NSPF® CPO® Class – PA Pesticide Renewal Credits Holiday Inn, Downtown Johnstown, PA. March 21 & 22, 2017. 814-266-2236. Registration cutoff 6 PM today (March 3, 2017). NSPF® CPO® Class PA Pesticide Recertification Credits – March 22, 2017. 6 Core & 4 Category 24 (Swimming Pools) 814-266-2236. Post Views: 599