How dark does the line need to be on the test cup device to be negative?
The control line and the test line may be very light, however when both lines are present, no matter how light they appear to be, both lines present confirm a negative test result. If either line is missing, a confirmation test should be performed. If you cannot interpret the test result, then forward it to the lab for full confirmation testing. Do not interpret test results after the first 8 minutes of inserting the test device into the urine. The only valid result is the result that appears within the first 8 minutes. Do not leave the test device or employee unattended while waiting for the result. If you miss the opportunity to record the initial screening result within the first 8 minutes, do not retest the employee. Simply forward the test as inconclusive to the lab for confirmation.
