Question: Brooklyn Community Board 1 is delimited by  3.5 mi long tributary containing an estimated how many USgal of spilled oil?
Sentence (from "Newtown Creek"): Channelization made it one of the most heavily used bodies of water in the Port of New York and New Jersey and thus one of the most polluted industrial sites in the US, containing years of discarded toxins, an estimated 30000000 USgal of spilled oil, including the Greenpoint oil spill, raw sewage from New York City’s sewer system, and other accumulation from a total of 1,491 sites.
Relevant evidence: Yes