The 5:40 out of Saint James does not wait for anybody, which is why the snow work here happens in the dark. Parkridge Landscaping Inc. is out ahead of the platform lights, plowing driveways and shoveling walks on the streets that feed the station, salting the slick spots so the walk to the car is not an adventure. Come April the schedule flips and it is mowing, edging and trimming, week after week, with cleanups at either end. Long Island summers push grass hard and the Sound keeps everything damp, so the routes stay full from the first warm rain to the first hard frost. The measure of the job is a homeowner who never has to think about it.