Does the term "sudden" in the terms of an insurance policy apply?

11 Greenville County v. Insurance Res. Fund (S.C.App.1993) 427 S.E.2d 913, 917 ["the word 'sudden' was included in the policy to cover an event not yet defined by the policy, i.e. a release which was abrupt or precipitant. We find further support for this interpretation by the realization that if we were to otherwise define the word 'sudden,' the language of the occurrence provision, the pollution exclusion clause and its exception becomes unduly repetitious."].