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8.e) 2014 Scandia Mine AOP ApplicationJanuary 2014 TILLER CO RPO RAT 10N' 2014 APPLICATION FOR THE ANNUAL OPERATORS PERMIT Scandia, MN Consulting Civil Engineers Sunde Engineering, PLLC. 10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100 Phone: (952) 881-3344 • Fax: (952) 881-1913 • E -Mail: info&sundecivil.com APPLICATION FOR ANNUAL OPERATORS PERMIT TILLER CORPORATION SAND AND GRAVEL MINING OPERATION CITY OF SCANDIA WASHINGTON COUNTY, MINNESOTA January 2014 I. INTRODUCTION The following Annual Operators Permit (AOP) application is submitted on behalf of Tiller Corporation (Tiller) in compliance with the City of Scandia's Ordinance No. 103 and Chapter 4 of the Development Code: Mining and Related Activities Regulations, Section 6, adopted by the City of Scandia on August 28, 2007. Tiller operates a gravel mining and processing operation including hot -mix asphalt (HMA) production within the City of Scandia. The site has been actively mined since at least 1966. Prior to the incorporation of Scandia in 2006, New Scandia Township and Washington County were the permitting authorities. The City of Scandia adopted a resolution on May 20, 2008 issuing a Conditional Use Permit (CUP) for the site. II. ANNUAL REPORT A. Operating Conditions The site operates in accordance with operating conditions regulated by Section 7 of the Scandia Ordinance 103. Setbacks: No mining, stockpiling or land disturbance activities, with the exception of screening activities, are proposed to take place within the setback areas. Minimum setback areas are maintained as follows: a) 50 feet from an adjoining property line b) 200 feet from an occupied structure existing on May 20, 2008. c) 100 feet from any contiguous property subdivided into residential lots of 5 acres or less d) 100 feet from any road right-of-way. 2. Fencing: The majority of the site is fenced with 3 strand wire fencing except where prohibited due to topography, heavy vegetation and wetlands. There are locking metal gates at both entrances to the site. 3. Hours of operation: The site is operated from 7:00 a.m. to 7:00 p.m. Monday through Friday except holidays. Extended hours may be required periodically for situations such as emergencies, accelerated work schedules or weather delays. In accordance with procedures set forth in Ordinance No. 103, extended hours Tiller Corporation Page 1 2013 Annual Operators Permit Application January 24, 2013 were requested and approved in 2013. As part of the request for extended hours, Tiller asked to be notified if the City received any complaints regarding the extended hours of operations. Tiller did not receive any notice of complaints from the City as a result of the extended hours. Extended hours were approved for the operation of the asphalt plant, excluding trucking operations on Sunday, October 13, 2013 from 3:00 p.m. to 7:00 p.m. in order to supply HMA to the County Road 7 Project. 4. Screening: Screening berms, wooded buffer areas and agricultural fields separate the mining activity from surrounding properties. A large number of trees have been planted in the past to screen site activities. Processing and stockpiling operations are conducted in recessed portions of the site to minimize visibility. Screening berm construction or modifications are not anticipated during 2014. 5. Dust control: Major haul roads are hard surfaced and some roads are covered with asphalt millings as dust control measures. A water truck is used to water unpaved portions of the site to control dust. During periods of increased trucking activity, calcium chloride or other approved dust suppressants is applied to provide additional dust control. These practices will continue throughout the 2014 mining season. 6. Noise: All activities are conducted so as to be in accordance with all Federal, State and City noise standards. 7. Depth of excavation: Depth of excavation will not exceed fifty feet below the water table. 8. Site clearance: Site clearing activities did not occur during 2013. Clearing activity is not anticipated in 2014. 9. Appearance/condition: All buildings, plants and equipment at the site are maintained in a neat condition. Weeds and other unsightly or noxious vegetation are controlled as necessary to preserve the appearance of the reclaimed areas. 10. Sanitary Facilities: The scale area is served by an individual sewage treatment system. Portable sanitary facilities are provided in the operating areas as required by the Mine Safety and Health Administration. 11. Waste Disposal: Waste generated from the operation is disposed of in accordance with Federal, State and City requirements. 12. Water Quality Monitoring: A plan for groundwater monitoring has been developed and approved in conjunction with the monitoring wells placed in 2008 and the CUP permitting process. Groundwater monitoring was conducted in 2013 and the results were submitted to the City. Water level data is summarized on Table 1 with an associated graph and water quality data is summarized on Table 2. Tiller Corporation Page 2 2013 Annual Operators Permit Application January 24, 2013 13. Fuel and Chemical Storage: All fuel and chemicals stored on site are stored in accordance with Federal and State standards. On-site fuel storage consists of a 1,000 -gallon above -ground storage tank which is located within a concrete secondary containment area and a five hundred gallon above -ground double walled tank located next to the standby electrical generator. When production or reclamation crews are present, an additional 1,000 -gallon double walled tank is brought to the site and used to fuel the respective equipment. All asphalt cement storage tanks are above -ground. These tanks consist of two 40,000 gallon tanks and one 20,000 gallon tank. There is also a 20,000 gallon above -ground used oil storage tank. The used oil is utilized as an alternative fuel supply for the HMA plant. All tanks are within the secondary containment area and are registered with MPCA's Storage Tank Program. MPCA Site ID 51999 is for the HMA plant and MPCA Site ID 55016 is for the sand and gravel operation. Small amounts of chemicals utilized by the QM Lab are regulated by Washington County under United States Environmental Protection Agency (EPA) rules. EPA ID Number MND 981 953 417 has been issued for the site which is classified as a Very Small Quantity Generator. 14. Contingency Response Plan: The site operates under a SPCC Plan which is on file with the City of Scandia. 15. Added Provisions: The operator will comply with other such reasonable requirements that the City may find necessary to adopt for the protection of health, safety and welfare and/or prevention of nuisance. 16. Processing: The site operates permanent processing equipment as defined by Ordinance No. 103 in accordance with all Federal, State and City air and water quality and noise standards. Processing equipment is screened from view from other properties and adjacent roads. Portable crushing equipment is placed on the floor of the facility and setbacks per Ordinance No. 103 are maintained between the processing equipment and the property lines. 17. Recycling: Recycling activity at the facility meets all applicable standards contained in Section 7.1 (1) of Ordinance No, 103. Approximately 36,000 tons of Recycled Asphalt Products (RAP) and recycled concrete were processed in 2013. Processed RAP is used in asphalt production and recycled concrete is sold in various aggregate products. 18. Trucking Operations: The site has access to County Road 15 (Manning Trail N.) and County Road 91 (Lofton Avenue N.). These are paved 9 ton roads. 19. Asphalt Plants: The site operates a permanent HMA plant and the plant was in operation at the time the City adopted its mining ordinance. Therefore the plant may expand in the future subject to the setbacks set forth in Section 7.1(1) of Ordinance No. 103. The plant operates in accordance with all Federal, State, and City air, water and noise quality standards. Tiller Corporation Page 3 2013 Annual Operators Permit Application January 24, 2013 B. Compliance with Conditions of the CUP 1. Updated Copy of Application Material: A completed bound book that includes all of the information and plans submitted to the City during the CUP process was previously submitted and is on file at the City. 2. Watershed District Permit: A Watershed District Permit was obtained for the site and was previously submitted to the City. 3. Monitoring Wells: All required monitoring wells have been installed. 4. Groundwater Monitoring Plan: A monitoring plan with protocols is on file with the City. 5. Excavation Below Water Table: In 2013, excavation into the groundwater table occurred in order to produce products for the asphalt plant that require sands that are characteristic of the deposit as it extends into the groundwater table. Excavation occurred to an approximate depth of 15 to 20 feet into the groundwater table. Excavation into the groundwater table is not likely in 2014. Water level data is collected on an on-going basis and submitted annually to the City (see Table 1). 6. Production Well Records: Records of the production well are kept. They will be provided to the City upon request. 7. Groundwater Analysis: Groundwater samples were analyzed for DRO as indicated in the groundwater monitoring plan (see Table 2). Results have been supplied to the City. Currently, no gasoline is stored on site. If gasoline is stored on site in the future, GRO will also be added to the analyte list. 8. MN County Well Index: A Figure which illustrates the site and MN County Index wells is on file at the City. 9. Setback from Proposed Lake: The asphalt plant and related structures will be setback at least 100 feet from the edge of the proposed water body that will be created as part of mining operations. 10. Lake Depth: The maximum excavation into the water table will be no more than 50 feet. 11. Truck Hauling Signs: Washington County has posted Lofton and Manning Avenues per their requirements. Tiller has posted signs on 218`" Street per City of Scandia requirements. 12. Lofton/Hwy 97 Intersection: Tiller Corporation restricts importing add -rock from Lofton Ave. N. during non -daylight hours as defined in our CUP. 13. 228th Street Sign: Tiller Corporation has posted a sign at the Lofton Ave. N. exit that restricts trucks from using 228th Street. Tiller Corporation Page 4 2013 Annual Operators Permit Application January 24, 2013 14. Reclamation and Sequencing Plan: An updated reclamation plan and sequencing plan is on file with the City. Current reclamation progress is indicated on the Site Plan submitted with the AOP application. C. Annual Activity 1. Amount of material removed from the site: Approximately 180,500 tons of material was removed in 2013. 2. Amount of add -rock brought onto the site: Approximately 83,500 tons of Class C add -rock and approximately 38,000 tons of Class A and Class B add -rock was imported to the site in 2013. 3. Amount of recycled asphalt brought to the site: Approximately 40,000 cubic yards of asphalt for recycling was imported to the site in 2012. 4. Amount of recycled concrete brought to the site: Approximately 15,000 cubic yards of concrete for recycling was imported to the site in 2012. 5. Area reclaimed and type of reclamation: Reclamation activities in 2013 were limited. Suitable reclamation fill material was accepted at the Site in preparation for ongoing reclamation. Ongoing reclamation activities are anticipated in the southern portion of the Site near 218th St. N. during 2014. This area is shown on the Site Plan. 6. Average number of trips hauling material to and from the site per day for the season: The average number of trucks travelling to and from the site per day in 2013 was approximately 137 trucks per day. D. Description of operating conditions planned for the coming year: During the 2014 mining season, the site will continue to operate as it has in the past. The mining operation includes the removal of overburden, excavation of sand and gravel, crushing, washing, screening, stockpiling, and recycling of concrete and asphalt products. Portable crushing and screening plants are brought to the site periodically and material is excavated, processed, and stockpiled. Hot -mix asphalt is produced and sold throughout the construction season and add rock materials are delivered to the site as needed. The 2014 production schedule does not anticipate processing occurring during the 2014 mining season. However, if market demand exceeds forecasts, there may be a need for additional excavation and processing. The exact area of excavation will depend on the required gradation and if necessary mining is expected to occur in the active mine area as indicated on the Site Plan. Site Plan: A Site Plan is attached which illustrates the expected active mining area in 2014, the stockpile and processing area, and reclaimed areas. Tiller Corporation Page 5 2013 Annual Operators Permit Application January 24, 2013 Aerial Photo: An aerial photo is attached which illustrates the active mining area in 2014, the stockpile and processing area and reclaimed areas. Reclamation: There were limited reclamation activities in 2013. Topsoil material suitable for reclamation was accepted at the Site and placed aside for future use. There are limited reclamation activities anticipated for the 2014 operating season. If suitable reclamation fill materials are accepted at the Site they will be placed in the southern portion of the Site near 218th St. N. indicated as the 2014 Reclamation Activity area. This area is shown on the Site Plan. As mining progresses to the perimeter of the mining area in the future, then reclamation; consisting of sloping, backfilling and establishment of vegetation can occur. Operating Conditions for 2014: The 2014 production schedule does not anticipate processing occurring during the 2014 mining season. However, if market demand exceeds forecasts, there may be a need for additional excavation and processing. The exact area of excavation will depend on the required gradation and if necessary mining is expected to occur in the active mine area as indicated on the Site Plan. E. Inspection: The City conducts an annual inspection of the site. The last inspection occurred on October 24, 2013. III. CERTIFICATION I certify that the plans, specifications or reports for the above described facility were prepared by me or under my direct supervision and that I am a duly Registered Professional Engineer under the laws of the State of Minnesota. Kirsten Pauly Date: January 24, 2014 Reg. No. 21842 Tiller Corporation Page 6 2013 Annual Operators Permit Application January 24, 2013 Table 1: Groundwater Elevations for Scandia Scandia #741 Groundwater Elevations Groundwater elevation levels are recorded in feet above mean sea level NM=Not Measured (due to obstruction) MW-2Taken out of service 6/21/2011 •, - 11/20/2013 912.88 912.89 914.35 914.20 911.70 915.74 10/25/2013 912.98 913.03 914.50 914.30 911.80 915.83 913.91 9/26/2013 913.00 913.05 914.52 914.29 911.81 915.88 8/27/2013 913.17 913.23 914.66 914.43 911.98 916.03 7/25/2013 913.19 913.29 914.75 914.41 912.06 916.09 6/25/2013 913.17 913.17 914.66 914.18 911.95 915.98 5/23/2013 912.92 912.94 914.45 913.92 911.62 915.79 913.99 4/25/2013 912.90 912.90 914.43 913.88 911.60 915.78 12/5/2_0_1_2 912.93 912.99 914.45 914.28 911.70 915.83 10/25/2012 913.14 913.19 914.64 914.50 911.98 916.01 914.17 9/26/2012 913.25 913.29 914.78 914.57 912.03 916.16 9/5/2012 913.44 913.48 914.94 914.83 912.28 916.31 7/26/2012 913.71 913.74 915.22 914.89 912.50 916.52 6/26/2012 913.67 913.67 915.12 914.89 912.50 916.46 5/22/2012 913.37 913.38 914.92 914.61 912.22 916.25 4/23/2012 913.22 913.22 914.69 914.50 912.07 916.07 914.13 3/29/2012 913.26 913.27 914.78 914.53 912.09 916.14 11/10/2011 913.74 913.78 915.19 914.99 912.55 916.55 10/3/2011 913.78 913.83 915.27 915.00 912.60 916.62 914.74 9/8/2011 913.78 913.81 915.29 914.90 912.59 916.61 8/5/2011 913.71 913.72 915.24 914.56 912.44 916.55 7/13/2011 6/21/2011 6/6/2011 5/6/2011 4/7/2011 11/23/2010 10/19/2010 9/14/2010 8/9/2010 7/6/2010 6/7/2010 4/27/2010 11/5/2009 10/21/2009 9/10/2009 8/6/2009 913.30 913.13 913.06 912.70 912.46 912.29 912.46 912.37 912.37 912.47 912.39 912.51 913.14 913.17 913.28 913.28 913.36 913.19 913.10 912.74 912.48 912.32 912.45 912.38 912.38 912.46 912.41 912.53 913.15 913.17 913.30 913.39 914.83 914.65 914.52 914.16 913.97 913.84 913.98 913.91 913.92 NM 913.94 914.03 914.70 914.72 914.85 914.88 914.34 914.14 913.97 913.69 913.49 913.47 913.62 913.55 913.56 913.57 913.65 913.77 914.37 914.50 914.55 914.70 912.07 911.97 911.89 911.53 911.22 911.02 911.24 911.11 911.12 911.19 911.17 911.28 911.89 911.93 912.04 912.15 916.17 915.99 915.88 915.53 915.35 915.18 915.34 915.23 915.22 915.28 915.30 915.42 916.07 916.08 916.22 916.27 916.13 916.02 915.68 915.50 915.32 915.46 915.36_ 915.35 915.40 915.43 915.54 916.14 916.17 916.31 916.35 914.18 914.30 6/11/2009 913.55 913.58 915.08 914.83 912.36 916.49 916.60 5/18/2009 913.67 913.70 915.19 914.94 912.51 916.61 916.69 4/6/2009 10/30/2008 913.79 914.35 913.81 914.37 915.35 915.87 915.04 915.60 912.60 913.13 916.78 917.31 916.86 917.37 9/16/2008 914.51 914.57 916.06 915.81 913.28 917.48 917.54 8/7/2008 914.60 914.65 916.20 915.80 917.60 917.65 7/9/2008 914.54 914.58 916.13 915.68 917.55 917.61 6/9/2008 914.44 914.50 915.99 915.53 917.44 917.51 5/14/2008 914.29 914.34 915.38 917.29 917.37 5/6/2008 914.26 914,31 3/28/2008 914.07 914.11 2/22/2008 914.16 914.18 1/9/2008 914.30 NM 12/12/2007 914.48 NM 11/8/2007 914.70 914.74 10/11/2007 914.64 914.68 9/11/2007 914.60 914.64 7/19/2007 914.77 914.82 6/13/2007 914.85 914.91 5/2/2007 915.06 915.11 9/6/2006 915.87 915.90 Tiller Corporation Page 7 2013 Annual Operators Permit Application January 24, 2013 The approved groundwater monitoring plan requires reading of water levels spring summer and fall. Tiller Corporation has taken water levels more frequently, but may not continue to do so in the future, but at minimum water levels will be read spring, summer, and fall. Tiller Corporation Page 8 2013 Annual Operators Permit Application January 24, 2013 Table 2: Water Quality Monitoring Results TABLE 2 Water Quality Monitoring Results Potable Well 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND ND ND ND ND mg/I Total Suspended Solids ND 161 mg/I Nitrogen, Ammonia 0.18 mg/I Nitrogen, Ammonia 0.051 mg/I Phosphorous 0.65 0.13 mg/I Phosphorous ND 0.151 0.0941 0.391 0.11 mg/I Production Well 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND ND ND ND ND mg/I Total Suspended Solids ND 161 mg/I Nitrogen, Ammonia 0.18 mg/I Nitrogen, Ammonia 0.053 mg/I Phosphorous 0.65 0.13 mg/I Phosphorous ND 0.151 0.0941 0.391 0.11 mg/I PZ -3 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND ND ND ND ND mg/I Total Suspended Solids ND Total Suspended Solids 102 161 mg/I Nitrogen, Ammonia 0.18 mg/I Nitrogen, Ammonia 0.048 mg/I Phosphorous 0.65 0.13 mg/I Phosphorous mg/I PZ -4 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND NO ND ND ND mg/I Total Suspended Solids 102 161 65.3 942 46.4 mg/I Nitrogen, Ammonia 0.048 0.15 0.041 0.14 0.13 mg/I Phosphorous NDI 0.151 0.0941 0.391 0.11 mg/I PZ -5 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND NO ND ND ND mg/I Total Suspended Solids ND ND ND ND mg/I Nitrogen, Ammonia 0.11 0.067 0.11 0.09 mg/I Phosphorous NDI NDI NDI ND mg/I PZ -6 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 units Diesel Range Organics ND ND ND ND ND mg/I Total Suspended Solids 11.3 11.7 ND ND ND mg/I Nitrogen, Ammonia 0.1 0.098 0.071 0.077 0.079 mg/I Phosphorous NDI 0.0841 NDI NDI 0.071 mg/I Tiller Corporation Page 9 2013 Annual Operators Permit Application January 24, 2013 Table 2: Water Quality Monitoring Results Continued MW -1 10/21/2009 9/14/2010 9/29/2011 9/26/2012 9/26/2013 ND Diesel Range Organics ND ND NO NO NO mg/I Total Suspended Solids ND Phosphorous 15 41.6 NO mg/I Nitrogen, Ammonia 0.048 mg/I 0.049 0.075 0.086 mg/I Phosphorous No, 0.089 No, NO ND mg/I MW -2 10/21/2009 9/14/2010 11/5/2010 Diesel Range Organics ND ND mg/I Total Suspended Solids 26.8 0.11* mg/I Nitrogen, Ammonia 0.055 NO mg/I Phosphorous ND ND mg/I POND 10/21/2009 9/14/2010 11/5/2010 9/29/2011 9/26/2012 9/26/2013 Diesel Range Organics ND 0.11* ND NO NO NO mg/I Total Suspended Solids ND ND NA ND NO NO mg/I Nitrogen, Ammonia NO 0.057 NA 0.069 0.078 0.089 mg/I Phosphorous No, ND NA ND NO ND mg/I *Upon Detection of Diesel Range Organics (DRO) above the Reporting Limit of 0.10 mg/I, the sample was further analyzed for the presence of Polycyclic Aromatic Hydrocarbons (PAHs) which were not detected. As additional follow up, the pond was resampled for DRO in November, 2010 at the request of the City. Although not required, initial baseline data were obtained for all wells and results reported herein. Tiller Corporation Page 10 2013 Annual Operators Permit Application January 24, 2013 AERIAL PHOTOGRAPH 2014 AOP Application 2010 FSA image from Minnesota Geospacial Information Office NOTES: 1. TOPOGRAPHY IS FROM A COMPILATION AERIAL SURVEY BY MARTINEZ CORPOR. DATED 11/11/1998, TOPOGRAPHIC SU SUNDE LAND SURVEYING, LLC DATED 02/10/2005 FOR THE ACTIVE MINING AREA, AND TOPOGRAPHIC DATA FROM WASHINGTON COUNTY DATED 01/31/2 THE NORTHEASTERN 800 ACRES. 2. SETBACKS. THE FOLLOWING MINING SE WILL BE MAINTAINED: • 50' FROM PROPERTY LINE • 200' FROM OCCUPIED STRUCTURE • 100' FROM ANY CONTIGUOUS PRC SUBDIVIDED INTO RESIDENTIAL L01 ACRES OR LESS (NOT APPLICABLE 100' FROM ROAD R -O -W X93-253 IV 300 0 300 60( SCALE IN FEET T.32 . ED 7.83, GL DRAWING: \\Kirstenspc\dwgs\Tiller — All\Tiller Scandia\Annual Operotors Permit\AOP 2014\2014 ACE — Site Plan Ci FINALdwg.dwg LAYOUT: Cl 11X17 �Sund� Engineering, PuCF 14W CONSULTING CIVIL ENGINEERS 10830 NESBITT AVENUE SOUTH BLOOMINGTON, MINNESOTA 55437 (952)881-3344 TELEPHONE (952)881-1913 FAX —.sundeolvd — TILLER CORPORATION 2014 ANNUAL OPERATORS PERMIT SCANDIA, MINNESOTA DATE REVISION 3/3/11 Well Labels 1119112 Add MW -e 1/2312Add Drexel prdpeM line 11-13 2013 Updatef AOP 1/2V14 Update for AOP I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM DULY LICENSED PROF SSION ENGINEER UN DER THE LAWS OF EST EOF MI Kirsten Pauly DATE: 01/24/2014 REG. NO.: 842 INFORMATION: PROJECT NO.: 93-253 DRAWN BY: CHECKED BY: KP APPROVED BY: KP SCALE: Graphic DATE: DESCRIPTION: SITE PLAN SHEET NO: C1 l ofi