Direct Toxicity Assessment (DTA)
DTAs measure the toxicity of a complex industrial effluent
discharged to controlled waters. The resulting data is used to
predict any risks to the aquatic environment.
DTA is a mandatory requirement of the EC Directive on
Integrated Pollution Prevention and Control (IPPC) and is
implemented by the Environment
Agency.
We have taken part in all DTA proficiency schemes organised
by the Environment Agency, gaining approval for all five accredited
methods annually since the programme began in 2006.
With several years' experience within our highly skilled team,
plus our Environment Agency mCERTS (Monitoring Certification
Scheme) approved laboratory for DTA testing, we have a long track
record of routinely conducting DTA studies to the highest standards
for a variety of industry-based customers.
What we offer
Testing of discharges to marine waters
|
Species
|
Duration of study (hours)
|
Endpoint
|
|
Algae
Skeletonema costatum
|
72
|
growth inhibition
|
|
Invertebrate
Tisbe battagliai (benthis copepod)
|
48
|
mortality
|
|
Invertebrate
Crassostrea gigas (Pacific oyster)
|
24
|
larvae development
|
|
Fish
Scophthalmus maximus (turbot)
|
96
|
mortality
|
Testing of discharges to freshwater
|
Species
|
Duration of study (hours)
|
Endpoint
|
|
Algae
Pseudokirchneriella subcapitata
|
72
|
growth inhibition
|
|
Invertebrate
Daphnia magna (cladoceran)
|
48
|
immobilisation
|
|
Fish
Oncorhynchus mykiss (trout)
|
96
|
mortality
|
More information may be found: