Battery Park City RegattaWell, this is kind of surprising. Last week’s post on the continued use — and impending legislation to curtail said use — of mega-nasty heating sludge Number Six heating oil pinpointed upper Manhattan and the South Bronx as the neighborhoods in which ol’ Number Six was most commonly used. And while that’s still true, the Downtown Express reports that six buildings in Battery Park City, Manhattan’s most ostentatiously green residential neighborhood, are using Number Four or Number Six oil to heat their buildings. This isn’t in violation of BPC’s vaunted green building code (and isn’t mentioned in LEED’s guidelines, either), mostly because it seems like no one really thought about it until recently. Presumably, that’s going to be changing soon.