Picon Tank Inspection FW – 1 Tank 114 Sansome , SF

San Francisco Tank Inspection Photos and Guidance

Tank Inspector:

Chevan Goonetilleke, MS

• NACE Certified Coating Inspector-Level 3, Cert No.38388
• FiberglassTank & Pipe Institute, RP-2007 Inspector, Cert No.00089

Tank Inspection Equipment:

• Underwater Drone (ROV), Video,Camera
• Model#: Deep Trekker DTG3, Manufactured in 2022

Tank Inspection Date: July 22,2022

Contents:

• Flushing Water Pump
• Man-way access: top

Dimensions:

• Diameter = 6ft
• Height =8 ft

Observations:

• Blisters in liner
• Heavy rust in tank coming through pin holes in liner
• Ladder is very rusty, unsafe to use
• The level of rust is indicative of the ladder losing most of its thickness
• Mud @ bottom

Recommended Tank Repairs:

• Replace Tank Liner
  • Clean mud at bottom of tank, remove tank liner
  • Apply new tank liner
  • Cost ~ $ 22K
• Replace Tank Roof
  • New corrosion-resistant roof
  • recommend FRP (fiberglass) roof top
  • Cost ~ $16K

Inspection Video:

Overall – Tank liner should be replaced

Electro-galvanic corrosion of the ladder is an indication of the degradation of the steel wall that is no longer fully protected due to the creation of pin holes from degradation of the liner.

Blisters are present and must be removed with new tank liner. Pin holes are not visible but the heavy presence of rust coupled with some blisters indicates liner penetration via pin holes in the liner.

Rust is so heavy that it comes through the liner

Liner is degrading and discoloring – liner needs to be replaced

Liner is degrading and discoloring–liner needs to be replaced

Heavy level of rust on the upper part of the tank

Ceiling–Heavy Rus5–Replace the top with a corrosion-resistant (eg. Fiberglass / FRP ) roof

Floor–has heavy levels of mud

Floor–has heavy levels of mud and scraps

Liner is degrading and discoloring–liner needs to be replaced