Specifications include, but are not limited to: 1. Work to be performed at the request of authorized NBH personnel. 2. Contractor must be able to respond within 1 hour of being informed. 3. Contractor must sign in and out at NBH switchboard, logging services performed for each occurrence on checklist of services performed. 4. Amount of salt and or calcium spread shall follow industry standards and acceptable to agency. NBH can supply up to 50% of salt and/or calcium to reduce travel and expense to NBH. 5. An occurrence happens every time 1” of snow falls or any ice accumulation. 6. Under normal circumstances NBH will need serviced before 1” of snow has accumulated. 7. Under normal circumstances all snow and ice must be addressed before 6:30am.