CC RES 01-029 A RESOLUTION APPROVING URS -BRW, INC. TO COMPLETE PHASE II INVESTIGATION IN CONJUNCTION WITH THE REDEVELOPMENT OF CENTRAL PARK

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URS • BRW, Inc. Jay Hartman January 17, 2001 Page 2 The Phase II investigation has several purposes: • Delineate the extent of the buried waste materials; • Characterize the nature of the waste materials; • Evaluate whether methane is being generated by the buried waste; • Characterize potential impacts to shallow ground water; and • Perform a preliminary risk assessment for the site. The following scope of services will be completed for the Phase II investigation. Task 1: MPCA Voluntary Investigation and Cleanup Programpplication Assistance BRW will complete and submit a MPCA Voluntary Investigation and Cleanup (VIC) Program Application for the City's use in enrolling in the VIC Program. The VIC Program provides technical assistance, expedited technical review and approval of investigations and response actions at properties with environmental impacts. This expedited review is an important factor for properties that are undergoing redevelopment. The VIC Program charges an hourly fee for their services. The MPCA fees are not included in this proposal. The City will be invoiced directly by the MPCA for their VIC Program services. • Task 2: Health and Safety Plan,Emission Control Plan and Contingency Plan Preparation A site-specific Health and Safety Plan (HSP), Emission Control Plan (ECP) and Site Contingency Plan will be prepared by BRW related to the Phase 11 investigation. The plans will be prepared in accordance with the VIC Program Guidance Document #10 entitled Site Safety and Contingency Plans. The ECP is required in the event that potentially asbestos-containing buried building materials are encountered during investigation activities. Draft plans will be submitted to the City for review and comment prior to submitting final versions to the MPCA. Task 3: Phase 11 Investigation Work Plan A Phase II Investigation Work Plan will be developed by BRW. The work plan will detail the activities proposed to meet the objectives of the Phase 11 investigation (Tasks 4 and 5). A draft work plan will be submitted to the City for review and comment prior to submitting the final version to the MPCA. Task 4: Subsurface Investigation Activities Geophysical Surveys BRW will conduct an electromagnetic survey (EM) and a magnetic survey to attempt to map the extent of the dump debris and to locate magnetic anomalies beneath the ground surface. The EM survey will be conducted using a Geonics EM-3 I* ground conductivity meter. The EM-31 can map subsurface features associated with changes in the ground conductivity, such as geological variations and groundwater contaminants. The magnetic survey will be performed with a Geometrics G-858 MagMapper' cesium magnetometer to pinpoint magnetic • anomalies within the fill material. These anomalies will be targeted for further investigation.