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.