LIST OF REFERENCES |
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| Period | Position | Contact name | Position at that time | Current company | Current position | Position with respect to mine at this time in the organisation |
| 1993.09.08 1997.06.30 | Maintenance and Utilities Plant Manager | Venancio Díaz-Guardamino | Managing Director | Adviser of Minersa group (owner of Derivados del Fluor). Retired. | Supervisor | |
| Julio de Solaun | Technical Director | Adviser of Minersa group (owner of Derivados del Fluor). Retired. | Supervisor | |||
| Oscar Pérez | Plant Manager-Special Fluorides | Derivados del Flúor, S.A. | Quality Director | Same level | ||
| Julián Muñecas | Mechanical Maintenance Foreman | Retired | Supervised | |||
| Benito Sanz | Utilities Plant Foreman | Retired | Supervised | |||