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Accredited Drug Testing provides drug and alcohol testing services at multiple locations throughout your local area.
Customized Testing Options Available l Discounts available for Bulk Purchases l Onsite Drug Testing Services
As the top choice nationwide, urine drug tests serve as the standard, federally accepted method for DOT-mandated screenings, specifically under 49 CFR Part 40. Urine testing highlights recent drug or alcohol consumption by evaluating a sample's drug presence, metabolites, or alcohol markers. Crafted for precision and privacy, it delivers reliable, legally secure outcomes tailored for businesses, legal obligations, or personal inquiries in McKinney, TX.
Process & Collection Techniques
Urine Testing Limitations
Despite limitations, urine testing remains the primary and most critical means employed for substance evaluations.
Hair follicle testing is a dependable way to detect long-term substance use, offering a 90-day detection timeframe by evaluating drug metabolites present in the hair shaft. Unlike urine testing, which highlights recent consumption, hair examinations are invaluable for McKinney, TX's workplace programs, legal cases, and child custody scenarios requiring extensive substance use history insights.
Testing Protocols & Collection Approach
1. Donor Identity Confirmation
To initiate the collection, the donor provides government-issued ID, and chain-of-custody forms are completed to uphold course integrity.
2. Hair Collection Technique
Collection professionals retrieve a small hair sample typically 100-120 strands from the scalp's crown, or alternatively, body hair is used if needed. This quick, non-invasive process occurs under direct supervision.
3. Valid Chain of Custody Documentation
A Hair Drug Test Custody and Control Form records the sample's handling, ensuring legal defensibility.
4. Lab Preparation & Meticulous Analysis
The lab administers a multifaceted process, which includes hair decontamination, cutting/grinding for extracted matrix preparation, and immunoassay screening to detect drug classes, followed by GC/MS or LC/MS techniques confirming specific metabolites.
5. Metabolite Trapping Mechanism
As hair grows, drug metabolites become embedded, offering a non-tamperable historical record of substance use.
6. Certified MRO Review
For non-clear results, a certified MRO ensures result accuracy, examines potential medical justifications, and validates outcomes.
Turnaround Time for Hair Testing Results
Processing times are slightly longer compared to other tests, but hair examinations provide unmatched detection accuracy.
Limitations of Hair Testing for Drugs & Alcohol
Despite these challenges, hair testing stands as a reliable methodology for identifying prolonged substance use in a range of professional and personal contexts.
At Accredited Drug Testing, we offer a variety of robust alcohol and drug testing services tailored to meet the diverse requirements of employers, DOT mandates, legal obligations, and personal needs. Gaining a deeper understanding of how each testing option functions guarantees accurate selection, reliable outcomes, and full compliance with federal and state regulations. Through a nationwide network, accredited laboratories, and professional Medical Review Officers, we are dedicated to delivering precision, trust, and professionalism that McKinney, TX clients can rely on.
An alcohol urine test is designed to detect recent alcohol consumption by identifying ethanol metabolites present in the urine. This testing method is extensively used in workplace settings, for court-ordered screenings, and post-incident analyses. Despite not measuring immediate impairment, it offers a narrow detection window of a few hours, making it a fast, cost-effective option for screening purposes.
The EtG (Ethyl Glucuronide) urine test is recognized for its sensitivity, being capable of identifying alcohol consumption up to 80 hours after intake. As EtG is a direct metabolite of ethanol, the test is favored by courts, rehabilitation programs, and regulatory agencies for its reliability and extended detection timeframe.
The breath alcohol test gauges present impairment by measuring the alcohol concentration in deep lung air. Performed using DOT-approved breath devices (EBTs), it offers immediate, legally defensible results, fitting for DOT-covered employees, workplaces, post-incident, and suspicion-based testing.
A blood alcohol test directly quantifies the amount of ethanol in the bloodstream, making it one of the most precise methods to assess impairment. It is routinely employed by hospitals, law enforcement, and legal professionals in DUI cases, emergency healthcare, and significant legal inquiries.
The PEth (Phosphatidylethanol) blood test identifies chronic or heavy alcohol usage by recognizing alcohol-specific biomarkers within red blood cells. The test can track use up to 2-3 weeks and is considered an exceptionally reliable marker for long-term alcohol consumption behavior, making it ideal for family law, monitoring, treatment centers, and safety-sensitive pre-employment screenings.
With a hair EtG test, a 90-day detection window is provided by analyzing alcohol metabolites entrenched in the hair shaft, spotting recurring consumption habits rather than single events. Its stability, accuracy, and resistance to abstinence efforts make it a staple in courtroom proceedings, child custody disputes, and extended monitoring initiatives.
Through expert insight, certified nationwide laboratories, and prompt scheduling, Accredited Drug Testing guarantees that each alcohol screening test in McKinney, TX delivers clear, defensible, and compliant results, aiding individuals and businesses in maintaining informed decisions, managing safety, and adhering to all regulatory requirements.
Accredited Drug Testing provides nationwide drug and alcohol screening solutions, including urine, hair, EtG, PEth, and breath alcohol testing. Backed by SAMHSA-certified laboratories, DOT 49 CFR Part 40 compliance, and scientifically validated testing technology, our services ensure accurate, defensible, and confidential results for employers, courts, and individuals.
Urine tests detect recent use and are the only option approved for DOT testing under 49 CFR Part 40. Hair tests provide a 90-day detection window per the Society of Hair Testing (SoHT). Alcohol testing options, EtG, breath, blood, or PEth. These tests can identify recent use, impairment, or long-term drinking behavior depending on the method.
Urine: 24 - 48 hrs for negatives (SAMHSA guidelines).
Hair: 2 - 5 business days due to multi-step forensic processing (SoHT).
Breath Alcohol: Immediate results using NHTSA-approved EBT devices.
PEth: 3 - 5 days based on forensic toxicology studies.
Lab confirmation using GC/MS or LC/MS is the gold standard per SAMHSA & DOT.
Hair testing is highly tamper-resistant (SoHT).
PEth is considered the most reliable marker of repeated drinking (Journal of Analytical Toxicology).
No. DOT-regulated urine tests require validity checks and chain-of-custody documentation (49 CFR Part 40). Hair tests undergo decontamination and metabolite extraction (SoHT), making them extremely difficult to adulterate.
EtG urine detects alcohol for up to 80 hours (NIH/SAMHSA studies). EtG hair detects chronic alcohol consumption for up to 90 days (SoHT alcohol guidelines).
5 Panel DOT:49 CFR Part 40. Expanded non-DOT panels add benzodiazepines, barbiturates, methadone, oxycodone, MDMA, fentanyl, and more (SAMHSA forensic panel standards).
PEth blood testing identifies long-term and heavy alcohol use for 2 - 4 weeks. Used in child custody, treatment monitoring, and professional compliance programs (CDC & Journal of Analytical Toxicology).
Hair testing does not detect drug use within the past 5 - 7 days. It identifies long-term or repetitive use patterns per SoHT standards.
Yes. Results follow strict chain-of-custody procedures, DOT/SAMHSA requirements, GC/MS or LC/MS confirmation, and MRO review; making them acceptable in court, DOT, and legal settings.
Yes. Accredited Drug Testing offers same-day appointments at 20,000+ locations nationwide, instant testing options, and onsite employer testing with bulk discounts.
This is by far the easiest way to get my lab work ordered and paid for. The phone calls are short and to the point. They don’t try to push extra sales on you and when I walk in to the clinic I simply show my donor pass and with in a matter of minutes I’m done. I will continue to use ADT in the future.
Jason Jackson - 7/19/2025
Super easy to set up an appointment through the phone. They walked me through all the steps and found me a location right near my house. Would definitely recommend!
Aldita Lumaj - 1/17/2025
It was fast and easy a pleasure to talk to the customer service people great service
Peter Villegas - 1/19/2025
Where do I start?!! ADT is truly the best!! I had the pleasure of speaking with Tori today! She was excellent, professional and truly went above and beyond in her kind, compassionate care and commitment to providing me with the best service possible. I was in such a time crunch, but I was able to call, order the test, pay for it over the phone and get the test I needed within the hour. Not only did this put my mind at ease, they saved my job!! I am forever grateful for this team of hard workers, that care, with such great work ethics! Thank you from the very bottom of my heart!!! If you need a drug, alcohol, etc… screening, this team will be your lifesavers!!
Sarah Patterson - 4/8/2025
I ran into a situation because the Guthrie had closed and I had to go to well care and they were right on it. I had no problems when I called to get connected with welcare everything worked out and I didn't even have to wait.they were polite and talked with the receptionist for me once I got them on the phone.
Sayre - 8/19/2024
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