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1 <br />1 <br />PENSKE TRUCK LEASING EVERETT ONSITE IMPROVEMENTS <br />CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN <br />Sitts & Hill Engineers, Inc. <br />Job Number 17,710 <br />Sitka spruce, Western red cedar, Western hemlock, Pacific dogwood, and Red <br />alder can cause serious disease problems. Disease can become established <br />through damaged limbs, trunks, roots, and freshly cut stumps. Diseased and <br />weakened trees are also susceptible to insect attack. <br />Maintenance Standards <br />Inspect flagged and/or fenced areas regularly to make sure flagging or fencing has not <br />been removed or damaged. If the flagging or fencing has been damaged or visibility <br />reduced, it shall be repaired or replaced immediately and visibility restored. <br />. If tree roots have been exposed or injured, "prune" cleanly with an appropriate prun- <br />ing saw or loppers directly above the damaged roots and recover with native soils. <br />Treatment of sap flowing trees (fir, hemlock, pine, soft maples) is not advised as <br />sap forms a natural healing barrier. <br />MP C102: Buffer Zones <br />Pu ose <br />Creatio f an undisturbed area or strip of natural vegetation or a/ee <br />planting th ill provide a living filter to reduce soil erosion and r <br />Conditions o se <br />Natural buffer zones used along streams, wetlands and other <br />need protection from a ion and sedimentation. Vegetative b r zones can be used to <br />protect natural swales an n be incorporated into the nat landscaping of an area. <br />Critical -areas buffer zones sh d not be used as sedi t treatment areas. These <br />areas shall remain completely urbed. The loca rmitting authority may expand <br />the buffer widths temporarily to alto a use of th xpanded area for removal of sed- <br />iment, <br />' <br />Design and Installation Specificati <br />- Preserving natural vegetation or antings clumps, blocks, or strips is generally <br />the easiest and most succes method. <br />- Leave all unstable steep pes in natural vegeta n. <br />- Mark clearing limits keep all equipment and cons ction debris out of the nat- <br />ural areas and bu zones. Steel construction fencing i e most effective method <br />in protecting se itive areas and buffers. Alternatively, wi cked silt fence on <br />steel posts i rginally effective. Flagging alone is typically effective. <br />- Keep all cavations outside the dripline of trees and shrubs. <br />- Do push debris or extra soil into the buffer zone area because it wi use <br />2014 Stormwater Management Manual for Westem Washington <br />Volume 9 - Chapter 4 - Page 268 <br />SITTS & HILL ENGINEERS, INC. 19 <br />TACOMA, WASHINGTON <br />