5901 23RD DR W BASE FILE 2016-01-01 MF Import

a. Specific crosion controls w bc implcmented prior to authorizing any construction activities which will impact an environmentally sensitive area as defined by the Ciry's environmentally sensitive area rcculations. b. For any facilities on or adjacent to erosion or landslide hazard areas,the construction management plun must address all mitigation measures identified in the ;eotechnical repon approved by the Planning Direcror. c. Implemontation of best management practices to control erosion both during and after construction, including compliae •e with the City of Everett's Design and Construction Standards and Specifications tvlanual and the Stormwater bfanagement btanual. d. Construction schedule, smms update reporting requirements, and contineency provisions to be�omz effective if the schedule s not met. (S6PA Eanh and N�. Policies) 2. 'I'he Ci . 'I require submittal of a geotechnical report when facilities are proposed!o be located in areas �vhich . �in potentially moisture sensiti��e soils. Mois[ure sensitive soils may include, bm crc not limitzd to, Toku! .+ely loaro, McKenr.a gravely silt lozm, Teric Medisaprists, and Mukilteo muck. The follo�ving minii..a n mitigation requiremcnts shall be met Cnr all earthwork for facilities on moismre sensitive soils unless oQienv�se recommended in the geotechnical report: • Limit site disturbance by u�ing tracked equipmen[, �vhere possible, within the excavation area. • Remove standing water from the escavation area. Outfall�rater should be filtered or run through a sedimentation basin. • Use surface erosion measures in areas in which surface��•arer is anticiputed to drain from the escavation arca. Reyuire ccntrol measures to be desiened by a professinnal civil or geotechnical eneineer, to pmvent o(fsite surface drainage of sediments. �lethods may include, but are not limited to, use of silt t"ences and/or setNement ponds. • Implem::nt a plun te minimizc the extent to�vhich these soils become disturbed. Soils which become disturF::d, and which are above their optimum moismrc conten[,should either be allowed to dry to within their upiimum moisture content and be ro-compacted,or be removed Crom ihe construction site. (SEPA Eanh and R'atcr Policics) 3. Any water qualiry enhancement or detention facilities proposed near steep slopes will require dztailed geotechnical analysis and desi�sn thut documents and ensures their sa(ery. (SEPA Earth und Wa[er Policies) 1. Prior to issuance of gradin�permits for removing eanh fmm n sire, the applicant rz, •demonstrate diat permits have been obtained for placement of the earth oft=site. (SEPA Earth and 1Vater Pohcies) Durin_Cons�ruction/farthwork >. All eanfnvork �+�ithin a geologically hnzardous area or its required buffcr must be perfomied undzr the s.ipervision of e professional civil or�eotechnical engineer. The engineer mus:provide cenifcation to the Ciry that all work was done in compliance with requirements se[ forth in the Ciry approved geotechnical report. (SLPA F_anh and �Vatcr Policies) 6. In ordcr to mmimize erosion during wnstruction, all soil piles shall be covered with plastic sheeting or o!her impervio.:s covering staked to the eround or anchored with rocks or sandbags. i3ertns, earthen or othenvise, must he ronstnicted at the perimeter of e�cava[ed areas to prevent adjacent site runoff from entering the excava�bns. (SGPA Eanh and Nater Policies) ?. 1'emporan�slopes ��ithin nntive glacial soils shall be limited to .i maximum angle of I/2 foot horizontal(H)m I foot venical (V). Temporary slopes w�thin fil; soils shall be F,mited to a maximum angle of IH:I V. Temporary slopes must be covered«ith an impennea6lz membrane,such as visqueen or mulch, in order to prevent precipitation Gom coming in contact with the soils. (S[PA C-anh and Water Policies) 6