Sec, if you check this post, i wanted to let you know i just did another home test w/o doing anything out of the ordinary and PASSED! the line is super light. do you think this would help me in any way for the 20ng cutoff? The Healthcare Professional Profile (HPP) tests for a variety of prescribed drugs that currently pass undetected in conventional testing profiles of street drugs, such as marijuana, cocaine and amphetamines. The initial screening of the comprehensive Healthcare Professional Profile (HPP-I; see full list of components) is performed using immunoassay technology (specifically EIA and ELISA) for all analytes. This technology affords rapid turnaround times. Screening for any additional drugs not included in the comprehensive Healthcare Professional Profile (HPP-I) will be performed using gas chromatography/mass spectrometry (GC/MS) technology. the marijuana cutoff for this test is 20ng. is it possible to dilute for such a low number? can i sub for this test even though it's an enzyme test. the test also has a "test sure" adulterant panel. maybe i should just tell them i found another job and thank them for their time. i do not want to be on record with them as having failed a drug test.