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a. Whenever larger tree sections are being cut in a treetop, which may endanger persons or property, such sections shall be secured by ropes and lowered safely to the ground in a controlled manner. b. All fire hydrants, meter vaults, water and gas shut off valves, backflow devices, irrigation field controllers and similar facilities must remain accessible during the course of work. c. Noise levels, resulting from tree work operations, must be kept to a minimum at all times. All tree work operations are subject to compliance with all local Noise Restrictions. Operation of tree work equipment shall not take place between the hours of 9:00 p.m. and 7:00 a.m. weekdays, or between 9:00 pm and 8:00 am on weekends (Saturday and Sunday). Emergencies are exempt from any time restrictions. d. All tree work done to SAPRF trees must comply with all tree related safety requirements as stated in the safety standards ANSI Z133.1 -1994 of the American National Standards Institute, Inc. 1430 Broadway, New York, NY 10018. 1.13 SITE CLEANUP Cleanup of any debris resulting from any tree pruning operations shall be promptly and properly accomplished. The work area shall be kept safe at all times until all operations are completed. Under no circumstances shall the accumulation of debris be allowed in such a manner as to result in a hazard to the public. All debris from tree operations shall be cleaned up each day before the work crew leaves the site, unless permission is given by an authorized SAPRF representative to do otherwise. All lawn areas, parkways, streets and sidewalks shall be raked and /or blown clean, and all brush, branches, or other debris shall be removed from the site. Areas are to be left in a condition equal to or better than that which existed prior to the commencement of tree pruning operations. All cuttings, branches, wood chips and other debris shall be cleared from the site and disposed of by the Contractor. The Contractor shall obtain permits required for this purpose. Disposal expenses will be the Contractor's responsibility. Debris, such as wood chips, shall be left on property only at the direct and specific request of the owner and an authorized SAPRF representative. Firewood four (4) inches diameter or larger will be left at the work location in a safe manner, unless the wood is not usable as firewood. All firewood to be removed (wood four (4) inches of diameter or larger) must be authorized by an SAPRF representative. 1.14 TIME FOR COMPLETION If awarded this project, the Contractor agrees to complete the work within the time parameters jointly agreed upon by the City, SAPRF, and the Contractor prior to work commencement, unless specific time deadlines are specified elsewhere in these specifications. Once the work has commenced, the Contractor shall diligently prosecute the same to completion. 1.15 SUBCONTRACTORS Subcontractors used in the performance of this project shall be listed in the Contractors Bid Proposal. Subcontractors shall be properly licensed by the State of California as a contractor to perform work of this specialty and hold a valid business permit and certificate of insurance with the City of Santa Ana. Should any subcontractor fail to perform the work undertaken by him to the satisfaction of the SAPRF, said subcontractor shall be removed immediately from 47 25H -59