Ash Pits Capped

June 2003

Ash Pits Capped

Grading Ash Pits with clean fill

History

The Ash Pits were located either side of East Princeton Avenue in the central portion of the BNL site almost two-thirds of a mile from the southern site boundary. The pits received ash and slag from a solid waste incinerator used from World War I to the early 1950s. The Ash Pits also were used for disposal of coal ash from various buildings throughout BNL until 1963. The pits occupy approximately three acres.

According to BNL staff, fill material was deposited on top of the Ash Pits along the north and south sides of East Princeton Avenue to build up the road. A portion of the northeast area of the pits was covered with concrete debris from concrete trucks dumping residual loads. In the 90s a section of the road was raised 10 feet to prevent rainwater runoff from ponding on the road. A portion of the area was also regraded, revegetated, and rip-rap was used to mitigate erosion.

Background

The boundary of the Ash Pits was delineated in 1994 as part of the Landfills Closure Engineering Evaluation/Cost Analysis through the installation of 13 test pits on the outer boundary of the area. During the excavation of the test pits, eight grab samples were collected and analyzed for metals, volatile and semi-volatile organic compouns, pesticides, PCBs, and radionuclides. Additional sampling was completed in 1996 as part of the OU I/VI Remedial Investigation/Remedial Action report.

Chemical concentrations were determined to be acceptable for industrial or open space future use and radionuclide concentrations were below EPA's target risk range. Lead concentrations, however, exceeded EPAs soil screening levels.

Remedial Action

Additional remediation on the filled, northern portion of the ash pit was not required. Remediation of the southern ash pit required removal of some trees, backfilling of soil to even out the grade, covering the site with of 12-inches of topsoil, and finally reseeding of the area with native grasses. The cleanup began on June 27, 2003 and was completed July 30, 2003

Documents / Links

Closeout Report