CSS - Can't figure where excess horizontal scrolling is coming from?

CSS - Can't figure where excess horizontal scrolling is coming from?

References

Reference NO 1

http://stackoverflow.com/questions/15192326/css-cant-figure-where-excess-horizontal-scrolling-is-coming-from

Reference NO 2

http://stackoverflow.com/questions/14015878/extra-space-and-horizontal-scrollbar

Reference NO 3

https://drupal.org/node/321181

Reference NO 4

http://reference.sitepoint.com/css/floatclear

Reference NO 5

http://css-tricks.com/full-browser-width-bars/

Reference NO 6

http://www.webmasterworld.com/css/4317938.htm

Reference NO 7

#EANF#

Reference NO 8

#EANF#