The spit-and-tape fence at the toxic Gowanus Whole Foods site took a hit during last weekend’s windstorm. A week later, it’s still down, although someone has thoughtfully added yellow “caution” tape to the wreckage. The good news is that no one even has to duck in order to go for a walk on the polluted site. (It may be one of the most photographed, wide-open construction sites in Brooklyn at this point.) On other fronts: it would seem that the clock is rapidly ticking down on any possible 2009 opening for a supermarket, given that permits aren’t in place, key state approvals are lacking and the site remains abandoned.