4.6 PCSR 01-14-2014 - Laserfiche WebLink

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January 10,2014 Page 4 of 8 Screening berm information has been updated on Sheet Cl,Existing Conditions. The berms vary in height from approximately ten to sixteen feet. They are typically constructed with 3:1 slopes, with a five to ten foot wide top and are situated within the mining setback areas. The berms have established vegetation and are mowed periodically. The berm along US 169 is planted with trees and there are shrubs along the base of the berms at the entrance to the facility. The berms provide excellent site screening from existing operations. As mining progresses to the west, screening berms will be extended to the west both north and south of 221'Ave. Security fencing on new parcel to the south: Prior to commencing mining operations on the new parcel to the south, Tiller will install security fencing in compliance with the City's ordinance. Fixed/Portable Storage and Protective Measures: The site has eight aboveground storage tanks(ASTs)for use in the site production process. Seven of these tanks are located within a concrete secondary containment area. There is also a double- walled 1,000-gallon diesel fuel tank located outside the secondary containment area near the back- up generator. A 30-gallon parts washer is located in the maintenance building. One 275-gallon tote container of CT6100(truck bed release agent)is located at the northern portion of the site. Fixed Storage ASTs: (4)40,000-gallon aboveground vertical tanks(asphalt cement) (1)20,000-gallon aboveground vertical tanks(used oil) (1) 1,000-gallon aboveground horizontal tank(diesel fuel) (1) 120-gallon aboveground horizontal tank(diesel fuel) (1) 1,000-gallon aboveground horizontal double walled tank(diesel fuel) Portable Storage: (1)a 275-gallon tote of truck bed release agent Hazardous materials will be limited to Materials of Trade(MOT)carried in a-ervi_ce trliek which will come to the site to perform routine maintenance on operating equipment.The service truck will take all used fluids and filters from the site where they will be properly disposed of at the Operator's main shop. The service truck will carry a spill containment kit. A MOT as defined in a Fact Sheet published by the Minnesota Department of Transportation' is a hazardous material, other than a hazardous waste,that is carried on a motor vehicle: • For the purpose of supporting the operation or maintenance of a motor vehicle including its auxiliary equipment(e.g.,engine starting fluid or spare wet batteries carried on a tow truck); or • By a private motor carrier,including a vehicle operated by a rail carrier, in direct support of a principal business that is other than transportation by motor vehicle(e.g., landscaping, plumbing,or welding services). ' Minnesota Department of Transportation(Mn/DOT). Minnesota Commercial Truck and Passenger Regulations Fact Sheet: Materials of Trade, St.Paul,MN. Available at: http://www.dot.state.mn.us/cvo/factsheets/hm200mot.pdf.