Solid waste landfills which accepted waste on or after December 21, 1988 are required to monitor ground water for potential solid waste impacts. Regulations governing the design and performance of landfill groundwater monitoring networks are found within 9 VAC 20-81-250.A – E of the Virginia Solid Waste Management Regulations.
Solid waste landfills that impact ground water above regulatory standards (commonly known as groundwater protection standards) at or beyond the groundwater point of compliance will be required to address the impacts via solid waste corrective action described under 9 VAC 20-81-260.A – H.
The solid waste ground water program required at solid waste landfills contains several distinct components including:
- Design, installation, and maintenance of a groundwater compliance well network around the perimeter of the landfill.
- Routine sampling and analysis of groundwater.
- Comparison of sampling results to site background and where applicable, ground water protection standards.
- Initiation and completion of groundwater corrective action, where needed.
- Routine reporting of groundwater monitoring activities.
The actions described above may also trigger the need for additional actions related to permit modifications, addressing financial assurance requirements, updating groundwater monitoring, landfill closure, and/or post-closure care plans, and public participation/outreach efforts. Questions concerning solid waste ground water monitoring may be directed to the program coordinator or the appropriate individual listed in the Regional Contacts section below.
Solid Waste Alternate Concentration Limits (ACL)
ACL Table 2013
: Attached is the current ACL table ( effective July 01, 2013). Please refer to the draft technical memorandum
prior to using the ACL table. Please note that the ACL table is revised once a year; each new version of the ACL table supersedes all previous versions. See 9VAC20-81-250.
Distribution Letter for ACL Update
: This letter shares the information about the newly updated ACL table dated December, 2011. The latest table has thirteen changes in ACL values compared to the update that is currently in use dated January 2011. Of the thirteen changes, ten are due to revision of toxicity values. The remaining three are due to mutagen designation which incorporated slightly different calculations. The changes in the December update reflect toxicity values and calculation methodology used by EPA Region 3 in the RSL update of June 2011.
The regulatory sections most applicable to the solid waste groundwater program are provided here:
Ground Water Frequently Asked Questions (FAQ)
DEQ has issued the following FAQ documents dealing with common ground water issues. Currently, the topics covered include:
Suggestions for additional FAQ topics cab be directed to the solid waste ground water program coordinator, Geoff Christe, at (804) 698-4283
Resources / References
The RCRA Online EPA website provides supporting information for the federal regulations.
Technical Review Checklists
DEQ has issued submission instructions for many of the topics below. Use of the instructions greatly improves the likelihood a technical submission will be judged to the complete. The following are used by DEQ staff when reviewing groundwater submissions. Landfill owner/operators may independently utilize the checklists as a form of QA/QC when putting together ground water submission to ensure all applicable content has been included in the submission.
To review groundwater submission instructions, please follow the links below to the Virginia Regulatory Town Hall by clicking on the document title. Please check back periodically as new instruction updates for Amendment 7 are planned for release in 2012.