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QJR4Y SILVER MMES <br /> Test reports will be filed in a central location. Results of the testing will determine either if <br /> tanks are placed out of service or a new test period will be established. <br /> Table 4.3 Rationale For PE Determination of Tank Shell Testing Per <br /> STI SP-001 <br /> By B. Briggs CO <br /> 31956 Date May 2021 <br /> Container C-1 C-3 CA C-5 C-6 C-7 C-8 <br /> 10,000& Multiple tanks <br /> Capacity(gal) 1000 55 55 500 55 55 9,200&smaller <br /> Contents Diesel Oil/Lubricant Used Oil Diesel Oil/Lubricant Oil/Lubricant Mill Chemicals <br /> Shop constructed? Yes Drum Drum Yes Drum Drum Yes <br /> Year placed in not <br /> service 2012 not refilled refilled 2012 not refilled not refilled 2021 <br /> Years in service 6 N/A N/A 6 N/A N/A 0 <br /> Past leaks or other <br /> problems No No No No No No No <br /> All sides visible? Yes Yes Yes Yes Yes Yes Yes <br /> Visual Condition Excellent Excellent Excellent Excellent Excellent Excellent Excellent <br /> Building <br /> Secondary double spill Containment <br /> Containment wall spill pallet pallet none spill pallet spill pallet 220% <br /> Volume 110% 110% 110% 110% 110% <br /> Leak Detection Yes No No No No No No <br /> Visual Inspection Monthly Monthly Monthly Monthly Monthly Monthly Monthly <br /> Mar Mar <br /> Required Shell Test 2027 N/A I N/A 2027 N/A N/A N/A <br /> 4.2.7 Heating Coils(40 CFR 112.8(c)(7)) <br /> No permanent heating coils exist on any tank at this site. Several 55 gallon drum element <br /> heaters are present on site and used as needed. <br /> 4.2.8 Overfill Prevention Systems (40 CFR 112.8(c)(8)) <br /> Secondary containment is provided in the event of overfills. Storage drums are not refilled with <br /> new product and therefore overfill prevention systems do not apply. <br /> Spill Prevention Control and Countermeasure Plan 24 1 P a g e <br />