05-1603 Debris Reduction - Laserfiche WebLink

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7.2 Minimum required air velocity measured at the nozzle is 8,800 ft/min (100 mph). Minimum airflow rate measured at the nozzle is 900 cubic feet per min (cftn) per linear foot of pit length. (As an example, a 20 foot long pit would require a blower with a nozzle velocity of 8,800 ft/min and nozzle output rate of 18,000 cfm. This example is intended for explanation purposes only, and does not imply a recommended pit length for actual operations.) 7.3 There is to be a minimum distance of 100 feet between the portable incinerator and the nearest debris piles. There is to be a minimum distance of 1,000 feet between the portable incinerator and the nearest building. Contractors must assure that the public and workers are kept a safe distance from the incinerator. 7.4 The burn will be extinguished at least 2 hours before removal of the ash. 7.5 There should be a one (I) foot height warning stops running the length of the pits to alert equipment operators when they are close to the pit. The warning stops should be constructed of fireproof material. 7.6 No hazardous or contained-ignitable material is be dumped into the pit. 7.7 The contractor is responsible for ensuring that the public is protected from the burn operation. Signs, fences and other measures can be used depending on the site conditions. 7.8 Emissions must meet State and Federal standards for burning operations. 7.9 The Contractor shall be responsible for dust control while handling ash materials. 8. CHIPPING AND GRINDING. 8.1 If the contractor chooses to use chipping/grinding as a method of debris reduction, it is the Contractor's responsibility to acceptably dispose of the chips or mulch, at no additional cost to the City. Because the volume reduction achieved by chipping/grinding is not as great as the volume reduction achieved by incineration, disposal of the chips or mulch in a landfill is not an acceptable means of disposal. For disposal, the chips or mulch must be put to some benefit or use. The Contractor may provide or sell the chips or mulch to be recycled for use in agricultural mulch, fuel or wood products. 8.2 The average chip size produced will be dependent on the needs of the end user, but typically should not exceed 4 inches in length and Y2 inch in diameter. 8.3 Contamination: Contaminates are all materials other than wood products. Contaminates must be held to 10% or less for the chips or mulch to be acceptable. Plastics should be eliminated completely. To help eliminate contaminates, root rake loaders should be used to feed or crowd material to the chipper/grinder. Bucket loaders tend to scoop up earth, which is a contaminate. The use of hand laborers must be utilized Seope of Work - Redudion & Site Management May 2005 Page 6 oft4