A clean slate August 21, 2015 Editorial Staff Photo by Jason Kaplan Custodians Benji Santiago and Rich Palkovic scrub the floor of the Cornwall-on-Hudson Elementary School lobby in preparation of the Sept. 2 opening of school. An emulsifier was used to clean the stone and the wet-dry vacuum picked up the excess water. Photo by Jason KaplanCustodians Benji Santiago and Rich Palkovic scrub the floor of the Cornwall-on-Hudson Elementary School lobby in preparation of the Sept. 2 opening of school. An emulsifier was used to clean the stone and the wet-dry vacuum picked up the excess water.