Innovative Approaches: Executed Safely –HGL is a full-service military munitions response (MMR) provider with the capabilities to effectively execute any project, regardless of size or location, from concept through completion. HGL develops technical approaches specific to the unique characteristics of each site to ensure complete coverage of munitions clearance areas. These approaches are implemented in accordance with HGL’s stringent safety program by qualified personnel with expertise in munitions clearance and intrusive investigations. HGL has conducted MMR work at numerous Department of Defense (DoD) and non-DoD facilities, frequently addressing munitions debris and munitions constituents concurrently with hazardous, toxic, and radiological waste issues as well as chemical warfare materiel (CWM).
HGL’s multidisciplinary project delivery teams of program and project managers, UXO specialists, geophysicists, information and geospatial technologists, numerical modelers, and scientists focus on integrating specialized skills and experience to develop innovative technical approaches, expedite removal activities, and negotiate restoration exit strategies. HGL’s MMR expertise encompasses the following:
- MMR Operational Planning
- MMR Remedial Investigations/Feasibility Studies (RI/FS)
- MMR Removal Action
- MMR Remedial Design
- MMR Remedial Action
- Explosive Threat Analysis
- Munitions and Explosives of Concern (MEC) Risk Assessments
- Emergency Response
- Wide-Area Assessments
- Digital Geophysical Mapping and Data Acquisition/Interpretation
- Advanced Geophysical Classification
- CWM Investigation/Remediation
- Munitions Constituent Sampling and Analysis
- Munitions Constituent Fate and Transport Modeling
- Regulatory Interaction
- Site Security
- GPS Data and GIS Systems
- MMR Site Closures
- MEC Construction/Excavation
- MEC Demolition/Disposal
- Mine Detection
- Munitions Transportation
- Community Relations
- Operational Range Sustainment and Clearance
The following three projects demonstrate HGL’s/Spectrum’s expertise at mine sites:
- MEC Removal Action at Badlands Bombing Range, Pine Ridge, South Dakota: a former DoD aircraft bombing range,
- RI/FS at Camp Butner, Granville County, North Carolina: a former U.S. Army installation, and
- Performance-based Remediation Services at Fort McClellan, Alabama: a former U.S. Army installation.
Munitions and Explosives of Concern Removal Action at Badlands Bombing Range, Pine Ridge, South Dakota
HGL completed a Remedial Investigation/Feasibility Study (RI/FS) and a Proposed Plan/Decision Document for bombing targets at the former Pine Ridge Bombing and Gunnery Range, Battleship Bomb Target (Sector 10). The objective of the project was to remove munitions and explosives of concern (MEC) from 1,860 acres of Oglala Sioux Tribe land. HGL performed digital geophysical mapping surveys, surface clearance, anomaly reacquisition, intrusive verification of subsurface targets, MEC removal/destruction, munitions constituent sampling and analysis, material potentially presenting an explosive hazard inspection and disposal; and surveys.
HGL successfully worked with regulatory agencies, tribal agencies, and other stakeholders during this project. HGL prepared public participation and community relations materials for the project, conducted a public meeting for the Proposed Plan, and coordinated all project activities with stakeholders.
|✔||Identified and excavated over 49,000 anomalies, recovered 517 MEC items and 34,222 pounds of munitions debris, and confirmed MEC contamination that included 100-pound general purpose bombs (M series), 100-pound practice bombs (M38), 4-pound incendiary bombs (M54), and 20mm projectiles and cartridges.|
|✔||Analyzed potential risks early in the project, which included inability to obtain rights-of-entry from the Oglala Sioux Tribe and impacts of weather, developed risk mitigation procedures for meeting the project performance objectives, and discussed the risks with the stakeholders as part of the technical project plan process.|
|✔||Prepared a focused FS that evaluated potential remedial alternatives to address the identified MEC hazards, summarized removal actions and recommended munitions response site boundaries for delineation, and provided for ongoing land use controls maintenance and 5-year reviews as applicable.|
|✔||Worked closely with representatives of the Oglala Sioux Tribe to ensure that public involvement efforts met community needs and prepared 3Rs Program materials, poster boards, and quarterly newsletters that had had been translated into Lakota for distribution during outreach events.|
Remedial Investigation/Feasibility Study at Camp Butner, Granville County, North Carolina
HGL completed a CERCLA Remedial Investigation (RI) to characterize the nature and extent of munitions and explosives of concern (MEC) and munitions constituents (MC) at five munitions response sites (MRSs) within the former Camp Butner, a Formerly Used Defense Site (FUDS). The purpose of the RI was to determine the presence or absence of MEC and MC at each of the MRSs, to define the nature and extent of any identified MEC/MC contamination, and to complete human health and ecological risk assessments. The RI delineated MEC and MC contamination at the MRSs, identified a new MRS, and recommended future remedial actions. HGL used RI-collected field data plus previously collected Engineering Evaluation/Cost Analysis (EE/CA) and removal action data to identify data gaps, update the conceptual site model, evaluate MEC hazards and assess human health and ecological risks, and update the Munitions Response Site Prioritization Protocol and the MEC Hazard Assessment. Activities also included the completion of a Feasibility Study (FS), a Proposed Plan, and a Decision Document.
|✔||Delineated MEC-contaminated areas with an accuracy of at least 250 feet, determined the potential depth of unexploded ordnance with a 90% level of confidence, and determined the nature of munitions debris with a 90% level of confidence.|
|✔||Based on the findings of the RI, recommended that no further action be taken on one MRS and that the others proceed to the FS phase because of MEC contamination.|
|✔||Identified risks such as being unable to obtain rights-of-entry (ROEs) for 100% of the property and mitigated the risk by assisting the U.S. Government in obtaining ROEs by visiting property owners, holding public meetings, and conducting mailings to solicit ROEs.|
Performance-based Remediation Services at Fort McClellan, Alabama
HGL is conducting removal actions to remediate contaminated soils and sediments at the Bains Gap Road Ranges (BGRR), ranges near Training Area T-24A (T-24A), the Choccolocco Corridor Ranges (CCR), and the former 81mm Mortar Range (81MM). Soil contaminants of concern are munitions debris, antimony, copper, lead, and zinc; and groundwater at T-24A is contaminated with benzene and carbon tetrachloride.
HGL completed soil source removal actions at T-24A, BGRR, CCR, and 81MM. Work included excavation, stabilization, and disposal of over 175,000 tons of soil and sediment. Excavated soil was collected into 300-cubic-yard stockpiles and sampled for lead. Stockpiles in which lead levels exceeded the toxicity characteristic leaching procedure (TCLP) limit were stabilized by being mechanically blended with approximately 12 tons of EnviroBlend®, a commercially available heavy metals stabilizing agent. Stockpiles in which lead did not exceed TCLP limits were transported off site for disposal as nonhazardous special waste. Sites T-24A, CCR, BGRR, and 81MM were restored by backfilling and contouring excavation areas to the surrounding grade, utilizing over 83,000 tons of fill and topsoil.
|✔||Conducted munitions and explosives of concern construction support throughout the life of the project.|
|✔||Excavated, stabilized, and disposed of over 175,000 tons of metals-contaminated soils in a 15-month period.|
|✔||Restored impacted wetlands at BGRR and T-24A by backfilling the area with hydric soils and replanting the area with a mix of native trees and shrubs.|
|✔||At BGRR, remediated 4,500 linear feet of Cane Creek by redirecting the creek, excavating contaminated sediments, restoring the creek by armoring steeper banks with riprap and grading, seeding the area, and installing turf reinforcement matting on more gradual slopes.|