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treated with a suitable tree wound dressing. <br /> g. All tools being used on a tree suspected to be infected <br /> with a contagious disease shall be disinfected before being <br /> used on another tree. <br /> h. Whenever streets are to be blocked off to public service, <br /> police and fire departments shall be notified of the location <br /> and length of time the street will be blocked. Notification <br /> shall be given these departments upon the removal of such <br /> barriers or if such barriers are to remain longer than <br /> originally expected. <br /> i. To protect the public from danger, suitable street and <br /> sidewalk barriers, highway cones, or signs shall be used when <br /> pruning a tree. Flashing signals or flares shall be placed <br /> on all barriers or obstructions remaining in the street after <br /> dark. <br /> j . The stumps of all removed trees shall be cut to at least <br /> three (3) inches below the ground, and soil shall be replaced <br /> and the area leveled. If the area where the tree is removed <br /> is to be paved, the tree should be cut or stump removed at <br /> least six 6 inches below the ground. <br /> 2 . Spraying <br /> a. Suitable precautions shall be taken to protect and warn <br /> the public that spraying is being done. <br /> b. Spraying shall be done only for the control of specific <br /> diseases or insects, with the proper materials in the <br /> necessary strength, and applied at the proper time to obtain <br /> the desired control. All spraying practices shall conform to <br /> federal and state regulations. <br /> C. Dormant oil sprays shall not be applied to sugar maple, <br /> Japanese maple, beech, flowering dogwood, hickory, walnut, <br /> and most crab apple trees. Dormant oil sprays shall be <br /> applied to other trees only when the air temperature is 40 F <br /> or above and when it is not likely to drop below this <br /> temperature for a period of twenty-four (24) hours. <br /> 3 . Fertilization <br /> a. Fertilization of public trees shall follow the National <br /> Arborist Association or other accepted arboricultural <br /> standards. <br /> b. Formulations, rates, and methods of application of <br /> fertilizers shall be specified by the Municipal Forester. <br /> 4. Cavities <br /> a. Extensive cavity work should be preformed on trees only <br /> if they are sufficiently high in value to justify the cost. <br /> All cavity work shall conform to the National Arborist <br /> Association or other accepted arboricultural standards. <br /> 5. Cabling and Bracing <br /> a. As a general rule, cables should be placed approximately <br /> two-thirds (2/3) of the distance between the crotch and top <br /> branch ends. Rust-resistant cables, thimbles, and lags <br /> should be used. The ends of a cable should be attached to <br /> hooks or eyes of lags or bolts, and thimbles must be used in <br /> the eye splice in each end of the cable. In no instances <br /> shall cable be wrapped around a branch. <br /> b. All cabling and bracing practices with screw rods shall <br />