Re: [DCHAS-L] Hydrofluoric acid solution neutralization...

Hello 

I think there are at least 3 considerations in determining the treat ability of this waste.

Federal RCRA would allow neutralization if:

It sounds like your dilute and used nitric/HF solution is a "spent waste" (used in some process or generated in the lab).  So you have a D002 not a U listed waste.  In addition this solution would not be considered oxidizing at this concentration.  The EPA defers to the DOT to define oxidizers.  Nitric acid mixtures must be greater than 50% concentration to be considered oxidizing (UN1796). 

I cannot comment on your state or wastewater permit rules but this is likely allowable under the RCRA treatment exemption.

Here is the neutralization rule reference: 40 CFR 270.2(c)(2)(v)

And the D001 regulatory reference: 

 Title: Section 261.21 - Characteristic of ignitability.