Norwest: Environmental Assessment


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Environmental Assessment Overview Surface and Groundwater Hydrology Water Control and Management Water Permitting and Complicance Environmental Assessment	Home > Our Services > Water Resources > Environmental Assessment Environmental Assessments That Benchmark Your Projects Surface water and groundwater investigations are critical components required for environmental assessments of resource development projects. Our services include baseline characterization and impact evaluation, soil and groundwater remediation, baseline monitoring, and groundwater fate and transport modeling. With combined strengths in hydrology and engineering, we look for cost effective measures to reduce or eliminate unfavorable impacts. Norwest has provided Phase 1 and Phase 2 environmental site assessment services on behalf of both sellers and potential purchasers of industrial property since the mid-1980s. Our involvement with such clients includes carrying Phase 1 and Phase 2 assessments forward into remediation design and implementation. This broad background allows us to offer a deeper perspective on environmental assessments than many consultants focused solely on documentation alone. Our services include: Environmental Impact Assessments Environmental Impact Statements Risk Assessments - Phase I and II evaluations Regulatory Compliance and Due Diligence Audits Soil and Groundwater Remediation Soil Vapor Extraction Chemical Oxidation In-Situ Bioremediation Groundwater Pump & Treat Containment and Barriers Landfarming RCRA/CERCLA Regulatory Support MTBE Characterization and Remediation Monitored Natural Attenuation Support Expert Testimony Groundwater Fate & Transport Modeling Alternate Concentrations Limit Petitions Health and Safety Compliance	Case Study: Water Mgmt. Mine Water Management & Stability Control Situation: Norwest consulted with a mining company that had been experiencing two separate instances of localized instability within a mining area. The first area was characterized as a creep type dump failure caused by placing waste material on what proved to be a weak foundation layer. The second area was characterized as a block type wall failure, which occurred along a weak “aqua putty” layer within the coal seam. Norwest quickly engineered a creative modification to the mine plan to allow for continued mining within the pit. Solution: Norwest developed long-term remediation plans to mitigate the pit wall instability, which included detailed mining and water management plans and permit application submittals. The wall failure remediation plan required mining through two large sediment ponds located in series near the edge of the mine pit backfill, allowing for the pit wall angle to meet the stability requirements. After removing the weak aqua putty layer, a buttress of overburden material was placed to allow the replacement ponds to be reconstructed on a stable backfill surface. An interim water management plan allowed the ponds to be temporarily removed from service during the seasonal dry period. read more>>
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