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Read the archived revision information

TIA 12-1 (issued: 8/11/2011) (PDF, 23.8 KB)

Errata 820-12-1 (issued: 1/3/2012) (PDF, 33.0 KB)
Errata 820-12-2 (issued: 3/8/2012) (PDF, 18.3 KB)
Worker Casualties involving Wastewater, Sewers or Sewage Treatment Plants and Fire Incidents at Water or Sanitation Utilities (PDF, 107.8 KB)