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To: walz@el*.ep*.ch*
To: techdiver@opal.com
Subject: Re: Cleaning tanks with 409
From: <JOHNCREA@de*.co*>
Date: Wed, 06 Jul 1994 11:54:50 -0400 (EDT)

Mike,

The only problem with blowing air into tanks after cleaning is that
you MUST use oxygen clean air for this, or you can re-contaminate
the tank that you just cleaned.

Using dry nitrogen is another way to slow or prevent the rusting.

John

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