Based on boiling 8.00 gallonsliters at 1.038 for 60 minutes, this will decrease your wort by 2.00 gallonsliters, bringing your after boil OG to 1.048. You wanted an OG of 1.051. It looks like it will be under.
This is a nice lager. Split the 15 minute hop addition to half an ounce at 15 min and half an ounce at flame out.