Nope. BNL is a ~30 minute drive from Islip. BNL is sandwiched between Ridge/Middle Island, Yaphank, and Shorham Wading River (10 minutes from where the aborted SWR nuclear power plant rests). BNL belongs to the township of Brookhaven.
Meanwhile, Islip is the home of McCarthur Airport, a medium sized airport that serves the east end of Long Island.
Maybe I've lost something in all the details, how is this list compiled?
I was born in DC and grew up in the area, as such I know a lot of current federal employees who should be on a 2012 list. I grepped for a handful of names of folks I know personally and so far found only one. (For privacy reasons I will not share the names of non-matches here.)
Update: Ok, I've found two now. Still many more non-matches than matches.
...obtained by Asbury Park Press via a FOIA. It doesn’t include FBI, CIA, Defense Department, or IRS employees, or employees involved in security work, nuclear materials or national security matters.
Location with highest average salary among stations with >25 federal employees:
Islip, NY - 496 employees
$43,162 min
$140,781 avg
$179,700 max