ðɪ ɪɡnˈɪʃən spɹˈɛd bᵻtwˌiːn tˈæŋks θɹuː ɐ kˈɑːmən vˈɛnt sˈɪstəm, nˈaɪtɹədʒən blˈæŋkɪɾɪŋ hɐdbɪn kənsˈɪdɚd ʌnnˈɛsᵻsɚɹi wɛn ðə tˈæŋks wɜː dɪzˈaɪnd, ænd ðə kˈɑːmən vˈɛnt sˈɪstəm wʌz ɪnstˈɔːld æz ɐ lˈeɪɾɚ mˌɑːdɪfɪkˈeɪʃən tʊ ɐlˈaʊ ɹᵻkˈʌvɚɹi ʌv fjˈuːmz fɔːɹ ɛnvˌaɪɹənmˈɛntəl pˈɜːpəsᵻz.
The ignition spread between tanks through a common vent system, nitrogen blanketing had been considered unnecessary when the tanks were designed, and the common vent system was installed as a later modification to allow recovery of fumes for environmental purposes.