Toxicity
Testing (NPDES Permits)
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• Regulatory
Compliance Toxicity Testing (Acute/Chronic
Screening and Definitive Tests)
Because the pollutant-specific analytical
techniques for monitoring discharges have been deemed inadequate for insuring
the goals of the Clean Water Act (CWA), many industrial and municipal
dischargers are required to conduct aquatic toxicity tests on their
effluents. These toxicity tests, called
bioassays, utilize aquatic species as test organisms to determine the toxicity
of effluents being discharged into the environment. Bioassays measure the combined effects of constituent pollutants
and receiving waters on growth, reproduction and mortality.
AECT has highly qualified biologists and
technicians familiar with a variety of industrial and municipal waste
streams. We offer many types of
bioassays utilizing variety of test organisms.
In addition, AECT has refrigerated water samplers available
to our clients and we offer sample collection and/or sample pick-up services.
• Toxicity Identification Evaluations (TIE's)
• Toxicity Reduction Evaluations (TRE's)
When point-source effluents and discharges
fail to meet their required permit limits, regulatory agencies have asked
permittees to evaluate their effluents using a series of physical/chemical
fractionation and toxicity test procedures that isolate and characterize the
part(s) of the effluent which contribute to the toxicity of the whole effluent. These tests are called Toxicity
Identification and/or Reduction Evaluations (TIE's and TRE's). From these evaluations, permittees can
change their manufacturing and discharge processes to reduce the toxicity of
their effluent. AECT has
successfully performed TIE studies for our clients