A petrochemicals firm was instructed by the Central Pollution Control Board (CPCB) to shut down one of its plants in Manali on Tuesday. The company Manali Petrochemical was served a notice on December 17 for abnormal levels in the treated effluent water discharged by the plant. he plant had not removed waste water from the old damaged lagoon and had not even provided proper storage area for solid waste. The plant can resume operations only if compliance is achieved.