2008/10/01 Council Agenda Packet

4 September l 1, 2008 HWA Project No. 2008 094 • Using existing information where possible, and developing outlines, preliminary draft,draft and final deliverables in coordination with City staff and counsel including outside counsel (collectively referred to as the City in this scope) prior to submittal to third parties including Ecology. • Developing remedial actions consistent with existing Landfill Consent Decree as amended and with the Everett Riverfront Project schedule for both City and OM work. TASK t — PLANNING • Data Review/Geologic analysis. HWA will review existing available data, including consultant reports, tiles available at the City and Washington State Department of Ecology(Ecology), geologic maps, well logs, project plans. etc. We will prepare geologic cross sections and contour maps, as needed, using existing borehole information at and adjacent to the site in order to gain an understanding of site geology and hydrogeology,and how it might impact contaminant distribution, late. and transport. • Realth and Safety Plan. Prior to the beginning of the field investigation, HWA will prepare a site-specific health and safety plan(HSP), for HWA internal use only. HWA will conduct all field activities in accordance with our established health and safety policies and procedures. We will tailor the HSP to address specific site health and safety concerns_ HWA's safety procedures provide guidelines and procedures to ensure the health and physical safety of HWA staff working in the field. • Sampling& Analysis Plan (SAP). The SAP will follow the organization of this site assessment proposal, conform to Chapter 173-340-820 WAC in the Washington State Model Toxics Control Act(MICA) Cleanup Regulations,and will provide a detailed description of each principal project task and a schedule for project completion. This is necessary to ensure that everyone involved with the project understands the approach and execution of each task. • Ground water gradient: HWA will measure ground water levels in all existing wells.This proposal assumes surveying(location and elevation)of existing and new monitoring well locations by others. We will calculate ground water elevations and generate ground water potentiometric maps. We will analyze available past ground water level data to ascertain seasonal variation in ground water levels. • Sample existing wells: HWA will collect ground water samples from existing accessible monitoring wells, to confirm previous results and obtain samples from MW-7, which was not previously analyzed for petroleum hydrocarbons. 0 L.) Drywall GTS HWA SOW Exhibit A 9 17 08.doc 2 HWA GEOSCIENCES [NC.