Agenda - 09-21-1999 - 2 - Laserfiche WebLink

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14. "What are the SS chemical constituents that will be tested in the groundwater monitoring wells? " The chemical constituents required for analysis of water samples from monitoring wells and surface water sampling points at Construction and Demolition landfills are listed in the attached memorandum from the NC Solid Waste Section. 15. `If remediation is necessary, to what extent; and when would remediation be terminated? " Under current regulations, any necessary remediation would continue until groundwater at the facility boundary met the North Carolina Drinking Water Standards, and surface streams below the facility met the State Surface Water Quality Standards. 16. "What amount of time would be required from the moment of exceedence of water standards to the implementation of remediation? " Upon receiving sampling reports with analyses showing an exceedence of the groundwater or surface water standards, the NC Solid Waste Section issues a letter requiring the operator to submit the following within 60 days: (a) a survey of all drinking water supply wells in the vicinity of the facility; (b) a plan to assess the nature and extent of the release; and, (c) a survey of other potential sources of contamination in the vicinity. Upon receipt of this plan, Solid Waste Section review and cooperative revision of the plan is carried out as soon as possible. The operator is normally required to execute the plan within 90 days, and required to notify immediately any threatened well owners and sample their well water. If a water supply well was found to be contaminated by a landfill, the Solid Waste Section would require the landfill operator to provide an alternate source of drinking water to the well owner. Regardless of the existence of any impact on existing supply wells near the landfill, the owner would be required to implement remediation, as discussed above. This process would take place over several years, with the time frame determined by the nature of the remedy and the level of risk associated with the release. 17. "The proposed well nest seems insufficient. Please address. " The reasoning that underlies the water quality monitoring system design is contained in the Site Study Application for the Guess Road site, which is currently being reviewed by the Solid Waste Section. After review of the Site Study Application; the Solid Waste Section may approve the monitoring system design, require modifications, or deny the site permit. Responses to Questions 5 Joyce Engineering, Inc.