Hey Hersh...welcome to da pond show, man.
Otto is the Dirt King around these parts. Listen to him and heed his advice.
The only other thing I might bring to the table is
this link to the USDA Publication #590 for pond construction. The details of the specific construction spec's that you seek begin on page 56. The entire publication is an excellent basis of information, but very little can beat the experience of guys like Otto and ground truth. To get both of these facets combined, seriously consider picking up a copy of the latest/greatest compilation of literary expertise in pond construction;
Perfect Pond...Want One?
