Longhorn Army Ammunition

Plant

Water Quality Update

and Upcoming Army

Documents

George Rice

October 17th, 2012

Update of Water Quality

Issues Discussed in Last Talk (April 2012)

Contaminants at LHAAP

Explosives

• TNT

• DNT

• Perchlorate

Solvents

• TCE

• DCE

• Methylene Chloride

Metals

• Arsenic

• Lead

• Thallium

Analyses of Public Supply Wells (2006, 2009, 2010)

• No solvents (e.g., TCE, methylene chloride) or

explosives (TNT, DNT) detected

• No perchlorate analyses

Electrical Conductivity

Contaminated Groundwater

VS

Caddo Lake Water

Upcoming Army Documents

Five Year Reviews

• After Remedy Put in Place

• Evaluate Effectiveness of Remedy and Need for

Continued Monitoring

o Monitored Natural Attenuation (MNA)