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21 st Annual Conference

Learn about NZ Defense Force's approach to managing environmental issues at 29 small arms ranges, controlling contamination, erosion, and stormwater, with case study on Home Valley Range upgrade. Discover site-specific plans and proactive strategies for sustainable land management.

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21 st Annual Conference

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  1. 21st Annual Conference

  2. Living with Lead:Environmental Management of Active Small Arms Ranges Harley O’Hagan, NZ Defence Force Penny Kneebone, Tonkin & Taylor Ltd

  3. Overview • New Zealand Defence Force (Army, Navy, Air Force) • Joint Logistics & Support Organisation (JLSO) • Property Group • Environmental Services (8 civilian staff) • NZDF’s issues • 87,000ha estate • Sustainable land management • Services for Camps/Bases (water, waste, heat, etc) • Statutory planning • Consents & compliance • Environmental education • Contaminated sites

  4. Small arms ranges • Hand held firearms • Lead,copper, zinc, nickel, antimony • Ongoing source of contamination

  5. Typical layout

  6. Contamination at Ranges • Typical metal concentrations in stop butt sand (mg/kg)

  7. NZDF’s small arms ranges • 29 ranges • Coastal to central plateau • Various types, environmental settings

  8. Approach to management • Range similarities: overarching guideline • Differences: individual, site-specific plans

  9. Guideline document • Review international best practice • Overview environmental issues and management practices • Risk • Containment

  10. Containment • Stop butts • Operational controls

  11. Erosion control • Maintaining stable slopes • Minimising divots • Vegetated riparian buffer strips • Particle size distribution

  12. Stormwater and drainage • Cut off drains • Sedimentation basins

  13. Source control • Screening for safety • Small particles prone to leaching and transport • Best to contain source, rather than treat it • On-site disposal in engineered cells

  14. Site specific plans • Practical, user friendly, easy to read, minimise paperwork • Non-scientific language • Photographs and pictures • Clear, prescriptive instructions • Use existing maintenance systems • Consultation with users

  15. Home Valley Range upgrade • Waiouru Stream • Safety concerns • Frost heave • High intensity use

  16. Solutions implemented • Stop butts for containment • Free draining • Stormwater diversion • Collecting under-drainage • Capped stockpile • Culverting

  17. Conclusions • Ongoing source of metals contamination • Proactive approach - internal management Guidelines • Stakeholder consultation • Integrate with existing maintenance • Contain contamination, minimise amount of material generated • Environmentally sustainable design simplifies effective management of contamination

  18. 21st Annual Conference

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