UBOC does not have a large capital markets business which means they did not get heavily into derivatives or other messy products. They do not make markets in thousands of instruments at significant liquidity levels so I don’t believe they have the exposure, either propietary or counterparty.
They are primarily a wholesale and retail banking institituion, with a profitable trust and treasury business as far as I know. They have been an old school bank and continue to be fairly conservative as far as I know.
I would think they are a fine place to park your money compared to some of the other banks mentioned here.