A pre-qualification questionnaire arrives from a client. Somewhere on page four, between insurance certificates and incident history, sits a single line: Describe your drug and alcohol test policy, including frequency and record-keeping. There is no box for "we deal with it case by case."
That line is now common in Indian contracting, in logistics tenders, in facility management bids and in the vendor audits run by multinational manufacturers. The honest answer for many organisations is that they have never formally decided anything. Someone senior sends a driver home when he smells of alcohol, and that is the extent of the system.
This article is about turning that into a decision you can defend: what a drug and alcohol test actually measures, what it proves and does not prove, what you should run yourself, and what belongs in a laboratory.
A drug and alcohol test is really two different tests
The phrase gets used as if it were one procedure. It is not. Alcohol and drugs behave differently in the body, are collected differently, and answer different questions.
Alcohol screening is a breath test, done on the spot, with a result in seconds. It measures what is in the person right now. Drug screening is usually a urine or oral fluid test, checking for drug metabolites, and it tells you about recent use across a window of hours or days.
Alcohol screening Drug screening
Usual sample Breath Urine or oral fluid
Where it happens At the gate, in the yard, at the venue Collection room, clinic, or on-site with a kit
Result time Seconds Minutes for a screening panel; days for lab confirmation
What it indicates Current alcohol concentration Presence of a drug or its metabolite in a detection window
Who usually runs it Your own trained supervisor Occupational health provider or diagnostic lab
Repeatable in-house Yes, daily, at low cost per test Consumable per test, chain of custody needed
That split matters commercially. Alcohol is the risk you face every single shift, and the one you can screen for cheaply and repeatedly. Drugs are the lower-frequency, higher-complexity problem that is usually better outsourced. The division is explained in more detail in Alcohol and Drug Testing Near Me: What to Own, What to Send Out.
What a drug and alcohol test shows
A breath alcohol test shows breath alcohol concentration, which correlates closely with blood alcohol concentration. For context, under Section 185 of the Motor Vehicles Act, 1988, driving with more than 30 mg of alcohol per 100 ml of blood is an offence in India. Most workplaces that carry real risk set their internal threshold at zero for safety-critical roles, because a driver, crane operator or furnace hand at a "legal" level is still an operator you would not want on shift.
A drug screening panel shows whether a substance or its metabolite is present above a cut-off level. Common panels cover cannabis, opiates, amphetamines, benzodiazepines and cocaine. A positive screen is an indication, not a conclusion. It is confirmed in a laboratory before anyone acts on it.
What neither test shows is impairment as a doctor would define it. A cannabis metabolite can sit in urine long after any effect has passed. A prescribed medication can produce a positive result for an entirely lawful reason. This is exactly why the policy around the test matters more than the test itself: the result is evidence, and the policy decides what you do with evidence.
How long alcohol stays in the system
Alcohol clears far faster than most drugs. The body eliminates it at a roughly steady rate, so a heavy evening usually leaves breath alcohol detectable into the following morning, and a very heavy one can carry into a morning shift. There is no way to speed it up with coffee, food or a cold shower.
This is the source of most disputes at Indian sites. The person genuinely believes he is sober because he stopped drinking at midnight. The instrument disagrees. Both can be right in their own way, and only one of them is measurable.
Standard urine drug panels are generally not designed to detect alcohol at all; alcohol is captured by breath, blood, or specific alcohol-marker tests. If you need a defensible number rather than a screening indication, the comparison in Alcohol and Blood Test: When the Lab Is Needed and When Breath Is Enough sets out when it is worth escalating to a laboratory.
When you should be testing
A credible programme names its trigger points in writing and applies them without exception. Five are standard:
• Pre-employment or pre-deployment. Before a person is placed in a safety-critical role.
• Random. A defined percentage of the workforce, selected by a method nobody can influence.
• Post-incident. After an accident, a near-miss, or damage to plant and vehicles.
• Reasonable suspicion. Based on documented observation by a trained supervisor, never on rumour.
• Return to duty. After a positive result and whatever remedial process your policy sets out.
The weakest programmes test only after something has gone wrong. By then the test is documentation, not prevention. Random and pre-shift screening are what actually change behaviour, because the deterrent lives in the possibility of being tested on any given day.
Who carries the consequence
When an intoxicated forklift operator injures a colleague, the operator loses his job. The safety head explains to the client why screening was not in place. The occupier under the Factories Act answers for the condition of the workplace. The transport manager explains to the insurer why a driver was dispatched. In a contract environment, the principal employer is drawn in regardless of whose payroll the person was on.
For fleets, the exposure runs further, because an impaired driver on a public road brings criminal liability into a commercial file. That chain is traced in Driving Under the Influence of Alcohol: The Law, the Test and the Employer's Exposure.
None of those people are in the room when the decision is skipped. They are all in the room afterwards.
Own the alcohol test, outsource the drug panel
For most Indian operations, the practical structure is straightforward.
Alcohol screening should sit in-house. It is the daily risk, it needs to happen at the gate before the shift starts, and waiting for an external provider defeats the purpose. A fuel-cell based professional unit gives a numeric reading and holds accuracy across repeated tests, which matters when you are screening fifty people in twenty minutes. Comparing alcohol testing machines by sensor type, throughput and calibration interval is the part worth doing carefully, because a cheap semiconductor unit that drifts within months will generate disputes rather than settle them.
Drug testing is better placed with an occupational health provider or accredited laboratory, unless you run a large, dispersed workforce that justifies trained in-house collectors and proper chain-of-custody handling. The trade-offs are laid out in Drug and Alcohol Tester: What to Screen, What to Outsource, and What Your Policy Must Say.
What the person being tested should expect
Tell them in advance. Surprise is not a deterrent, uncertainty is just resentment.
For breath alcohol: a fresh mouthpiece is fitted, the person blows steadily until the instrument signals, and the reading appears within seconds. A short wait after eating, smoking, or using mouthwash avoids false high readings from mouth alcohol. If the reading is positive, the standard practice is a confirmatory second test after a brief interval.
For a urine drug screen: identity is verified, personal belongings are set aside, the sample is provided in a controlled collection area, and it is sealed and labelled in front of the donor. The donor signs the chain-of-custody form. A non-negative screen goes to the laboratory for confirmation, and the person is usually stood down from safety-critical work in the meantime rather than dismissed.
Building the policy before you buy the device
A device without a written policy produces readings nobody can act on. Write down, at minimum: who is covered, the trigger points, the thresholds, who is authorised to test, what happens on a refusal, how records are stored, and what the pathway is after a positive result.
Refusal deserves particular attention. If your policy does not state that a refusal is treated as a positive result, refusal becomes the easiest way around the entire programme.
Keep the records. Date, time, tester, reading, action taken. When a client audits you, when an insurer asks, or when a dismissal is challenged, the register is what turns a routine drug and alcohol test into something that stands up. A step-by-step implementation sequence for Indian sites is set out in Drug and Alcohol Tester: A Practical Guide for Indian Sites.
The decision in front of you
The questionnaire on the desk does not really ask whether you test. It asks whether you have decided. Screening has become a normal condition of doing business in Indian construction, logistics, mining, manufacturing and hospitality, and the organisations that treat it as routine spend far less time explaining themselves than the ones that treat it as an event.
Start with the risk you face every shift. Put a reliable breath alcohol screening process at the gate, write the policy that governs it, and arrange laboratory drug testing for the triggers that warrant it. That is a programme, and it takes a week to set up.