Like Theo says, you need some good clay to pack over the leak, and you really want 2' of clay.
If you had the clay on-site, a total SWAG would be $5K give or take, but please realize I have no authority to guess on pricing.
Excerpt from Robert Crais' "The Monkey's Raincoat:" "She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."
