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Projects :: Site Remediation
Radiological Investigations and Surveys, Hunters Point Naval Shipyard, San Francisco, CA
NWE has been onsite at Hunters Point since 1999. We were originally contracted
by AFSC for radiological remediation, radioactive waste brokerage and eventually
to co-author the Historical Radiological Assessment.
Since 2003, NWE has been onsite at Hunters Point as a subcontractor to Tetra
tech ECI (formerly Tetra tech Foster Wheeler), performing radiological investigations—surveys,
sampling and radio analytical laboratory analysis.
The initial Scope of Work consisted of providing remediation services and release surveys of four separate areas identified as containing radionuclides exceeding the Primary Remediation Goals (PRG's). Designed and Conducted Class 1, 2, and 3 MARSSIM surveys, scoping surveys and characterization surveys in buildings and impacted sites within the shipyard.
The project schedules and survey requirements necessitated on-site laboratories
for field screening of samples to ensure remedial actions and existing conditions
meet the required project release criteria, and schedules. NWE currently has
3 radioanalytical laboratories onsite performing alpha, beta and gamma scans;
alpha, beta, and gamma direct readings; exposure rate measurements.
Remediation and survey work was being completed concurrently with a Historical
Radiological Assessment (HRA). NWE co-authored the HRA with the Department of
the Navy’s Radiological Affairs Support Office (RASO). As additional buildings
and areas were identified through the HRA research as having been potentially
impacted, the scope of work was modified to include those areas.
Contract Value: $15 million
Removal / Replacement of Radioactively Contaminated Storm Drain Lines and Soils, Former Alameda NAS, Alameda CA
- Removed and replaced radioactively contaminated (Ra226) storm drain piping
- Removed radioactively contaminated (Ra226) “Abandoned Line” piping
- Hydroblast-cleaned and re-surveyed radioactively contaminated storm drain piping
- Reused clean soil for backfill
- Prepared, packaged and shipped materials to licensed disposal site (Envirocare)
Contract Value: $6 million
MARSSIM Surveys, Site Remediation, Ravenna Army Ammunition Plant, Ravenna, OH
- Performed Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM), NUREG-1575 surveys and sampling of outside ground areas that were previously contaminated with thorium containing monazite sand.
- Area surveyed and sampled was approximately 11,800 square meters in size.
- Remediated, packaged, removed and disposed of soils contaminated with thorium bearing (Th-232) monazite sand Preparation of work plans for the project included appropriate Health and Safety Plans, Quality Assurance Plans and Survey Plans. Survey plans were designed in accordance with MARSSIM guidance.
Contract Value: $1 million
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