6003 23RD DR W 2018-01-01 MF Import

� i� ..�i �v.... �.. . i.. i nn �c�c��oi�� WJvovivc� 1. The Palio�ving Best �lenegement Practices(B�iPs)must be foi!ow�ed for alt consmtction work through snd immediately adjacent to em�iroan,entelly sens�ti��e areas and their buffers,unless otherwise required by a permit issued by a federal or state agency, •1Vork should be done in the dry season whenecerpo5sible (June 1� to September 15), • The n idth of the corridor rhrough the wetland or stream should be minimized. • Construction staging areas tttust he located ou[side of environmentally sensitive azeas and their bttffets, unless determineo by tha Plar,nin¢ Director to be infeasible. Ssrenms,wedands, buffers, staging arees and construction limits shall be clearly shown on consauction plu.�s. Construction limits shall be clearly marked in the field ��ith orange eonstruction fencing. . Work shall be done so as to minimize turbidity, erosion, and other�vater quslity impccts. • Proper erosion and sediment control measures shall be followed to prevent sediments from entering creeks or�vedands. Erosion control measures shall be spproved by the Depattment of Engineering and Public Szrvices and'ar agencies �vith jurisdiction. Measures may include, but noc be limired to, plecing plywood a:.ross the area where equipment«•ili operate; mulching the wetland areas whem equipment will operate; placing��-ood chips a�op a tlexible mar to help prevent compaction (the wood chips and mat must be removed following construction); placing silt fences and hay bales benveen construction areas and all acjacent wetlands and streams; and placing ecology bloeks 6enveen eonstruction ereas snd sVeams ur wetlands when a temporary fill is used for roads, etc. � Erosion control measures shall be in piace and inspected prior to commencement of w�ork. Ail erosion contral structures shull be inspected regulerly to ensure they are muintained in�vo�king order, • 1f the �oRidor needs to 6e de��atcred to do ihe work, the water should be pumped to a sedimentation pon� whara ull solids car. settle or an area where it cen sheet flow before 6eing dischazged back to the streem or ��•etland. Turbidit}� le��els in associa[ed wedands and strearns shall not exceed the standards in WAC 173- '_0lA. • �ny exca�ation materials must be placed in an upland area during construction. Wetland soils must be in separate piles from upland soils. After constructirn, wedand soils should be retumed to the Hetland nnd upland soiis placed in upland areas. At a minimwn, the top I S inches oftopsoils from wecland areas shall be s[ored separately from the rest of the soils and replaced as the top la1'er of ftll in the wetlands follo�ving constr',ction. Care must be taken not to make "dams" from compacted fiil that would alter eny subsurface flo��'. � lf a pipe is being trenched thrcugh �he area, measures shall be taken to prevent the de-waterin;ofthe wedand (e.g. cut ofi eoilnrs, ete,). • �Vhen operating machinery in or near water, e�treme care shall be taken to pravent any petroleum products, cement, chemicals, or other toxic or deleterious materials from entering the��ater, If a spill does occur, work shall be scopped immediately anZ Ecology's 5pill Response Section centacted. • Equipment maintenance =.hall not occur in or adjacent to wedands and streams. • A":;cons[ruction, the site must be returned to its original grades. Care must be taken to not drain wetlands or alrer N�ater flows or patterns, � a