TCP_REFRESH_HIT

["bergenpeak@xxxxxxxxxxx" <bergenpeak@xxxxxxxxxxx>]

Is there a way to look at the object cache in squid and determine the 
current "freshness" of the content? 

I've got content in the squid cache where I would expect the content to 
be a "TCP_HIT".  Looking in the squid access.log, I see the access to 
the object being reported as "TCP_REFRESH_HIT".  I'm trying to 
understand if it's something in the client request or something in how 
the original object was served up by the origin server which is causing 
squid to re-verify with the origin server that the object hasn't changed.

Thanks