>From owner-tweeters at u.washington.edu Fri Jul 21 12:03:20 1995
> Most of the lead in the water column in Puget
>Sound is particulate and ends up in the sediment where it is largely
>unavailable to organisms.
>Herb Curl


Herb,
Are you saying "unavailable" metabolically, or simply (primarily) physically?
Also, to which "organisms" (e.g., to bottom/ooze-dwelling invertebrates,
microbes, or ...?
Peter