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

a. Specific erosion controls to be implememed prior to authorizing any construction acuvities«�hich wi!I impact an environmentally sensitive area as defined by the Ciry's em�ironmentally sensitive area regulations. b. For any facilities on or adjacent to�rosion ar landslide hazard areas,the construction management plan must address all mitigation measurr.s iden .:ied in the geotechnical report approved by the Planning Direc[or. c. Implementation of hest management practices to control emsion both during and after ronstruction, inciuding compliance with the Ci[y of Everett's Design and Constructien Standards and Specifications Manual and the Stonnwater Management Manual. d. Construction schedule, status update reponing requu�„ nts, and contingency provisions to become ffective if thc schedule i; not met. (SBPA Eanh and 14ater Policies) 2. :Ci:y shall rcquire submi�tal o(a geotechnical repon when facilitics are proposed to be located in areas ��nich contain potentially moisture aensitive soils. htoistur_sensitive soils may include, but arc not limited co, "okul gravcly loam, McKenna erevely silt loam,Teric Medisaprists, and Mukiltco muck. The following minimwn mitiga[ion requiremcnts shall be me� Por all eanhwork for facilities on moistum sensi[ive sdls unless othenvise recommended in the geotecitnical repon: • Limit site disw,�ance L-y using tracked equipment, where possible, within the excavation area. • Remove standing watcr from the e�ca��ation �uea. Outfall�vater should be filtered or run tt�rou�i a sedimentation basin. • Use surface erosion measures in areas in which surface w�iter is anticipated to drain from the excavation area. Require control measures to be designed by a professional civil or geotechnical engineer,to prevent ofisite surface drainage of se:diments. Methods may include, but are not limited to, use uf silt fences anNor settlement ponds. • hnplement a plan to minimize the extent to which these soils bernme dismrbed. Soils which become disturbed, and which are above thcir optimwn moisture content,should either b;allo�red to dry to within their optimum moisture content and be re•compacted, or bc removed from the construction site. (SEPA @mtli and \Vatcr Policies) 3. An;� �rater quality enhancement cr detention facilities proposed near steep slopes will require detailed eeotechnical analysis nnd design thnt documents and ensures their safery. (SEPA Earth and Water Policies) 4. Prior to issuance of grading pennits for removing earth from a site, the applicant must demonstrate tliat pennits have been obt:aineJ for placement of the earth off-site. (SL-PA C•anh and Wa[er Policies) Durine Conslruction/Earth�vork 5. All enrthworl:within a;eologically hazardous arca or its required buff'cr must be perCormed under the supervision of.� professional civil or geotechnical engineec The en�=ineer must provide cenification to the City that all work�ras done in compliance with requirements set forth in the Ciry approved gzorechnical report. (SEPA Eatth and 11'atcr Yolicics) G. In order to minimize erosion during construction, all soil piles shall be covered��ith plastic sheeting or o[her ir.tpervious covering staked to the eround or anchored with rocks or sandbags. Dertns,earthen or othenvise, � ,aust be constructed at tiie perimeter of escaeated areas m pre��ent adjacent site ��iof�from entering the e�cavations. (SI:PA Earth and V✓ater Policiesi 7. Temponry slopes �vithin nati��e glacial soils shall be limited to a masimum an��le of 1/'_ foot horizontal ({1)ro I f'oot vrtical (V). "I'emporary slopes within fiU soils shall be limited to a masimum angle of IH:I V. Temporary slopes mus�be covered�vith an impemieable membrane,such as visqueen or mulch, in order to prevent precipimtion Gom coming in contact with tlic soils (SEPA Garth and R'atcr Policies) / �I � � / ✓