Visibility in Mandatory Federal Class I Areas, 1994-1998
A Report to Congress

• Cover Page (PDF)(2 pp, 181 K)
• Table of Contents (PDF)(16 pp, 85 K)
• Front Pages (Abbreviations, Acronyms, Glossary of Terms) (PDF)(3 pp, 120 K)
• Executive Summary (PDF)(6 pp, 259 K)
• Chapter 1 - Introduction to Visibility Issues (PDF)(10 pp, 364 K)
• Chapter 2 - Visibility in Individual Mandatory Federal Class I Areas (PDF)(171 pp, 4 MB)
• Chapter 3 - National and Regional Discussions of Visibility (PDF)(32 pp, 1 MB)
• Chapter 4 - References (PDF)(2 pp, 78 K)
• Appendix A - List of 156 Mandatory Federal Class I Areas Where Visibility is an Important Value (PDF)(5 pp, 71 K)
• Appendix B - Explanation of Method for Creating Summary Data from Raw IMPROVE Data (PDF)(2 pp, 63 K)
• Appendix C - Methodology for Calculating Light Extinction from Monitored Aerosol Mass Data (PDF)(5 pp, 216 K)
• Appendix D - Theil Method to Determine Statistically Significant Trends (PDF)(1 pg, 88 K)
• Technical Report Data (PDF)(1 pg, 5 K)