Okun okun waya irin PVC le pin si ipele ile-iṣẹ (pataki gbigbe omi ile-iṣẹ, epo, erupẹ idoti, awọn ohun elo aise kemikali, bbl) ati ite ounjẹ (oje gbigbe ile-iṣẹ ounjẹ, wara, omi to jẹun, gbigbe winery) oti, ọti ati bẹbẹ lọ. , Agbara afẹfẹ afẹfẹ, fifa ati fifa omi, awọn ọja epo, awọn kemikali kekere-kekere ati omi miiran ati awọn patikulu ti o lagbara ati awọn ohun elo powdery.