Man.... sorry to hear about the oil line break. That sucks! When I was trenching, ripping something up my biggest concern. I had water,electric main, cable tv, phone and gutter down spout drains to cross. I made it through almost clean. I caught the sch. 40 down spout drain, an ripped a nice hole in it. Not nearly as big a head-ache as what you encountered, but I still had to dig back and replace a 4' section. Hope you didn't lose much of that precious oil. In the not to distant future, oil won't be much of a concern.