necessary to more fully determine if any problems exist at other levels of tank operation). b) Measure and record annular space at 30-ft spacing (minimum of n/a four quadrants) around roof and record. Measurements should be taken in directly opposite pairs. 1) Opposite pair 1. n/a 2) Opposite pair 2. c) Check if seal fabric on primary shoe seals is pulling shoes away n/a from shell (fabric not wide enough). d) Inspect fabric for deterioration, holes, tears, and cracks. n/a e) Inspect visible metallic parts for corrosion and wear. n/a f) Inspect for openings in seals that would permit vapor emissions. n/a g) Inspect for protruding bolt or rivet heads against the shell. n/a h) Pull both primary and secondary seal systems back all around the n/a shell to check their operation. i) Inspect secondary seals for signs of buckling or indications that n/a their angle with the shell is too shallow. j) Inspect wedge-type wiper seals for flexibility, resilience, cracks, and n/a tears. C.1.5 Roof Appurtenances C.1.5.1 Sample Hatch a) Inspect condition and functioning of sample hatch cover. n/a b) On tanks governed by Air Quality Monitoring District rules, check n/a for the condition of seal inside hatch cover. c) Check for corrosion and plugging on thief and gauge hatch cover. n/a d) Where sample hatch is used to reel gauge stock level, check n/a for marker and tab stating hold-off distance. e) Check for reinforcing pad where sample hatch pipe penetrates the n/a roof deck. f) On floating roof sample hatch and recoil systems, inspect n/a operation of recoil reel and condition of rope. g) Test operation of system. n/a h) On ultra clean stocks such as JP4, check for presence and n/a condition of protective coating or liner inside sample hatch (preventing rust from pipe getting into sample). C.1.5.2 Gauge Well
necessary to more fully determine if any problems exist at other levels of tank operation). b) Measure and record annular space at 30-ft spacing (minimum of four quadrants) around roof and record. Measurements should be taken in directly opposite pairs. n/a 1) Opposite pair 1. 2) Opposite pair 2. n/a c) Check if seal fabric on primary shoe seals is pulling shoes away from shell (fabric not wide enough). n/a d) Inspect fabric for deterioration, holes, tears, and cracks. n/a e) Inspect visible metallic parts for corrosion and wear. n/a f) Inspect for openings in seals that would permit vapor emissions. n/a g) Inspect for protruding bolt or rivet heads against the shell. n/a h) Pull both primary and secondary seal systems back all around the shell to check their operation. n/a i) Inspect secondary seals for signs of buckling or indications that their angle with the shell is too shallow. n/a j) Inspect wedge-type wiper seals for flexibility, resilience, cracks, and tears. n/a C.1.5 Roof Appurtenances C.1.5.1 Sample Hatch a) Inspect condition and functioning of sample hatch cover. n/a b) On tanks governed by Air Quality Monitoring District rules, check for the condition of seal inside hatch cover. n/a c) Check for corrosion and plugging on thief and gauge hatch cover. n/a d) Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold-off distance. n/a e) Check for reinforcing pad where sample hatch pipe penetrates the roof deck. n/a f) On floating roof sample hatch and recoil systems, inspect operation of recoil reel and condition of rope. n/a g) Test operation of system. n/a h) On ultra clean stocks such as JP4, check for presence and condition of protective coating or liner inside sample hatch (preventing rust from pipe getting into sample). n/a C.1.5.2 Gauge Well
Tank-In-service-Inspection-Checklist.docx