Water Quality and Contaminants

LGL Limited and MacDonald Environmental Sciences Ltd. (MESL) are pleased to announce a joint working agreement. The agreement sees LGL acquiring key MESL staff members Jesse Sinclair and Allison Schein. This added capacity and expertise will broaden our services in the realm of Aquatics & Water Quality, while at the same time, LGL and MESL will continue to join forces to meet the needs of our mutual clients. 

Scientists from LGL have expertise related to:

  • Eutrophication and nutrient issues in aquatic systems
  • Mercury, cadmium, selenium and other metal contaminants
  • Polycyclic aromatic hydrocarbons and polychlorinated biphenyls
  • Acid rock drainage and metal leaching
  • Hydrocarbon and other organic contaminants
  • Sediment loading from erosion
  • Water balance modeling and contaminant mass balance modeling
  • Characterization of physical characteristics such as temperature, salinity, conductivity, and dissolved oxygen
  • Effects of contaminants on human and environmental health

Objectives of our investigations commonly include:

  • Environmental impact evaluation
  • Mine planning and remediation
  • Lakeshore development planning
  • Sediment control mitigation
  • Restoration of aquatic habitats
  • Aquaculture impact evaluation and planning
  • Evaluation of human health concerns
  • Inventory and basic characterization of lakes and streams

Specialized methodologies:

  • Development of water quality standards and guidelines (general and site-specific)
  • Establishing tissue-residue benchmarks for dioxins/furans in fish 
  • Acute and chronic toxicity testing
  • “Clean” sampling of water, biota, and sediments for contaminant measurement
  • In situ measurement of aquatic physical and chemical parameters
  • Statistical analysis and interpretation of contaminant concentration information
  • Measurement of chlorophyll and other indicators of primary productivity
  • Identification of phytoplankton and zooplankton as indicators of water quality
  • Sediment control strategies as part of aquatic habitat restoration
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