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Appendix D, Sealing of Portals <br /> The design of plugs, part of the portal and openings seals, is presented on page 4-66b of the PAP. <br /> Documentation within the permit attesting to the sealing of portals is summarized in the <br /> following table. <br /> Opening Descri tion of Seal Reference <br /> Portal 1 4-foot thick concrete seal PAP pages 4-i, 4-72; Findings, <br /> penetrated by two 3-inch RN-01, page 4 <br /> valved pipes. Backfilled <br /> Air Return (Portal 1) Concrete plug. A 36-inch PAP pages 4-i, 4-ii, 4-72 <br /> culvert provides access to the <br /> air return. <br /> Portal 3 PAP pages 4-66i, 4-72 <br /> There will be no entrances to the mine from the south (PAP page 4-114). <br /> The mine was sealed in 1986 (PAP page 4-120). <br /> The Findings of RN-02, August 12, 1993, page 7, indicate that surface facilities were removed <br /> and the portals, shafts, exploration holes, and wells were sealed. However, some holes were not. <br /> See Rule 4.07 of the review for a recapitulation of sealed holes and wells. <br />