Babylon's soil is sand under a thin coat of good intentions, and the bay breeze pulls the moisture out of it all July. Claiborne Associates Inc. works with that rather than against it — mowing on a steady cycle, feeding turf that has to earn its color, edging and clearing up as the season turns. Late in the afternoon the wind shifts onshore and the whole town smells faintly of salt and cut grass. A lawn that holds its green through August on this coast is a small argument won. That is the part worth doing carefully.