Specifications include, but are not limited to: Selected contractors will be responsible for: • Maintaining accurate records of the quantities of materials chipped, by type, and cooperating with the Air District in any audit or investigations of such quantities; • Communicating to the Air District within 24 hours of discovery of any constraints or limitations that will prevent contractor from completing one or more projects; • Bringing tub grinding and grapple truck projects to the Air District's attention to receive approval of total bid price prior to commencing with the project; • Providing all tools, equipment, supplies, transportation, labor, and supervision necessary to perform the chipping services required to complete each project; • Performing all work in a thorough, safe and professional manner so that the Programs’ participants are provided reliable, courteous and high-quality chipping services at all times; • Prohibiting contractor and its employees from soliciting or accepting any additional compensation or gratuity for services provided under the contract;