Took 1 hit of weed using pipe before 11 days. Will I pass drug test at Labcorp?

Hi !

I am 24. Weight: 155 LB and Height: 6 FT. I am skinny.
I smoke rarely. First time I smoked weed couple of times in March 2010. I smoked weed couple of times in April and I was clean for May, June and mid July.
I took one hit of weed using pipe before 11 days (April 28, 2010). I have drug test at Labcorp on August 9. I took 4 first check home drug tests (50 ng/mL) for weed and I passed all of them with good visible Test line. All the home drug test test lines were visible in a minute.

My question is Will I pass drug test at Labcorp ?

Please I need some feedback. I will really appreciate.

Should be fine. The levels will be to low to hit positive.

Thank you ! I appreciate your reply. That will give me some ease. I took 4 home drug tests and passed all. So, hopping for the best ! I am not diluting urine with water or anything else. I am drinking water as I drink normally. So, it should be fine. right ?