Related Information Steam Electric Power Generating Effluent Guidelines You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more. Final Rule (PDF)(15 pp, 2 MB, September 17, 1980, 45 FR 61617) Clarification of BPT variance clause Final Rule (PDF)(3 pp, 444 K, September 29, 1978, 43 FR 44846) Amendment to BPT variance clause