My city (Washington, DC) now requires all construction sites that are disturbing the earth to have sedimentation tanks, so that if an excavation needs to be pumped out the sediment can be removed from the water. I support this — we need to keep runoff out of our sewers and waterways — but it’s a pain. I priced a tank at $2000. It’s about eight feet long and needs two people to move it, it takes up space on the jobsite, and is a pain to store and transport.
I passed by a site today that had a homemade tank made of three blue plastic barrels connected with PVC pipe. The pipe was connected with unions so it could be disassembled. I have to assume that this has been inspected and approved by the city. I like this because it will be light and easy to transport, and best of all, cheap — I can get the barrels on Craigslist for $20 each.
I will try to post a picture later, but I’m wondering if anyone has experience with sediment tanks and thoughts about construction.
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