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Memo/Henn Co Bureau of public Storage• • a METROPOLITAN COUNCIL Mears Park Centre, 230 East Fifth Street, St. Paul, Minnesota 55101 DATE: July 19, 1989 TO: Environmental Resources Committee FROM: Solid Waste Division (Wayne Nelson, 291- 6406) SUBJECT: Hennepin County Bureau of Public Service Storage Facility City of Hopkins Metropolitan Council Referral File No. 14894 -1 Metropolitan Council District 13 INTRODUCTION Hennepin County is seeking a temporary ash storage permit from the Minnesota Pollution Control Agency to use a large county storage building in Hopkins to temporarily store ash from its solid waste incinerator. The storage capacity is urgently needed because the temporary storage facility expected to be permitted later this month at the Woodlake Landfill in Medina is not expected to be operational until about November of this year The incinerator is scheduled to begin operation next month. The temporary storage would occur in the "salt storage building" at the Bureau of Public Service facility in Hopkins. The facility is currently used for storing road maintenance materials including gravel, salt and aggregates. MPCA staff anticipate issuing a Type I ash storage permit effective through December 15, 1989. AUTHORITY TO REVIEW The Metropolitan Council is required by Minn. Stat. 473.823, subd. 3, to issue a permit determination within 60 days of its receipt of a facility permit from the MPCA unless a review extension is granted. The 60 -day period for this review lapses on September 10, -1985. Council approval must be based on consistency with the Solid Waste Management chapter of the Metropolitan Development Guide. Approval may be subject to conditions necessary to satisfy criteria and standards in the policy plan. Disapproval is required if the Council determines that a permit is not in accordance with its policy plan. SUMMARY OF PREVIOUS REFERRALS AND EXPECTATION FOR RELATED SUBMISSIONS o Waste Flow Designation Plan (1985) o Solid Waste Management Master Plan (1987) o EAW for a temporary and possibly permanent (Type II) ash storage facility at Woodlake (MPCA is preparing as RGU) o Temporary ash storage (Type I) permit application (May 1989) -- • NOTIFICATION AND RESPONSE The following entities were notified that the Council has received this permit application for review. o Hennepin County o Hopkins o Hennepin County Soil & Water Conservation District. o Metropolitan Waste Control Commission o Minnesota Dept. of Natural Resources o Minnesota Environmental Quality Board o Minnesota Dept. of Agriculture o Minnesota Dept. of Health Div. of Environmental Health This report was prepared within a week of the above notifications and no responses were submitted during this period. PROJECT DESCRIPTION The Hennepin Energy Resource Company (HERC) Resource Recovery Facility located in downtown Minneapolis is scheduled to begin operations about August 15, 1989. Production is expected to increase each month until normal operating capacity is reached in December 1989. Incoming solid waste during this period is projected at 73,500 tons resulting in 19,845 tons of ash materials. Temporary storage will be- needed until about the beginning of November when a storage cell is completed at the Woodlake Landfill. The temporary storage is proposed within a salt storage shed with a capacity of 20,500 tons. The shed is located approximately in the center of the 40 -acre county public service operations and maintenance facility southwest of US Highway 169 and 3rd Street S. in Hopkins The street address is 320 Washington Ave. S. (See Figure). The ash produced at the HERC incinerator will include scrubber residue (primarily lime) , will be quenched with water, and will be conditioned to remove free liquid and minimize fugutive dust before delivery to the Hopkins facility. Delivery trucks would be weighed at the scale outside the storage building. Maximum delivery volume is projected at 260 tons per day. Deliveries are anticipated in triple -axel end -dump trailers fitted with roll back top covers with a capacity of 20 to 25 tons. When HERC operations achieve designed production capacity, 15 - 20 delivery vehicles are anticipated daily. The facility will serve HERC delivery vehicles exclusively. The routing from downtown Minneapolis will be on MN Highway 55 to south US 169 to west Hennepin County 3 to south 5th Ave. to east 3rd St. S. to the facility. Unloading and storage would occur within the shed which is a steel, plywood and earthen structure that is open on the south side. The shed is -above 2 or u z� i W TC 3rd Street Street South EXISTING BUILDINGS South 200 Feet SITE PLAN OF DEPARTMENT OF PUBLIC WORKS MAIN EQUIPMENT AND STORAGE YARD, HOPKINS Existing Site Access 1 1 w • grade with a bituminous floor surface (4" minimum) . Berms on three sides rise to the roof supports and provide additional protection against storm water run -on into the facility. The structure has no floor drains and the floor slopes toward the southwest corner. A berm and collection device would be installed on the south side of the facility if indoor runoff did occur. The shed and scale are within a 20 -acre section of the site that is fenced and guarded when the access through the scale area is closed. PROJECT REVIEW The following Solid Waste Management Policy Plan /Development Guide criteria are applicable to the proposed Type I facility review: capacity, location, environmental impacts and operations. CAPACITY These criteria are intended to assure that facility sizing will not interfere with any of the priorities in the land disposal development schedule. Development of this interim facility is consistent with the land disposal development schedule. The interim facility will not affect land disposal volumes because the material will be land disposed regardless of whether the interim facility is deployed. The development schedule assumes existing landfill capacity will be available for the disposal of residuals until new disposal facilities are developed. The Guide projects from 1985 through 1990 that 40 percent by weight of all waste handled by reduction /recovery technologies will be returned as residuals still requiring landfilling. LOCATION These criteria are intended to assure that location is consistent with Council land use policies, compatible with metropolitan systems, and compatible with surrounding land uses. The site in Hopkins is within the Metropolitan urban service area and is zoned general industrial. Transportation to and from the facility, will occur on 9 -ton or better road surfaces in vehicles with maximum axle weights of eight and a half tons. Local and collector streets do provide access to the site from County Rd. 3, but these streets traverse a commercial /industrial area. No other metropolitan systems will be affected. The facility is buffered by existing county operations and storage activities that completely surround it Residential and commercial land uses predominate outside the county property. The MPCA, in cooperation with the city of Hopkins and Hennepin County, has scheduled a public informational meeting on August 7, 1989, at 7 00 p.m. in the Hopkins City Hall to address local concerns about the operation. ` The city will conduct a zoning review process that will allow it to influence such factors as hours of operation, monitoring and corrective actions that may be necessary to address operational problems. The facility will • • revert to use for road maintenance storage operations after the ash is loaded back into trailers with front end loaders and removed to the Woodlake Landfill storage facility following its completion. ENVIRONMENTAL IMPACTS These criteria are intended to assure that such facilities are located, designed and operated to prevent air pollution or the discharge of leachate under or beyond site boundaries. Air pollution is very unlikely because the damp ash will be transported and unloaded in covered vehicles and storage areas. Run -on and run -off should be properly controled by the enclosed structure and earthen berms. Regular inspection and management in response to pooling of moisture or fugitive dust should assure that the ash is maintained in a condition that is dry enough not to form leachate and damp enough not to create dust. Litter will not be a consideration because the incineration process destroys it. OPERATIONS These criteria are intended to assure that permit applicants are responsible, the facilities will be controlled both to prevent unauthorized entry and provide for wastes left illegally, and backup service is available in the event of an emergency. Hennepin County has demonstrated a commitment to solid waste management. It has planned and developed waste management facilities consistent with county, regional and state planning requirements. It successfully operates yard waste and household hazardous waste management programs and oversees hauler licensing and hazardous waste regulation at the county level. The facility will be controlled by fencing and access only through the scale operation. Illegal dumping outside the facility will not be a problem because disposal of all the ash residue is covered under contract. The county presently has no backup for this backup arrangement other than to close the HERC facility. The county is negotiating alternative backup arrangements, however, with other parties. No assurance is provided that the stored ash will be promptly removed. The county has an incentive to remove the material to provide space for salt storage during the winter months and MPCA enforcement authority could be relied upon when the permit expires at the end of the year. From a good business management perspective, however, the cost of this activity should be predicted in advance and assessed at the time the cost is incurred. Consequently, a condition should be established requiring that the cost of removal and delivery of the ash to a more permanent disposal location be estimated on a tonnage basis and corresponding amounts be escrowed as the storage activity progresses. IP LUSIONS 1. The proposed Type I facility is consistent with the Solid Waste Management Policy Plan1Development Guide. 2. The facility is consistent with the land disposal development schedule and will not increase the demand for land disposal capacity. 3. The facility is compatible with metropolitan systems. 4. The facility is intended for interim use only during 1989. 5. The facility should have no adverse environmental impacts. f 6. The permit should be conditioned to require that the cost be o f rm oval on and of the ash to a more permanent disposal location tonnage basis and corresponding amounts be escrowed for this purpose as the storage activity progresses. RECOMMENDATION at the Metropolitan Council approve, subject to the following condition, Ili uance of a Type I incinerator ash storage facility permit to Hennepin for temporary storage of MSW incinerator ash at the Hennepin County Bureau of Public Service Storage Facility anent disposal posal location must bemoval and delivery of the ash to a more perm estimated on a tonnage basis and corresponding funds must be escrowed for this purpose as the storage activity progresses. 6