Brad, there are a ton of folks on this forum that can help but I suggest providing a few more details, such as:

Is this an excavated or embankment pond?

How deep will you be excavating in either case?

Did the soil tests provide a "% passing No 200 sieve"?

Were these samples taken from borings or excavated test holes, and how many sample locations?

What is surface area of pond?

You may have enough clay to manipulate and cap/core over/around any problem areas, without the cost of brining bentonite in. Key is to find an experienced and honest contractor and like President Reagan always says, trust but verify. I have what I believe is a pretty air tight pond contract both from technical and commercial perspective, and am happy to share it if you'd like to look at it. I just built a 5 acre pond in pretty volatile soils but had enough clay to really make a great impermeable liner and dam core trench, etc and its held like a jug for several months now. Message me your email if you'd like to take a look at the contract.