SWMU 71 – Quarry Disposal Site

SWMU 71 is identified as the quarry disposal site and is located at the Commissary parking lot, where a quarry was once operated, and an open grassy field adjacent to the parking lot. Aerial photography and records reviews identified the area as a former quarry site. During the site inspection, remnants of the quarry area were observed; however, there was no evidence of disposal, stains, or stressed vegetation. Interviews confirmed both storage and disposal of drums containing a tar-like substance in the area, which were uncovered during construction of the Commissary parking lot. The full extent of the disposal area is unknown.

A majority of the area is covered in secondary growth vegetation.

Surface soil, subsurface soil, and groundwater samples were collected to characterize the site. In general, analytes detected in the soil and groundwater samples are associated with fuel and degreasing operations. Therefore, it is likely that previous activities have impacted the environment at the Quarry Disposal Site.

Status

• The RCRA 7003 Administrative Order on Consent recommends a Phase I RFI for the Quarry Disposal Site.
• The Final Phase I RFI Work Plan for SWMU 71 was submitted on December 20, 2007.
• The Revised Final Phase I RFI Work Plan for SWMU 71 was submitted on April 17, 2008 and was approved by the EPA on May 13, 2008.
• The RFI Field Investigation was completed in June 2008.
• A Draft Phase I RCRA Facility Investigation Report was submitted to the EPA on March 12, 2009.