February is the month Boonton gets tested: a warm afternoon, a hard freeze at dusk, and by morning every lot and walk wears a skin of ice. On-Line Contracting Inc works those hours — plowing lots and driveways, stacking the piles where they will not block sight lines, clearing entries and walkways by hand, and salting ahead of the refreeze. Snow that falls overnight has to be gone before the day begins here, which means being out in it while the town is still dark. There is a quiet pride in an empty lot swept down to black asphalt at six in the morning. That is the entire job, and it is worth doing exactly right.