Remove all designated vehicles in such a manner as shall be approved by the City. Time being of the essence in this Contract, Contractor hereby specifically agrees that they shall dispatch a tow vehicle immediately and said vehicle shall commence removal as hereinafter provided within thirty (30) minutes of notification by the City. The thirty-minute provision will begin when the Contractor is notified and will end when the Contractor’s tow vehicle arrives on the removal scene. Failure to meet this condition, under normal weather conditions, will result in a penalty assessment as follows: arrival times ranging from 31 to 40 minutes will be assessed a $10 penalty. Arrival times ranging from 41 to 60 minutes will result in an additional penalty assessment of $40. Arrival times over 61 minutes will be assessed an additional $1 per minute. Such assessment will be deducted from the respective month’s end payment for towing services. Tow arrival times will be determined utilizing the Omaha Police Department Tow Logs maintained by the Police Technical and Reporting Services, Records Unit, Data Center. Disputes must be directed, in writing, to the Manager of the Vehicle Impound Facility of the Omaha Police Department. Under abnormal weather conditions the penalties will not be assessed. Abnormal weather conditions are defined as conditions prohibiting the normal flow of traffic due to ice and snowy roads and/or extreme precipitation limiting visibility to unsafe conditions prompting school closures and/or business closures, and OPD not responding to minor traffic accidents. The Impound Lot manager will determine the date/time to resume normal weather towing conditions. All tow trucks shall be equipped with a pan and scoop shovel, broom, and receptacle for debris, a minimum ten-pound dry powder fire extinguisher, and a container filled with 50 pounds of sand. The Contractor agrees to remove from the street all vehicle parts, glass, metal, dirt and debris, and to spread sand on all oil, gasoline or grease spots which are upon such streets at the scene of an accident or collision to which the Contractor has been directed to remove a vehicle or vehicles. Removal of said debris will be at no additional cost to the City of Omaha. Trucks must be equipped with auxiliary lights to attach to vehicles being towed. Tow trucks must be minimally equipped with a power winch, ten-pound dry powder fire extinguisher, motorcycle sling, an air tank for inflating tires, functional warning lights and the approved modern safety devices needed to remove a minimum of 10 vehicles per day.