RE: Deice trucks

["Bill Strand" <strand@pacsim.com>]

Hello Ry,

"Fir squeezings" isn't quite accurate. Both Washington and Idaho states use
corrosion inhibited calcium chloride. Calcium chloride is a byproduct of the
chemical recovery process of pulp mills and can be used "as is" for road
de-icing in place of rock salt, but I don't believe it meets the Washington
and Idaho Dept of Transportation requirements. As a result, it is normally
treated prior to use to reduce its corrosiveness (to about 90% less than
rock salt). A mill like Potlatch supplies only a small amount of the CaCl2
required by the State. Overall, it is a lot less destructive than rock salt.
In addition, you require only half as much CaCl2 compared to NaCl for the
same amount de-iceing

I don't know what they add to the CaCl2 to reduce corrosion. According to
the literature, it is a relatively save agent that can be found in a number
of common household products.

Hope this helps.

Bill Strand


-----Original Message-----
From:	Cliff Todd [mailto:forester@moscow.com]
Sent:	Friday, November 24, 2000 7:10 PM
To:	Ry Jones; vision2020@moscow.com
Subject:	Re: Deice trucks

Fir squeezings. I've been told it comes from Potlatch's paper mill. A value
added product developed from their waste stream.
Cliff
----- Original Message -----
From: Ry Jones <rjones@airgap.net>
To: <vision2020@moscow.com>
Sent: Friday, November 24, 2000 2:40 PM
Subject: Deice trucks


> Hola,
> I was trapped behind a deice truck today on 95 and I was wondering if
> anyone knows what it is that the deice trucks spray on the roads?
>
> It would seem to all end up in run off, that's why I'm asking.
> Thanks,
> Ry
>