I'm a general contractor seeking bids for a small soakage trench to be installed to capture two downspouts and a trench drain coming from a new detached garage. The soakage trench will need to be 10' from back of workshop minimum, and 5' minimum from property line. I would prefer to use an Infiltrator (manufactured plastic chamber that Lake Oswego allows) because you can simply dig your hole, set the device, and then attach your ABS which obviously decreases costs for both of us.