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1 <br /> Pacific dogwood, and Red alder can cause serious disease problems. <br /> Disease can become established through damaged limbs, trunks, roots, <br /> and freshly cut stumps. Diseased and weakened trees are also <br /> susceptible to insect attack. <br /> Maintenance • Inspect flagged and/or fenced areas regularly to make sure flagging or <br /> Standards fencing has not been removed or damaged. If the flagging or fencing <br /> has been damaged or visibility reduced, it shall be repaired or <br /> replaced immediately and visibility restored. <br /> • If tree roots have been exposed or injured, "prune" cleanly with an <br /> appropriate pruning saw or lopers directly above the damaged roots <br /> and recover with native soils. Treatment of sap flowing trees (fir, <br /> hemlock, pine, soft maples) is not advised as sap forms a natural <br /> healing barrier. <br /> I <br /> I <br /> I <br /> 1 <br /> t <br /> I <br /> 1 <br /> I <br /> t <br /> 4-4 Volume II— Construction Stormwater Pollution Prevention February 2005 <br />