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Exact quantities and locations shall be as authorized by the Tree Supervisor of the City of San <br />Leandro or his designated representative. No payment shall be made for any work performed <br />which is not authorized. The City may elect to change quantities of trees for trimming by up to <br />25% without change in bid amount per tree. <br />4. STANDARDS: All tree trimming is to be done in accordance with the International Society of <br />Arboriculture, Western Chapter Pruning Standards (1988), the National Arborist Association <br />Pruning Standards for Shade Trees (revised 1988), and in compliance with ANSI Z133.1 (1988 <br />Safety Standards). Specifically the quality of work shall be consistent with the National Arborist <br />Association definition of Fine Pruning (Class 1). Contractor is required to have a thorough <br />knowledge of these standards and is to have copies of these standards on all sites where work is <br />being performed. <br />In addition, in order to minimize damage to the trees, no pruning is allowed with circular saws and <br />no climbing with spikes is allowed. <br />Trees are to be raised from the sidewalk and street, thinned, shaped, trimmed back from <br />buildings, wires, street lights and signs cleared as much as possible, long heavy limbs lightened, <br />and as is consistent with the. growth stage of the tree, have all basal and inside sucker growth <br />removed as is consistent with the above standards. On large mature trees, no scaffold limbs or <br />major limbs shall be removed, as is consistent with ISA pruning standards, unless authorized by <br />city representative. Smaller trees limb removal may be required to establish scaffold limbs, or <br />improve weight distribution. <br />Contractor will not be paid for any trees not trimmed consistent with these specifications. If at any <br />time, Contractor shows an inability to trim consistent with these specifications, the Tree <br />Supervisor, or said representative, will have the authority to order Contractor to cease all <br />trimming and to have the purchase order cancelled. <br />Successful Bidder must possess current California Contractors License D-49 Tree Trimming for <br />duration of contract <br />5. MOBILIZATION: Contractor selected shall have five (5) week days from notice by City to provide <br />proof of insurance, proof of Contractor's license, proof of business license and such other <br />documentation as required. <br />6. WORKDAYS: All trimming is to be completed within sixty (60) workdays from award of contract. <br />7. HOURS OF OPERATION: All trimming is to be done between the hours of 7:00 a.m. and 5:00 <br />P.M., Monday through Friday, unless prior approval is granted by the City Tree Supervisor or his <br />designated representative. <br />8. PAYMENT: Payment shall be on•a per tree basis. Only trees approved for trimming by the City <br />Tree Supervisor will be paid for. No payment will be made for any tree which is not trimmed as <br />per these specifications. If the Contractor's activities damage a tree to the extent where it will not <br />recover with good form in the sole judgment of the City's Tree Supervisor, Contractor shall <br />remove and replace the damaged tree with a replacement tree approved by the city. All such <br />removal/replacement costs will be borne by the Contractor with no payment from the City. If <br />Contractor does not replace a damaged tree, $500 per damaged tree will be withheld from any <br />payment due Contractor. <br />