5801 23RD DR W BASE FILE 2016-01-01 MF Import

construction limits shall be clearly �ho�� ::.. consiruction plans. Construction limits shall be clearly marked in the feld with oranoe construction fencing. • Work shall be done so as to minimize:urbidity,erosion, and other water quality impacts. • Proper crosion and sediment conirol meusures shall be follo�red m prevent sediments frcm entering crerks or Hv;lends. Erosion control measures shall be approved by the Department of Engineerine and Public Services and/or agencies with jurisdiction. Measures may include,but not be limi[ed to, placing plywood across the area where equipment will operate; mulching the «�edand areas where equipment will operate; placing wood chips atop a flexible mat to help prevent compaction (the wood chips and mat must be removed following consvuction); placing silt fences and hay bales between consvuction areas and all adjacent wedands and strcams; and placing ecolooy ulocks behveen consmiction areas and streams or wedands when a temporary fill is useJ for roads,etc. • Erosion control n;easures shall be in place ard inspected prior to commcncement of work. All erosion control strucmres shall be inspected regularly to ensure they are main[ained in working order. • If the corzidor necds ta be de�satered m do[Be work, the watcr should be pumped ro a sedimentation pond where all solids can settle or xn area where it can sheet @ow be(ore being discharged back to the stream or wedand. Turbidiq�levels in associated wctlands and strrsms shall not exceed thc standards in WAC 173- 201A. • Am� excavation materials must bc placcd in an upland area during construction. 1Vedand soils must be in separate piles Gom upland soils. After construction, wetland soils should bc retumed to the�acdand and upland salls placed in upinnd arcas. At a minimum,the top I S inches o!'topsails from wetland areas shall be stored separately from the rest of the srils anJ replaced as the eop layer of fill in the wetlands following construction. Care must be taken not to n�ake "dams" from compacted fill that�could alter ar.q subsurface (lo�v. • If a pipe is being trenched Ihroii;h the area, measures sh�ll bc taken to prevent the de-�vatering of the �vetland(e.g. cut off collars,et:.). • �Vhen operating machinery in or near water, estreme c:�rc shall be taken to prevent uny petroleum products, cement,chemicals,or other rocic or deleierious materials from entering the watee If a spill does occur, work shall be stoppzd immedi�eely and Ccology's Spill Response Section cantacted. • Lquipment maintenanm shall not occur in or adjacent to wedands and streams. • ARer construction, the si[e must be remmed to its original grades. Care must be taken to not drain ' �vetlmids or alter��at:r flo��s or patterns. I • \'��henever feasible, if wetland plant species are not im�asive, diey shou!d be removed prior m construction and placed aside in a shady damp location, such as under��•et burlap sacks. Folluwing construct:on,they I should be rcplaced in the wetland arca. • Kevc,etation: At a minimum,erosion control revegetation is required in aU eleared arcas and should include herbaceous ground cover that does not interfere with establisiunent of native vegetation. If long- tcrm reve�,etation is required, it should be uccomplished during the nes[most favorable time of year fcr the particular vegetation to ensure the highest le��el of success. (Note: If revegeta[ion does not occur immcdiatel} follu�aine recuntourine of the site,edequatz erosion convol measures must�e taken.) Native species compatible�vith preconswetion vegetation patterns shall be used for revegetation. Degraded emcrgent sites,such as Reed canary erass fields,shall be replanted with species that are represen[a[ive of a hi�:her quality cinergent,scrub-shrub or forested wetland. If reve�etation is requirtd,monitoring should orcur once a year for a minimum of t�ro years. (S[PA 1Vater, Plant and Animal,and Land and Shoreline Use Policies) � � �I �/