Volunteers will clean up trash on San Jose Island this Saturday in a major effort organized by the local Surfrider Foundation and the Mission-Aransas National Estuarine Research Reserve (NERR).The May 9 cleanup will target heavy trash buildup near the island's jetty, where ocean currents wash up plastic bottles and other debris.Massive Debris Collection ExpectedLast year's cleanup yielded impressive but sobering results: volunteers collected 1,5…