Without the PDF to view only general observations are possible.
If you used Acrobat to programmatically add tags you still have to work out of the structure tree to determine if the applied were appropriate.
You'd have to manual check page content to determine what remained for manual application of tags or designation as an artifact.
~~~~~~~
For those who need to or desire to provide accessible PDF the pending release of the following documents will be "must have" references.
--| The ISO Standard for PDF/UA (ISO 14289-1:2008)
Purchase at: http://webstore.ansi.org/RecordDetail.aspx?sku=BS+ISO+14289-1%3a2012
--| PDF/UA-1 Technical Implementation Guide
--| PDF/UA-1 Technical Implementation Guide: 32000-1
(ISO 32000-1 is the current ISO Standard for PDF)
--| Achieving WCAG 2.0 with PDF/UA
(WCAG 2.0 for PDF is PDF/UA)
The latter three documents are expected to be available on AIIM's web site.
http://www.aiim.org/Research-and-Publications/standards/committees/PDF UA/App-Notes
Be well...
