PORT JERVIS — Concerns about damage to Deerpark’s streams, roads and rural atmosphere brought about 400 people to Port Jervis High School on Wednesday night for the town Planning Board's public hearing on expansion plans for the 393-acre Dragon Springs Buddhist Inc. campus on Galley Hill Road.Most controversial are plans to build a 100,000-gallon-per-day sewage treatment plant to accommodate additional visitors and residents in proposed new buildings.