Storms in Brockton usually arrive after the last car has gone quiet on Belmont Street. ASAP Lynn Snow Removal keeps the odd hours a snowfall demands — out at eleven, out again at three, back at six so the morning finds pavement instead of a problem. Plowing, shoveling and the slow work around mailboxes and fenced corners all happen while the city sleeps under it. The name says what the work is about: getting there fast, and getting back when the wind fills a driveway in again. At daylight the only evidence is a clean apron of blacktop and a tidy bank at its edge.