根据REACH的第7(2)条，在将高度关注物质(SVHC)列入计算吨位的候选名单之前，我是否必须考虑生产/进口的吨位?
就已连续生产/进口最少三年的物品而言，申报的吨位必须与该物品在这整整三年生产/进口的物品内所含物质的平均吨位相对应。如果产品中的物质只生产或进口了整整两年，则必须通报这两年的平均值。但是如果物品中的物质仅在上一个历年以后生产或进口，则吨位将仅以上一个历年为基础计算，而不会进行平均计算。
例如，在2010年12月1日之前列入候选清单的物质必须由该物品的生产商或进口商在2011年6月1日之前通知。生产商或进口商应提供前3或2年的平均吨位，或2010年的吨位，这取决于他们连续多少年进口或生产该物品。
因此，在为在某一物品中通知某一物质而进行的吨位计算中，有时会考虑将该物质列入候选清单之前的总吨位。
如该物品于本年开始生产/进口，一经超过1公吨的限额，应立即通知有关人士。在这种情况下，请说明全年的预期吨位范围。

Do I have to consider the tonnage produced/imported before the Substance of Very High Concern (SVHC) was put on the Candidate List for the calculation of the tonnage in accordance with Article 7 (2) of REACH?  
 For articles which have been produced/imported for at least three consecutive years, the tonnage to be reported must correspond to the average tonnage of the substance in the article produced/imported during these three full years. If the substance in the article has only been produced or imported for two full years, the average of these two full years must be notified.However, if the substance in the article has been produced or imported only since the previous calendar year, the tonnage will be calculated based on the previous calendar year only and no averaging will be made.
For instance, substances that had been placed on the Candidate List before 1 December 2010 must have been notified by the producer or importer of the article by 1 June 2011. The producer or importer should have provided the average tonnage of the three or two preceding years, or the tonnage of 2010, depending on for how many consecutive years they had imported or produced the article. 
Thus, there are situations, where volumes of the substance predating the inclusion in the candidate list are considered in the tonnage calculation for the notification of a substance in an article.
Where production/import of the article starts in the current year, you are advised to notify as soon as the 1 tonne threshold is exceeded. In that case please indicate an expected tonnage range for the whole year.

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