This year, approximately 2, drug tests results will come back from the labs reported as "positive" for one or more drugs. Diluting a Urine Sample: Save Photo. Dilution, Substitution, and Adulteration. Collectors are trained to check the temperature of urine specimens to make sure they are between degrees. Dog urine can be substituted to pass a drug test. Taron Bell — October 16, Does the initial reading stay the same on temperature strip or does go aways after 4min. A greater percentage of those this year than last year will be from cheaters who tried to "pass" and were not successful. Leave a Comment Cancel Reply Your email address will not be published. A note to readers: Unintentional dilution is fairly common. They are intended for single use. Creatinine is one of the tested parameters when identifying diluted urine. When a test applicant consumes excessive amounts of fluid, the concentration of urine will subsequently become dilute. Unusually, I was kept waiting for hours and dozed off.