Making the Program Faster, Fairer, and More Efficient (Continued)

General description:
The NPL is a list of abandoned or uncontrolled hazardous substance sites that are the national priorities for long-term cleanup, making them eligible for Federal cleanp funds.

Cleanup at Ambler Asbestos Piles site:
In June 1986 the site was formally added to the NPL.

General description:
Once a site has been placed on the NPL, a Remedial Investigation (RI) and Feasibility Study (FS) are conducted. The purpose of the RI is to collect data necessary to assess risk and support the selection of response alternatives. The FS is a process for developing, evaluating, and selecting a remedial action.

Cleanup at Ambler Asbestos Piles site:
The RI/FS was issued in September of 1989. The RI revealed a total of 1.5 million cubic yards of asbestos-contaminated wastes abandoned on-site, with notable levels of asbestos detected in Wissahickon Creek, which borders the property. Feasible actions to mitigate the threat of asbestos release were explored.

General description:
Once an RI/FS is completed, a Record of Decision (ROD) is generated, which outlines cleanup actions planned for a site.

Cleanup at Ambler Asbestos Piles site:
1988 and 1989, two RODs were filed documenting the remedies selected for the site.

General description:
The Remedial Design (RD) is the set of technical plans and specifications for implementing the cleanup actions chosen in the ROD.

Cleanup at Ambler Asbestos Piles site:
In 1992, RD negotiations were completed and a plan was selected.

General description:
Remedial Action (RA) is the execution of construction and other work necessary to implement the chosen remedy.

Cleanup at Ambler Asbestos Piles site:
An RA was reached in 1993, with agreed remedies consisting of: regrading pile plateaus; reinforcing the soil cover; installing erosion and sedimentation control devices; treating surface water and runoff; installing or upgrading the fence/locking gates; posting warning signs; and monitoring the air.

General description:
Construction completion is where physical construction of all cleanup remedies is complete, all immediate threats have been addressed, and all long-term threats are under control.

Cleanup at Ambler Asbestos Piles site:
Construction of all remedies was completed in August 1993 along with approvals and documentation.

General description:
Operation and Maintenance are activities conducted at a site after remedial construction activities have been completed to ensure the cleanup methods are working properly.

Cleanup at Ambler Asbestos Piles site:
Post-closure inspections, monitoring, maintenance of the piles, and preparation of a contingency plan occurred.

General description:
When EPA, in conjunction with the State, has determined that all appropriate response actions have been implemented and no further remedial measures are necessary, a Notice of Final Action to Delete is published in the Federal Register. If EPA receives no significant adverse or critical comments from the public within the 30-day comment period, the site is deleted from the NPL.

Cleanup at Ambler Asbestos Piles site:
In December 1996, the Ambler Asbestos Pile site was deleted from the NPL.