[Blueface]

Hugh,
If you only smoke cigars and are not an inhaler, you should be fine based on my personal experience.
I did this test immediately following three days of non stop smoking at a herf and my level came back as non smoker.
My wife, who doesn't touch a cigar and rarely sits with me as I smoke came up with almost same level as me (granted, she too was at the herf but didn't smoke).
My son, an occasional cigar smoker at the time came in around the same as mine.
I wanted to have myself considered a smoker and they refused to do so based on results.