is internal inspection required before impressed current system can be installed on the tank and piping system?
No. A functioning STI-P3 tank already meets the upgrade requirement. However, internal inspection would be a wise assessment to evaluate the tank prior to spending significant dollars adding impressed current. Impressed Current CP is proposed to be installed on 3 internally lined UST’s and the associated galvanized steel piping. The tanks were lined in 1983 and the lining determined to be acceptable upon internally inspection in 1993. Will an internal inspection be required in 1998 to install impressed current cathodic protection? The lined tanks referenced in the question were internally inspected at the 10 year interval and will require re-inspection at a 5 years interval. They are due for an internal inspection in 1998. (Refer to Comm 10.52 (2) (a) 1.& 2. & (b) 1. for tank lining internal inspection and cathodic protection upgrade requirements.) The tanks will require an internal inspection in accordance with Comm 10.52 (2) (a) 2., the pipe will require a current passing precision t
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