ENGLISH TRANSLATION of Reference Letter – Slovenian Water Authority

Supplier: EKO GEA., Nejc Dordic, s.p. 18.09.2008

Ul. M. Grevenbroich 13

3000 CELJE

Company Registration Number: 3102297000

Tax ID Number: S183131833

Supplier Agent and Signatory of the contract: Nejc Dordic

Per your request for a report on microbiological waste water treatment using EKO GEA’s product, the

undersigned validates the following:

PRODUCT VALIDATION REFERENCE

We certify that that our plant in Kasaze utilized the above service in 2008 to implement our programme

for microbiological treatment of waste water. We confirm that the services provided have been

professional, high quality and in accordance with Dolič contract.

The company EKO GEA, Nejc Ðorđic, delivered the biological algae preparation to the WWTP Kasaze

monthly.

The dosing procedure (Koločino post dosing and pre-treatment) were determined based on professional

assessment of our processes, with full knowledge of wastewater treatment technology and appropriate

application of the EKO GEA preparation.

Operation of the treatment plant was extremely improved by using the preparation. Improvements

include: Increased cleaning effect, reduced sludge quantity by approx. 40%, reduced odour from open

lagoons, reduced growth of filamentous algae, and reduced suspended solids.

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Due to use of the algae preparation, overall operating costs were reduced at Kasaze plant mainly due to

reduced waste sludge quantities, but also, the reduction in lagoon odour prevented the need for

additional treatments and the associated costs.

Place and date:

CLIENT: Public Utility Company Žalec (http://www.jkp-zalec.si/index.html )

Signed: (on original document)

Director: Matjaz Zakonjsek , Engineer

Stamp: (on original document)