SOUTH PLAINFIELD, NJ -  The South Plainfield Clean Communities Advisory Board announced that a Borough-wide litter cleanup will be held on Saturday morning, April 16.  Volunteers may collect equipment and clean-up assignments at the municipal building at 2480 Plainfield Avenue from 9 to 10 a.m.   After clearing roadsides, parks, streams and vacant lots  of litter and trash during the morning, volunteers will be invited back to the municipal building at 12:00 for a Pizza Pickup Picnic, complete with environmentally-friendly door prizes.  You can organize a crew, or come on your own.  Call Alice Tempel, the Clean Communities Coordinator, at (908) 226-7621 for more information or email her at