2. the path less traveled Termination of Post Closure Care
Hosier Road Landfill – Suffolk, VA

3. 01 02 03 04 05 06 overview What is Post Closure Care?
Will it ever end? 03
How do we get there? 04
Facility Information 05
Stages of Termination
Landfill Gas Monitoring
Leachate Collection
Groundwater Monitoring 06
The Wrap Up

4. What is Post Closure Care?
The requirements placed upon solid waste disposal facility after closure to ensure environmental and public health safety for a specified number of years after closure.
Maintain Final Cover
Maintain Leachate Collection
Maintain Groundwater Monitoring
Maintain Gas Monitoring

5. You have to be in compliance!
When will it end?
The requirements placed upon solid waste disposal facility after closure to ensure environmental and public health safety for a specified number of years after closure
10 years if you stopped taking waste before October 9, 1993.
30 years if you stopped taking waste on or after October 9, 1993.
There’s a catch!
You have to be in compliance!

6. Facility information
Hosier Road Landfill

7. Facility Information Unlined pre-regulatory facility; 67 acres
EPA evaluated due to pesticide disposal; given Superfund Status (currently delisted)
1967
1985
trench and fill  mass fill
Capped with soil liner system
1991
Leachate collection system installed
1993
Groundwater monitoring initiated
1994
Official Closure
1995
Gas monitoring initiated
Clock start 10 year PCC…

8. Facility Background Groundwater Exceedances Landfill Gas Migration
Assessment Monitoring 1993
GPS Exceedance - Cobalt
Corrective Action Required
Landfill Gas Migration
Exceedance 2007
Moving beyond property boundaries
Leachate Collection
Started 1991
Pump and haul operation
Arsenic First metals exceedance

9. Termination Path options
Request Terminate for all aspects of post-closure care
Allows you to stop all compliance requirements at once
Request Partial-Termination of post-closure care
Allows you to stop specific compliance portions one of more at a time.
Landfill Gas, Leachate, Groundwater

10. Landfill gas Landfill Gas Migration In compliance for the next 3 years
Designed and Constructed a Mitigation trench to prevent landfill gas migration
Trench dug down to seasonal groundwater low
Liner place on furthest side
Collection/Vent piping installed
Backfilled with recycled tire chips
Gas probes were back in compliance within 30 days of trench completion (2009)
In compliance for the next 3 years
Requested Partial Termination of Post Closure Care
Approved by VDEQ 2013

11. Leachate Collection
System is designed to collect leachate seeps from the waste mass
System is comprised of four 4,000 gallon tanks fed by a gravity trench at each slope
Liquid collected in the tanks are hauled off site for disposal
Costing thousands of dollar to haul offsite
Tanks were experiencing rapid recharge and an instance of overflow

12. Leachate Collection Evaluation of Leachate Quality
The majority of parameter concentrations in the collection tanks are below the groundwater protection standards
Liquid in the tanks is significantly different than in the waste mass
The liquid in the collection system did not fall within the typical range of concentration for indicator constituents for leachate
Collection system appeared to be collecting infiltration from precipitation events or groundwater only

13. Leachate Collection Request for Leachate System Abandonment
Developed and implemented an abandonment plan for the system with regulatory approval
Simulated System Abandonment and Monitored for six months
Requested to abandon the leachate system
Approved for abandonment by VDEQ in February 2014
Fully Abandoned in July 2015

14. Groundwater Compliance
In Assessment Monitoring until exceedance for Cobalt
Moved into Corrective Action
Only one well in exceedance for cobalt; located on edge of waste mass
Alternate Point of Compliance (APC) well requested; VDEQ Approval 2015
APC well is in compliance for Cobalt!
City requested a release from Corrective Action, but during review, APC well has new exceedance for Cadmium

15. Groundwater Compliance
Evaluated options to remediate the Cd concentrations:
Would take too much time for Natural Attenuation
Difficult to eliminate metal contamination quickly
City did not want to have a long term cost to remediate an extremely low level of concentration.

16. UECA! Uniform Environmental Covenant Act
A servitude that imposes activity and use limitations on contaminated real property, allows for the long-term monitoring and enforcement of any risk-exposure controls placed on the property (i.e., restrictions on land uses/disturbances and prohibitions on using the impacted aquifer) in a statutorily defined, voluntary agreement “environmental covenant”). Such a covenant runs with the land and would be binding on subsequent land purchasers and tenants of the property. It would also be listed/recorded in the local land records office

17. UECA! Resources: VDEQ provides a template in 9 VAC 15-90-30
VDEQ FAQ Page:
Regulations (9 VAC ):
VDEQ provides a template in 9 VAC
VDEQ Contact Point:
Ms. Michelle Hollis
UECA Coordinator
(804)

18. JOB DONE!! The wrap up 2.16.2017 UECA Finalized 2.24.2017
Corrective Action Terminated
Full Termination of Post Closure Care
Monitoring Wells and Gas Probes Abandoned
City has to inspect the facility every 5 years and report to VDEQ (no sampling for groundwater or landfill gas involved)
JOB DONE!!

19. Aaron J. White, PG www.hdrinc.com 249 Central Park Avenue, Suite 201
Professional Associate
Project Manager
249 Central Park Avenue, Suite 201
Virginia Beach, VA 23462 D