations. The facility installed a high-level alarm to provide overfill protection for each of the two (2) 1,000- gallon used oil tanks as required in 40 CFR 112.8(c)(8)and the California Hazardous Waste Regulations. Tank gauges are present on storage tanks and are used to visually monitor liquid levels during transfers. They are regularly inspected for accuracy. This inspection can be accomplished by several methods. Inventory verification and manual handline calibrations are common methods used to check the accuracy of the gauge. Tank gauges are visually examined when a tank is emptied to verify that the gauge is functional and properly calibrated. If it is determined that the gauge is not accurate either by manual gauging, or visual examination, the gauge will be calibrated prior to filling the tank. GHD I Spill Prevention, Control,and Countermeasure(SPCC)Plan 111189093(1)1 Page 11