The following is a conversation between a Washington state regulator and Cal Chapman about corrosion protection for underground fiberglass tanks.
CP testing of Fiberglass Underground Storage Tanks – a Washington State regulator in field, asking for help in data interpretation:
I'm baffled here folks. I was inspecting an UST yesterday and found they were behind on CP testing. I opened the sump and found what appeared to be an Owens Corning fiberglass UST. The last test was good. I tested for continuity and protection. All meet criteria. Has anyone tested a fiberglass tank and got acceptable CP results? What is the cause of this? Most likely there is a metal strike plate inside the tank, which is where I made contact. Thanks.Read More