Otak, Inc 8/15/2016 - Laserfiche WebLink

Exhibit A Continued fish and wildlife habitat conservation areas will be collected. Ordinary high water marks (OHWM) will be determined per both Ecology and the Army Corps methodologies along Union Slough and associated ditches in the project area of potential impact.The OHWM will be flagged and surveyed to incorporate in the project base map. Data sheets and photographs documenting the wetland and stream field work will be compiled and included in the Critical Area Study report.Wetlands will be rated according to the 2014 Ecology Washington State Wetland Rating System for Western Washington methodology and the City and County's rating requirements. Streams will be rated per Washington Department of Natural Resources criteria. Buffer widths for wetlands and streams will be established per City and County Critical Areas Ordinances. Assumptions: • Wetland delineations and stream/ditch characterizations will be conducted from the surface water line of the Snohomish River (induding wetland areas along the waterward side of the dike),and extending laterally for 50 feet from the landward toe of the dike in the project area of potential impact.Any critical areas beyond 50 feet will be estimated and noted in the report. • The City will notify private property owners of scheduled field work and gain right-of-entry as necessary. • Wetland flags will be located with a resource-grade GPS unit with sub-meter accuracy,and OHWM flags along Union Slough will be located with survey-grade equipment. • Geotechnical data/information on geologically hazardous areas will be collected under Task 3.1. • Data on groundwater and/or critical aquifer recharge areas will be collected under Task 3.1. Task 4.2 Prepare Environmental Baseline Documentation A Critical Areas Study (CAS) will be prepared for wetlands, streams,and other fish and wildlife habitat conservation areas.The CAS will indude all information required for compliance with both the City of Everett Critical Areas Ordinances and Snohomish County Critical Areas Regulations, induding:Wetland Determination Data Forms,Wetland Rating Forms (and figures),photographs, and supporting figures.The CAS will incorporate any relevant background information and previous studies completed for the project area as provided by the City. Assumptions: • City will provide copies of previously completed environmental documentation for the project area,if available. • City will provide comments on the Draft CAS during one round of review prior to Otak completing the Final CAS. DD5 Dike Repairs and Improvements Project 9 otak K\project\32700\32758\Contract\Scope for Phase 1—DD5 rlikr repairs final 7-22.docx