crobb305 - 3:39 pm on Mar 21, 2011 (gmt 0) [edited by: crobb305 at 3:50 pm (utc) on Mar 21, 2011]
Where is the option in Google Webmaster Account to remove pages from Index and cache?
Search Google for the Google URL Removal Tool.
Do NOT submit pages that you intend to keep on your site because they will be removed from the index for at least 90 days. You cannot delete a page, remove it from the index, resubmit the same URL in a sitemap and expect it to immediately return to ranking --- that would take several months. You can, however, quickly remove dead URLs and deleted content using the removal tool.
There is little risk of removing a page by accident, because they must return a 404, 410, or be blocked in robots.txt. If you are deleting pages permanently, the removal tool is a quick way to delete pages from Google, often within a day or two. I have never seen it have a rapid impact on rankings, however.
[edited by: crobb305 at 3:50 pm (utc) on Mar 21, 2011]