Firing Range Remediation
Grand Canyon National Park, Arizona
Western Water & Land conducted a complete characterization and remediation of two small-arms firing ranges the National Park Service (NPS) at Grand Canyon National Park. The first phase of the project involved soil contaminant characterization of surface and subsurface soils. This was conducted by performing electronic metal scans followed by sampling and analysis of soils surrounding and within the target backstop berm. Western Water & Land determined that lead and other metal contamination was limited to the upper 18-inches of most soil horizons, and designed a remediation phase to collect and treat all contaminated soils.
The top 18-inches of soil was excavated and screened through vibrating screen decks. The ¼-inch plus fraction was then fed through a shaker-table separator to separate all of the coarse bullet fragments from the fine soil particulates. The fine soils were treated with a phosphate-based reagent to immobilize the fine fraction of lead and other metals in the soils. Testing of the resulting soil showed lead levels below EPA and Arizona soil screening Levels. The soils were then reused by the NPS to construct new, state-of-the art firing range backstop.
Grand Canyon National Park, Arizona
Western Water & Land conducted a complete characterization and remediation of two small-arms firing ranges the National Park Service (NPS) at Grand Canyon National Park. The first phase of the project involved soil contaminant characterization of surface and subsurface soils. This was conducted by performing electronic metal scans followed by sampling and analysis of soils surrounding and within the target backstop berm. Western Water & Land determined that lead and other metal contamination was limited to the upper 18-inches of most soil horizons, and designed a remediation phase to collect and treat all contaminated soils.
The top 18-inches of soil was excavated and screened through vibrating screen decks. The ¼-inch plus fraction was then fed through a shaker-table separator to separate all of the coarse bullet fragments from the fine soil particulates. The fine soils were treated with a phosphate-based reagent to immobilize the fine fraction of lead and other metals in the soils. Testing of the resulting soil showed lead levels below EPA and Arizona soil screening Levels. The soils were then reused by the NPS to construct new, state-of-the art firing range backstop.