Question: Brooklyn Community Board 1 is delimited by  3.5 mi long tributary containing an estimated how many USgal of spilled oil?

full_context: Document 1: Brooklyn Community Board 16: Brooklyn Community Board 16 is a New York City community board that encompasses the Brooklyn neighborhoods of Brownsville and Ocean Hill. It is delimited by East 98th street, East New York Avenue, Ralph Avenue, Atlantic Avenue and Saratoga Avenue on the west, Broadway on the north, Van Sinderen Avenue on the east, as well as by the Long Island Rail Road on the south.
Document 2: Newtown Creek: Newtown Creek, a 3.5 mi long tributary of the East River, is an estuary that forms part of the border between the boroughs of Brooklyn and Queens, in New York City. 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.
Document 3: Brooklyn Community Board 2: Brooklyn Community Board 2 is a New York City community board that encompasses the Brooklyn neighborhoods of Downtown Brooklyn, Brooklyn Heights, DUMBO, Vinegar Hill, Fulton Mall, Boerum Hill, Fort Greene, Brooklyn Navy Yard, Fulton Ferry, and Clinton Hill. It is delimited by East River on the west and the north, by Kent and Classon Avenues on the east, and by Atlantic Avenue, Pacific Street, Fourth Avenue, Warren and Court Streets on the south.
Document 4: Brooklyn Community Board 18: Brooklyn Community Board 18 is a New York City community board that encompasses the Brooklyn neighborhoods of Canarsie, Bergen Beach, Mill Basin, Flatlands, Marine Park, Georgetown, and Mill Island. It is delimited by Nostrand Avenue on the west, the Long Island Rail Road on the north, Van Sinderen Avenue and Louisiana Avenue on the east, as well as by Shore Parkway on the south.
Document 5: Brooklyn Community Board 1: Brooklyn Community Board 1 is a New York City community board that encompasses the Brooklyn neighborhoods of Williamsburg and Greenpoint. It is delimited by the Newtown Creek and Queens Borough line on the east, Flushing and Kent Avenue on the south, and by the East River on the west.
Document 6: East River: The East River is a salt water tidal estuary in New York City. The waterway, which is actually not a river despite its name, connects Upper New York Bay on its south end to Long Island Sound on its north end. It separates the borough of Queens on Long Island from the Bronx on the North American mainland, and also divides Manhattan from Queens and Brooklyn, which is also on Long Island. Because of its connection to Long Island Sound, it was once also known as the "Sound River". The tidal strait changes its direction of flow frequently, and is subject to strong fluctuations in its current, which are accentuated by its narrowness and variety of depths. The waterway is navigable for its entire length of 16 mi , and was historically the center of maritime activities in the city, although that is no longer the case.
Document 7: Queens Community Board 1: The Queens Community Board 1 is a local advisory group in New York City, encompassing the neighborhoods of Astoria, Long Island City, Queensbridge, Ditmars, Ravenswood, Steinway, Garden Bay, and Woodside, in the Borough of Queens. It also includes Rikers Island, the citywide correctional complex, which is within the Borough of the Bronx but connected by its only bridge to Astoria. The Board's district is delimited by the East River on both west and north, by the Brooklyn-Queens Expressway on the east, and by Northern Boulevard, the Long Island Rail Road and Bridge Plaza North on the south.
Document 8: Brooklyn Community Board 10: Brooklyn Community Board 10 is a New York City community board that encompasses the Brooklyn neighborhoods of Bay Ridge, Dyker Heights, and Fort Hamilton. It is delimited by Upper New York Bay on the west, Bay Ridge R.R. Yards and Long Island Rail Road on the north, 14th Avenue and Bay 8th Street on the east, as well as by Lower New York Bay on the south.
Document 9: Spring Creek, Brooklyn: Spring Creek, previously called Spring Creek Basin, is a neighborhood within the East New York section of Brooklyn in New York City. Part of Brooklyn Community Board 5, it roughly comprises the southern portions of East New York between Flatlands Avenue to the north, and Jamaica Bay and the Gateway National Recreation Area to the south, with the Brooklyn neighborhood of Canarsie to the west and the Queens neighborhood of Howard Beach to the east. It is named after Spring Creek, one of several creeks that formerly ran through the area and drained into Jamaica Bay.
Document 10: Gowanus Canal: The Gowanus Canal is a canal in the New York City borough of Brooklyn, on the westernmost portion of Long Island. Connected to Gowanus Bay in Upper New York Bay, the canal borders the neighborhoods of Red Hook, Carroll Gardens, and Gowanus, all within South Brooklyn, to the west; Park Slope to the east; Boerum Hill and Cobble Hill to the north; and Sunset Park to the south. It is 1.8 mi long. There are seven bridges over the canal, carrying Union Street, Carroll Street (a landmark), Third Street, Ninth Street, Hamilton Avenue, the Gowanus Expressway, and the IND Culver Line of the New York City Subway.
Document 11: Gowanus Canal Conservancy: The Gowanus Canal Conservancy is a nonprofit conservancy founded in 2009 that serves as a community-based environmental steward of the Gowanus Canal. Partnering with the EPA, the city Department of Environmental Protection (NYCDEP), groups like Riverkeeper and universities as diverse as Brooklyn Law School, SUNY Environmental Science and Forestry at Syracuse, and Rutgers, it seeks to improve the canal's water quality while promoting local green spaces and building habitats for the fauna that live in or near the waterway.
Document 12: New Creek (Staten Island): The New Creek watershed encompasses 2220 acre on the East Shore of Staten Island, New York. The creek is fed by many natural springs in the area, which were used by the Lenape Indians before the arrival of European colonists in the Seventeenth Century. Many of the springs have been channeled underground by urban development as the population expanded throughout New York City. The watershed consists of marshland which supports a variety of flora and fauna. Spartina grass flourished in a tidal wetland before the restoration of the shore and beach area and the development of a shoreline urban park by the New York City Department of Parks and Recreation in the 1960s, blocking tidal flow to the area.
Document 13: Brooklyn Community Board 7: Brooklyn Community Board 7 is a New York City community board that encompasses the Brooklyn neighborhoods of Sunset Park, Windsor Terrace, Greenwood Heights and South Park Slope. It is delimited by Gowanus Bay on the west; by 15th Street and Prospect Park South West on the north; and by Caton Avenue, Fort Hamilton Parkway, 37th Street and 8th Avenue on the east, as well as by the Long Island Rail Road and Bay Ridge R.R. Yards on the south.
Document 14: Brooklyn Community Board 12: Brooklyn Community Board 12 is New York City community board that encompasses the Brooklyn neighborhoods of Borough Park, Kensington, Ocean Parkway, and Midwood. It is delimited by 61st Street on the west, 8th Avenue, 37th Street and Caton Avenue on the north, Coney Island Avenue, 18th Street, MacDonald Avenue and Long Island Rail Road on the east, as well as by Avenue P on the south.
Document 15: Flushing River: The Flushing River, more properly and historically known as Flushing Creek, is a waterway that flows through the northern part of central Queens in New York City (mostly through Flushing Meadows–Corona Park) and empties into the East River. The river runs through a valley that may have been a larger riverbed before the last Ice Age. In the 18th and 19th centuries, it divided the towns of Flushing on its right bank and Newtown on its left; today, it divides Queens into western and eastern halves.
ground_truth: 30000000