1) Our standard spec is <10,000 cfu/g.
2) We are typically under 1,000 cfu/g.
My question comes from my personal agreement with the previous commenters: from the customer's perspective, our worst case is the most useful/important information, though our current COA format doesn't allow for the reporting of multiple results per lot. My direction is to report the average, and to consider values that are below the testing limit (<100) to be zero in calculating that average. I had hoped to find some sort of information regarding the common practice, but haven't really been successful thus far.
IMEX the sample size is usually built in to the seller/buyer's contractual agreement. i assume the spec you quote is mutually agreed.
It might relate to the product but If all the APC results are <1000cfu/g it likely not matters much to yr customer how you present them ?.
Results for other micro. parameters might have a/more significance.
Personally i refrain from donating excess information unless it's agreed on so i would probably calculate an average including the 100's since they presumably don't make much difference to the answer anyway ?, eg 900,0,0 and 900,100,100 = pretty much the same average allowing for micro. accuracy.
PS - <100cfu/g presumably means no colonies on 10(-2) plates ?. Maybe should do 10(-1) plates as well unless not practical.