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Home My WebLink About2012-06-18 ENR Packet AGENDA CITY OF MAPLEWOOD ENVIRONMENTAL AND NATURAL RESOURCE COMMISSION Monday, June 18, 2012 7 p.m. Council Chambers - Maplewood City Hall 1830 County Road B East 1. Call to Order 2. Roll Call 3. Approval of Agenda 4. Approval of Minutes: a. April 16, 2012 b. May 21, 2012 5. Public Hearing a. National Pollutant Discharge Elimination System Phase II and Municipal Separate Storm Sewer System Permit 2011 Annual Report 6. Unfinished Business a. East Metro Public Safety Training Center and Marshlands (Century Ave. and Highway 5) – Review of Project 7. New Business a. 3M Trail Concept Plans – Exemption to Wetland Ordinance for Semi-Public Trail Within the Wetland Buffer b. Old Maplewood Dump Site Clean Up 8. Visitor Presentations 9. Commission Presentations 10. Staff Presentations a. Update on Solid Waste Management Ordinance and Standards b. Turf Parking Update c. Maplewood Nature Center Programs 11. Adjourn Agenda Item 4.a MINUTES CITY OF MAPLEWOOD ENVIRONMENTAL AND NATURAL RESOURCES COMMISSION 7:00 p.m., Monday, April 16, 2012 Council Chambers, City Hall 1830 County Road B East 1. CALL TO ORDER A meeting of the Environmental and Natural Resources Commission was called to order at 7:00 p.m. by Chairperson Edmundson. 2. ROLL CALL Randee Edmundson, Chair Present Judith Johannessen, Vice Chair Present Absent Carol Mason Sherrill, Commissioner Ann Palzer, Commissioner Present Bill Schreiner, Commissioner Present Dale Trippler, Commissioner Present at 7:09 p.m. Ginny Yingling, Commissioner Present Staff Present Shann Finwall, Environmental Planner Susan Young, Consultant, Foth Environment & Infrastructure 3. APPROVAL OF AGENDA Commissioner Trippler moved to approve the agenda as submitted. Seconded by Chair Edmundson. Ayes All The motion passed. 4. APPROVAL OF MINUTES Commissioner Trippler moved to approve the March 19, 2012, Environmental and Natural Resources Commission meeting minutes as submitted. Seconded by Commissioner Palzer. Ayes Chairperson Edmundson, & Trippler Abstain Commissioner Schreiner The motion passed. 5.UNFINISHED BUSINESS a. Solid Waste Management Ordinance and Standards i. Environmental Planner, Shann Finwall gave the report on the Solid Waste Management Ordinance and Standards and answered questions of the commission. Ms. Finwall introduced Susan Young. April 16, 2012 1 Environmental and Natural Resources Commission Meeting Minutes ii. Susan Young, Foth Environment & Infrastructure addressed and answered questions of the commission regarding the Solid Waste Management Ordinance and Standards. The commission went through the ordinance and recommended several changes and clarifications to be made. Following is a summary of those changes: The sections should be segregated so it is easy to understand if the ordinance is referring to single family, multiple family, or commercial regulations. Change the hierarchy of the purpose statements to ensure the goal is to reduce waste first. Add the Minnesota Department of Safety requirements under the vehicle requirement section. There should be no fee for walk up, every other week, or temporary stoppage of trash for vacations. the Maplewood Trash Plan at the end of their first contract period after June 1, 2012. Commissioner Schreiner moved to approve the Solid Waste Management Ordinance and Standards with corrections to be made by staff. Seconded by Commissioner Johannessen. Ayes All The motion passed. 6.NEW BUSINESS None. 7.VISITOR PRESENTATIONS None. 8.COMMISSION PRESENTATIONS a. Fish Creek - Commissioner Yingling stated she would like to give the commission an update on Fish Creek at the next ENR meeting. Commissioner Yingling briefly mentioned the $100,000 Fish Creek Bonding Bill. b. All Parks Clean Up - Chairperson Edmundson discussed the Ramsey County All Parks Clean Up on the north side of Phalen Lake on Saturday, April 14, 2012. 9.STAFF PRESENTATIONS a. Spring Clean Up and Home Expo Staff stated the Maplewood Spring Clean Up day is Saturday, April 21, 2012, in the parking lot of Aldrich Arena from 8 a.m. to 1 p.m. The Clean Up will coincide with the Home Expo which is taking place in the Aldrich Arena building from 10 a.m. to 5 p.m. Commissioner Johannessen discussed the booth the ENR Commission will have at the Home Expo. Commissioners Johannessen and Palzer will staff the booth and will highlight energy conservation and the home energy squad, rainbarrels, compost bins, and Emerald Ash Borer and the Japanese beetle. April 16, 2012 2 Environmental and Natural Resources Commission Meeting Minutes b. Waterfest Saturday, June 2 The Ramsey Washington Metro Watershed District is holding Waterfest on Saturday, June 2, 2012, at the Lake Phalen Pavilion in St. Paul from 11 a.m. to 4 p.m. c. Maplewood Nature Center Programs Staff discussed upcoming events at the Maplewood Nature Center. For more information call the Maplewood Nature Center at 651-249-2170. 10. ADJOURNMENT Chairperson Edmundson adjourned the meeting at 8:23 p.m. April 16, 2012 3 Environmental and Natural Resources Commission Meeting Minutes Agenda Item 4.b. MINUTES CITY OF MAPLEWOOD ENVIRONMENTAL AND NATURAL RESOURCES COMMISSION 7:00 p.m., Monday, May 21, 2012 Council Chambers, City Hall 1830 County Road B East 1. CALL TO ORDER A meeting of the Environmental and Natural Resources Commission was called to order at 7:02 p.m. by Chair Edmundson. 2. ROLL CALL Randee Edmundson, Chair Present Judith Johannessen, Vice Chair Present Carol Mason Sherrill, Commissioner Present Ann Palzer, Commissioner Present Absent Bill Schreiner, Commissioner Dale Trippler, Commissioner Present Ginny Yingling, Commissioner Present Staff Present Shann Finwall, Environmental Planner 3. APPROVAL OF AGENDA Staff added 9. e. Arbor Day Update. Staff is tabling the minutes of April 16, 2012, as the incorrect minutes were included in the packet. Commissioner Johannessen moved to approve the agenda as amended. Seconded by Commissioner Trippler. Ayes – All The motion passed. 4. APPROVAL OF MINUTES The ENR minutes for April 16, 2012, are tabled until the June meeting. 5. NEW BUSINESS a. East Metro Public Safety Training Center and Marshlands (Century Avenue and Highway 5) – Review of Project and Wetland Map Change i. Environmental Planner, Shann Finwall gave the report on the East Metro Public Safety Training Center and Marshlands and answered questions of the commission. ii. The Commission discussed the project and had the following comments: a. Concerns about water quality issues. b. Concerns about wetland impacts. May 21, 2012 1 Environmental and Natural Resources Commission Meeting Minutes Commissioner Yingling made a motion to recommend approval to remove the non-historical and incidental wetlands (Wetlands 3 through 6) on the East Metro Public Safety Training Center site from the Maplewood Wetland map based on the advice and review of the Ramsey Washington Metro Watershed District. Seconded by Commissioner Johannessen. Ayes – Chair Edmundson, Commissioners Johannessen, Palzer & Yingling Abstentions – Commissioners Trippler & Mason Sherrill The motion passed. This item goes to the Planning Commission for a public hearing on June 5, 2012, and to the City Council on June 25, 2012. 6. UNFINISHED BUSINESS None. 7. VISITOR PRESENTATIONS None. 8. COMMISSION PRESENTATIONS Fish Creek Update a. – Commissioner Yingling gave an update on Fish Creek and the purchase of the Fish Creek area for $2.6 million dollars which has to be paid for by the end of 2013. The Friends of the Mississippi River Corridor is acting as the fiscal agent to handle the tax deductible donations. This will help in the effort to purchase this property and to protect and restore the Fish Creek area. There will be fundraisers, events hosted and there will be a Fish Creek Forever visibility campaign. 9. STAFF PRESENTATIONS a. Update on Maplewood Trash Plan: Ordinance, Standards, Cart Orders i. Environmental Planner, Shann Finwall gave an update on the trash plan stating she has spoken to over 500 people and about half of the residents have responded to the new trash program. The trash cart order will be submitted to Allied Waste Services on June 15, 2012. Allied Waste Services will begin delivering carts beginning September 10, 2012, until they are completely delivered by the end of September. And October 1, 2012, the Maplewood residents will use their new trash carts. The existing carts will be picked up by the haulers in October. The residents who don’t return their trash cart order will be delivered a 95 gallon cart. Residents can switch cart sizes at that time, or anytime thereafter. The city will be sending out information to townhomes and manufactured homes on the procedure for opting in soon. b. Waterfest – Saturday, June 2 The Ramsey Washington Metro Watershed will be holding Waterfest on Saturday, June 2, 2012, from 11:00 a.m. – 4:00 p.m. There will be a booth reserved for the ENR Commission and the Maplewood Nature Center. Fish Creek will be highlighted. May 21, 2012 2 Environmental and Natural Resources Commission Meeting Minutes c. Taste of Maplewood – July 4 The Taste of Maplewood will be held at Hazelwood Park in Maplewood, Wednesday, July 4, 2012, from 4:00 p.m. until the end of the fireworks. Fireworks will be held at dusk. You may bring a chair or blanket but no coolers will be allowed. There will be music, food and concessions as well as crafts. d. Maplewood Nature Center Programs There are many programs going on with the Maplewood Nature Center. For further information you may call 651-249-2170. There will also be a city-wide garage sale combined with Maplewood and North St. Paul. So far there are 90 homes involved in the garage sale which will be held Saturday, June 2, 2012, from 8:00 a.m. until 2:00 p.m. e. Arbor Day Update On May 12, 2012, the city celebrated Arbor Day at Lions Park. Two Lion’s groups donated the 19 trees and refreshments. There were 50 people that attended. 30 people helped plant 19 trees. The two Lion’s groups were the Maplewood-Oakdale Lions as well as the St. Paul East Parks Lions group. 10. ADJOURNMENT Chair Edmundson adjourned the meeting at 8:23 p.m. May 21, 2012 3 Environmental and Natural Resources Commission Meeting Minutes Agenda Item 5.a. AGENDA REPORT ENVIRONMENT AND NATURAL RESOURCES TO: Environmental and Natural Resources Commission FROM: Steve Kummer, Civil Engineer II SUBJECT:NPDES Phase II and MS4 Permit, 2011 Annual Report DATE: June 11, 2012 for June 18, 2012 ENRC Meeting INTRODUCTION As part of Maplewood’s National Pollutant Discharge Elimination System (NPDES) permit, the City of Maplewood is required to prepare an annual report detailing the progress made in the previous year toward satisfying the requirements of the permit. Part of this process is soliciting public comment. A minimum 30-day comment period and formal public hearing is required as part of updating the permit. The Environmental and Natural Resources (ENR) Commission should hold the public hearing for the City’s permit at the June 18, 2012 regular meeting. BACKGROUND A 1987 amendment to the federal Clean Water Act required implementation of a two-phase comprehensive national program to address pollution from stormwater runoff. This program was named the National Pollutant Discharge Elimination System (NPDES). Since 1991, NPDES Phase I regulated cities with populations of 100,000 or more. NPDES Phase II took effect in 2003, regulating cities with populations of 10,000 or more. Maplewood was among a group of approximately 220 cities in Minnesota affected by NPDES Phase II. The State of Minnesota regulates the disposal of stormwater by a State Disposal System (SDS) permit. The Minnesota Pollution Control Agency (MPCA) administers both NPDES and SDS permits in Minnesota. In turn, the MPCA regulates cities and other public entities through its Municipal Separate Storm Sewer System (MS4) permit. In 2006, the city submitted its permit application to the MPCA. The permit cycle runs five years with the next issuance of the permit scheduled for January 2012. The permit application requires the city to develop a Storm Water Pollution Prevention Plan (SWPPP). The MPCA has established six minimum control measures the SWPPP must address. They are: - Public Education and Outreach - Public Participation and Involvement - Illicit Discharge, Detection and Elimination - Construction Site Storm Water Runoff Control - Post-Construction Storm Water Management - Pollution Prevention and Good Housekeeping Maplewood’s SWPPP defines the Best Management Practices (BMPs) the city intends to use to minimize pollution from stormwater runoff for each of the six minimum control measures. DISCUSSION The City’s SWPPP has been available for public viewing at the Public Works Department front Counter and is also posted on the City’s website under the Stormwater webpage. An advertisement for the public hearing and the Plan viewing was first posted on May 23, 2012 in anticipation of the 30-day public comment period. Staff has prepared a draft of the City’s annual report, will make a short presentation on the SWPPP, and will report on progress made toward the permit goals in 2011. Following the presentation, the ENR Commission should formally open the meeting floor to public comment. When all comments have been received, staff will address those comments, incorporate the comments and then finalize the report for submittal to the MPCA. RECOMMENDATION AND ACTION Staff recommends ENR Commission provide comments and open the meeting floor to public comment on the City’s 2011 Annual SWPPP report. City staff will compile and address public comments and incorporate them in the final SWPPP report submittal to MPCA. Attachments 1. Full Maplewood SWPPP can be viewed at www.ci.maplewood.mn.us/stormwater Agenda Item 6.a MEMORANDUM TO: Environmental and Natural Resources Commission FROM: Shann Finwall, AICP, Environmental Planner SUBJECT: East Metro Public Safety Training Center and Marshlands – Review of Project LOCATION: Century Avenue and Highway 5 DATE: June 13, 2012 for the June 18 ENR Commission Meeting INTRODUCTION The city is proposing to build a Public Safety Training Center on a 20.5 acre vacant property located at the intersection of Century Avenue and Highway 5. The property is currently owned by the Minnesota Department of Transportation (MnDOT). One of the conditions of the city’s acquisition is that the property be used for a public use. Additionally, MnDOT will maintain at least 5 acres for their ongoing operations (primarily soil stockpiling and snow storage) until they are able to find an alternative location for these operations. In addition to the training center the city is proposing Marshland improvements. Marshlands is the name of the county open space which surrounds the property. The improvements will be located on a portion of the city’s property and the county open space and will include: wetland buffer enhancements, the creation of natural areas, trails, and educational components. BACKGROUND The Environmental and Natural Resources Commission reviewed the project during their May meeting. The commission recommended approval of the removal of four incidental wetlands located on the site from the City’s wetland classification map. These wetlands were developed incidentally as a result of the activities associated with the grading and fill material completed by the MnDOT on the site in the 1970s. The wetland delineation report found the wetlands to be incidental. Ramsey-Washington Metro Watershed District’s Technical Evaluation Panel agreed with the assessment and will be removing the wetlands from their wetland maps and regulatory review. During the ENR Commission’s review in May, the commission requested review of more detailed stormwater plans to ensure water quality of the wetlands were not impacted by stormwater and fire training retardants used on the site. DISCUSSION Ron Leaf of SEH submitted the attached renderings (Attachments 1 and 2) and preliminary drainage plans (Attachment 3). The goal of the stormwater management system on the site will be to use sustainable features such as rain water gardens and surface sheet flow in paved areas to reduce or eliminate the need for storm sewer. The site will be graded generally to drain to the north and west perimeter of the property. The access road, training yard and parking lot areas will have curb and gutter around the perimeter and will be installed with curb cuts to allow runoff to be directed into rainwater gardens located to the north and south. A ribbon curb around the main yard is also being considered to further reduce concentrated flow conditions at curb cut areas. Pretreatment for the rainwater gardens will be a combination of vegetated swales and shallow catch basins with sumps to collect sediment and debris. These rain garden areas would serve primarily as water quality treatment systems, but also would provide some larger storm detention for runoff from training facility. Similar concepts will be incorporated into the south portion of the site that will be owned and operated by MnDOT. The area to the north and west of the site is adjacent to a large Manage B wetland requires a 75-foot buffer according to City standards. This buffer zone will be enhanced by removal of invasive species, some grading to improve the drainage and slopes, addition of topsoil in highly impacted areas and restoration of the area with natives plants. An extended maintenance provision will be added to the project to protect and manage the restored buffer area during the plan establishment period. During future phases of work on the classroom building and parking areas, porous pavement options will be considered where the larger truck traffic will not occur such as the standard vehicle parking stalls surrounding the building. Training activities at the facility will use a combination of City water and Class A fire retardant foam. Class A foam is environmentally safe, and is used by the DNR to fight forest fires in the Boundary Waters Canoe Area, for example. RECOMMENDATION Steve Lukin, Fire Chief and Ron Leaf of SEH will be present during the June 18 meeting to discuss the project and answer questions of the commission. The ENR Commission should review and comment on the East Metro Public Safety Training Facility stormwater management plan. The City Council will hold final review of the project on June 25, 2012. Attachments 1. Public Safety Training Facility Rendering 1 2. Public Safety Training Facility Rendering 2 3. Preliminary Drainage Plan 2 Agenda Item 7.a. MEMORANDUM TO: Environmental and Natural Resources Commission FROM: Shann Finwall, Environmental Planner SUBJECT: 3M Trail Concept Plans – Exemption to Wetland Ordinance for Semi-Public Trail Within the Wetland Buffer DATE: June 13, 2012 for the June 18 ENR Commission Meeting INTRODUCTION 3M is proposing a 1.2 mile trail and boardwalk around their wetland (3M Lake) located south of the Leadership Development Institute building (278 Minnehaha Avenue) (Attachment 1). The wetland is classified as a Manage B wetland on the City’s wetland classification map (Attachment 2). DISCUSSION Trail Project Description Chuck Evans of Damon Farber Associates and Darren Schwanki of TKDA have prepared the attached project description (Attachment 3). The description details the design and construction of a recreational walking/jogging trail around 3M Lake, and a boardwalk across it. They report that the wetland is currently inaccessible, hidden, and under-valued at 3M Center. The proposed trail and boardwalk will allow users to experience and better understand the natural environment. Wetland Ordinance Requirements The wetland is classified as a Manage B wetland. The wetland ordinance requires that a 75-foot buffer be maintained around a Manage B wetland. The trail and boardwalk are proposed to be located within the buffer.The ordinance allows for the construction of a semipublic trail and boardwalk within a buffer if the city determines that there is a greater public need for the project than to meet the requirement of the ordinance. Semipublic is described as land that is maintained by a private organization for public use. In waiving the requirements the city should apply the following standards: 1. Trails shall not be allowed when endangered or threatened species are found to be present in the buffer. 2. Buffers shall be expanded, equal to the width of the trail corridor. 3. The owner or contractor shall replant all disturbed areas next to the trail in a timeframe approved by the city. 4. All necessary erosion control measures must be in place before constructing a trail. The erosion control measures must also be maintained and inspected by the city to ensure that the wetland or stream is not compromised by trail construction activities. 5. The trail must be designed and constructed with sustainable design methods. 6. Boardwalks are allowed within the buffer and shall be a maximum of 12 feet in width. 7. The administrator may require additional mitigation actions. Mitigation Strategies 3M proposes several mitigation strategies to counter impacts to the environment from the construction of the trail. The strategies are detailed in the attached project description and include GPS technology to align the trail and minimize disturbance and avoid mature trees; buckthorn removal; expanding the delineated buffer; an infiltration basin to pre-treat existing parking lot runoff; oak savannah reforestation; and aquatic plant enhancement. SUMMARY The wetland ordinance allows staff to waive the requirements of the ordinance for the construction of a semipublic trail within the wetland buffer. Because of the size and scope of the 3M wetland trail and boardwalk project, however, staff is also requesting review and comment by the Environmental and Natural Resources Commission. The feedback received will be used to finalize conditions of approval for the project. Attachments: 1. Map of Trail and Boardwalk Alignment 2. Wetland Classification Map 3. Trail and Boardwalk Proposal 2 Attachment 3 Agenda Item 7.b. MEMORANDUM TO:Environmental and Natural Resources Commission FROM:Shann Finwall, AICP, Environmental Planner Old Dump Site Clean Up SUBJECT: DATE:June 14, 2012 for the June 18 ENR Commission Meeting BACKGROUND The Maplewood Dump operated for the disposal of general municipal solid waste and industrial waste from the 1950s to 1970. The site is located north of Pondview Apartments, south of the railroad tracks, west of Feed Products and Jim’s Prairie, and east of Rolling Hills Manufactured Home Park. Phase I and II Environmental Site Assessments were completed in 1995 and 1999 (site map and geologic cross section map attached). It was determined that site soil and sediments were above regulatory action limits. Groundwater sampling did not indicate contaminants above action limits. In 2001, the City of Maplewood entered into a Voluntary Investigation and Cleanup (VIC) program with the Minnesota Pollution Control Agency (MPCA) for the Maplewood Dump site. The VIC Program is a voluntary program designed to assist organizations with necessary clean up actions. The MPCA approved a Response Action Plan (RAP) for cleanup of the site which included covering the site with four feet of cover across the site. In 2002 the City obtained a Ramsey-Washington Metro Watershed District permit as part of the RAP which allowed the City to cover the site with street sweepings. The property is guided as open space in the City’s Comprehensive Plan and is located adjacent to Jim’s Prairie, one of Maplewood’s 14 Neighborhood Preserves. DISCUSSION Clean Up Proposal In 2011 the City Council authorized a budget and scope of work for the continued investigation and planning for the Maplewood Dump site. Short Elliott Hendrickson Inc. (SEH) was hired to gather information and to draft a revised RAP for the site. The revised RAP was completed on April 5, 2012, and recently approved by the MPCA. The Plan covers the management of impacted soils and debris at the former Maplewood Dump site. The intent of the RAP is to facilitate the closure of the site by preventing direct human contact with surface debris and impacted soil material and to reduce potential of the Beaver Creek bed to be in contact with waste debris. This will be achieved through the removal and proper disposal or recycling of exposed large debris on the surface; developing a minimum four-foot separation thickness between former municipal solid waste material and the surface; flow from Beaver Creek will be maintained and directed through an appropriately sized control structure (culvert) through the former dump area to reduce potential contact with waste in the current creek bed. Wetland Impacts The City will import fill material to the site in order to cover the site and meet the four-foot separation thickness. The fill area will include a minimum of six inches of topsoil at the surface to aid in the proper revegetation of the area. There is a wetland located on the north side of the site, adjacent the railroad tracks. This wetland is classified as a Manage B wetland on the City and Ramsey-Washington Metro Watershed District wetland classification maps. The City’s wetland ordinance requires a 75-foot buffer be maintained from a Manage B wetland and 100- foot buffer be maintained from the creek. There is visible debris within both buffers and within the creek bed itself. The project includes directing the creek through a culvert to reduce potential contact with waste in the creek bed and covering the site, including the required 75- foot wetland and 100-foot creek buffers. The wetland ordinance allows the City Council to waive the requirements of the ordinance for public projects through buffers where it determines that there is a greater public need for the project than to meet the requirement of this ordinance. In waiving the requirements the city council shall apply the following standards: 1. The city may only allow the construction of public projects through buffers where there is no other practical alternative. 2. Before the City Council acts on the waiver the Planning Commission and the environmental and natural resources commission shall make a recommendation to the City Council. The Planning Commission shall hold a public hearing for the waiver. The city shall notify the property owners within 500 feet of the property for which the waiver is being requested at least ten days before the hearing. 3. Public projects shall not be allowed when endangered or threatened species are found in the buffer. 4. Public projects shall be as far from the wetland as possible. 5. Public projects shall protect the wetland and buffer and avoid large trees as much as possible. 6. The city shall not allow the use of pesticides or other hazardous or toxic substances in buffers or wetlands; however, in some situations the use of herbicides may be used if prior approval is obtained from the administrator. 7. The owner or contractor shall replant utility or street corridors with appropriate native vegetation, except trees, at preconstruction densities or greater after construction ends. Trees shall be replaced as required by city ordinance. 8. Any additional corridor access for maintenance shall be provided as much as possible at specific points rather than to the road which is parallel to the wetland edge. If parallel roads are necessary they shall be no greater than 15 feet wide. 9. The City Council, upon recommendation of the administrator, may require additional mitigation actions as a condition of granting the waiver. A condition of the wetland buffer waiver will include a permit from the Ramsey-Washington Metro Watershed District. The watershed district has reviewed preliminary plans and has expressed support for the project. 2 Tree Impacts The tree line and tree removal have been identified on the grading plan. Several significant trees will be impacted by the project. A condition of the wetland buffer waiver will include a tree survey and tree replacement plan to meet the City’s tree replacement ordinance. Revegetation Condition of the RAP and wetland buffer waiver include detailed plans and specifications for the Beaver Creek control structure and a revegetation plan. Schedule Improvements to the site should be complete by Fall of 2012. The initial work will consist of importing fill to the site starting in July. Excess clean fill material from the Gladstone Savanna project will be stockpiled in the northwestern portion of the dump site. The wetland impacts and mitigation plan will be reviewed again with the watershed and technical evaluation panel and the permit for the work should be ready by mid-August. Clearing and grubbing would take place in late August or early September, followed by placement of the pipe and site grading. Seeding and restoration work would be completed in late September. Review by the Planning Commission and City Council is tentatively scheduled for July 16 and 23, respectively. RECOMMENDATION Review the old City dump clean up plans and wetland and creek buffer waiver request. Offer feedback on the proposed project. A recommendation should be made to the Planning Commission for their review, tentatively scheduled for July 16. Attachments: 1. Site Map 2. Geological Cross Section 3. April 2012 Response Action Plan 3 Attachment 3 Response Action Plan Former City of Maplewood Dump Site Maplewood, Minnesota MPCA Project No. VP0100 SEH No. MAPLE 116519 April 5, 2012 Former City of Maplewood Dump Site Response Action Plan Maplewood, Minnesota SEH No. 116519 MPCA VIC No. VP0100 April 5, 2012 __________________________________ Allen H. Sunderman, PG Project Manager __________________________________ John Kinny Environmental Scientist Short Elliott Hendrickson Inc. 3535 Vadnais Center Drive Saint Paul, MN 55110-5196 651.490.2000 Table of Contents Letter of Transmittal Certification Page Table of Contents Page 1.0 Introduction ................................................................................................................1 1.1 Site Location ....................................................................................................... 1 1.2 Site Description ................................................................................................... 1 1.2.1 Site History .............................................................................................. 1 1.2.2 Proposed Land use ................................................................................. 1 2.0 Summary of Past Site Investigations .......................................................................1 2.1 Phase I Environmental Assessment ................................................................... 1 2.2 Phase II Environmental Investigation .................................................................. 2 2.2.1 Results of Soil Quality Investigation ........................................................ 2 2.2.2 Results of Ground Water Quality Investigation ....................................... 2 2.2.3 Results of Methane Monitoring................................................................ 2 2.3 Former Response Action Plan ............................................................................ 3 3.0 RAP Goal, Objectives and Scope .............................................................................4 3.1 RAP Goal ............................................................................................................ 4 3.2 RAP Objectives ................................................................................................... 4 3.3 Response Actions ............................................................................................... 4 3.3.1 Surface Debris Removal ......................................................................... 4 3.3.2 Clean Soil Import ..................................................................................... 4 3.3.3 Beaver Creek Control Structure .............................................................. 4 3.3.4 Well Sealing ............................................................................................ 5 3.3.5 Revegetation ........................................................................................... 5 4.0 RAP Implementation ..................................................................................................5 4.1 General Operations ............................................................................................. 5 4.2 Permits ................................................................................................................ 5 5.0 RAP Implementation Report .....................................................................................5 6.0 Site Health and Safety Plan ......................................................................................6 7.0 Contingency Plan ......................................................................................................6 8.0 Summary ....................................................................................................................6 SEH is a registered trademark of Short Elliott Hendrickson Inc. Response Action Plan MAPLE 116519 City of Maplewood Page i Table of Contents (Continued) List of Figures Figure 1 – Site Location Figure 2 – Site Features Figure 3 – Grading Plan List of Appendices Appendix A Historical Site Documentation Response Action Plan MAPLE 116519 City of Maplewood Page ii April 2012 Response Action Plan Former City of Maplewood Dump Site Prepared for City of Maplewood 1.0 Introduction ® Short Elliott Hendrickson Inc (SEH) has prepared this Response Action Plan and Construction Contingency Plan on behalf of the City of Maplewood (City). The Plan covers the management of impacted soils and debris at the former City of Maplewood Dump Site (the Site). According to the Minnesota Pollution Control Agency (MPCA) What’s in My Neighborhood website the Site is an inactive Voluntary Investigation and Cleanup (VIC) Site (MPCA VIC No. VP0100). 1.1 Site Location The Site is located between McKnight Road and Century Avenue and south of a railroad track in Maplewood, Minnesota (South ½ sec. 24, T.29N, R.22W). The Site location is Figure 1, “Site Location” presented on . 1.2 Site Description The Site is currently a non-operational city owned municipal waste dump and a majority of the property is vacant idle land. The subject property is located in a mixed residential and vacant area. The Site is approximately 10 acres in size and is bordered to the north by a railroad track and on the east by a trailer park. The southern boundary consists of the Pondview Apartment complex and a pond. The western boundary is vacant land.The Site is bisected by Beaver Creek and associated wetlands, which flows from a large wetland north of Figure 2 “Site the railroad tracks (via culvert) into the pond south of the former dump site. Features” identifies general site characteristics 1.2.1Site History The property is owned by the City of Maplewood. According to reports reviewed for this assessment, the Site was formerly used for disposing of municipal solid waste (MSW) from the 1950s to 1970. 1.2.2Proposed Land use The City of Maplewood intends to cap the dump site area and keep the land vacant. 2.0 Summary of Past Site Investigations 2.1 Phase I Environmental Assessment A Phase I Environmental Assessment (ESA) was completed by American Testing and Engineering Corporation (ATEC) in October, 1995. The Phase I ESA is presented in Response Action Plan MAPLE 116519 City of Maplewood Page 1 Appendix A “Historical Site Documentation” . The Phase I ESA identified the Site as a former City of Maplewood municipal solid waste dump site and recommended further evaluation of the subsurface soils and groundwater. As part of the Phase I Investigation, surface water samples were collected at creek locations entering and leaving the Site. The samples were analyzed for volatile organic compounds (VOCs) and Resource Conservation Recovery Act (RCRA) metals. Laboratory analysis indicated no presence of VOCs. Barium was detected at 0,06 parts per million (ppm) and 0.07 ppm upstream and downstream, respectively. 2.2 Phase II Environmental Investigation A Phase II Investigation was completed by Service Environmental and Engineering (Service) in November, 1999. The Phase II Investigation concluded the average thickness of the MSW is five feet and approximately 66,000 cubic yards of MSW is located on the Site. The Service Appendix A “Historical Site Documentation” Phase II Investigation report is presented in . 2.2.1Results of Soil Quality Investigation Service excavated 21 test pits and completed six soil borings to characterize the subsurface and collect analytical soil samples for laboratory analysis. Two to four feet of clean fill covers approximately five to ten feet of MSW. A layer of peat underlies the MSW. Partially buried mixed municipal solid waste is visible at the surface at portions of the Site near the creek. Figures depicting the boring and test pit locations and a west to east cross section of Appendix A the dump area is presented in Service Phase II Investigation Report in . Soil samples from the test pits and soil borings were analyzed for VOCs, polynuclear aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), RCRA metals, select organochloride pesticides. VOCs, PAHs, PCBs, RCRA metals, and orgaochloride pesticides were detected at the Site. Concentrations that exceeded the Minnesota Pollution Control Agency (MPCA) Soil Reference Values for unrestricted use were: PCBs (2.1 ppm) at test pit TP-11 at 4 feet below ground surface (bgs) Lead (500 ppm) at test pit TP-18 at nine to ten fet bgs 1,2,4 trimethylbenzene (32 ppm) at test pit TP-20 at 11 feet bgs 2.2.2Results of Ground Water Quality Investigation Ground water samples were collected from three ground water monitoring wells and two temporary ground water monitoring wells in October, 1997 and from the three monitoring wells in December, 1997 and February, 1999. The ground water samples were analyzed for VOCs, PAHS, PCBs, RCRA metals, and organochlorine persticides. Concentrations of VOCs, PAHs and RCRA metals were detected below the Minnesota Department of Health (MDH) Health Risk Limits (HRLs). 2.2.3Results of Methane Monitoring Methane monitoring was completed during the excavation of test pits and drilling of the soil borings. Elevated % lower explosive limit (LEL) readings were detected in the following locations: Test pit TP-10 (4% LEL) Test pit TP-14 (4% LEL) Boring B-2 (113% LEL) Response Action Plan MAPLE 116519 City of Maplewood Page 2 Boring B-6 (10% LEL) In August 1996, temporary methane monitoring points were also installed in several test pits. Approximately 24 hours after installing the monitoring points, the following % LEL readings were recorded: Test pit TP-10 (4% LEL) Test pit TP-14 (18% LEL) Test pit TP-18 (0% LEL) Test pit TP-20 (15% LEL) Methane monitoring/data logging was conducted in a nearby manhole (CB MH #1). The monitoring was completed on December 16 through December 20, 1998. During this period air samples were automatically collected through the use of a timed peristaltic pump. Grab air samples were also collected from manholes MH-1, MH-2, MH-3, MH-13, MH-14 and CB- 13. No elevated % LEL concentrations were detected during any of the manhole monitoring events. 2.3 Former Response Action Plan A Response Action Plan (RAP) was approved by the MPCA in March 2002. The MPCA Appendix A RAP approval letter is presented in . In general, the RAP proposed to cap the former dump site with street sweepings from the City of Maplewood. The Ramsey- Washington Metro Watershed District Permit for grading at the Site included a provision that grading and fill for capping the dump site should be outside a 100 foot buffer from Beaver Creek. The former RAP included the following activities: Conducting one additional round of ground water monitoring; Abandonment of the monitoring wells, provided that the last sampling round confirms the previous results; Removal and proper disposal or recycling of exposed large debris on the dump surface; Placing a minimum of two feet of clean soil fill over areas where municipal solid waste is exposed and seed with cover vegetation; Installing geo-synthetic lining material and rip-rap along the banks of Beaver Creek to stabilize the creek bed; Placing Street sweeping material at the Site in accordance with MPCA Fact Sheet 4-54; Selective removal of clean topsoil from the dump surface in areas with excess fill material with test pits to ensure that the remaining cover material is at least three feet thick; and Regrading the area immediately east of Beaver Creek so the area slopes toward the creek, maintain at least three feet of cover soil, capping with six inches of topsoil, and revegetating the surface. A majority of the original RAP activities were not completed. The City of Maplewood made a conversion to using more salt for snow and ice control on City streets; therefore using street sweepings to cap the former dump area is no longer a viable option. Response Action Plan MAPLE 116519 City of Maplewood Page 3 3.0 RAP Goal, Objectives and Scope 3.1 RAP Goal The intent of the RAP is to facilitate the closure of the site by preventing direct human contact with surface debris and impacted soil material and to reduce potential of the Beaver Creek bed to be in contact with waste debris. Upon completion of the RAP activities, the City of Maplewood’s goal is to receive a MPCA No Action Letter and site closure. 3.2 RAP Objectives The goal of the RAP will be achieved through reaching the following objectives: Removal and proper disposal or recycling of exposed large debris on the surface; Developing a minimum four foot separation thickness between former municipal solid waste material and the surface. Flow from Beaver Creek will be maintained and directed through an appropriately sized control structure (culvert) through the former dump area to reduce potential contact with waste in the current creek bed. 3.3 Response Actions Response Actions for the Site have been developed to reduce or eliminate the potential for direct contact of environmentally impacted soils and surface waste debris. The Response Actions will be accomplished as described in the following sections. 3.3.1Surface Debris Removal Prior to regrading and importing fill material, exposed debris on the surface will have loose soil removed and be placed in dumpstsers for proper disposal or recycling. Surface debris will be segregated and loaded on-site for transportation to a landfill or recycling facility. 3.3.2Clean Soil Import The City of Maplewood intends to import fill material to the Site in order to cap the site and meet the four foot separation thickness. The proposed Grading Plan for the Site is presented Figure 3 “Grading Plan” as. Depending on the source, the fill may need to be tested for potential contaminants. Imported fill from a commercial pit will not be tested. Fill imported from non-commercial sources will be accepted for use on the site upon documentation from the contractor that the material is clean. The fill area will include a minimum of six inches of topsoil at the surface to aid in the proper revegetation of the area. 3.3.3Beaver Creek Control Structure An appropriately sized control structure (culvert) will be placed in Beaver Creek to maintain adequate water flow and separate the creek bed from potential MSW in the dump area. The culvert is proposed to be approximately 200 linear feet through the former dump area. It is likely that soil correction in the creek bed will need to be completed for geotechnical purposes to provide a stable foundation for the culvert to be placed on. It is anticipated that the only excavation of soils on-site will be in the area of the creek bed were the culvert is to be placed. Soil excavated from the creek bed will be thin spread on-site and will be covered with non-regulated soil material to meet the thickness separation requirement. The culvert will be covered with non-regulated soil material as described in Section 3.4.2. The location of Figure 3 the culvert is presented on . Response Action Plan MAPLE 116519 City of Maplewood Page 4 3.3.4Well Sealing Three ground water monitoring wells remain on the Site. The monitoring wells will be sealed in by a licensed well contractor in accordance with MDH requirements. 3.3.5Revegetation Areas where import fill is placed and/or soil is disturbed will be revegetated with the appropriate native seed mix for the area. 4.0 RAP Implementation RAP Implementation will begin following MPCA approval. 4.1 General Operations Site work will be completed by a contractor(s) selected by the City of Maplewood. Site field work will be performed in accordance with Occupational Safety and Health Administration (OSHA), MPCA, and Minnesota Department of Transportation (MnDOT) regulations. The contractor(s) will be responsible for providing applicable regulatory agencies copies of all applicable permits prior to performing work on-site. The contractor(s) will be responsible for providing appropriately trained personnel during construction activities. An SEH Environmental Scientist will be on-site to provide environmental oversight of construction activities. When available, detailed construction designs will be provided to the MPCA for the following: Beaver Creek control structure design plans and specifications Revegetation plan 4.2 Permits The contractor will be responsible for obtaining and implementing all applicable permits required for excavating impacted soil and transporting, disposing or recycling surface debris materials. The City of Maplewood will obtain a permit(s) to fill designated wetland areas and to divert Beaver Creek through a culvert prior to implementation of the RAP. 5.0 RAP Implementation Report An implementation report will be submitted to the MPCA upon completion of the response actions. The report will be prepared in accordance with VIC Program guidance documents and will include the following: Documentation of construction activities Photographs of construction activities Documentation of waste disposal or recycling Daily field logs Import material analytical if applicable Any changes or modifications to the approved RAP Response Action Plan MAPLE 116519 City of Maplewood Page 5 6.0 Site Health and Safety Plan A site health and safety plan compliant with 29 CFR 1910.120 and 29 CFR 1926.62 will be prepared by SEH staff and maintained onsite during all field oversight activities. 7.0 Contingency Plan Based on the history and previous investigations completed at the site, no other environmental issues are anticipated; however, this portion of the document should serve as guidance should unforeseen environmental issues be encountered during construction. The SEH RAP/CCP and Site Health and Safety Plan will be on-site if environmental issues arise. If any suspicious materials; for example, underground storage tanks, tires, auto parts, stained or odorous soil, batteries, barrels, demolition debris (ex. floor tiles, fiberous insulation, shingles), suspect asbestos containing material, containers, etc. are encountered during construction, remove personnel and equipment from the immediate area and contact Mr. Allen Sunderman, SEH at 612.718.6451 and Michael Thompson, City of Maplewood at 651.249.2403, immediately. The City of Maplewood will then contact the MPCA, or delegate that responsibility to SEH. 8.0 Summary SEH has prepared this Response Action Plan for the City of Maplewood. On behalf of the City of Maplewood, SEH requests that the MPCA review and approve this Response Action Plan. Please also provide a written response to this RAP that is addressed to the City of Maplewood, with a copy sent to SEH. Response Action Plan MAPLE 116519 City of Maplewood Page 6 List of Figures Figure 1 – Site Location Figure 2 – Site Features Figure 3 – Grading Plan Figure Project: SiteLocation Maple 116519 3535 VADNAIS CENTER DR.SiteLocation ST. PAUL, MN 55110 Former Maplewood Dump Site 1 PHONE: (651) 490-2000 PHONE: (651) 490-2150 Maplewood, Minnesota WATTS: 800-325-2055 Date: www.sehinc.com 3/13/12 —W \.. a: H amQ �QJ a: Lid nxz N W Q J O N U W C7 l.- tn O \ U 2 G I.- z tn r — � 0 0 D a J d �r W � ti ti hd P� z as J } F F W ... 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