The Prince William County Public Works Department recently provided the Board of County Supervisors with an update on Dominion Virginia Power’s closure of coal ash ponds at Possum Point:
Water Treatment System and Pond Dewatering The water treatment system is still not operating due to required major maintenance and retrofitting of the system to maximize removal efficiencies. A revised Concept Engineering Report (CER) describing the new system has been received and comments from the County and VDEQ have been made to Dominion. The County and VDEQ have no technical issues with the proposed system, but have raised issues with and asked for additional information regarding some administrative procedures and the qualifications of personnel operating the system. A revised CER has been submitted to the County and VDEQ for review and approval, and Dominion will provide additional information on the experience and qualifications of operating personnel to the County. The revised CER will require approval by the Board as an amendment to the Agreement with Dominion and is tentatively scheduled for consideration at the Board’s Jan. 10th meeting. The new treatment system will not operate until the revised CER is approved by the Board and VDEQ.
Some concern has been raised about the level of the water in Pond D. According to Dominion, the level is below the level when the treatment process started, and well within the levels allowed in the State’s permit for the impoundment.
Groundwater Monitoring As indicated in a previous email, Dominion has completed the installation of additional monitoring wells and two rounds of sampling results from new wells have been completed. Based upon the results, Dominion has agreed to the extension of Service Authority water or the installation of drinking water filtration systems for residents within approximately ½ mile from the Dominion Possum Point facility boundary, which is about 35 households. As stated in the public meeting held on December 13th, Dominion will pay costs of all hook-up fees charged by the Service Authority and the cost of a private contractor to run a water line into the home, or install a treatment system. Dominion has stated that all costs will be paid directly by Dominion, and no up-front payments will be required by the homeowners. They are currently working directly with the Service Authority and the individual homeowners to coordinate the installations. Homeowners who have recently paid for hook-up to public water will be reviewed by Dominion on a case by case basis for possible reimbursement.
Staff is reviewing the additional groundwater results as they are received. Dominion agreed to begin sampling of the “Beaver Pond” creek as part of this additional sampling initiative and has submitted its proposed sampling plan to the County. The County has commented on the plan, and an offsite “upstream” sampling point on Potomac Shore’s property is being considered. Sampling should be initiated in January 2017.
Solid Waste Closure Permit VDEQ is currently performing a final review of the permit application. The public comment period will not begin until all VDEQ comments have been addressed by Dominion. VDEQ has indicated that the public comment and public hearing process will not be initiated until sometime after January 1, 2017.
As part of the settlement Agreement with Dominion, Dominion agreed to pay up to $50,000 for the County’s outside subject matter experts. We anticipate by the end of December that the $50,000 authorized for consultant review will be expended.
For questions, please contact PWC Public Works at 703-792-6252.