15:10 I think is a good spot to pot turn and river. Almost everybody will be cbetting QJxx combo's here with the double gutter so I think he has no straights in his range on the turn. Also the only hands he can really bluff catch river with are KKJx/KKQx or AKJx/AKQx but the majority of his AKJx/AKQx will be cbetting flop so I believe you will get river folds at a very high frequency.

Also, maybe you get the added benefit of folding out some on his A76x type hands on the turn that opted for a flop check back.