I seems to me the sound at the end is /tl/ or as far as I and most people I know pronounce it. This applies for most other -tal ending words. I know it could be /təl/ but the vowel is not present at all in my pronunciation.
This leads me to ask, is it therefore correct to say environmental is 4 syllables by the definition that a syllable is based on there being a vowel sound for it to be a syllable?
Or do we relax the syllable definition to include the /tl/ sound even though there is no vowel sound present?