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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QC standard for TSS
17537384
Posted: Monday, August 20, 2012 1:30 PM
Joined: 3/16/2012
Posts: 14


with the new Methods update Rule from May 2012, EPA established 12 QC guildlines for all methods, if they are not specific in the method.

 

One such method is 2540D, Total Suspended Solids.  I was curious what labs used for thier QC standard for this test.  I make a standard using cellulose to equal 100 mg/L - a lot cheaper than buying commercially prepared standards.


01753954
Posted: Wednesday, August 22, 2012 7:49 AM
Joined: 10/5/2009
Posts: 49


We make up a 100 ppm solution of diatomaceous earth, purchased as a reagent from one of the big lab suppliers (VWR, Fisher,...).

 

Chuck Lytle,

City of Portland, OR


01487708
Posted: Monday, October 29, 2012 11:25 AM
Joined: 10/12/2009
Posts: 11


Just to save you some grief, EPA did not mandate the 12 essential elements but relegated them to option 3 if a method lacks QC.  Then to top it off, they limited the whole section to chemcial methods so physical methods such as TSS are not included.