Congrats on your first brew dk
I'll just check your file for you here as you are getting well-sorted on the yeast. One thing though, try to use dried yeasts when starting out when you can. They are just as good as liquid yeasts but cheaper and easier to use. For the 'Krispy Kolsch', with no to little fruitiness, I use German Ale Safale K-97 dried yeast and do my fermentation as written at the bottom of
this post. Lol! I just saw that that post was written to you
.
Anyway, definitely wait the 36 hours (even 48 hours)before you start worrying about the yeast. If you do end up pitching dry yeast, on this recipe, I would try to buy K-97 as first choice, US-05 second (ferment at 15-16C) and Nottingham last (keep it cool so as you don't blow up. That stuff is dynamite).
.......
Let's have a look at your file but before I do, be aware that you can't tell much, if anything, from numbers from a single brew day. You need to keep recording for a while to make sure that no consistent dodgy pattern appears
.
Firstly, your mash volume question. That's nothing important. It's just the volume in your kettle once you have put all the strike water and crushed grain into your kettle. In other words, the volume after you have doughed in. Main reason we have it there is so that the BIABacus estimates can be checked over time.
Nice job on filling the BIABacus out. Good stuff
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In section V, no need for the "-" sign. That will actually give you a wrong answer.
Your evaporation is lower than estimated. It's not out of the range of what is normal and I have no problem with you over-riding that in Section X of your next brew as lowering the evaporation rate really has no downside but!!!!...
Were you doing a good rolling boil and did you have the kettle lid off? (Sometimes these things get missed.)
On a first brew, once I have looked at evaporation, I have a bit of a glance around making sure that the numbers are what I call, 'honest'. In other words, there should be discrepancies between the actuals and the estimates. Yours are honest so good job.
I then go to Section P and just see if that section has any agreement. That's an advanced thing and I won't go into it here. That section though does confirm for me that the main culprit in this brew is the low evaporation rate. This has caused you to get more wort than expected and therefore a lower OG than expected.
More info on boil vigour, lid and atmospheric conditions would certainly be interesting.
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Finally, as Dee and chiller have said above, nothing to worry about here. That beer will be great. Only time you really get a dodgy all-grain beer is really through an infection or storage fault.
Congrats again
,
PP
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. Correct Hop Addition was supposed to be 38.6g of 5.3%AA Hallertau Pellets instead I added 38.6 g of 4.1%AA Halletau Pellets. Lesson Learned check the back of the Hops package before buying 
. Lesson Learned: don't multi-task during boil 
