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Toxics Use Reduction Institute · Surface Solutions Laboratory
Toxics Use Reduction Institute

Surface Solutions Laboratory

Trial Report

Trial Number 1

(Client Number 27, Project Number 1)

Trial Purpose: Results of Requested Testing

Date Run: 05/13/96

Experiment Procedure:
We have just finished up a round of tests to determine an alternative cleaning method for removing the dried on slurries from the screens that you supplied to us. The testing that we have performed was divided up into two parts.
The first part of the testing was to find an environmentally friendly chemical that would remove the dried on slurries fromt he screens. Nine different chemicals from three basic categories (terpenes, aqueous, and solvent) were tested.

The second part of the testing used a sodium bicarbonate blasting procedure from AA Envrionmental in Woburn.

Trial Results
Part 1
None of the these chemistries even showed any possibility of being effective so this part of the testing was abandoned.

Part 2
This procedure was very effective.  It took only a few seconds to remove all of the clay from half of a sample screen.  The blasting procedure can
either be hired on a contract basis where AA Environmental will come to your facilitiy and clean the screens, or you can purchase your own blasting
equipment.  Judging from the number of screens you plan to clean in a day, it would probably be more economic to hire AA Environmental on a contract

Success Rating
Results successful using TACT (time, agitation, concentration, and temperature, as well as rinsing and drying) and/or other cleaning chemistries examined.

I have enclose some information on AA Environmental and the Armex Sodium Bicarbonate Blasting unit. I have also enclosed the screen that was cleaned at AA Environmental along with a more detailed description of the testing performed. I will contact you by the end of the week to answer any questions that you may have or to perfom more testing if you desire.