Blue cast problem solved

Turns out the heavy blue cast I had in my slides was due to the lab that I was using. I shot several rolls of Provia and had them processed at a different lab and they've all been fine. Same batch of film from B&H, plus one of the rolls was shot at Tahoe where it was around 40 degrees out, so definitely the temperature didn't affect the film that much. Of course, when I underexposed my shots, there was a blue tinge to the snow, but it wasn't that heavy. I tend not to notice slight casts in color, so if it stands out to me that means it's very very glaring. Once I scan in some photos I'll add them for comparison so that you can see exactly what I mean.