Le Sueur, Minnesota St. Paul, Minnesota Citizen Petition

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1 ENVIRONMENTAL ASSESSMENT WORKSHEET Note to reviewers: The Worksheet (EAW) provides information about a project that may have the potential for significant environmental effects. This EAW was prepared by the Minnesota Pollution Control Agency (MPCA), acting as the Responsible Governmental Unit (RGU), to determine whether an Environmental Impact Statement (EIS) should be prepared. The project proposer supplied reasonably accessible data for, but did not complete the final worksheet. Comments on the EAW must be submitted to the MPCA during the 30-day comment period which begins with notice of the availability of the EAW in the Minnesota Environmental Quality Board (EQB) Monitor. Comments on the EAW should address the accuracy and completeness of information, potential impacts that are reasonably expected to occur that warrant further investigation, and the need for an EIS. A copy of the EAW may be obtained from the MPCA by calling (651) An electronic version of the completed EAW is available at the MPCA Web site 1. Project Title: 2. Proposer: Davisco Foods International 3. RGU: Minnesota Pollution Control Agency Contact Person Jeff Shodean Contact Person Kelly Garvey and Title Maintenance Manager and Title Project Manager Address 719 North Main Street, Box 107 Address 520 Lafayette Road North Le Sueur, Minnesota St. Paul, Minnesota Phone (507) Phone (651) Fax (507) Fax (651) Reason for EAW Preparation: EIS Scoping Mandatory EAW X Citizen Petition RGU Discretion Proposer Volunteered If EAW or EIS is mandatory give EQB rule category subpart number and name: Minn. R subp.18c Mandatory Categories for Wastewater Systems 5. Project Location: County Le Sueur City/Twp Le Sueur SW 1/4 1/4 Section 25 Township 112N Range 26W Attachments to the EAW: Figure 1 General Location; Figure 2 Location Map; Figure 3 Site Plan; Figure 4 Floodway areas; Figure 5 Letter from Minnesota Department of Natural Resources (DNR); and Figure 6 Letter from Minnesota Historical Society. TDD (for hearing and speech impaired only): (651) Printed on recycled paper containing 30% fibers from paper recycled by consumers

2 6. Description: a. Provide a project summary of 50 words or less to be published in the EQB Monitor. Davisco Foods International Company (Company) has proposed to eliminate the discharge of pretreated effluent generated at the Le Sueur Cheese Plant (LCS) which currently discharges to the city of Le Seuer s Wastewater Treatment Facility (WWTF). The Company is proposing to build a new WWTF designed to fully treat the process water which will be discharged to the Minnesota River. The new WWTF will be designed to meet all applicable state rules and federal regulations. b. Give a complete description of the proposed project and related new construction. Attach additional sheets as necessary. Emphasize construction, operation methods and features that will cause physical manipulation of the environment or will produce wastes. Include modifications to existing equipment or industrial processes and significant demolition, removal or remodeling of existing structures. Indicate the timing and duration of construction activities. An evaluation of treatment options in the city of Le Sueur s (City) facility planning process included the treatment of both the City and LSC wastewater at the same facility. Due to costs, the City and LSC determined it was not an option. LSC manufacturers cheese, processes whey and dries food ingredients at their facility located in the City of Le Sueur, Minnesota. Process wastewater from these activities is currently conveyed to a pretreatment plant, which is owned by the City. Approximately 400,000 gallons per day (gpd) of pretreated effluent is currently discharged to the City WWTF for further treatment. The proposed project consists of expanding and upgrading LSC s existing pretreatment facility to provide complete treatment of the LCS process water to meet effluent limitations that will be required in an individual National Pollutant Discharge Elimination System (NPDES) permit. The WWTF will be owned and operated by the LSC (Figure 3). All flow from LSC will be pumped with two new submersible pumps, located at the existing lift station, through the existing eight inch force main to the proposed WWTF. The existing pumps are rated at 350 gallons per minute (gpm) and 40 feet TDH. Larger pumps are needed to pump the design flow to the WWTF. Two stainless steel 500 gpm pumps rated at 55 feet TDH will be required and standby power will be included in the upgrade. All flows to the WWTF will be pumped into an aerated equalization (EQ) basin, constructed of reinforced concrete, adjacent to the existing aeration basins. Tank dimensions are 29 feet by 72 feet by 16.5 feet sidewater depth maximum to provide approximately 12 hours of hydraulic retention time at average flow. Aeration will be provided with two positive displacement blowers each rated at 2,100 cubic feet per minute (cfm) and 8.5 psig, and driven by 125 horsepower motors. Flexible membrane diffusers will be provided for the aeration system. The tank contents will be monitored for ph. Acid or caustic will be added, if necessary, for ph adjustments using the existing chemical pumps. A foam control system consisting of a spray nozzle and anti-foam chemical feed system is provided in the event foam control is required on the surface of the EQ tank. The level in the EQ tank will be allowed to vary by three feet to provide flow and load equalization. Le Sueur, Minnesota 2 Worksheet

3 Submersible variable speed pumps will be used to transfer flow from the EQ basin to a dissolved air floatation (DAF) system. The flow meter will measure the flow to the DAF and will be used to control the speed of the pumps to obtain constant flow to the DAF. The proposed WWTF will have the ability to return sludge to the EQ basin. After the aerated EQ basin, the flow is pumped to a DAF system. The equalized flow will be chemically conditioned with alum and polymer to enhance solids particle flocculation and to remove phosphorus. Solids generated in the EQ will float in the DAF after chemical conditioning and mixing with air entrained recycle flow. Solids skimmed off the DAF will be pumped to the existing sludge storage tank. Waste activated sludge will also be introduced to the DAF for thickening with the floated sludge from the EQ basin. The combination of aerated EQ and the DAF are expected to reduce the biochemical oxygen demand (BOD) by 50 percent, total suspended solids (TSS) by 80 percent, phosphorus by 60 percent and total kjeldahl nitrogen (TKN) by 50 percent. After the DAF, the flow will proceed by gravity to an anoxic selector. The wastewater is mixed with a mixer with return activated sludge to provide an environment for the growth of bacteria for biological phosphorus removal. The selector provides a hydraulic retention time of four and a half hours. A bypass is provided around the selector. The selector will be covered and vented to an odor control system. After the selector, the flow proceeds by gravity to the two existing aeration basins and then south through the basins to the existing flow diversion box, which conveys the flow, via a ten inch pipe, to the final clarifier. The existing aeration system and blowers will be reused. A new flocculation tank will be constructed to accept mixed liquor from the aeration basins. Alum and polymer will be added to the flocculation tank and gentle mixing will be provided for additional phosphorus removal and enhanced floc formation. Flow will then be split between one existing and one new final clarifier. A new return sludge pump (RAS) station will be constructed. Each RAS pump will be variable speed driven and capable of returning 350 gpm/pump. Scum from the clarifiers will continue to flow to the existing scum pump station, to be wasted to the sludge storage tank. Clarifier effluent will flow by gravity to a re-aeration manhole (T900) to raise the dissolved oxygen (DO) to six milligrams per liter (mg/l) or greater, and will be metered and sampled prior to discharge. The effluent from the LSC WWTF will be conveyed to a new outfall structure located along the bank of the Minnesota River due west of the WWTF. The outfall pipe will be approximately 500 feet in length. The discharge pipe from the City WWTF will also discharge at this same outfall structure. Waste sludge from the WWTF will be thickened using the DAF and stored in the existing sludge storage tank. Membrane aeration diffusers and two-75 horsepower, 850 cfm, blowers will be provided to aerate the sludge in the storage tank. A mixing system is currently provided and will be reused. A new odor control system will be provided on the tank vent. Liquid sludge will be pumped to the City WWTF for further processing in their lime stabilization system. Le Sueur, Minnesota 3 Worksheet

4 The design capacity of the proposed WWTF is 500,000 gpd, and the proposed effluent limits are: CBOD 15 mg/l Monthly Average (December-March) CBOD 25 mg/l Monthly Average (April - November) TSS 30 mg/l Monthly Average Phosphorus 1 mg/l Monthly Average Dissolved Oxygen 6 mg/l or greater Mercury 10 nanograms/liter *Carbonaceous Biochemical Oxygen Demand (CBOD) Construction of the new LSC WWTF is scheduled to begin in the fall of It is anticipated that construction will take approximately six to nine months to complete. A flow diagram is attached in Figure 3. During construction of the LSC WWTF the City WWTF will be available to provide full treatment of the LSC wastewater if needed. c. Explain the project purpose; if the project will be carried out by a governmental unit, explain the need for the project and identify its beneficiaries. The new LSC WWTF will provide complete treatment of the process wastewater. The new WWTF will be constructed on land to be owned by the Company. The WWTF will also be owned and operated by the Company. d. Are future stages of this development including development on any outlots planned or likely to happen? Yes No If yes, briefly describe future stages, relationship to present project, timeline and plans for environmental review. e. Is this project a subsequent stage of an earlier project? Yes No If yes, briefly describe the past development, timeline and any past environmental review. 7. Project Magnitude Data Total Project Area (acres) 2.3 or Length (miles) Number of Residential Units: Unattached 0 Attached 0 maximum units per building 0 Commercial/Industrial/Institutional Building Area (gross floor space): total square feet Indicate area of specific uses (in square feet): Office Manufacturing Retail Other Industrial Warehouse Institutional Light Industrial Agricultural Other Commercial (specify) Wastewater Treatment Facility 21,700 square feet Building height 16 feet If over 2 stories, compare to heights of nearby buildings Le Sueur, Minnesota 4 Worksheet

5 8. Permits and approvals required. List all known local, state and federal permits, approvals and financial assistance for the project. Include modifications of any existing permits, governmental review of plans, and all direct and indirect forms of public financial assistance including bond guarantees, Tax Increment Financing and infrastructure. Units Of Government Type Of Application Status MPCA NPDES Permit - Water Quality Submitted to MPCA Transmittal Form with Attachment For Industrial Surface Water Discharge WWTF MPCA Plans/Specifications Approval Plans and specifications will be submitted when complete MPCA Industrial Storm Water Program Storm Water For Industrial Activities Permit Issued - General Storm Water Permit MPCA Construction Storm Water Program Le Sueur County Soil and Water Conservation District, DNR, U.S. Army Corps of Engineers Application For General Storm Water Permit For Construction Activity Minnesota Local/State/Federal Application Forms For Water/Wetland Projects MNG Application will be submitted when design plans are complete Application will be submitted when outfall/discharge pipe design plans are complete City of Le Sueur Building Permit Application will be submitted when design plans are complete Minnesota Dept. of Health - Division of Environmental Health - Engineering Unit Plumbing Plan Review Application Application will be submitted when design plans are complete 9. Land use. Describe current and recent past land use and development on the site and on adjacent lands. Discuss project compatibility with adjacent and nearby land uses. Indicate whether any potential conflicts involve environmental matters. Identify any potential environmental hazards due to past site uses, such as soil contamination or abandoned storage tanks, or proximity to nearby hazardous liquid or gas pipelines. The project site is the current site of the LSC pretreatment facility. The site is surrounded by vacant land on the west and north. The east side is bounded by railroad tracks. The City intends to construct a new WWTF on the property south of LSC. A separate EAW was prepared for the City WWTF and is also currently out on a 30-day public review and comment period. The proposed project is compatible with adjacent land uses. 10. Cover Types. Estimate the acreage of the site with each of the following cover types before and after development: Before After Before After Types 1-8 wetlands 0 0 Lawn/landscaping Wooded/forest 0 0 Impervious Surfaces Brush/grassland 0 0 Other (describe) Cropland Gravel Roadway, 0 0 Basias, and Building TOTAL Le Sueur, Minnesota 5 Worksheet

6 11. Fish, Wildlife, and Ecologically Sensitive Resources. a. Identify fish and wildlife resources and habitats on or near the site and describe how they would be affected by the project. Describe any measures to be taken to minimize or avoid impacts. There are no fish or wildlife resources that would be affected by the project. Wildlife species using this area are limited to species that can inhabit urban land and adapt to human disturbance. Any impact to such wildlife will be minimal. Construction of the improvements will take less than one year to complete. Effluent limits for the new WWTF have been established by MPCA in accordance with State and Federal regulations. These limits have been established to protect the water quality of the Minnesota River. b. Are any state (endangered or threatened) species, rare plant communities or other sensitive ecological resources such as native prairie habitat, colonial waterbird nesting colonies or regionally rare plant communities on or near the site? Yes No If yes, describe the resource and how it would be affected by the project. Indicate if a site survey of the resources has been conducted and describe the results. If the DNR Natural Heritage and Nongame Research program has been contacted give the correspondence reference number. ERDB Describe measures to minimize or avoid adverse impacts. The treated wastewater will be discharged to the Minnesota River. The DNR Natural Heritage and Nongame Research Program were contacted. The results of the Minnesota Natural Heritage data base indicated that there were ten occurrences of rare species or natural communities within a one mile radius of the proposed project. It is not expected that any impacts will occur based on the nature and location of the project. Preliminary effluent limits for the new WWTF have been established in accordance with State and Federal regulations. These limits have been established to protect the use classification for the Minnesota River identified in Minn. R. ch The use classifications for this receiving body are: 2B Water which should permit the propagation and maintenance of a healthy community of cool or warm water sport or commercial fish and their related habitat. 3B Industrial consumption 4A Irrigation 4B Livestock and wildlife watering 5 Aesthetics and navigation 6 Other uses The new outfall pipe will not impact woodlands or wetlands. There are no designated wetlands in the vicinity of project site or along the outfall pipe route. The outfall pipe will be constructed across land that was recently a cropped corn field. At this time the field is fallow. The Minnesota River is not classified as scenic or recreational in the vicinity of the project. Le Sueur, Minnesota 6 Worksheet

7 12. Physical Impacts on Water Resources. Will the project involve the physical or hydrologic alteration (dredging, filling, stream diversion, outfall structure, diking, and impoundment) of any surface waters such as a lake, pond, wetland, stream or drainage ditch? Yes No If yes, identify water resource affected. Describe alternatives considered and proposed mitigation measures to minimize impacts. Give the DNR Protected Waters Inventory (PWI) number(s) if the water resources affected are on the PWI. An outfall structure will be constructed on the bank of the Minnesota River. An outfall pipe will be extended from the LSC WWTF and a second outfall pipe will be extended from the City WWTF to the common outfall structure. The outfall structure design has not been completed. It is anticipated that the structure will consist of concrete wing walls to protect the pipes and a concrete splash pad below the pipe invert. The structure will not be large enough to adversely impact the river. A General Storm Water Permit for construction activity will be obtained and the contractor will be required to follow the permit requirements. Proper soil erosion Best Management Practices (BMP) will be implemented during construction to minimize impacts. The National Wetland Inventory does not show any wetlands in the project area. The outfall pipe will extend through the 100 year floodway, as mapped by the Federal Emergency Management Agency (FEMA) (Figure 4). 13. Water Use. Will the project involve installation or abandonment of any water wells, connection to or changes in any public water supply or appropriation of any ground or surface water (including dewatering)? Yes No If yes, as applicable, give location and purpose of any new wells; public supply affected, changes to be made, and water quantities to be used; the source, duration, quantity and purpose of any appropriations; and unique well numbers and DNR appropriation permit numbers, if known. Identify any existing and new wells on the site map. If there are no wells known on site, explain methodology used to determine. 14. Water-related land use management districts. Does any part of the project involve a shoreland zoning district, a delineated 100-year flood plain, or a state or federally designated wild or scenic river land use district? Yes No If yes, identify the district and discuss project compatibility with district land use restrictions. Flood Plain: As shown on the FEMA map, the 100 year floodway encroaches at the northwest corner of the WWTF site. No structures will be built in the floodway. (Figure 4) The effluent pipe and outfall will be constructed within the floodway. The pipe will be buried and the outfall structure will be set into the bank of the Minnesota River. These facilities will not cause obstruction in the floodway. 15. Water Surface Use. Will the project change the number or type of watercraft on any water body? Yes No If yes, indicate the current and projected watercraft usage and discuss any potential overcrowding or conflicts with other uses. 16. Erosion and Sedimentation. Give the acreage to be graded or excavated and the cubic yards of soil to be moved: 0.5 acres; 5,250 cubic yards. Describe any steep slopes or highly erodible soils and identify them on the site map. Describe any erosion and sedimentation control measures to be used during and after project construction. Le Sueur, Minnesota 7 Worksheet

8 A general Storm Water Permit for construction activities will be obtained from MPCA. A Storm Water Pollution Prevent Plan (SWPPP) that includes BMP to minimize the discharge of pollutants in stormwater runoff from the site will be designed and implemented during construction. The SWPPP will include the following elements: a. Temporary erosion prevention and sediment control BMP s. b. Permanent erosion prevention and sediment control BMP s. c. Permanent storm-water management system. d. Pollution prevention management measures. The SWPPP will be shown on the project plans and the requirements will be described in the project specifications. The SWPPP will also be described in the application for the general Storm Water Permit for construction activity. 17. Water Quality Surface-water Runoff. a. Compare the quantity and quality of site runoff before and after the project. Describe permanent controls to manage or treat runoff. Describe any storm-water pollution prevention plans. The quantity and quality of site runoff will not change significantly. The project site is currently developed as a wastewater pretreatment plant. The amount of impervious surfaces will increase by approximately 0.1 acre. Grass and landscaping will be provided on the site to manage runoff. b. Identify routes and receiving water bodies for runoff from the site; include major downstream water bodies as well as the immediate receiving waters. Estimate impact runoff on the quality of receiving waters. There are no storm sewers in the vicinity of the site. The site drains from the east to the west. The Minnesota River is approximately 350 feet west of the site. The amount of runoff from the site will be minimal and very little runoff will actually discharge to the river. Therefore, there will be no impact from surface-water runoff on the Minnesota River. 18. Water Quality Wastewater. a. Describe sources, composition and quantities of all sanitary, municipal and industrial wastewater produced or treated at the site. Only process wastewater from the cheese manufacturing process will be treated at the WWTF. Sanitary wastewater from the LSC WWTF will be discharged to the City s collection system and treated at the City WWTF. The design criteria for the new WWTF is as listed below. Current average day flows are approximately 400,000 gpd. The design capacity of the proposed WWTF is 500,000 gpd, which allows for future cheese manufacturing expansion, if ever needed, of approximately 25 percent. Le Sueur, Minnesota 8 Worksheet

9 Parameter Flow, mgd Average Day (equalized) Maximum 30-Day Maximum Day Raw BOD, pounds (lbs.)/day 2,000 mg/l Maximum 30-Day Maximum Day Raw TSS, lbs./day 330 mg/l Maximum 30-Day Maximum Day TKN, lbs./day 90 mg/l Maximum 30-Day Maximum Day Phosphorus, lbs./day Average Maximum 30-Day Maximum Day Design Criteria ,340 12,510 16,680 1,376 2,064 2, b. Describe waste treatment methods or pollution prevention efforts and give estimates of composition after treatment. Identify receiving waters, including major downstream water bodies, and estimate the discharge impact on the quality of receiving waters. If the project involves on-site sewage systems, discuss the suitability of site conditions for such systems. The waste treatment methods were previously described in Items 6.b. The proposed effluent limits are: CBOD 15 mg/l Monthly Average (December - March) CBOD 25 mg/l Monthly Average (April - November) TSS 30 mg/l Monthly Average Phosphorus 1 mg/l Monthly Average Dissolved Oxygen 6 mg/l or greater Mercury 10 ng/l Monthly Average Monitoring will be required in the NPDES permit for chloride, potassium and sodium. The Company was also required to do a nondegradation analysis in accordance with Minn. R. ch Nondegradation Review for all Waters of the State. The proposed design flow for the project will be greater than 200,000 gpd. A flow increase of this size is considered to be significant as defined in Minn. R. ch In accordance with the rule, the Company is required to submit additional information for the MPCA review before effluent limitations can be assigned. LSC submitted a nondegradation analysis for MPCA review. The review was approved and preliminary effluent limitations were established and are listed in the above table. Le Sueur, Minnesota 9 Worksheet

10 All effluent limitations have been developed in accordance with State Rules and Federal regulations. These limits have been established to protect the use classification specified in Minn. R. ch for the Minnesota River. c. If wastes will be discharged into a publicly owned treatment facility, identify the facility, describe any pretreatment provisions and discuss the facility s ability to handle the volume and composition of wastes, identifying any improvements necessary. Treated effluent from the new LSC WWTF will be discharged directly to the Minnesota River. d. If the project requires disposal of liquid animal manure, describe disposal technique and location and discuss capacity to handle the volume and composition of manure. Identify any improvements necessary. Describe any required setbacks for land disposal systems. Not Applicable. 19. Geologic hazards and soil conditions. a. Approximate depth (in feet) to Ground water: 22 feet minimum; average. Bedrock: minimum; >26 feet average. Describe any of the following geologic site hazards to ground water and also identify them on the site map: sinkholes, shallow limestone formations or karst conditions. Describe measures to avoid or minimize environmental problems due to any of these hazards. Describe any of the following geologic site hazards to ground water and also identify them on the site map: sinkholes, shallow limestone formations or karst conditions. Describe measures to avoid or minimize environmental problems due to any of these hazards. Not Applicable. b. Describe the soils on the site, giving SCS classifications, if known. Discuss soil granularity and potential for groundwater contamination from wastes or chemicals spread or spilled onto the soils. Discuss any mitigation measures to prevent such contamination. The soils on the site consist of surficial top soil underlain by sand and gravel alluvium. The top soil is approximately two feet thick and consists of clayey and lean clay with sand. The main geologic deposit consists of sand and gravel, coarse alluvium. A geotechnical exploration program was conducted in 1992 prior to construction of the pre-treatment facility. The program included conducting three borings. It was determined that the site conditions are suitable for the construction of the proposed project. Site preparation and foundation design recommendations were provided. Those recommendations will be incorporated into the project design. All chemicals used at the site will be stored inside the operations building. Secondary containment will be provided inside the building. Le Sueur, Minnesota 10 Worksheet

11 20. Solid Wastes, Hazardous Wastes, Storage Tanks. a. Describe types, amounts and compositions of solid or hazardous wastes, including solid animal manure, sludge and ash, produced during construction and operation. Identify method and location of disposal. For projects generating municipal solid waste, indicate if there is a source separation plan; describe how the project will be modified for recycling. If hazardous waste is generated, indicate if there is a hazardous waste minimization plan and routine hazardous waste reduction assessments. There are no hazardous wastes or ash produced during construction and operation of the treatment facilities. Biosolids production from the treatment facilities is estimated to be 6,900 lbs. per day at four percent solids or 20,700 gpd. The biosolids will be aerated and stored in an existing Aquastore tank (glass lined, bolted steel). The biosolids will be pumped to the City WWTF to be dewatered and lime stabilized to produce a Class A biosolids. The dewatered and stabilized product will be land applied on permitted, local, agricultural land. Construction type solid wastes will be generated during the construction of the WWTF. The Contractor will be responsible for the proper disposal of those wastes. b. Identify any toxic or hazardous materials to be used or present at the site and identify measures to be used to prevent them from contaminating groundwater. If the use of toxic or hazardous materials will lead to a regulated waste, discharge or emission, discuss any alternatives considered to minimize or eliminate the waste, discharge or emission. Not applicable. c. Indicate the number, location, size and use of any above or below ground tanks to store petroleum products or other materials, except water. Describe any emergency response containment plans. Not applicable. 21. Traffic. Parking spaces added: 0 Existing spaces (if project involves expansion): N/A Estimated total average daily traffic generated: N/A Estimated maximum peak hour traffic generated (if known) and its timing: N/A Provide an estimate of the impact on traffic congestion affected roads and describe any traffic improvements necessary. If the project is within the Twin Cities metropolitan area, discuss its impact on the regional transportation system. 22. Vehicle-related Air Emissions. Estimate the effect of the project s traffic generation on air quality, including carbon monoxide levels. Discuss the effect of traffic improvements or other mitigation measures on air quality impacts. Note: If the project involves 500 or more parking spaces, consult EAW Guidelines about whether a detailed air quality analysis is needed. Not applicable. Le Sueur, Minnesota 11 Worksheet

12 23. Stationary Source Air Emissions. Describe the type, sources, quantities and compositions of any emissions from stationary sources of air emissions such as boilers, exhaust stacks or fugitive dust sources. Include any hazardous air pollutants (consult EAW Guidelines for a listing), any greenhouse gases (such as carbon dioxide, methane, and nitrous oxides), and ozone-depleting chemicals (chlorofluorocarbons, hydrofluorocarbons, perfluorocarbons or sulfur hexafluoride). Also describe any proposed pollution prevention techniques and proposed air pollution control devices. Describe the impacts on air quality. Not applicable. 24. Odors, noise and dust. Will the project generate odors, noise or dust during construction or during operation? Yes No If yes, describe sources, characteristics, duration, quantities or intensity and any proposed measures to mitigate adverse impacts. Also identify locations of nearby sensitive receptors and estimate impacts on them. Discuss potential impacts on human health or quality of life. (Note: fugitive dust generated by operations may be discussed at item 23 instead of here.) Noise and dust will be generated during the project construction. The work hours will be limited to week days and day light hours to reduce impacts. The two sources of odor at the completed WWTF are the selector tank and the sludge storage tank. Odor control will be provided as follows: The selector tank will be covered with precast planks. A passive activated carbon odor control system will be provided for the selector. The sludge storage tank will be aerated to keep it aerobic. Off-gas will either pass through a carbon scrubber or will become inlet air to the aeration tank blowers, which will bubble it through the aeration tank for odor scrubbing. Noise control will be provided as follows: a. New positive displacement blowers will have ventilated sound enclosures. b. All other equipment will be located inside the buildings. c. The treatment process will not generate dust. 25. Nearby resources. Are any of the following resources on or in proximity to the site? a. Archaeological, historical, or architectural resources? Yes No b. Prime or unique farmlands or land within an agricultural preserve? Yes No c. Designated parks, recreation areas, or trails? Yes No d. Scenic views and vistas? Yes No e. Other unique resources? Yes No If yes, describe the resource and identify any project-related impacts on the resources. Describe any measures to minimize or avoid adverse impacts. Le Sueur, Minnesota 12 Worksheet

13 26. Visual impacts. Will the project create adverse visual impacts during construction or operation? Such as glare from intense lights, lights visible in wilderness areas and large visible plumes from cooling towers or exhaust stacks? Yes No If yes, explain. 27. Compatibility with plans and land use regulations. Is the project subject to an adopted local comprehensive plan, land use plan or regulation, or other applicable land use, water, or resource management plan of a local, regional, state or federal agency? Yes No If yes, describe the plan, discuss its compatibility with the project and explain how any conflicts will be resolved. If no, explain. The proposed project is compatible with the Wastewater Treatment Facilities Plan for the City of Le Sueur, Bolton & Menk, Inc. April 2001 and the Le Sueur County Comprehensive Local Water Management Plan (1997). 28. Impact on infrastructure and public services. Will new or expanded utilities, roads, other infrastructure or public services be required to serve the project? Yes No If yes, describe the new or additional infrastructure or services needed. (Note: any infrastructure that is a connected action with respect to the project must be assessed in the EAW; see EAW Guidelines for details.) 29. Cumulative impacts. Minn. R , subp. 7, item B requires that the RGU consider the cumulative potential effects of related or anticipated future projects when determining the need for an environmental impact statement. Identify any past, present or reasonably foreseeable future projects that may interact with the project described in this EAW in such a way as to cause cumulative impacts. Describe the nature of the cumulative impacts and summarize any other available information relevant to determining whether there is potential for significant environmental effects due to cumulative impacts (or discuss each cumulative impact under appropriate item(s) elsewhere on this form). The upgraded LSC WWTF will be designed and operated in accordance with MPCA requirements. Effluent limits have been established by MPCA to protect the water quality of the Minnesota River. Appropriate regulatory permits required for project construction and operation will be obtained and the requirements of those permits will be followed. 30. Other Potential Environmental Impacts. If the project may cause any adverse environmental impacts not addressed by items 1 to 28, identify and discuss them here, along with any proposed mitigation. Not applicable. 31. Summary of issues. List any impacts and issues identified above that may require further investigation before the project is begun. Discuss any alternatives or mitigative measures that have been or may be considered for these impacts and issues, including those that have been or may be ordered as permit conditions. Anticipated impacts have been identified in this Worksheet. Le Sueur, Minnesota 13 Worksheet

14 RGU CERTIFICATION. I hereby certify that: The information contained in this document is accurate and complete to the best of my knowledge. The EAW describes the complete project; there are no other projects, stages or components other than those described in this document, which are related to the project as connected actions or phased actions, as defined at Minn. R , subps. 9b and 60, respectively. Copies of this EAW are being sent to the entire EQB distribution list. Name and Title of Signer: Beth G. Lockwood, Supervisor, Environmental Review Unit Operations and Environmental Review Section Regional Environmental Management Division Date: The format of the Worksheet was prepared by the staff of the Environmental Quality Board at Minnesota Planning. For additional information, worksheets or for EAW Guidelines, contact: Environmental Quality Board, 658 Cedar St., St. Paul, MN 55155, , or at their Web site Le Sueur, Minnesota 14 Worksheet