1. Standards of Coke Oven Plants in Iron & Steel Industry The emission standards for the coke oven plants in Iron and Steel Industry were notified in October, 1997.

The following are the suggested amendments in the existing standards:

i. A new column of Standards for Rebuilt Batteries would be introduced;

ii. The charging emission for the existing batteries would be 75 seconds per charge in place of the existing norms of 50 seconds per charge;

iii. The limit of 5 gm/ ton of particulate matter (PM) emission during coke pushing (stack emission) would be deleted for existing batteries and would be applicable to rebuilt and new batteries;

iv. The limit of 800 mg/NM3 for sulphur in coke oven gas used for heating and particulate matter emission for quenching operation of 50 gm/m3 of coke produced were also found redundant because of technological deficiencies hence these have also been removed for existing batteries;

v. In guidelines in para (i) the following lines are added “treated effluent conforming to the effluent discharge standards can be used for quenching. Use of untreated process water as quenching water shall not be permissible”.

The emission norms for asbestos fiber were notified in 1989 with a limit of 4 fiber/ cc. These norms are now being revised after taking into account the health impacts and available technologies. Following norms were agreed:

It was also suggested by the members that the unorganized sector should also be brought into the ambit of the norms and chrysotile asbestos may be recommended for restricted list of Export – Import Policy. A suggestion was also made regarding the introduction of either the license or registration policy for the importer of asbestos.

Committee noted that presently, there are no norms for marine disposal and CPCB should immediately undertake studies and surveys for evolving the same. The present case, therefore needs to be treated on an experimental basis for effective collection of data with built-in measures for retrofitting, required if any, in the eventuality of unacceptable pollution load. The Committee, therefore, recommended that GPCB may allow following marine disposal norms for the effluents along with the conditions detailed or monitoring and retrofitting;

PH - 6.5 to 8.5
BOD - 100 mg/I
COD - 500 mg/1

1) Treated effluent from final effluent treatment plant (FETP) passes the continuous bioassay test norms (for marine species) before it is discharged through the marine outfall.
2) Continuous monitoring of treated effluent from FETP for pH, BOD, COD and TOC should be carried out.
3) The project authorities shall provide protocol for regular post project monitoring for effluent at FETP and marine outfall location, result should be submitted to CPCB & GPCB regularly.
4) The project authority would abide by the norms evolved in future for such marine disposal.

The following revision in the Standards for Aluminum Industry is recommended by CPCB, based on the recommendation of CREP, which have been agreed by the industry.
(i) Revision of Fluoride Emission Standards

• For Soderberg Technology – 2.8 kg/ ton to be achieved by December 2006
• For pre-baked Technology – 0.8 kg/ ton by December 2006

• Twelve consecutive months average - 40 ppm
• Two consecutive months average - 60 ppm
• One month average - 80 ppm

• Particulate matter limit of 50 mg/Nm3 by December 2005

The CPCB informed that the proposed emission standards for pesticides manufacturing industry have been approved by the Peer & Core Committee meeting held on April 21, 2004. The Crop Care Federation of India representing the pesticides industries had made submission for relaxation in respect of H2S, HBr, CH3CI and dust norms. CPCB has discussed the matter and has finally recommended the following standards which have been adopted/ approved by the Board in its 132nd meeting held on January 04, 2005

Since there was some discrepancy in standards as these were for all kinds of Brick Kilns, it was decided that CPCB may review the proposed revision in the existing standards carefully and put up for consideration of committee in the next meeting. The committee also felt that the siting criteria and proposed good practices may be separately published by CPCB as these are only the guidelines.

The existing standards for sulphuric Acid manufacturing are given below:
SO2: 4.0 kg/MT of Sulphuric Acid Produced (100% conc.)
Acid Mist : 50 mg/NM3
It was observed that the same set of standards are applicable to all sulphuric acid plants irrespective of their size of operation. Further, due to technological advancement, both in process and pollution control technologies, the revision in the standards was felt necessary. After elaborate discussions and a study conducted by CPCB, following standards were proposed;