A while back an installer we have worked with sent soil pictures to interpret with the comments that when he dug up an existing failing system “the best I could dig was about 8.5 feet deep in about 4 different spots. Soil was tight and when it broke out it was almost like rock, and hitting it with a hammer and it would break easily.”His description would fit perfectly with describing soil layers massive in structure; very dense and compact in nature and very slowly permeable. Given his location, this describes natural soil layers and not soil that has been moved,
