My name is Rob and I am the senior superintendent for an electrical company in Los Angeles. I have a job site that is nothing but dirty work. We are installing a fiber optic net work in a university. The dirty part is all the 4" conduit is being buried 36" under ground. To add a little challenge, it is averaging 100 degrees every day. One of my guys had suggested that I contact you and see if you would be interested in wrestling 4" conduit into a 36" trench in 100 degree heat for 8 hours! THIS IS A DIRTY JOB! Time is of the essence, we are through 80% of the job scope so we only have a couple of weeks left. I hope to hear from you. PS any questions on how dirty this, I can send some pictures.