2021-12-07_REVISION - M2012032 (16)

Home Browse Search

CUM SILVER MINES 4.2.6 Inspections and Tests (40 CFR 112.8(c)(6)) Visual inspections of AST's by facility personnel are conducted according to the procedure described in this Plan. Required maintenance noted during inspections is conducted promptly. The scope and schedule of certified inspections and tests conducted on the facility's AST's are specified in STI Standard SP-001. The external inspection includes ultrasonic testing of the shell, as specified in the standard or if recommended by the certified tank inspector, to assess the integrity of the tank for continued oil storage. Recommendations for integrity testing are based on: • Knowledge of the tank history; • The fact that all tanks are shop constructed; • Past tank performance; • The visible condition of the tank; and • The quality and volume of secondary containment. Inspections are signed by the inspector. Inspections and certified inspections and tests are filed in a central location and maintained for at least 5 years. Table 4.2 summarizes inspections and tests to be conducted on bulk storage containers. An environmentally equivalent measure is implemented in place of the external inspection as per STI Standard SP-001. Table 4.2 Scope and Frequency of Inspections and Tests Inspection/Test C-1 C-3 C-5 C-8 Visual inspection by facility personnel Monthly Monthly Monthly Monthly Per Section 3.7 Annual Annual Annual Annual External inspection by certified inspector * EE NA NA NA l Per STI Standard SP-001 Internal inspection by certified inspector ** March NA NA NA Per STI Standard SP-001 2027 _ EE Refer to Table 4.3. Not required until 2027 given use of environmentally equivalent measure. * Internal inspection may be recommended based on findings of the external inspection. ** or earlier, as recommended by certified inspector. Spill Prevention Control and Countermeasure Plan 23 1 P a g e