REPORTING BASIS
For some parameters, the sampling method and
frequency can also affect accuracy. The quantity of
refrigerant is difficult to establish because it is used
in dynamic systems in which it can occur in both the
liquid and gaseous phases. Refrigerant losses are
determined on the basis of the quantities added to
replenish systems, which is less accurate than direct
measurement of actual losses. At a number of pro
duction units, waste is removed from the site in
containers of a given volume, and inaccuracies can
arise in translating volume to weight. In the absence
of local legislation in some countries outside Europe,
the definition of hazardous waste is not always clear.
In some cases, hazardous waste is safely recycled and
is no longer designated as hazardous.
Comparability
The comparability of the data depends on the extent
to which estimates have been used in determining
the performance indicators. Where estimates have
been used in interpreting trends, it is stated in the
text of this report.
Spreadsheets giving standard calculations for C02,
NOx and SOx have been made available to the pro
duction units to ensure comparability of their report
ed figures.
Since no material changes have been made to
definitions, calculations or estimating procedures,
there is comparability from year to year, except for
the data on safety and waste, as indicated in the text
of this report.
HEINEKEN N.V. S U S TA I N A B I L I T Y REPORT 2002-2003
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