Originally Posted by
shepard808
Dr. Bill,
Thank you for your response. Other relevant data on lab test (as far as I can tell)
Testing lab: Norchem drug testing lab in flagstaff arizona
Method used: not listed on report. indicates test performed under CAP-FUDT certificate
A state probation officer testing is calling this a positive based on lab report. Footnote on report indicates that ETG negative and ETS positive are consistent with alcohol consumption.
There is no indication of any normalized or modification of the ETS level (120) for urine concentration. How can I find a commonly accepted formula for this? Is this standard practice for labs to normalize based on creatine level?
Thank you for the link to Dr. Skipper's site.
Skippers site contains the formula (
click on the highlighted blue section at top) and most labs do not normalize despite universal research recommendations to do so.
The statement that an isolated EtS reading of 120 ng is consistent with alcohol consumption is absurd, a distortion and misapplication of what little scientific evidence exists.
In fact, "low level positives (under 2,500ng/ml) can occur
more often* from incidental exposure" See
Skipper
I am deferring to Dr. Skipper because he introduced this test to the US, was then and continues to be, the primary proponent of it's use. Furthermore, he is
the recognized authority in relation to the test and information from his office greatly influences it's use, per advisory(ies).
My information, is anonymous and while I am, in fact, an expert in this field you
must place reliance on recognized, verifiable and scientifically acknowledged resources. So please take the time to read Dr. Skipper's information. I also recommend contacting him via the e-mail address provided on the website.
If you take the time to read his website, Dr. Skipper makes the best argument for negating the validity of this test. Specifically, at values far in excess of your reading, even when both metabolites are present, he unequivocally states "EtG/EtS not Proof of Drinking"
I would advise you to protest this finding, in writing, with a copy to the laboratory; a copy to College of American Pathologists (CAP); Substance Abuse & Mental Health Services Administration (SAMHSA). I have previously provided a complaint process for false positives
See Lab Complaints, post #10.
Even though this test result is
self-negating you should offer, insist upon, taking another form of confirmatory testing, PEth preferred, but any combination of blood assay many of which offer a longer detection period.
Please understand that you are at an extreme disadvantage. You must be very aggressive in your protest. You must force their hand.
I am not throwing you away or discouraging further contact. I will be happy and anxious to answer any questions that emerge, Dr. Skipper or otherwise (certainly we disagree on many points). Now it is incumbent on you to cut through all of the circumlocution so common to this test. All of the
factual data is in your favor.
*emphasis added