March was quiet. Four incidents logged. Two near-misses. Your H&S board looked manageable.
Then April arrives. Projects that were specs in February are suddenly live. The seasonal crew you interviewed last month are on-site this week. That transport contract you tendered for in January? It starts Monday.
And in the first two weeks of April, your workplace population just increased by 30%.
Most safety managers know this pattern. What fewer do is build the buffer before it happens.
The Spring Inflection Point
April isn't just busy - it's compositionally different. You're not managing the same team at higher volume. You're managing new people, in new configurations, often doing work they haven't done since last season.
In construction, it's the ramp-up. Projects shelved over winter come back online. Site teams expand. Subcontractors rotate in. The foreman who's been with you five years is now supervising three people he met on Monday.
That's when the gap appears. Not in your systems - those are still solid. In the assumptions those systems make about who's on site and what they know.
What Actually Changes (And What Doesn't)
Your drug and alcohol protocols don't change in April. The testing equipment doesn't either. What changes is the proportion of your workforce who've never seen them applied.
Last month, you had 40 people. Thirty-five had been through your induction. They'd seen the screening process. They understood what triggers a test and why it matters.
This month, you have 55 people. Fifteen are new. Seven are returning from last season but can't quite remember the detail. Two are subcontractors operating under their own company's policy - which isn't the same as yours.
That's not a training problem. Well, not just a training problem. It's a consistency problem.
The Review That Actually Matters
Spring safety reset doesn't mean rewriting your policy document. It means checking whether the safety system that worked in February still holds in April when the variables change.
Three things worth looking at:
Who knows what's expected
Not what's written in the handbook. What people actually understand about how screening works, when it happens, and what the consequences are. If a third of your team is new, a third of your team is operating on assumption rather than knowledge.
Whether your testing schedule still fits
Random testing works when the population it's sampling is relatively stable. When that population shifts - new starters, seasonal workers, people rotating between sites - the randomness can accidentally become predictable. Or it misses entire groups because they weren't on the original schedule.
How information moves now that the team's bigger
In February, a safety briefing reached everyone because everyone was in the same place at the same time. In April, you've got split shifts, multiple sites, people starting on different days. The same information process doesn't have the same coverage.
None of that requires new policy. It requires checking that the implementation still matches the intention.
What Gets Missed
The assumption that compliance in March means compliance in April.
We've worked with construction firms where winter screening records were flawless. Full participation. No refusals. Clear documentation. Then spring arrives, the team doubles, and suddenly there are gaps. Not because the new people refused - because nobody told them it was happening that week.
It's not deliberate. It's compositional. The safety manager who scheduled testing in February scheduled it for the team they had in February. The expanded team in April doesn't automatically inherit that schedule unless someone actively updates it.
The same thing happens with communication. Winter toolbox talks reached 100% of the workforce because the workforce fit in one room. Spring toolbox talks reach 70% because three people were at the other site, two started after the talk happened, and one was off that day. The content's the same. The reach isn't.
The Screening Conversation Worth Having
April's a good time to talk to your screening provider. Not about changing what you do - about whether what you do still covers what you need it to cover.
Questions worth asking:
Does your current testing frequency account for the seasonal increase? If you were testing 10% of 40 people monthly (four tests), and you've now got 55 people, are you still testing four people or have you scaled to match the new population?
Are new starters being screened as part of onboarding, or are they waiting for the next scheduled random test? If it's the latter, you might have people on-site for three weeks before they're included in the testing pool.
Do your subcontractors know your screening requirements, or are they operating under their own company's policy? And if it's the latter, do you know what that policy actually says?
These aren't gotcha questions. They're gap questions. The kind that reveal whether your spring operation is covered or just feels covered.
The April Action
You don't need to overhaul anything. You need to check three things:
Coverage. Does your screening programme account for everyone who's actually on-site now, or is it still sized for your winter team?
Communication. Do new starters and returning seasonal workers understand your screening process before it affects them, or are they learning about it in real-time?
Consistency. If someone asked three different supervisors how drug and alcohol screening works here, would they get the same answer?
If the answer to any of those is "probably not," April's when you fix it. Not because there's been an incident but because the conditions that create incidents just arrived.
Spring isn't when things go wrong. It's when the things that lead to things going wrong quietly accumulate.
Most safety managers catch it by June. The better ones catch it in April, when there's still time to close the gap before it matters.
Need to review your screening programme before the spring ramp-up? Get in touch. We'll walk through what's changed since winter and whether your current approach still fits.
