The fuel oil company acted a bit responsibly while still trying to make it appear that it was my fault. They got the mess cleabned up and then we went and dumped the coffe grounds all over. Its not any big deal, the coffee acts sort of like a granular activated carbon shield, and besides it emits a really nice coffe odor. WE kept the coffee down for about a week and the smelol was all gone. This has been a year ago next week and Ive almost forgotten about it.
Since then, however, weve changed over to a high efficiency gas (propane) ystem with a tankless water heater. Our fuel bills have plummeted for this old barn of a house.