I am not aware of any EPA requirements that would prevent gold over 
silver over copper, but I think that there may be migration problems.  

On Mon, 14 Apr 1997, Fidelity Technologies Corp. wrote:

> 
> --- On Mon, 14 Apr 97 12:57:41 PDT  "Fidelity Technologies Corp." <[log in to unmask]> wrote:
> HELP!
> I have a requirement on a PWB for Gold over Silver plating over copper clad glass epoxy board.  
> Several mfg have told me No due to migration problems and EPA requirements.  Would someone 
> provide provide additional information on this.  I would like to show customer why and propose 
> gold over nickel.  Many thanks.
> -------------------------------------
> Name: FIDELITY TECHNOLOGIES CORPORATIO
> E-mail: [log in to unmask]
> Date: 4/14/97
> Time: 12:57:41 PM
> 
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> -------------------------------------
> Name: FIDELITY TECHNOLOGIES CORPORATIO
> E-mail: [log in to unmask]
> Date: 4/14/97
> Time: 1:07:39 PM
> 
> This message was sent by Chameleon 
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