Use Include
.
Arquivo 1: qa1.conf
<Location /qa1/>
ProxyPass http://localhost:8800/qa1/
ProxyPassReverse http://localhost:8800/qa1/
ProxyPassReverseCookiePath / /qa1/
</Location>
Arquivo 2: qa2.conf
<Location /qa2/>
ProxyPass http://localhost:8801/qa2/
ProxyPassReverse http://localhost:8801/qa2/
ProxyPassReverseCookiePath / /qa2/
</Location>
Arquivo 3: vhost.conf
<VirtualHost *:80>
Include qa1.conf
Include qa2.conf
</VirtualHost>