| 摘要 |
A sump containment apparatus for a fuel storage tank has a manhole skirt communicating with a sump interior, a bladder seal with a first portion secured in sealing engagement about an opening in the sump, and a second portion disposed about an inner surface of the manhole skirt and urged into sealing engagement with the inner surface by mechanical compression, preferably by an expansion ring. An observation port in a manhole cove is openable for viewing into the sump.
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