Operable Unit. 7 (FTEUST-
Operable Unit. I OU I consists of the property of the former Monticello mill (mill site) and the repository. Radioactively contaminated materials were removed from the MVP, the mill site, and peripheral properties (OU II) and encapsulated at the repository as a remedial action that was completed in 1999. LM owns and manages the repository; the City owns the former mill site and manages it as a public park.
Operable Unit. If Dispute Resolution is not invoked within thirty (30) days after the Project Managers’ discussion concerning the modification, or if the need for modifying an Operable Unit is established through Dispute Resolution, the Operable Unit, as defined in Section II – DEFINITIONS, shall be modified.
9.2.4 In the Site Management Plan, USACE shall include a Schedule and Milestone(s) for submitting RI/FS Work Plan(s) for the Operable Units, except for those Operable Units for which RI/FS Work Plans have already been submitted. When a new Operable Unit is established under Subsection 9.2.2, USACE shall, in the next draft amendment to the Site Management Plan, propose a Milestone for submitting of a RI/FS Work Plan for the new Operable Unit. When an Operable Unit is modified under Subsection 9.2.3, and RI/FS work is appropriate for the modified Operable Unit, USACE shall, in the next draft amendment to the Site Management Plan, propose a Milestone for submitting a RI/FS Work Plan for the modified Operable Unit. The RI/FS Work Plan(s) shall contain proposed Schedules and Milestone(s) for the submittal of the RI/FS Report(s). The Schedule(s) and Milestone(s) included in the Final RI/FS Work Plan(s) shall be incorporated into the Site Management Plan in accordance with Section XI – DEADLINES AND CONTENTS OF SITE MANAGEMENT PLAN of this Agreement. The development of the FS(s) will proceed in accordance with Subsection 9.2.7 of this Agreement.
9.2.5 For those Sites that the Parties determine represent a negligible or minimal risk and are strong candidates for no action, USACE shall submit a concise FS statement indicating negligible or minimal risks were found and no action is warranted. If the Parties determine that no action is required, a no-action Proposed Plan will be prepared. A Schedule for completing a no-action Proposed Plan will be developed in accordance with Section XI – DEADLINES AND CONTENTS OF SITE MANAGEMENT PLAN of this Agreement.
9.2.6 RIs shall be conducted in accordance with the requirements and Schedules set forth in the approved RI/FS Work Plan(s) and Site Management Plan. RIs shall meet the purposes set forth in Section IV – PURPOSE, of this Agreement. A Baseline Risk Assessment shall be a component of the RIs. Final Site clean-up level criteria will only be determined following completion of the Baseline Risk Assessment.
9.2.7 USACE agrees it shall develop, implement, and report upon a FS for areas subject to a RI. The FS shall be conducted in acc...
Operable Unit. 1 (FTEUST-30)—Xxxxxx Creek. Hazardous substances, including PCBs, lead, and pesticides, have been released into Xxxxxx Creek. PCBs were found in fish and sediment samples. In addition, surface water sampling revealed elevated levels of lead and PCBs in the creek. Sampling conducted during the summer of 1999 showed PCB concentrations over 2,200 parts per million (ppm) in sediment. An Interim Removal Action (IRA) addressing PCB hot spot contamination was completed in June 2000. Over 6,600 tons of PCB contaminated sediments were removed and disposed off-site. The site was back filled to its original elevations with clean fill and re-vegetated with wetland plants. Since the IRA did not remove all of the contaminated sediments, a revised risk assessment will be part of the ongoing feasibility study (FS). In the spring of 2001, 41 sediment samples were collected and analyzed. Clams and mummichogs were also collected and analyzed from four locations within Xxxxxx Creek;
Operable Unit. 2 (FTEUST-29)—Xxxxx’x Lake. During a 1982 water quality study, the U.S. Army Environmental Hygiene Agency (USAEHA) observed fish with lesions in Xxxxx’x Lake. USAEHA recommended that the lake be off-limits to fishing. It has remained off-limits to fishing since that time. During subsequent investigations of Xxxxx’x Lake, sediment and water samples were collected and the biota of the Lake was examined. Pesticides, PCBs, and fuel hydrocarbons have been detected in the lake’s sediments. An Interim Removal Action (IRA) was conducted in 1999 to address the contamination at Xxxxx’x Lake. The IRA involved draining the entire lake, excavating sediments from the upper drainage ditch, placing sediments in the deeper portion of the lake, capping the bottom of the entire lake with two feet of clean fill, restoring the lake and re-stocking it with fish. Post-IRA monitoring and a feasibility study were completed in 2005. A Proposed Plan was released for public review and comment in August 2005. The Record of Decision was finalized in September 2007. The selected remedy calls for dredging or excavation of the Lake’s upper ditch, disposal of contaminated sediment off-site, construction of a storm water control system, long-term monitoring of various media (including surface water, sediment, benthic and aquatic organisms), and restrictions on land use;
Operable Unit. 5 (FTEUST-34)—The DOL Storage Yard. Hazardous substances, including pesticides and polyaromatic hydrocarbons (PAHs), have been released into soil and sediment directly under and surrounding the yard, and into the adjacent wetland and drainage swale areas. A Record of Decision (ROD) was issued for the DOL Storage Yard in 2001 to address these releases. The on-site remedial action work for this site was completed in 2003. EPA approved a Remedial Action Completion Report (RACR) for this site in June 2006;
Operable Unit. 9 (FTEUST-04) —Landfill #7, also known as South Landfill. Landfill #7 is a non-permitted landfill, because it ceased operation prior to VDEQ’s issuance of regulations requiring solid waste landfill permits. It was reported to have received waste (municipal solid waste, construction debris, paints, oils, pesticide and herbicide containers, and infectious/pathological waste) from 1951 to 1972 and contains two specific areas. Open burning was also conducted in the landfill. Sampling in 1977 showed degradation of groundwater due to landfill actives. Contaminants found at elevated levels include benzene, 1,1,2,2- tetrachloroethane, PCBs and metals. Groundwater studies in 1985, 1987, and 1988 showed low levels of metals, chlorobenzene, naphthalene, and 2-4-dinitrotoluene. A groundwater monitoring program was initiated in 1990. The landfill was capped in 1994. During a 1995 monitoring event, methane gas was detected at points outside the boundary of the landfill and near several on-post warehouses. To protect the safety and health of the occupants, a soil vapor extraction (SVE) system was installed and started operating in February 1998. The SVE system was designed to eliminate the migration of methane between the landfill and the warehouses. Methane gas monitors with alarms were installed in the five (5) nearby warehouses. Unsafe levels of methane gas have not been detected in the warehouses since SVE system operation began in February 1998.
Operable Unit. 10 (FTEUST-01)—
Operable Unit. 11 (FTEUST-37), Former Skeet and Trap Range — Upland Area and Operable Unit 12 (FTEUST-38), Former Skeet and Trap Range —
Operable Unit. 13 (FTEUS-012-R-01), 1000” Rifle Range. The 1000” Rifle Range was a former small arms training range, including 0.22-, 0.30-, and 0.45-caliber munitions, from 1920 to 1945. The range, located south of Xxxxxx Avenue, northeast of OU 9 – Landfill 7, and north of the Warwick River, originally consisted of three firing ranges of different lengths. The Northern and Southern Berms are still present, and a concrete wall forms the back of the Northern Berm. Mounded soil, believed to be the remnants of soil from the Central Berm, is also present. The Central Berm may have been destroyed during the construction or capping of OU 9 - Landfill 7, located south of the site. The total area of this site is 18.5 acres. Lead was detected in excess of screening criteria during the site inspection.
