Section 551. Block 1, Lot 4; thence generally eastward along the southerly boundary of the Warbler Woods parcel and an extension of that southerly boundary due eastward to the Town of Brookhaven parcel known as the Longwood Greenbelt and identified as District 200, Section 583, Block 2, Lot 1

1; thence southward along the westerly boundary of the
  Longwood Greenbelt parcel to the Long Island Expressway; thence westward
  along  the  northerly  boundary  of  the  Long Island Expressway to Main
  Street in Yaphank; thence westward along the southerly boundary of  Main
  Street  in  Yaphank  to  the westernmost extent along Main Street of the
  Southaven County Park boundary; thence  generally  southward  along  the
  westerly  boundary  of  Southaven  County Park, crossing the Long Island
  Rail Road tracks and Park Street, to Gerard Road; thence southward along
  the easterly boundary of Gerard Road to Victory Avenue; thence  eastward
  along the northerly boundary of Victory Avenue to a point where the west
  bank  of  the  Carmans  River  passes under Victory Avenue and Route 27;
  thence south under Route 27 to the lands  owned  by  the  United  States
  known  as  Wertheim  National  Wildlife  Refuge  (the  "Refuge"); thence
  generally westerly and southerly to the waters of Bellport  Bay;  thence
  generally  easterly  across  the  Bay  and  northerly along the easterly
  boundary of the Refuge, including all lands currently part of the Refuge
  and any lands which may  become  part  of  the  Refuge  in  the  future;
  excluding  however any private property or rights thereof which may fall
  within the Refuge assemblage; continuing northerly to  the  point  where
  the  eastern  boundary  of  the Carmans River travels under Route 27 and
  Victory Avenue to the  southerly  boundary  of  Southaven  County  Park;
  continuing  easterly  along  the  southerly boundary of Southaven County
  Park; thence eastward along the northerly boundary of Victory Avenue  to
  River  Road; thence northward along the westerly boundary of River Road,
  crossing  the  Long  Island  Rail  Road  tracks,  to  the  Long   Island
  Expressway;  thence  eastward  along  the northerly boundary of the Long
  Island Expressway to the Longwood Greenbelt property;  thence  northward
  along  the  easterly boundary of the Longwood Greenbelt property to that
  point along the easterly boundary which is due east of the  southernmost
  extent  of  the  developed area containing the sewage treatment facility
  known as the Dorade facility; thence generally westward to the  easterly
  boundary of the parcel identified as District 200, Section 504, Block 1,
  Lot  7.2; thence northward along the easterly boundary of that parcel to
  Longwood Road; thence eastward along the northerly side of Longwood Road
  to County Route 46; thence northward along the westerly side  of  County
  Route  46 to a point 2000 (two thousand) feet south of the southern bank
  of the Peconic River crossing  of  County  Route  46;  thence  generally
  southeastward  along  a  line  parallel to, and 2000 (two thousand) feet
  generally south or southwest of, and parallel to, the southernmost  bank
  of  the  Peconic  River  to  a point where the Peconic River crosses the
  unpaved, unnamed, north-south firebreak and patrol road on  the  eastern
  half  of  the  Brookhaven National Laboratory property; thence southward
  and southwestward along the easterly and southeasterly boundaries of the
  unpaved, unnamed, north-south firebreak and patrol road starting on  the
  eastern  half  of  the  Brookhaven  National  Laboratory property to the
  Brookhaven National Laboratory road known as Brookhaven  Avenue;  thence
  due westward along a straight line to the Brookhaven National Laboratory
  road  known  as  Princeton  Avenue;  thence westward along the southerly
  boundary of Princeton  Avenue  to  the  unnamed  Laboratory  road  which
  diverts  southwest  in the vicinity of the Laboratory gate house; thence
  southwestward along the southerly side of the  unnamed  Laboratory  road
  just  described  to County Route 46; thence southward along the easterly
  side of County Route 46 to NYS Route  495;  thence  eastward  along  the
  northerly  boundary  of  NYS  Route  495  to  County  Route  111; thence
  southeastward along the northerly boundary of County Route  111  to  NYS
  Route  27 (Sunrise Highway); thence generally southward across NYS Route
  27 to the westernmost extent along  NYS  Route  27  of  the  undeveloped

  portion (as of June 1, 1993) of the parcel assemblage comprised of those
  parcels  identified  as  District  200,  Section 594, Block 2, Lot 4 and
  District 900, Section 325, Block 1, Lot 41.2; thence southward along the
  westerly  boundary  of  the  undeveloped portion (as of June 1, 1993) of
  that parcel assemblage to County Route 71  (Old  Country  Road);  thence
  eastward  along  the  northerly  boundary  of  County  Route  71  to the
  southeastern corner of the Suffolk County Nature  Preserve  lands  which
  run  from  NYS  Route  27 south to County Route 111 and which adjoin the
  easterly side of the preceding assemblage; thence  northward  along  the
  easterly  boundary  of  that  Suffolk  County Nature Preserve assemblage
  (crossing the County Route 111 right of way) to  NYS  Route  27;  thence
  eastward  along  the  southerly boundary of NYS Route 27 to the westerly
  end of 19th Street as shown in the old filed map  contained  within  the
  tax  map  identified  as  District  900,  Section  276,  Block 2; thence
  southward along the westerly boundary of that old filed  map  (shown  in
  District  900,  Sections  276,  302, 303, 327, and 328), and coterminous
  with the westerly side of those  parcels  along  the  westerly  side  of
  Oishei  Road,  to  County  Route 71; thence eastward along the northerly
  boundary of County Route 71 to the southeasterly corner  of  the  parcel
  identified  as  District  900,  Section  328,  Block  2,  Lot 19; thence
  northward along the easterly boundary of that old filed map  surrounding
  Oishei  Road,  and  coterminous  with the easterly side of those parcels
  along the easterly side of Oishei Road, to a point along that  line  due
  west  of  the  northwesterly corner of the parcel containing the Suffolk
  County facilities identified as District 900, Section 331, Block 1,  Lot
  1; thence due eastward along a straight line to the northwesterly corner
  of  that  parcel;  thence  eastward along the northerly boundary of that
  parcel to its northeasterly corner shown in District 900,  Section  307;
  thence  due  eastward  along a straight line to Summit Boulevard; thence
  southward along the westerly side of Summit Boulevard  to  County  Route
  71;  thence  eastward  along  the  northerly  side  of  County Route 71,
  excluding all parcels abutting that road which are developed as of  June
  1,  1993, to the Long Island Rail Road tracks; thence eastward along the
  northerly boundary of the Long Island Rail Road tracks to  County  Route
  31 (Old Riverhead Road); thence northward along the westerly boundary of
  County Route 31 to that point opposite the point along the easterly side
  of  County  Route 31 (north of the Stewart Avenue intersection) at which
  the undeveloped portion (as of June  1,  1993)  of  the  Suffolk  County
  Airport  (Gabreski Airport) occurs; thence generally northward, eastward
  and southward around the westerly, northerly and easterly boundaries  of
  the  undeveloped  portion  (as  of June 1, 1993) of the airport property
  (excluding from the Core Preservation Area those portions of the airport
  property which are occupied by the runways, their associated maintenance
  areas, and those areas identified for future use in the  Suffolk  County
  Airport  Master  Plan  approved  by  the County Legislature) to the Long
  Island Rail Road tracks (including in the Core Preservation  Area  those
  portions  of  the  airport  property  which  are  adjacent to the Quogue
  Wildlife Refuge's westerly boundary  and  which  are  in  their  natural
  state);  thence eastward along the northerly boundary of the Long Island
  Rail Road tracks to the southeasterly corner of the Town of  Southampton
  parcel  identified as District 902, Section 1, Block 1, Lot 22.1; thence
  generally northward and eastward  along  the  easterly  border  of  that
  parcel  and  the  Town  of  Southampton  parcels  to the immediate north
  identified as District 900, Section 313, Block 1, Lot 42.1 and  District