Fort Detrick Installation Restoration Program Area B Groundwater November 1, 2010 Fort Detrick, Maryland A Sustainable Community of Excellence

Purpose Provide an overview of the Area B Groundwater workplan investigation Give the public an opportunity to ask questions Fort Detrick, Maryland A Sustainable Community of Excellence

History/Status Many groundwater investigations have occurred at Area B since Ft. Detrick held ongoing partnering meetings with EPA and MDE to identify the data needs to define the nature and extent of groundwater contamination and assess risk. The Area B Groundwater RI Work Plan was finalized in July Fort Detrick, Maryland A Sustainable Community of Excellence

Work Plan Objectives Objective A: Confirm Groundwater Flow Direction – The overall groundwater flow directions within the shallow and deep flow components and in wet/dry seasons will be established so that the adequacy of the well network can be evaluated and improved as needed Objective B: Determine Depth of Contamination and Groundwater Flow – The depth of contamination and the extent to which groundwater underflows Carroll Creek will be determined Objective C: Establish Appropriate Monitoring Network – An appropriate monitoring network will be evaluated and developed to characterize the nature and extent of contamination, evaluate risk to on- site and off-site receptors, and monitor the Area B disposal areas (B-2, B-3, B-6, B-8/10/11, and B-18) 4 Fort Detrick, Maryland A Sustainable Community of Excellence

Work Plan Objectives (Continued) Objective D: Obtain Appropriate Analytical Data Set – A current, representative data set that evaluates site-specific contaminants and meets risk assessment data quality objectives will be collected Objective E: Assess Vapor Intrusion – Identify what buildings may pose a vapor intrusion risk and collect samples to assess such risk 5 Fort Detrick, Maryland A Sustainable Community of Excellence

Major Activities in Work Plan Horizontal Flow Meter Survey Spring/Seep Sampling Focused Dye Trace Study Drive Point Technology (DPT) Sampling and Piezometer Installation Installation of New Wells Borehole Logging of New Wells and Select Existing Wells Monitoring of Water Levels Groundwater Sampling (Two Events) Surface Water and Sediment Sampling (Two Events) Vapor Intrusion Sampling Partnering with regulators throughout the entire process 6 Fort Detrick, Maryland A Sustainable Community of Excellence

Residential Well Testing Requests Residential Well Testing Requests. – Conducted sampling at over 70 residential wells. – Tested 29 wells since June – Results have been shared with MDE and EPA. – All current results are non-detect for VOCs associated with Fort Detrick. Fort Detrick, Maryland A Sustainable Community of Excellence

Historical Residential Well Sampling Locations Fort Detrick, Maryland A Sustainable Community of Excellence

Residential Well Sampling Locations June 2010-Present Fort Detrick, Maryland A Sustainable Community of Excellence

For More Information Please contact the Fort Detrick Public Affairs office at: U.S. ARMY GARRISON PAO 810 Schreider Street Fort Detrick, Md., Toll Free: Local: Fort Detrick, Maryland A Sustainable Community of Excellence

Slides for discussion purposes Fort Detrick, Maryland A Sustainable Community of Excellence

Horizontal Flow Meter Survey Locations 12

Springs/Seep Survey Area Groundwater Flow Direction 13

Focused Dye Trace Locations Groundwater Flow Direction 14

Proposed DPT Sampling Locations Groundwater Flow Direction 15

New Monitoring Well Locations Groundwater Flow Direction 16

Borehole Logging Locations Groundwater Flow Direction 17

Water Level Monitoring Locations Groundwater Flow Direction 18

Groundwater Sampling Locations Groundwater Flow Direction N * Note: Sampling locations are shown in multiple colors 19

Surface Water/Sediment Sampling Locations Groundwater Flow Direction 20

Vapor Intrusion Investigation Locations Groundwater Flow Direction 21

Interview Project Fort Detrick, Maryland A Sustainable Community of Excellence The Army is interested in interviewing former employees and individuals that have historic knowledge of past activities at Fort Detrick. A contract is underway to arrange and conduct interviews. Public Website and Hotline Telephone number www.detrickcommunity.com A contractor will be conducting interviews in person as well as by phone beginning in November. A draft report is tentatively scheduled for December 2010.