CORROSION Protection

1. To insert your business’ logo on this slide • From the Insert Menu, • Select “Picture” • Locate your logo file, click OK • To resize the logo • Click anywhere inside the logo. • The boxes that appear outside the logo are known as “resize handles”. Use these to resize the object. If you hold down the shift key before using the resize handles, you will maintain the proportions of the object. CORROSION Protection Alaska Spring 2004

2. Goals • Ensure tank and piping are safe from corrosion • Only applies to the portion of the UST system that routinely contains product. Tank and product piping only.

3. First step for Operator • Figure out the construction material • Tank • Piping • Figure out cathodic protection option • Fiberglass or non-metallic • Galvanic • Impressed current

4. If non-metallic • Confirm through documentation for inspector. • That’s it.

5. If Galvanic • Provide inspector with any previous test results – Look for them in your previous inspection report. • Have a cathodic protection test done if more than 3 years since last test. • Keep track of test results • So long as there is enough cathodic protection, nothing more to do

6. Impressed Current Rectifier

7. If Impressed Current • Find your 60 day rectifier log or start one. • Provide inspector with any previous test results and 60 day rectifier log. • Have a cathodic protection test done if more than 3 years since last test or as recommended by a Corrosion Expert. • Have rectifier checked and serviced, as needed. • Keep track of test records

8. Tank lining • Not common • No further testing so long as cathodic protection present and maintained • Studies of liner failures are starting to come in.