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Table 1. Summary of Known (or Potential) Waste Streams and Proposed Management Known or Known or Anticip- Constituents of Proposed Management Potential Waste ated Location of Concern Stream Environmental Contamination Hydrocazbon or Known contaminated BTEX, MTBE, TPH or Segegate from non- gilsonite contaminated soils in the north half of other diesel or gasoline impacted materials and soils Subazea 3. Previously range hydrocarbons, manage per specific undetected pockets SVOCs and RCRA managemenddisposal plan potentially exist metals. included in Appendix A. throughout gravel lease area Impacted discharge Potentially generated BTEX, MTBE or other Pump to newly constructed water from gravel throughout gravel lease diesel or gasoline range oxidation /aeration basin mining operations area where dewatering is hydrocarbons, SVOCs (initially within the boundary required and RCRA metals of Evaporation Pond 9) for treatment and subsequent dischazge according to Dischaz a Permit. Free product (crude North of gravel lease BTEX, TPH. Install and maintain head in oil) on water table. area near former settling barrier trenches 1 & 2 prior ponds (in the area of to mining, per mining plan. WP3, MW-2 and MW- 4). Solid waste (e.g. scrap Potentially exists Not applicable Collect and recycle locally, metals, tires, scrap throughout gravel lease dispose at approved solid lumber) azea waste facility, or seek approval for on-site disposal through proper regulatory channels. ACBM (e.g. asbestos Historic asbestos landfill Asbestos Do not disturb and maintain containing tiles, pipe suspected near a 200ft buffer of non- insulation or other northernmost comer of intrusive activity around construction debris gravel mining lease area landfill. If other asbestos is encountered, stop and notify CDPHE-HMWMD. Do not disturb. Hazardous waste or Not anticipated to be RCRA listed or RCRA Seek contained-out hazardous waste- encountered following characteristic wastes determination using Division contaminated media certified clean closure of guidance and, if successful, (soil or water). Oxidation Ponds 1-3 and dispose of as a non- associated ditches hazardous waste, or properly package, label & transport to an approved Subtitle C facility within regulatory timeframe.