The developer of a yeshiva with adult-student housing has been issued a violation for using a construction trailer for a pre-school program. Mosdos Chofetz Chaim is due in Ramapo Justice Court on March 20 to answer charges that the trailer had been occupied by children without a certificate of occupancy.”We’re not going to permit a school to operate in the middle of a construction site,” Town Attorney Michael Klein said yesterday. Ramapo inspectors saw children in the trailer Feb. 17. The violation was issued Feb. 22. Dennis Lynch, a Nyack attorney representing Mosdos Chofetz Chaim, declined to discuss it. “These are mere allegations,” Lynch said, “and it would be inappropriate to discuss a matter yet to be adjudicated.” The trailer was installed early this month when workers demolished 11 houses on the property….the site on Grandview Avenue, a quarter mile west of New Hempstead Road, is one of four locations for adult-student housing in Ramapo, a controversial addition to the town’s master plan for development……The town’s planning and zoning boards approved the project in 2004. Besides a yeshiva, there will be 28 four-bedroom and 32 two-bedroom apartments. In addition to the charges of improperly using the trailer as a school, the project has also drawn objections from the county. Yesterday, Rockland Commissioner of Highways Charles Vezzetti dispatched an inspector to ensure that workers were complying to a county demand to halt work in the road’s right-of-way…