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6. Pit construction (by this solicitation) shall be 8-9 feet wide, and 14 feet deep. 7. A 12” dirt seal will be placed on the lip of the burn pit area to seal the lower nozzle. 8. The blower will be configured to direct the airflow to strike the wall of the pit 2 feet below the edge. Operators will be instructed that the debris should not break the path of the airflow except during dumping. 9. Equipment used will be tested and adjusted to assure that a minimum nozzle velocity of 8,800 ft/min (100 mph) and a volume of 900 cf/min/linear feet is produced during burn operations. 10. The length of the pit shall be no longer than the length of the blower nozzle. 11. The operators shall be instructed to load the pit uniformly along its length. 12. Operators will also be instructed to extinguish the fire at least 2 hours before removing the ash. 13. Water trucks will be used to dampen ash residue as well as areas surrounding the burn site. Chipping/Grinding Reduction of debris by chipping and/or grinding is an opportunity to recycle the vegetative debris back to economically beneficial use. However, the overall economic impact of chipping/grinding compared to burning will have to be reviewed before a determination can be made. Grinding/Chipping is the reduction of woody, vegetative debris by cutting and pounding the debris to reduce the woody materials into small pieces or “chips” This method normally produces a reduction of between 3 to 1 and 5 to 1, whereas burning reduces the debris by approximately 95%. However, wood chips can be recycled and used as mulch, fuel, ground cover, and animal bedding to name a few. The availability to recycle the chips would be a significant factor in determining the economic value of chipping/grinding. In the construction and operation of a chipping/grinding reduction operation, special consideration is given to the following factors: 1. Grinding machines must have a clearance of 300 feet. Warning signs must be stationed around the perimeter of the grinding equipment, warning of possible flying objects from the grinders. 2. The grinding machines must have screens, which produce chips not exceeding 4 inches in length and ½ inch in diameter. 3. Liners shall be placed underneath grinders, and other stationary equipment, as a preventative measure against possible leaks or spills exposing the soil and groundwater to contaminants. 4. Debris must be sorted and cleaned of other contaminants such as metals. 5. Operators must wear hard hats even in closed cab machines while operating. 6. Root Rake loaders are used to avoid contaminating the debris entering the grinder with dirt or sand. 7. Ground debris or mulch shall be stored onsite in piles no higher than 15 feet. Such piles shall not remain on-site for longer than seven (7) days and haul-out procedures shall ensure. Ground debris or mulch is monitored daily for heat and internal combustion. Segregation of Debris Before the material is brought into the DMS, all preparations outlined above will be substantially completed. The DMS will have staging areas for each category of debris brought to the site. All debris will pass by the inspection tower after entering the site and all loads will be inspected. Although every effort will be made to segregate debris on the right-of-way before loading, debris materials still become mixed, and some loads are so co-mingled that they are classified as mixed debris loads. These loads will be directed to the area defined on the site plan as the “mixed debris” pile. This material will be sorted and separated ITB No. 23-04-01 Disaster Debris Management and Disposal Services 89