At Spokane Testing Solutions, we offer affordable laboratory services to businesses and individuals. Whether you are looking to settle a personal matter or create safer work environments, explore our resources below.

Screening vs. Lab Confirmation

  • Initial drug screening uses immunoassay that uses antibodies to detect the presence of drugs and other substances. It does not measure the specific amount of drug present. It provides either a “negative” or a “non-negative” result.
  • Gas chromatography/mass spectrometry or GC/MS, is the method used to confirm presumptive positive drug screen specimens. GC/MS detects specific metabolites that provide identification and quantification of a specific drug.
  • MRO – Medical Review officer – Only person that can change a positive to a negative result.
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Types of Drug Testing

  • Blood
  • Saliva / Oral
  • Urine
  • Hair
  • Fingernail
  • Sweat Patch
  • Passive Exposure

Blood Testing

  • Very Invasive
  • Most Expensive
  • Correlates with impairment
  • Adulteration proof
  • Limited Window of detection
spokane-blood testing-resources
  • Amphetamines (except meth): 12 hours
  • Methamphetamine: 24 hours
  • Barbiturates (except phenobarbital): 1 — 2 days
  • Phenobarbital: 4 — 7 days
  • Benzodiazepines: 6 — 48 hours
  • Cannabis: 2 days
  • Cocaine: 24 hours
  • Codeine: 12 hours
  • Morphine: 6 hours
  • Heroin: 6 hours
  • LSD: 0 — 3 hours
  • Methadone: unknown
  • PCP: 24 hours

Blood analysis may be appropriate in situations when it is suspected that a person is actively under the influence of a drug or alcohol.

Saliva / Oral Drug Testing

  • Less Invasive vs other tests
  • Tests for drug usage 24-48 hours
  • Good indicator of recent drug use
  • Can be performed anywhere with instant results
  • Reduces Adulteration / “Shy Bladder” Issues
  • 12 drug substances / panels
  • Non-negatives can be sent for lab confirmation
saliva - resources
urine testing 1
urine testing -resources

Urine Testing

  • Most commonly accepted and used
  • Detection window varies by drug but generally 2-5 days; THC exception
  • Detects drug metabolite and not parent drug
    15+ drug categories / panels
  • Can be POCT (instant test) and/or lab based
  • Court ordered “observed” collections eliminates possible adulteration

Hair Testing

  • Tests for “habit”, not recent usage
  • Test for drug usage for up to 90 days and after ~ 5 to 10 days from ingestion
  • 1 ½ “ of head hair preferred but can test any body hair
  • Head hair grows 1/2” per month while body hair grows more slowly
  • Reduces adulteration and “Shy Bladder” Issues
  • Tests for both “Parent Drug “ and “Drug Metabolite”
  • Most common test panels are 5 panel with expanded opiates; but can be extended to include up to 18 substances
hair testing - resources
science of hair testing - resources (1)

The Science of HAIR Testing

Hair is like a tape recorder when it comes to testing for drug usage over a 90 day window.

  • Drug molecules are deposited in the blood
  • Hair develops beneath the skin and is fed by blood vessels
  • Ingested drugs molecules accumulate permanently in hair and are trapped within protein keratin creating a historical record of substance abuse
  • Hair is stripped and washed before testing
  • Hair particles are reduced to a liquid form for lab analysis
  • Quantification is measured and reported in picograms per milligram

Passive Exposure Testing

passive exposure testing

Positive Passive Exposure Result

Hair or Nail test (5 – 7 – 9 panels)

Amphetamines, cannabinoids (THC), cocaine, opiates, phencyclidine (PCP),
benzodiazepines, barbiturates, methadone, and propoxyphene.

A positive passive exposure result indicates that the person has experienced one or more of the following:

  • Passive inhalation of drug smoke
  • Contact with drug smoke
  • Contact with sweat or sebum (skin oil) of a drug user
  • Contact with the physical drug substance
  • Accidental or intentional ingestion of illegal drugs


passive exposure testing
finger and toenail testing

Finger & Toenail Testing

  • Nails, like hair, are made of the protein keratin
  • Drugs are incorporated into nails from the blood stream and remain locked in the nail as it grows
  • Drugs enter the nail from the base as the keratin is formed and via the nail bed that extends under the full length of nail
  • Drugs can be identified in nail clippings as early as 1-2 weeks following ingestion
  • Can detect drugs in fingernails up to 6 months after last usage & up to 12 months in toenails
  • Test panels available up to 15 substances
  • Nails must be clean of dirt and polish before testing

Testing for Alcohol - EtG/EtS

  • Breath Alcohol (detects for hours)
  • Blood Alcohol (detects for hours)
  • Saliva Alcohol (detects for hours)
  • Urine EtG/EtS test (80 hours)
  • Hair EtG test (90 days)

EtG (ethyl glucuronide) and EtS (ethylsulfate) are biomarkers for ethanol and are only present when ethanol is ingested.

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Sweat Patch Testing

  • 24/7 Monitor – great deterrent
  • Yields drug usage from 3-4 days prior to application thru the duration of time the patch is worn (12 days)
  • Testing is limited to marijuana, cocaine, opiates, amphetamines, methamphetamine & PCP
  • Sweat is extracted from cellulose patch for analysis
  • Patch allows water & air molecules to pass through; while trapping larger drug metabolite molecules
  • Designed to be tamper evident

Testing Overview

testing overview chart

** THC up to 30 days

Drug panels can be customized to meet specific needs!

dna testing

  • AABB-Accreditation Lab
  • Immigration Services
  • Paternity, Maternity, Avuncular, Grandparentage, Siblingship
  • Deceased specimen collection and testing
  • Working relationship with County Medical Examiner
  • Infidelity testing
  • DNA viability and banking services
dna testing

Answers to frequent questions...

Q: Can eating poppy seeds cause a positive drug test?
A: Yes. Poppy seeds contain low levels of morphine which can affect an initial screening. Best practice is to avoid poppy seeds before any testing.

Q: Do you pull the hair out for a hair test?
A: No. We cut the hair as close to the scalp as possible.

Q: Does drinking a lot of cranberry juice or other “cleansing” products work?
A: No. They can dilute or affect Ph levels, but can’t get rid of the drug metabolites.

Q: Can you test for synthetic drugs?
A: Yes. Marijuana, Cocaine and Opiates have synthetic versions and can be tested as requested.