Brettski, thank you for the great article.
Okay, so here is my plan:
1. Already drained pond
2. Dig 2' on all sides of 8" pipe. I will use judgement under the pipe and if I hit solid ground or clay, I won't dig past that point.
3. Then I will build concrete form of about 4'x4'x1' and fill with concrete.
4. After 7 days cure time, I will remove forms and I will also add a PVC collar 4'x4'x1/4" about 1' away from concrete collar.
5. I will apply mastic (foundation coating) all around the PVC and concrete collars.
6. Then I will begin compacting (6" at a time) around both collars with rented "jumping jack" compactor.
7. I will manually compact the 1' void between the collars but only to about 6" depth.
8. As I compact around the collars, I will add pure bentonite to the 1' void between the PVC collar and concrete collar.
Your critiques are most welcomed since I don't start the digging for 5 days.
