How do I stop root-servers queries

[DonDavisFCB]

I am running an internal only name server (BIND9.2).
My firewall folks have advised me that I am generating a lot of unncessary traffic that they would like to see stopped. I am querying the "root-servers" every 3 seconds.
I do not have them listed in root.hints. I have read that they are "compiled in". How do I stop these queries?
Example of firewall log:
"h.root-servers.net" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.112.36.4" "udp" "73" "" "32907" "" "" "" "" "" ""
"a.root-servers.net" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.203.230.10" "udp" "73" "" "32907" "" "" "" "" "" ""
"l.root-servers.net" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.228.79.201" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.33.4.12" "udp" "73" "" "32907" "" "" "" "" "" ""
"d.root-servers.net" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.5.5.241" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.36.148.17" "udp" "73" "" "32907" "" "" "" "" "" ""
"192.58.128.30" "udp" "73" "" "32907" "" "" "" "" "" ""
"h.root-servers.net" "udp" "73" "" "32907" "" "" "" "" "" ""