Nadari Tannery (respondent 63), M/s. Jajmau Tanners (respondent 65), M/s. International Tanning Industry (respondent 66), M/s. Poorwanchal Tanning Industry (respondent 70), M/s. Navratan Tanning (respondent 71), M/s. Haroou Tannery (respondent 73), M/s. Himalaya Tanners (respondent 76), M/s. R.A. Traders (respondent 79, M/s. Alam Tannery (respondent 83), M/s. G.T. Tannery (respondent 84), and M/s. Awadh Tannery (respondent 86) to stop the running of their tanneries and also not to let out trade effluents from their tanneries either directly or indirectly into the river Ganga without subjecting the trade effluents to a pretreatment process by setting up primary treatment plants as approved by the State Board (respondent 8) with effect from 1. l0.1987.