Agenda - 10-14-1993 - D 1 - Laserfiche WebLink

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The entire erosion control plan for the asphalt plant has been designed so that no oil or petroleum products will either enter the soil or be carried offsite in stormwater runoff. The plan also provides for silt fencing and a settling pond during construction phase. The completed site will have a total of three ponds to contain runoff water. Any earthen berms and land disturbance areas will be vegetated in accordance with the Soil Erosion Control Plan, as detailed under the Seedbed Preparation and Seeding Schedule. In consideration of the plant's sensitive location, the usual industry practice of spraying haul-truck beds with a petroleum-based solvent to prevent adhesion will not be followed, but the asphalt plant will use a biodegradable product instead. Erosion and sedimentation will occur during the construction of all alternatives. For this reason. an erosion control schedule will be devised by the contractor using the engineer's erosion and sediment control plan as a minimum, before work is started. The project will be completed in accordance with Article 107-13 of the Standard Specifications which is entitled "Control of Erosion, Siltation and Pollution", The N.C. Division of Highways has also developed an Erosion and Sedimentation Control Program which has been approved by the N.C. Sedimentation Control Commission. The contractor shall maintain the earth surfaces of all waste areas, both during the work and until completion of all seeding and mulching, or other erosion control measures specified, in a manner which will effectively control erosion and siltation. B. Groundwater Lateral expansion of the quarry pit will cause an attendant spread of the dewatered area around the periphery of the pit. Based upon past experience of the effects of quarry excavation on groundwater supplies, the dewatered area is expected to extend outward from the quarry face a distance equal to the depth of the quarry. At this site this zone potentially could extend approximately 250 feet beyond the quarry face. There are no known groundwater users at the northwest end of the property who would be effected. Expansion to the southeast will be toward the existing reservoir and will not be close to residents on the south side of Route 54. The closest groundwater users are mobile home owners along SR 1104 at the northeast tip of the present quarry, Water supply to these mobile homes is a community well. There have been no reported problems with this well over the more than 20 years the quarry has been in operations. In addition, the proposed quarry expansion will not move quarry operations closer to the mobile homes. 4-5