Update: I did some research. Well I know that they have strict regulations they have to follow as they adhere to the United States DoT.gov standards, so I actually took the time to read through it. It said that they may only rule an diluted/synthetic sample through lab test results of creatanine, pH, and gravity. I also cross referenced LabCorp's official website and the categories it tested in regards for validity testing are : Creatinine, Nitrates, pH, and Gravity. Although I did not find any evidence of the collector's ability to effect results in any way such as leaving comments and such? I am still tripping out. I read through the whole process I feel the only thing he could have done under suspicion would be to void my sample and make me retake it on the spot. What do you think will happen?

Sources:
Drug & Alcohol Policy & Compliance | U.S. Department of Transportation