WEF Discussions — Now on LinkedIn!

WEF is pleased to announce the creation of free LinkedIn groups associated with its technical discussion forum topics. Through these LinkedIn groups, members will be able to view and participate in discussions, as well as communicate with one another via direct messages. Share your experiences and knowledge, ask questions and respond to other discussions as frequently as you like!

You must have a LinkedIn profile to join a LinkedIn group; you can create your profile here. If you already have a LinkedIn profile, all you need to do is submit a request to join one or all of the following groups:

Water Environment Federation (Main) | Biosolids | Collection Systems | Nutrients | Stormwater 
Utility Management | Water Reuse | Water for Jobs | Watershed Management | Laboratory Practices 

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Surfactants in your wastewater possibly impacting whole effluent toxicity test
Posted: Friday, November 2, 2012 9:27 PM
Joined: 4/2/2012
Posts: 4

I'd like to connect with anyone that has issue regarding the subject matter.  Our NPDES permit requires the City to use T. gratilla, a sea urchin to test for the whole effluent toxicity test. Performance is best on how the in lab serial diluted wastewater compares with the controls (NOEC) and a significant difference results in a permit violation if it occurs before the dilution for our outfall.  We have gone through a Toxicity reduction evaluation plan documentation and performed the toxicity identification evaluation. All indications may point to anionic and nonanionic surfactant.  You can drop me an email at cjaramilla@honolulu.gov or call me at 808-768-3253.