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Perimeter Sampling ResultsFormer Louisiana Army Ammunition Plant

Camp Minden, LA

13 June 2017

LTC James Crowley

Army National Guard Cleanup Branch Chief

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PurposePresent results of the 2017 perimeter groundwater andsurface water sampling performed at the former LouisianaArmy Ammunition Plant (LAAP) now Camp Minden, LA

Agenda• LAAP History• Environmental areas of interest• Environmental activities timeline• Off-post sampling request• Area P past conditions• Conceptual site model• Off-post sampling timeline• LAAP perimeter sampling and results• Path Forward

Purpose & Agenda

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• In 1941, the US Army acquired property to create theLouisiana Army Ammunition Plant (LAAP) tomanufacture ammunition, which the US Army and itscontractors continued intermittently to 1994

• In 1989, LAAP was added to the National Priorities List(NPL)– Environmental contamination from historic operations is

addressed under the Comprehensive Environmental Response,Compensation and Liability Act (CERCLA)

– US Environmental Protection Agency and LouisianaDepartmental Quality (LDEQ) are the regulatory partners underCERCLA

LAAP History

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• In 2005, LAAP was transferred from the US Army to theState of Louisiana and renamed Camp Minden– The US Army retains financial responsibility for all LAAP

CERCLA actions

– Louisiana Military Department (LMD) runs Camp Mindenoperations

• Headquarters Army National Guard (HQ-ARNG)executes CERCLA at areas of interest throughout LAAP

LAAP History

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Environmental Areas of Interest

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Environmental Activities Timeline

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• During the 2015 Five-Year Review (5YR), the publicraised concerns regarding the potential for off-postmigration of constituents of concern via groundwater andsurface water

• Community concerns related to:– Continuing on-post constituents entering surface water

– Past environmental conditions at Area P that may have led to off-post migration in groundwater

– Past off-post drinking water assessments and the need fordrinking water testing

Off-Post Sampling Request

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Area P Past Conditions

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Area P Current Conditions

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Conceptual Site Model

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Past Drinking Water Sampling

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• In early 2017, HQ-ARNG, in coordination with LMD, theUS Environmental Protection Agency (USEPA), andLouisiana Department of Environmental Quality (LDEQ),collected samples from:

• Samples were analyzed for (83 constituents):– Volatile organic compounds (fuels, solvents, and other sources)

– Semivolatile organic compounds (explosives degradationproducts)

– Explosives

– Perchlorate

LAAP 2017 Perimeter Sampling

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– 8 public supply wells

– 6 private wells

– 3 on-post water supply wells

– 4 on-post perimetermonitoring wells

– 2 perimeter surface waterdrainages

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LAAP Perimeter Sampling

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Perimeter Sampling Results

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Class of Compound Detected Constituents Potential Sources

ExplosivesAssociated with Area P

2,4,6-Trinitrophenol (Picric Acid)m-Nitrotoluene (Explosive)RDX (Explosive)

Explosives and solvents are known tooccur in groundwater at Areas of Interest,including Area P, at LAAP

Volatile CompoundsAssociated with LAAPand Non-Military Sources

BenzeneEthylbenzeneXylenesTolueneMethyl tert-butyl ether (MTBE)Trichloroethene (solvent)

Fuel compounds have only been found atArea B at LAAP.Trichloroethene has been found at AreaP and the Y-Line at LAAP.All of these compounds are prevalent atleaking underground storage tanks sites,such as service stations and those foragricultural or private use

Volatile CompoundsNot Associated withLAAP

Bromodichloromethane*Bromoform*Chloroform*Dibromochloromethane*

Carbon disulfide**Chloromethane**

*Byproduct of chlorination/chlorinedisinfection in drinking water (also knownas trihalomethanes or THMs)

**Common laboratory contaminants,solvents used in laboratory samplepreparation

Propellants Perchlorate Associated with fireworks, propellants,also occurs naturally

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Laboratory Data Qualifiers

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• Under CERCLA requirements, laboratory data must be reviewed by a Data QualityChemist to assure that procedures were followed, and, ultimately, that the data areuseable for their intended purpose.

• In this process, the Chemist may note additional information to explain commonlaboratory occurrences.

These notations may include the following:

Data Qualifiers

• D = A secondary dilution of the sampled occurred

• J = Estimated value

• M = Manually integrated concentration

• Q = Quality control out of range

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Perimeter Sampling-Explosives

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all concentrations inmicrograms per liter (µg/L)

duplicate sample resultsshown in parentheses

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Perimeter Sampling-Fuels and Solvents

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Perimeter Sampling-Other VOCs

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all concentrations inmicrograms per liter (µg/L)

duplicate sample resultsshown in parentheses

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Perimeter Sampling-Perchlorate

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all concentrations inmicrograms per liter (µg/L)

duplicate sample resultsshown in parentheses

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Path Forward

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• Resample drinking water wells to learnmore about results

• Off-site groundwater investigation

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Questions

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Questions

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Acronyms and Abbreviations

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• CERCLA – Comprehensive Environmental Response, Compensation andLiability Act

• HQ-ARNG – Headquarters Army National Guard

• LAAP – Louisiana Army Ammunition Plant

• LDEQ – Louisiana Departmental Quality

• LMD – Louisiana Military Department

• MTBE – Methyl Tert Butyl Ether

• ND – Not Detected

• NPL – National Priorities List

• RDX – Royal Demolition Explosive

• THMs – Trihalomethanes

• USEPA – US Environmental Protection Agency

• 5YR – Five-Year Review