There's also more at the link, but here's some of the relevant information if you're looking to remove from this site:
rule34.xxx/index.php?pa...

Which r34? I don't know about paheal, but- there's a contact form here on the other site. A friend of mine went through the headache of removing some of her art. They tried to give her a shpeal about free exposure. It should get taken down if you're persistent though.