Completeness depends on the availability of activity data. Inventory compilers in countries without domestic solvent production may need to use expert judgement in estimating activity data, because import statistics are likely to be incomplete (see Volume 1, Chapters 2 and 3).

There is a potential for double-counting with Volume 3 Chapter 6 which deals with HFC and PFC use in the electronics industry. This should not occur if care is taken to identify previous ODS consumption patterns. It is always good practice to cross-reference of both parts of a submission by inventory compilers to confirm that no double-counting has occurred.

With respect to double-counting, care should also be taken where HFCs and PFCs acting as solvents are contained in aerosols. A clear policy should be established as to how these are accounted. It is normally good practice to account for these uses under consumption in aerosols to avoid problems in making distinctions between solvents and propellants, particularly where one chemical can act in both roles. This matter is covered further in Section 7.3.

As noted in Section, it is also good practice to carry out some research to confirm that no HFCs or PFCs other than those listed in Table 7.1 are being used for solvent applications. Producers, importers and distributors should be able to confirm the situation.

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