During the late evening hours of 2 December 1984, water was believed to have entered a side pipe and into Tank E610 whilst trying to unclog it, which contained 42 tons of MIC that had been there since late October.
Selama jam-jam sore 2 Desember 1984, air diyakini telah masuk ke sebuah pipa samping dan masuk ke Tangki E610 yang mencoba untuk melepas sumbatannya, yang berisi 42 ton MIC yang telah ada sejak akhir Oktober.