english translation

(Translated from original letter)

INDUSTRIAS DEL CUARZO, S.A.     E40331 CARRASCAL DEL RIO – Segovia – (Spain)

Carrascal del Rio, 17th January 2001

Dear Sir,

In reply to your request we express our satisfaction with the benefits obtained from the use of the "rb bertomeu" beco F2/A  additive, which you supply to our industrial facilities at Carrascal del Rio (Segovia).

The fuel oil additive is used in the burners of a dryer trommel for minerals (Potash feldspar).

With the use of the additive beco F2/A in the fuel oil, we have verified the important improvements on the parameters prior to the utilisation of the additive:

·      Removal of unburned particles which previously dirtied dry minerals during the process of drying, which affected their quality.

·      Reduction of the fuel oil consumption, estimated at 3% approximately.

·      Removal of carbon build up in the burners with reduction of the maintenance and greater operational continuity.

·      Reduction of fuel oil sludge with respect to the volume that was previously generated.

·      Less cleaning of the fuel oil circuits and filters.

·      Absence of black smoke due to incorrect combustion and reduction of CO, which means a reduction of environmental pollution.

We authorise the use of this letter for reference purposes.