Water Quality

AquAeTer’s technical experts are known for their expertise based on over 30 years of experience in water quality studies.

Water quality remains a top priority with Federal, state, and local agencies. As agencies attempt to reduce loading to streams, it is important to know what impact your facility has on the receiving stream and what other sources may be affecting the stream. AquAeTer’s technical experts are known for their expertise based on over 30 years of experience in water quality assessments. AquAeTer can provide a full range of services to meet your water quality needs including independent review of models, optimizing discharge through more efficient diffusers, conducting water quality monitoring, and developing a TMDL or contaminant transport model for submittal to the agencies.

Case Studies
Mixing Zone
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AquAeTer conducted mixing zone studies for color and for temperature in the tidally-influenced Turtle River. Two studies were conducted to determine effluent dispersion from an aerated stabilization basin (ASB) discharge through a multi-port, high-rate diffuser and the dispersion from a once-through cooling water discharge from a submerged single-port diffuser. Water quality samples and measurements were taken at 1/8 tidal periods over a tidal period.
Monitoring
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AquAeTer has conducted ongoing water quality monitoring for a pulp and paper mill located in Valliant, Oklahoma as part of the Mill’s NPDES permit requirements. Four low-flow events were required. For each study, four stations were set up at specified locations over approximately 44 river miles on the Red River. Water quality was monitored at each station for one week.
TMDL
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AquAeTer conducted a nutrient total maximum daily load (TMDL) study on the Arkansas River near Muskogee, Oklahoma. Wasteload allocation studies were conducted on a river/lake system that was highly influenced by both upstream and downstream hydroelectric-generation dam releases. Water quality, hydrologic, hydraulic, bathymetric, biological and chemical data were collected on the River.
Use Attainability
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AquAeTer is currently involved in performing a use attainability analysis for Coffee Creek and Mossy Lake. AquAeTer has conducted Total Maximum Daily Load studies including CBODu, nutrient analyses, total chlorophyll analyses, and monthly 7-day 10-year (Q7-10) low flow analyses. Additionally, AquAeTer has conducted biological inventories and regular water quality data collections on the Ouachita and tributaries in support of the facility’s NPDES Permit.
Wasteload Allocation
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A wasteload allocation study was conducted to determine the Total Maximum Daily Load of the Conecuh (AL)/Escambia (FL) River that flows into Pensacola Bay. USEPA, Region 4 and the Florida Department of Environmental Protection (FDEP) prepared a nutrient TMDL for Escambia Bay and cited the pulp and paper mill and the City of Brewton, located in Alabama, as major contributors of nutrients to Escambia Bay, located in Florida.

Water Quality Services

  • Bench and Pilot Scale Studies
  • Bioaccumulation Assessments
  • Biological Surveys
  • Diffuser Designs
  • Ecological Risk Assessments
  • Mixing Zone Determinations
  • Mixing Zone Modeling and 3rd Party Review of Models
  • Non-Point Source Investigation
  • Permitting
    • NPDES Permitting
    • TiStormwater Discharge Permitting
  • Stormwater Management
  • Total Maximum Daily Load (TMDL) Determinations
  • Use Attainability Analyses (UAA)
  • Water Quality Measurements
  • Water Quality Modeling and 3rd Party Reviews
  • Watershed Management Planning