Post-Construction Maintenance and Monitoring
A Final Inspection was conducted at the Marjol Battery Site on August 31, 2010. Based on the inspection, construction of the Final Remedy was determined to be “substantially complete” as of August 27, 2010, and the site is in the post-construction period. All lead-contaminated material at the Site has been consolidated in the Containment (cap) Area (CA) and covered by the multiple layers of cap materials, so all surfaces of the Site are clean (average lead levels below 500 mg/kg). (Click here for a drawing showing the layers of the cap.)
With major construction activities at the Site completed, there are several post-construction items Gould would like to provide information to the community about:
SPRING/SUMMER 2013 SITE
With basin conversion completed, erosion inspections focusing on erosion and sedimentation controls will continue weekly until permanent vegetation is established on the newly seeded areas. Once that vegetation is established, Gould will request an inspection by LCCD to close out the NPDES permit for the Site. The earliest that this will occur is summer 2013.
Spring site maintenance activities, including those associated with cultivation of vegetation at the Marjol Battery Site will begin the week of April 29, 2013. In particular, we will be working to cultivate vegetation in the sedimentation basin and other areas that were newly seeded last fall (areas involved with basin conversion activities). There will likely be a few small pieces of equipment brought onto the Site to be used for these activities. Additionally, we will be doing some maintenance on the stone check dams at the Site (adding stone), so there will be a few truckloads of stone brought into the Site. Working hours will be consistent with Throop Borough Ordinances (Monday through Friday from approximately 7 am to 5 pm)
Fencing— A split-rail fence with wire mesh was installed on-site around the Containment (cap) Area (CA) and along the eastern property line to protect the vegetation on the CA and, to prevent motorized vehicle access and to deter pedestrian access. Temporary fence panels were removed from the Site and chain link fencing was installed in some areas to deter motorized vehicles from accessing the property until significant vegetation is established. There is no longer a 6-foot chain link fence around the perimeter of the Site.
The USEPA/PADEP-approved 100% Design Plan includes required elements such as quarterly river monitoring, annual groundwater sampling, and the frequency of inspections.
Post-Construction Inspections - Erosion inspections will take place weekly unless the ground is snow-covered/frozen. Formal inspections will take place semi-annually through at least 2014.
Click on the dates below to review the monthly/quarterly/semi-annual inspection reports:
In response to the August 2011 earthquake and subsequent heavy rain events (Hurricane Irene and Tropical Storm Lee), Advanced GeoServices conducted a special inspection of the Containment Area (CA) on October 7, 2011. Based on observations of the slope conditions, it is Advanced GeoServices' opinion that the stability of the CA slopes were not adversely impacted by the earthquake or subsequent storm events. (Click here to review the special inspection report.)
See the table below for a list of some of the monitoring activities required in the Design Plan.
Summary of Post –Construction Monitoring Activities
LOW AREA MODIFICATIONS