BHC Consultants LLC Amendment 1 - Laserfiche WebLink

August 26, 2016 HWA Project No. 2016-P101-21 progress reports if required. We will correspond with the City and the design team in the form of emails, fax, and telephone calls, as necessary. Geotechnical Explorations This work will include the following subtasks. • Conduct Site Reconnaissance and Utility Locates: Prior to conducting our field exploration program, HWA will conduct a reconnaissance of the site. This reconnaissance will be focused on identifying critical surface features of the site and identifying the best exploration locations. During our site reconnaissance, HWA will mark proposed boring locations and call for utility locates. • Develop Geotechnical Exploration Memorandum: HWA will prepare a Geotechnical Work Plan Memorandum for our exploration program. This work plans will be submitted to the City for review and approval. The work plan will also serve as a tool for obtaining WSDOT approval for the borings within the WSDOT right of way. The plan will detail the type, location, and extent of proposed field explorations along with logistics necessary to perform the work such as traffic control plans and staging areas. The work plans will also be used for utility locating clearances and for permitting that may be necessary to access the exploration locations. We assume the CITY will be the point of contact with WSDOT for drilling approval and permitting. .. . • Assist the City with WSDOT Coordination of Drilling program: HWA will participate in up to one meeting with the city and WSDOT with respect to our proposed explorations within the WSDOT right of way if required. • Conduct Subsurface Explorations: HWA will conduct a series of three (3) fifty(50) foot borings in the vicinity of the proposed improvements to identify and characterize the subsurface soils and groundwater conditions. Two (2) borings will be drilled within the grassy area on the west side of the chain link fence separating the open area from the WSDOT off ramp. Both of the borings will be within the WSDOT right of way and will be drilled with a track mounted drill rig. One of these borings will be drilled near the northwestern corner of the proposed weir structure. The other boring will be drilled on the western side of the chain-link fence, between the proposed weir structure and the eastern most manhole. A groundwater monitoring well will be installed at this location to allow for groundwater monitoring. A groundwater monitoring transducer will be installed within well to monitor groundwater over a period of up to 6 months. Snohomish River Overflow Structure R4