Economic Impact Of Interim Final Effluent Guidelines Of ...
This industry comprises: SIC Code 1111 - Anthracite (hard coal) Mining and Preparation Plants SIC Code 1211 - Bituminous Coal and Lignite (soft coal) Mining and Preparation Plants The proposed Interim Final Effluent Guidelines would impose a pH lim- itation of 6-9 on point source discharges from existing coal mines and prep- aration plants to ...