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Home My WebLink AboutCC RES 01-029 A RESOLUTION APPROVING URS -BRW, INC. TO COMPLETE PHASE II INVESTIGATION IN CONJUNCTION WITH THE REDEVELOPMENT OF CENTRAL PARK Meeting Sheet IIIIIIVIIIVIIIVIIIVIIIVIIIIIIIIIII 104698 Box: 31 Folder: RES 2001 Document: CC RES 01-029 A RESOLUTION APPROVING URS -BRW, INC. TO COMPLETE PHASE II INVESTIGATION IN CONJUNCTION WITH THE REDEVELOPMENT OF CENTRAL PARK • CITY OF ST. ANTHONY RESOLUTION 01-029 A RESOLUTION APPROVING URS-BRW, INC. TO COMPLETE PHASE II INVESTIGATION IN CONJUNCTION WITH THE REDEVELOPMENT OF CENTRAL PARK BE IT RESOLVED, that the City Council of the City of St. Anthony hereby approves the proposal by URS-BRW, Inc. for completion of a Phase Il investigation in conjunction with the redevelopment of Central Park attached herewith. Adopted this 2--S day of , 2001. • ee N Ma r ATTEST: City Clerk Reviewed by Administration: City Manager • URS BRW, Inc. January 17,2001 Mr.Jay Hartman Director of Public Works City of St.Anthony 3301 Silver Lake Road St.Anthony,MN 55418-1699 RE: Proposal for Phase II Investigation Central Park Redevelopment Dear Mr. Hartman: Thank you for the opportunity to present this proposal for completion of a Phase II investigation in conjunction with the redevelopment of Central Park. This proposal is based in part on the results of the Phase I Environmental Site Assessment (Phase I ESA) completed by BRW, which revealed the following recognized environmental conditions(RECs)in connection with the property: 1. A portion of the Central Park property was utilized as dumping grounds between approximately 1949 and 1954. The American Legion Post#513 reportedly operated the dumping grounds with the approval of the St. • Anthony Village Council. Dump debris was encountered in one of five geotechnical borings completed at the property in December 2000. 2. A suspected petroleum release to groundwater was identified in two of the five geotechnical borings. The suspected release was reported to the MPCA to comply with notification requirements. Several potential sources of the release were identified by the Phase I ESA, however, the exact source of the suspected release is not yet known. 3. An underground storage tank release was identified during removal of a heating oil tank at the former St. Anthony Community Center property located south/southwest of and adjacent to the property. 4. Groundwater contamination from the Twin Cities Army Ammunition Plant (TCAAP) has impacted bedrock aquifers at the property. Two monitoring wells related to the TCAAP release are located at the Site. Pretreatment results from City of St. Anthony Village water supply wells located adjacent to the property indicate that bedrock aquifers are impacted by low levels of trichloroethene and its degradation products. Minnesota Department of Health well records for the monitoring wells also indicate up to nine feet of"man- made fill'. RECs #1 and #2 will be addressed by the Phase II investigation. The MPCA leak site file for the underground storage tank release (REC #3) has been closed, meaning that no further investigation or corrective action is required at this time. Investigation and corrective actions related to the TCAAP release (REC #4) are being addressed by the USEPA. The TCAAP release should not need to be addressed in conjunction with the park redevelopment due to the nature of the release(deep aquifer contamination)and the corrective actions completed to date. • Thresher Square 700 Third Street South Minneapolis, MN 55415 612.370.0700 Tel 612.370.1378 Fax 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. URS • BRW, Inc. Jay Hartman January 17,2001 Page 3 Test Trenches and Test Pits Five test trenches will be conducted to attempt to better characterize the nature and extent of the dump materials at the site. The trenches will be advanced along the toe of the slope of the sliding hill below the parking lot. The trenches will be spaced at roughly 100-foot intervals. Trench dimensions will be up to 40 feet long, three feet wide and ten feet deep. Detailed logs of the trenches will be prepared to document the nature of the fill materials encountered. Photographs will also be taken of each trench. Samples of the dump material will be collected from the trenches for field screening and laboratory analysis. The samples will be screened for volatile organic compounds (VOCs) with a photoionization detector (PID) and for methane with a combustible gas meter. Selected samples will be submitted for laboratory analysis. The samples will be analyzed for a combination of the following parameters: • VOCs-Minnesota Department of Health(MDH)Method 466A; • Diesel Range Organics (DRO) - Modified Wisconsin Department of Natural Resources (WDNR) DRO Method; • Gasoline Range Organics(GRO)-Modified WDNR GRO Method; • • RCRA Metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver) - USEPA Method SW-846 -7000 Series; • Polychlorinated Biphenyls(PCBs) -USEPA Method 8082; and • Polynuclear Aromatic Hydrocarbons(PAHs) -USEPA Method 8270. For cost estimating purposes, we assume that two samples from each trench (ten samples) will be analyzed for each of the above parameters. Soil Borings and Temporary Monitoring Wells Eleven soil borings will be advanced at the site to characterize the nature and define the extent of the identified release to ground water at the site, and to assist in determining the extent of dump materials, and to evaluate the type and thickness of cover soils over the dump materials. Each boring will be approximately 20 feet deep. Samples will be collected from the borings at continuous two-foot intervals. Samples of the fill material will be collected for field screening and laboratory analysis. The samples will be screened for VOCs with a PID and for methane with a combustible gas meter. Selected samples will be submitted for laboratory analysis. The fill samples will be analyzed for a combination of the following parameters: • VOCs-MDH Method 466A; • DRO -Modified WDNR DRO Method; • GRO -Modified WDNR GRO Method; • RCRA Metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium and silver) - USEPA Method SW-846-7000 Series; • • PCBs -USEPA Method 8082; and • PAHs -USEPA Method 8270. URS • BRW, Inc. Jay Hartman January 17, 2001 Page 4 For cost estimating purposes, we assume that one fill sample from each boring will be analyzed for the above- indicated parameters. Temporary monitoring wells will be installed in each boring. One ground water sample will be collected from each temporary monitoring well. The samples will be analyzed for the following parameters: • VOCs-MDH Method 466A; • DRO -Modified WDNR DRO Method; and • GRO -Modified WDNR GRO Method. For cost estimating purposes, we assume that one ground water sample from each temporary monitoring well will be analyzed for the above-indicated parameters. The temporary wells will be removed following ground water sample collection. Methane Monitoring Up to five temporary gas-monitoring probes will be advanced at the property to determine the extent which methane is being generated, if any. The exact locations of the probes will be based on the results of the geophysical, test trench and soil boring investigations. Gas samples will be collected from each probe for • methane screening with a combustible gas meter. Gas samples will also be collected from the storm sewer manholes across the property for methane screening with a combustible gas meter. Task 5: Phase II Investigation Report Results of the investigation will be compiled into a Phase II Investigation Report. The report will be prepared in accordance with VIC Program guidance, and will include the following: • Background information,including Phase I ESA and geotechnical investigation results; • Drawings depicting site location, site diagram, investigation activities,extent of dump materials, and extent of groundwater impacts; • Graphical portrayal of the geophysical investigation results; • Soil boring,temporary monitoring well and test trench logs; • Tabulated field screening and analytical testing results; • Detailed analysis and summary of the investigation results; and • Conclusions and recommendations regarding the extent and magnitude of impacts at the site, and the need for corrective actions in conjunction with park redevelopment. Task 6-Response Action Plan BRW will prepare a Response Action Plan(RAP)to address environmental issues related to park redevelopment. The RAP will include details regarding the following: • worker health and safety; • emission controls during excavation; • characterization and disposition of excavated materials; URS • BRW, Inc. Jay Hartman January 17, 2001 Page 5 • on-site management of impacted materials; • thickness and type of cover materials; and • institutional controls for impacted materials left in place. A cost estimate to complete the services detailed in this proposal is provided below. Please note that investigation costs may vary and are dependant on MPCA approval of the Phase II Investigation Work Plan. Task 1: MPCA Voluntary Investigation and Cleanup Program Application Assistance BRW,Inc. Fees and Expenses $300 Task 2: Health and Safety Plan and Contingency Plan Preparation BRW, Inc. Fees and Expenses $1,700 Task 3: Phase II Investigation Work Plan BRW, Inc. Fees and Expenses $2,500 • Task 4: Subsurface Investigation Activities BRW,Inc. Fees and Expenses 10,500 Excavation Subcontractor 3,500 Drilling Subcontractor 7,500 Laboratory Analysis Subcontractor 15,500 $37,000 Task 5: Phase II Report BRW, Inc. Fees and Expenses $3,500 Task 6-Response Action Plan BRW, Inc. Fees and Expenses $7,500 ESTIMATED TOTAL: $52,500 Services will be invoiced monthly, due net 30 days and will include a description of services provided. URS • BRW, Inc. Jay Hartman January 17, 2001 Page 6 We appreciate the opportunity to provide the City with this proposal and look forward to continuing our work related to the park redevelopment. Please feel free to contact either of the undersigned at (612) 370-0700 if you have any questions or require additional information. Sincerely, BRW,INC. Chris G. Bratsch,P.E. Steve McManamon, P.G. Project Engineer Environmental Services Manager pc: Bob Kost, BRW, Inc. R:iURS Projects/St.Anthony Central ParkiPhase 11 Proposal • •