Siteimprove Single Page Check can be used to validate individual pages at anytime to ensure they are error free.

• Under Accessibility in Siteimprove, click on Single Page Check under Accessibility Overview
  
  
   

   
• ​Copy the URL of the page you want to check (For example: About SAC)
  
• Enter the page URL to the URL field, and click Check Page
  
   
  
  
• The URL is added. Wait until the arrows stop spinning
  
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• Click on the link to open the page report
  
  
  
• Select Quality Assurance tab to open report
  
  
  
  
  
• Select Accessibility tab to open report
  Click the dark pink boxes to show type A issues. Two critical issues with "Image with no alt attribute" were found . Those two images are included to the Ad Rotator Web Part (View instruction on adding image alternative text.)