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Cleanup and Closure Design of a Former Shooting Range and
Landfill in Adams County
Colorado SWANAOctober 1, 2019
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Agenda► SITE HISTORY
► LEAD REMEDIATION WORK
► LANDFILL CLOSURE• AGENCY COLLABORATION AND VALUE ENGINEERING
• BENEFICIAL REUSE OF LANDFILL USING SOLAR
• WHAT WE LEARNED FROM LEAD REMEDIATION
• BRACKETING THE UNKNOWNS
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“Old” Shooting Range Landfill
Shooting Range Landfill
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Timeline of Site Development
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Pre-Remediation Property Conditions
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Preparatory Activitieso Blowdown and Abandon 4” O&G
Pipeline
o Abandon Texas Tea O&G Production Well
o Relocate United Power Poles
o Abandon Commercial Well
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Firearms Training Facilities (Lead-impacted Soil)
South Range North Range
SWAT Training Area Tactical Training Area
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Structures And Debris Piles
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Site Characterization Activities
o 30” CMP integrity
o Groundwater flow direction
o Shallow and deep groundwater quality (onsite and offsite)
o Surface water quality
o Landfill gas – VOCs (TO-15)
o Soil and sediment
Shooting Range COCs
o Waste limits
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Site Plan
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Site Layout Landfill Limits
North Range
Soil Placement Area
Texas Tea O&G Well
South Range
30” CMP
Waste Tires
South RangeSafety Fan
Anadarko O&G Pipeline
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Site Characterization Summary
WASTE MATERIAL DISPOSITION
2,158 cy of Excess-Risk Soil and Bullet Piles
Screen and Treat, then Soil Placement Area
700 cy of Munitions Debris Soil Soil Placement Area
13 Structures (1 with ACM) Off-Site Permitted Landfill
Asphalt and Concrete Range Floor (South Range)
Soil Placement Area
Miscellaneous Debris Piles Off-Site Permitted Landfill
Waste Tires Tire Recycler
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South Range Design Cut Depths
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Remediation – Main Elements
o Establish stormwater BMPs
o Remove RBMs from structures and recycle
o Demolish and remove structures
o Pump out septic tank and abandon in place
o Surficial lead recovery from South Range Safety Fan
o Excavate soils under cap to EPA Industrial Risk Regional Screening Levels (RSL)
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Remediation – Main Elements (Cont.)o Excavate soils not under cap to Residential RSL
o Screen lead and recycle
o Stabilize Excess Risk Soils
o Consolidate treated soil and MD soil in Soil Placement Area
o Remove debris piles
o Demolish South Range pavement and consolidate in Soil Placement Area
o Temporary soil cover over Soil Placement Area
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Overview Of Soil Remediation
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Final Soil Placement Area
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Final Remediation VolumesWASTE MATERIAL DISPOSITION
2,200 cy of Excess-Risk Soil and Bullet Piles
Screen and Treat, then Soil Placement Area
700 cy of Munitions Debris Soil Soil Placement Area
13 Structures (1 with ACM) Tower Road Landfill
Asphalt and Concrete Range Floor (South Range)
Soil Placement Area
360 cy of Railroad Ties and Power Pole Debris
Various Recyle/Disposal Facilities
6,600 Waste Tires GeoCycle LLC, Colo. Spgs.
40,108 lbs Bullet Lead40,600 lbs Scrap Iron
Three Sisters Trading, LakeForest, IL
23 Drums of Investigation Wastes Soil Placement Area6 Drums treated first
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Landfill Closure► Agency Collaboration And Value Engineering
• Recreating Historic Drainage Through Site
• Onsite Waste Relocation
• Landfill Cover Material
► Beneficial Reuse Of Landfill Using Solar
► What We Learned During The Lead Remediation• Asbestos Containing Material (ACM) Present
• Literally Lead Everywhere
► Bracketing The Unknowns• Swale Alignment Borings
• Waste Test Pits
• Material Management Plan
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Recreating Historic Drainage
Todd Creek Farms Subdivision
► ~150 acre watershed
► ~142 cubic feet per second (cfs)
• 100-year, 24 hour storm event
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Grading and Site Plan
► Potential to bore new storm drain
► Excavating waste to create channel for stormwater
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Landfill Cover Material► Adams county animal shelter project
► Source for Water Balance Cover material
Shooting Range Landfill
Animal Shelter Property
Approx. 3.5 miles
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Landfill Cover Material► Flatrock Training Center
► Source for geosynthetics subgrade and cover material
Shooting Range Landfill
Flatrock FacilityApprox. 14 miles
Stockpile
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The Solar Six► Colorado school of mines capstone
design project• Landfill cover system analysis
• Solar support system analysis
• Solar racking system analysis
• Solar efficiency analysis
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Landfill Cover with Solar Design
Colorado School of Mines Capstone Project
Future Solar Developer
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Grading Plan with Solar Areas ► 1-2 MW solar farm
► Potential for battery storage
► Access to United Power infrastructure
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► Asbestos Containing Material (ACM)
► Lead Everywhere
What We Learned From the Lead Remediation
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► Site Assessment and Closure Plan Report
► Storm Drainage Swale Test Pits
► Storm Drainage Swale Alignment Borings
► Materials Management Plan
► ACM Areas Map
Bracketing the Unknowns
► Communication with Adams County and CDPHE on findings• Discuss next steps and options
► Making sure construction documents account for discovering the unknown
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Landfill Closure and Solar Reuse Design
Community and Economic Development
Landfill Cover CQA Asbestos Monitoring
Solid Waste RCRA
Hazardous Materials and Waste Management Division
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Landfill Closure and Solar Reuse Construction
Community and Economic Development
Landfill Cover CQA Asbestos Monitoring
Solid Waste RCRA
Hazardous Materials and Waste Management Division
Landfill Closure Construction
AMERESCOSolar Farm
Development
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Drone Site Photo
Photo Credit: Iron Woman Construction
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Site Renderings
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Site Renderings
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Site Renderings
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Site Renderings
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Questions?Joshua Lee, PE
Senior Civil EngineerBurns & McDonnell Engineering
John Dellaport, P.E., P.G.Environmental Div. Manager
Quantum Water & [email protected]
720-524-4294
Chris Krajicek, P.G.Project Manager
Quantum Water & [email protected]
720-524-4294
