COL Roger A. Wilson, Jr. -...
Transcript of COL Roger A. Wilson, Jr. -...
Former Nebraska Ordnance Plant, Mead NEFormer Nebraska Ordnance Plant, Mead NE
Information Briefing for:
Big Sandy Lake Homeowners Assoc.
March, 30 2009
Briefing Prepared by USACE – Kansas City District
Building StrongBuilding StrongFormer Nebraska Ordnance Plant, Mead NE slide # 2
AgendaAgenda• Opening Remarks• History of NOP• Investigations and Record of Decision• Current and Future State of the Remedy
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History of NOPHistory of NOP• 1942 to 1945 - Operating period in support of WW II• 1945 - NOP placed on inactive status• 1946 to 1949 - Explosive storage without production• 1952 - NOP reactivated for Korean Conflict• 1956 - NOP placed on standby status• 1959 - NOP declared excess, transferred to the GSA• 1960 - USAF constructs Atlas Missile Launch Facility
(Atlas Missile Area) at NOP• 1962 – U. of Nebraska purchases 9,600 acres of NOP• 1964 - Atlas Missile Area abandoned
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History of NOPHistory of NOP• Construction of the NOP began in early 1942 and
took approximately 9 months. NOP Site occupied approximately 17,250 acres.
• The National Defense Corporation operated the plant from 1942 to 1945 in support of World War II mission. In 1945, World War II operations were terminated and the NOP was placed on inactive status.
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History of NOPHistory of NOP• Load and Pack Facility: Bombs, shells and rockets
were assembled at four individual bomb load lines.
• Other facilities on-site included a proving range, a landfill, a wastewater treatment plant, analytical laboratories and storage and administration facilities.
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History of NOPHistory of NOP• During the 1950’s and early 1960’s, the US Air
Force operated an Atlas Missile Launch facility. The Atlas Missile Area was abandoned in 1964.
• In 1962, the University of Nebraska purchased approximately 9,500 acres of the Former NOP site for their agricultural research and development site.
• The remaining land from the Former NOP was purchased by private individuals and light industry.
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Former Nebraska Ordnance Plant, Mead NE Briefing for COL Pease, OACSIM – 3 MAR 2009 slide # 16
Worst job at NOP?
Investigations & RODInvestigations & ROD• 1983 - Archive Records Search, USATHAMA (now AEC)• 1989 - Initial investigation by USACE• 1990 - NOP added to National Priorities List• 1990 to 1992 – Remedial Investigation and supplemental
investigation efforts for soil & groundwater• 1992 - Interagency Agreement (now Federal Facilities
Agreement) signed• 1995 – Operable Unit 1 (OU1) Record of Decision signed• 1996 - Initiation of the Restoration Advisory Board• 1997 - OU2 Record of Decision signed
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Current State of the RemedyCurrent State of the RemedyOU1 Record of Decision– Excavate explosives contaminated soil – 17,000 yd3
– Incinerate on-site & backfill (controversial with the RAB, at the time)
• 1995 – OU1 Remedial Action start• 1997 – OU1 Remedial Action complete
OU1 Present Status = Remedy Complete (i.e. closed-out)
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater
• 1997 Record of Decision
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Contaminants of Concern (CoCs)
Groundwater Clean-Up Goals (ug/L = ppb)
Methylene Chloride 51,2-Dichloropropane 5
TCETCE 55TNB 0.778TNT 2
2,4-DNT 1.24RDXRDX 22
TCE and RDX TCE and RDX are the most are the most widespread widespread contaminantscontaminants
Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater • 1997 Record of Decision (ROD) calls for
– Hydraulically contain contaminated groundwater– Focused extraction in areas with relatively high
concentrations of trichloroethene (TCE) and explosives.– Treat all extracted groundwater– Dispose of the treated groundwater by beneficially
reusing it or through surface discharge.– Provide a potable water supply to users whose water
supply contains RDX or TCE
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• 1997 - 2 extraction wells and Main Groundwater Treatment
Plant construction start, under Removal Action (allows for start before Final Remedial Design complete)
• 1999 - Final Remedial Design complete• 1999 - Remedial Action start (additional extraction wells
and expansion to Main Treatment Plant)• 2003 - Additional investigation in LL1 (due to unexpected
high concentrations in EW-11)• 2005 - LL1 Treatment Plant Design completed• 2006 - LL1 Treatment Plant operational
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• 2007 – Containment Evaluation for CY2006 indicates future
loss of containment – call for new EWs 14 & 16
• 2007 – Design for AOP Treatment Plant complete
• 2008 – AOP Treatment Plant construction complete
• 2008 – Design for new extraction wells EW14 & 16
• 2008 – Design for new focused extraction well EW-15
• 2009 – EW 14, 15, 16 installation complete
• 2010 – LL4 Treatment Plant construction complete
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Current State of the RemedyCurrent State of the RemedyOperable Unit 3
– Control and remediation of an onsite landfill and other disposal areas not identified at the signing of the IAG.
Military Munitions Response Program – Currently under recurring reviews (every five
years) and in the process of determining path to achieve a no further action decision document.
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10975 EL MONTE, SUITE 100OVERLAND PARK, KANSAS 66211
N
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1997 SITE MAP1997 SITE MAP
Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Current Operations – 5.5 MGD
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Main Treatment Plant- EWs #1 to 10*- 2400 gpm (3.4 MGD)- EWs 2, 5 & 8currently off-line
- Activated Carbon- Beneficial Re-Use oftreated water
LL1 Treatment Plant- EWs #12 & 13*- 600 gpm (0.86 MGD)- EW-13 currentlyoff-line
- Air Stripper
AOP Treatment Plant- EW-11- 550 gpm (0.79 MGD)- Advanced OxidationProcess (hydrogenperoxide & ozone)
- Treated water goes toMain Treatment Plantfor polishing
gpm = gallons per minute
MGD = Million Gallons per Day
Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Annual Groundwater Monitoring Program (GMP)
– Sampling program reviewed each year
– Document compliance and successful containment
– Includes surface water monitoring
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24 Surface Water Locations24 Surface Water Locations
Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater
• Alternate Water Supply (see Site Map)
– 5 residences currently receive bottled water and activated carbon treatment
– Every residence within 0 to ½ mile sampled 2x per year
– Every residence within ½ to 1 mile sampled 1x per year
– Buffer Zone sampling began 2004
– To date, no exceedences found
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67 Private Water Supply Wells67 Private Water Supply Wells
Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater
• Investigations subsequent to the ROD– Periodic need for focused investigations
– To confirm extent of contamination and plume dimensions
– TRIAD approach – dynamic sampling plan and field based testing
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Hydraulic Containment
– Annual Containment Evaluation report – prior year data
– Based on chemical and hydraulic data
– Uses groundwater model to predict performance
–– 2006 Containment Evaluation Report 2006 Containment Evaluation Report –– indicated indicated gaps and possible future loss of containmentgaps and possible future loss of containment
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Hydraulic Containment
– Corrective Actions• Design new extraction wells – EWs-14 & 16 to fill the gap
• Further investigate east side
• Further investigate west side – LL1
– Results• Eastern side found to be containment (better understanding of
groundwater/surface water interactions)
• West side found to be in containment (contamination not found)
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Source Zone Treatment & Reduced Restoration Time
– Estimates show majority of plume(s) being remediated within 30-40 years
– Areas of high concentration still remain
– Possible DNAPL – potential subject of future investigation
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Current State of the RemedyCurrent State of the RemedyOU2 – Site-Wide Groundwater• Source Zone Treatment & Reduced Restoration Time
– 1 new focused extraction well (EW-15) being installed right now
– Cost To Complete (CTC) includes 4 additional focused extraction wells (actual locations to be based on modeling)
– PDT (USACE and EPA) currently exploring other possible technologies (in-situ) besides additional extraction
– Actively looking for ways to reduce overall CTCFormer Nebraska Ordnance Plant, Mead NE slide # 44