Oklahoma City Community College (OCCC) has scheduled the last CNG and LPG classes and exams for 2016.  Below is a schedule of upcoming classes and exam dates. Click here to register. CNG Equipment Technician Certification Class 11/07 – 11/11/2016 (Evening Class) 12/7 – 12/09/2016 (Daytime Class) CNG Compressor Level 1 Operator Certification 11/02 – 11/04/2016 […]