So I'm doing a job - it was supposed to be super easy. Part of it is to trench 75 feet and then i kick some PVC into the trench and I'm done with it - super easy until the trencher bounced off solid bedrock at less than a foot and there is no option of getting a rock grinder in there to cut the granite, nor would I want to do such a thing. So annoying, who put the bedrock there!!! So my only option is RMC to go underground to meet the minimum cover requirement without concrete. On top of the bedrock is decomposed granite that is so porous looking that as far as I can tell I may as well be installing the RMC in a swimming pool. Customer asked me how long will the RMC l last in Southern CA desert climate DG if it's wet - it's under a lawn that is also a drainage plane so it's going to be wet? I have no idea how long it will last in this climate and I hate RMC in wet environments because I despise anything that corrodes and at some it will leak and basically the THHN will be underwater in that pipe right? Anyone know how long the RMC will last in wet So CA DG?