- Interim Final Rule (Initial BPT requirements) (PDF)(9 pp, 1 MB, October 17, 1975, 40 FR 48830)
-
Development Document for the Coal Mining Category (PDF)(261 pp, 7 MB,
October 1975,
440/1-75/057)
Industry description, wastewater characterization, treatment technologies, regulatory compliance cost estimates and pollutant loadings for the final rule