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Craigmont Trap Range

EXECUTIVE SUMMARY

  • American Legion and Craigmont Lions Club would like to redevelop an existing trap range into a community baseball park via constructing an on-site lead-contaminated soil repository, they have developed and engineered an excavation plan to bury the contaminated soil and develop institutional controls to protect the repository for perpetuity
  • 2011-Awaiting results of simulated precipitation leaching test to quantify the leaching and adsorption potentials of lead in surrounding soil from University of Idaho, requested property specific funding determination
  • 2009- Targeted Brownfields Assessment (TBA) conducted to characterize lead contamination
  • Work funded by EPA through a TBA
  • Response actions ongoing

SITE HISTORY

The American Legion and Craigmont Lions Club have an interest in redeveloping the Craigmont Trap Range site for a community baseball park. The baseball field will be placed in the northeast corner of the property within the hay field portion of the site. The American Legion and Craigmont Lions Club are proposing to develop an on-site lead-contaminated soil repository.

 

A Targeted Brownsfield Assessment occurred from November 1, 2009 to November 4, 2009 with Ecology & Environment, Inc. (E&E) as EPA contractors. In order to assess the possible presence of contamination within the property boundary, 165 soil samples were screened in the field for metals with an XRF instrument. In addition, 63 soil samples were submitted for fixed laboratory analysis (E&E 2010).

The Nez Perce Tribe (NPT) Water Resources Division has requested to assist in locating an alternative source of funds for construction, facilitating the lead repository permitting process, developing a stormwater pollution prevention plan, and verifying the cleanup process at the Craigmont Trap Range property located on the Reservation at Craigmont, Idaho.

The American Legion site is located in Craigmont, Lewis County, Idaho. The site has been used as a trap shooting range since it was purchased by the American Legion in 1936. The property is currently an undeveloped open grassy area that is bordered by A Street to the west, US-95 to the south, and East Lorahama Street to the north. East of the site is an agricultural field currently used for production of hay. No surface water features are located on-site (E&E 2010).

The shooting range fallout area extends into the adjacent hay field east of the range. Recently, the hay field was donated to the American Legion. The site is relatively flat and covered by grass. The areas of potential concern are the shot fallout range that extends out approximately 300 to 700 feet from the trap house in a horizontal plane with a 45 degree arc. Environmental concerns at the site are those common to small arms firing ranges and include potentially contaminated soil. Contaminants of concern include lead, arsenic, antimony, copper, tin, and various explosive residues (E&E 2010).

The X-ray fluorescence (XRF) screening and fixed laboratory sample results revealed that the majority of the exceedances encountered on site are located in the southeastern portion of the site beginning approximately 300 feet south east of the trap house. This information is in agreement with the technical/regulatory guidelines put forth by the Interstate Technology and Regulatory Council Small Arms Firing Team within the Characterization and Remediation of Soils at Closed Small Arms Firing Ranges guidance (ITRC 2003). This guidance states that most shot fall lands approximately 375 to 770 feet downrange of the trap house, with a 45 degree arc (E&E 2010).

Fixed laboratory sample results indicate the presence of lead in surface and subsurface soil samples above criteria values at 15 locations. XRF and fixed laboratory TAL metals results showed an acceptable correlation during the linear regression analysis. Therefore, XRF field screening achieved the objective of identifying areas of contamination and of determining the extent of contamination (E&E 2010).