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2A DESCRIi'i'10\ OF CONTHOI. <br /> 2.l Gencral <br /> The Snohomish Etiver is the pnmary surfacc ��ater that could potentialiy be aCfected by s�te prepar�tion <br /> and construction achvities. The demoGuon, grading, and erosion and scdimcntation control plans for the <br /> site (included in Appendix A) ha��c been prepared to reduce 1he potential for surface water contamination <br /> duc to sttc acn�•mcs. <br /> Erosion nnd scdimentation control measures shall be implcmented and maint�ined in accordance with the <br /> latcst rcaision of the City of Fverett's "Stormaater �fanagement �tanual". Onsitc crosion will bc <br /> controllcd by compaction of soils, construction of ditchcs, maintcnancc of rclativcly flat gradcs. <br /> placcment of crosion control stone, tcmporary and permanent secding, and other appropriate erosion <br /> control techniques. Sedimentation ���ill b� controlled during conswcUon by usc of silt (ence, catch basin <br /> mlet protection (gravel �eith ���re mesh), stabilized construction entranee, straw b�ies, dust control, �nd <br /> other applicablc devices as appropriatc. Storntwater runoff from disturbed arcas shall be directcd to the <br /> ex�sung ca�ch basins with inlet protection for subsequent com�eyance to the Smith Isl�nd \Vaste�vater <br /> Treatmcnt Plant. <br /> Based on the hmited discharge quantiry from the sire and levcl of storm�rate� trcatment, ad��crsr impacts <br /> to sur(ace µ�aters arc anticipated to be negligibic. <br /> Dcwatcrin� acti�•itics arc not anticipated on this projcct. <br /> follow�ng completion ofconstruction, non-paved areas shall be ceget�ted «'tth appro�ed ground cover. <br /> Impacts from the use of chemicals for cleanup, or spillage o(chemicals, oil, or grease shall be miugatcd <br /> through proper handling and disposal practiccs. Construction Contractors will bc rcquircd to implcment <br /> pr�cuces (e.g., designating specific areas for fueling and maintenance) to minimire spills. titatenal <br /> stora,;e and handling arcas shall Uc located so that spills H�ill not occur adjacent to surface w�ters. [f <br /> spills occur, immediate cleanup wiil be perl'ormed �t•ith ultimate dispos�l in an appro�•ed Caciliry. Thc <br /> Convactor shall rcfcr to Sccnon G, Spill Control. <br /> Z.I Ernsiuu and Sedimcnt Cuntrol Jtri�surc, <br /> $tahilized Constructinn F.ntrancc <br /> A stabilir.cd conswction cMrancc is a tcmporary rock pad locatcd at points ol�•chicular ingress anJ <br /> cgress at a construction sitc to rcducc thc amount o(mud, dirt, rocks, ctc. transported onto public roads <br /> by motor vehicles. It is used «�hene��er traffic will be Ieaving a construction site and moving directly <br /> onto a pubGc road or othcr pavcd arcas. <br /> �4'herc fcasible, the rock used should be four to eight-inch quarry spalls. "I�hc rock pad shall be at Ieast <br /> 12 mches thick and 100 fee� in length. The design width should be the full width of�he vehicle ingress <br /> and egress arca, with a minimum ��idth o(20 fcct. <br /> The entrance shall be maintained in a condiuon which prevents tracking or flow of mud onto public <br /> nght-af-ways. Addrtional rock may be necded as pore spaces fill �aith sediment. <br /> Florida Power & Light Company Everelt Delta Power Plant <br /> SWF'PP — Revision 1 Augutit 1999 <br /> 3 <br />