The phrase is intended to represent aspects that already have, or have the potential to have, significant impact(s) on the environment (a.k.a. the surroundings in which the organization operates, which may extend beyond the organization). It should not be misconstrued as ?we don?t have to have significant aspects because we control everything good?.
That would make 4.3.1 an escape clause to all organizations, and render it useless. The paragraph is in there for a reason ? to require that the organization determines those aspects/impacts which are ?significant? to them. Even the most environmentally-responsible companies have established viable methods of determining what is significant to them.
Read up on the guidance section A.3.1 in ISO 14001 and (if you have it) section 4.3.1 of ISO 14004, and you?ll know what I?m talking about.
To be more precise, significance criteria can be applied to either environmental aspects or their associated impacts, but in most cases it is applied to impacts. If an aspect has (or is going to have) a significant impact, then that aspect becomes ?significant? by proxy. It is a cause-effect relationship. If the impact is the ?effect?, then the aspect is the reason for that effect. If that aspect is deemed significant enough to me, I will most certainly take it into consideration. I may not have to take action on it, but at least I?ll know how significant it is because I established criteria to classify or rank it.
That?s a rather myopic view if one is attempting to maintain a ?well-controlled? EMS. What about products and services, not to mention normal and abnormal operating conditions, start-up and shut-down conditions, and reasonably foreseeable emergency situations? What about legal and other requirements, or new/changed objectives? That considerably widens the field for aspect/impact hunting purposes.
And yes, the organization must know which of their identified aspects/impacts are more significant in relation to others. That is what enables them to prioritize their efforts - plain and simple.
But if they don?t have a process to continually search for and identify aspects/impacts, then ? like Andy said ? they?ll be ?falling asleep at the wheel?. Time itself happens to be a very crucial factor that can change many elements of an organization, and ? like a volcanic eruption ? can quickly change the landscape if they are not mindful of the consequences. Ergo, that organization must determine appropriate levels of significance of the elements it identifies as being important to the EMS ? there?s no two ways about it. The ANAB document that I linked in
post #6 is straight from the horse's mouth.
Brian