Office Disinfection Guide — When, Where, How Often
The actual disinfection protocol S&T Janitorial runs across Permian Basin office accounts — including how often each surface really needs disinfection, which chemistry to use, and what to do during an outbreak event.
Cleaning vs. Disinfection
These two terms are used interchangeably by consumers but are two different processes in commercial cleaning. Getting the order right matters — you cannot effectively disinfect a dirty surface.
| Process | What It Does | When Required |
|---|---|---|
| Cleaning | Removes visible soil + organic material | Every touch, every service |
| Sanitizing | Reduces germ count by 99.9% on food-contact | Kitchen + food service |
| Disinfecting | Kills 99.999% of pathogens (per EPA) | High-touch daily, medium-touch weekly, event-driven |
| Sterilizing | Eliminates all microbial life | Medical instruments only — not janitorial |
High-Touch Surfaces (Daily Disinfection)
Per CDC + EPA guidance, high-touch surfaces get disinfected every service. This is the standard baseline.
| Location | Surfaces | Chemistry |
|---|---|---|
| Entry / lobby | Door handles (interior + exterior), elevator buttons, front-desk pen | Accelerated H2O2 or EPA-registered quat |
| Restrooms | Faucet handles, flush handles, stall latches, dispenser handles | EPA-registered restroom disinfectant |
| Kitchen / breakroom | Refrigerator handles, microwave door + keypad, coffee maker, sink faucet | Food-safe EPA-registered disinfectant |
| Offices | Phone receivers, keyboards, mouse, chair armrests, drawer pulls | Accelerated H2O2 (electronics-safe) |
| Conference rooms | Chair arms, table edges, phone unit, remote control, whiteboard erasers | Accelerated H2O2 |
Medium-Touch Surfaces (Weekly)
- Desk surfaces (uncluttered zones — around monitor, in front of keyboard)
- Filing cabinet handles + drawer fronts
- Chair backrest + upholstery high-touch zones
- Wall switches beyond entry (interior room switches)
- Whiteboard trays + marker holders
- Cabinet handles in copy rooms + supply closets
- Trash bin lids (not just liner replacement)
- Interior door handles below waist height (kicked open in normal use)
Event-Driven Deep Disinfection
Some events require a full deep disinfection beyond the daily schedule. Below is the S&T protocol for each.
| Event | Response Window | Scope |
|---|---|---|
| Confirmed COVID / flu case in office | Within 24 hours | All areas the person occupied + high-touch site-wide |
| Norovirus (GI illness cluster) | Same-day | Restrooms + all shared surfaces with bleach |
| Post-construction / renovation | Before re-occupancy | Full HVAC + surface disinfection |
| Fire / smoke event | Before re-occupancy | HVAC + surface + soft goods |
| Flood / water intrusion | Within 24 hours | Antimicrobial + moisture remediation |
| Annual reset (typical August) | Scheduled | Full site electrostatic + carpet + upholstery |
Disinfectant Chemistry Choices
All disinfectants used on any commercial account must be EPA-registered. S&T's chemistry lineup by pathogen category:
| Product Category | Kills | Contact Time | S&T Note |
|---|---|---|---|
| Accelerated hydrogen peroxide (AHP) | Bacteria, TB, HIV, HBV, HCV, norovirus, coronavirus | 30–60 sec | Primary daily disinfectant |
| Quaternary ammonium ("quats") | Most bacteria, enveloped viruses | 10 min | Longer contact time = often not achievable |
| Sodium hypochlorite (bleach) | Everything including C. difficile spores | 5–10 min | Reserved for outbreak events |
| Peracetic acid | Broad-spectrum + spores | 1–5 min | Food service / medical use |
| Alcohol-based | Bacteria + enveloped viruses (not norovirus) | 30 sec | Electronics + point-of-service disinfection |
Contact Time — Why It Matters
Contact time is the single most misunderstood element of disinfection. EPA-registered disinfectants only kill pathogens if the surface stays wet for the labeled contact time.
| Common Failure | What Happens | Fix |
|---|---|---|
| Spray + wipe immediately | Chemistry evaporates before kill happens | Spray, wait full contact time, then wipe or air-dry |
| Contact time too long to be practical | Provider skips disinfection | Switch to AHP (30–60 sec contact) |
| Surface still visibly soiled | Disinfectant blocked from reaching pathogen | Clean first, then disinfect (two-step) |
| Diluted disinfectant left in bottle overnight | Chemistry degrades in dilute form | Prepare fresh at shift start |
Outbreak Response Protocol
- Step 1 — Notify. Facility manager notifies S&T account manager within 4 hours of confirmed case
- Step 2 — Isolate. Affected area cordoned off, HVAC damper closed if possible
- Step 3 — Wait. 24-hour wait period for airborne pathogen settling (CDC guidance for COVID-19)
- Step 4 — Clean. Full cleaning of all surfaces in affected area with detergent
- Step 5 — Disinfect. Two-pass disinfection with EPA List N registered product, full contact time
- Step 6 — Electrostatic (optional). Whole-area electrostatic fogging for surfaces that would be missed
- Step 7 — Re-occupy. Written completion report + surface swab test results (if requested)
Answers to the questions buyers ask first
The questions Permian Basin facility managers ask most often — with the honest answers from S&T's operations team.
Do we really need to disinfect daily, or is cleaning enough?
For most Permian Basin office accounts, high-touch daily disinfection is the CDC baseline and is what your insurance carrier expects if there's ever a workplace-illness claim. Medium-touch weekly is enough for surfaces that aren't touched by multiple people every day. If you're paying for daily disinfection everywhere in a low-traffic office, you may be overspending — the S&T account manager can right-size the schedule.
What's the difference between electrostatic spraying and regular disinfection?
Electrostatic spraying uses a charged aerosol to coat 3D surfaces evenly — it's a faster application method for large areas (200,000 sq ft in a full day). It's not "stronger" than regular disinfection — it uses the same EPA-registered chemistry. Use cases: post-outbreak whole-facility, warehouse + gym re-openings, and quarterly resets. Not needed for daily office service.
Is UV-C disinfection worth the investment?
For most commercial offices — no. UV-C is effective on line-of-sight surfaces but doesn't reach shadowed areas, and the equipment cost + safety protocol (UV-C damages skin/eyes) doesn't justify the coverage limitations. Medical facilities and food processing sometimes use it as an add-on. S&T doesn't recommend UV-C as a primary disinfection method for office accounts.
How do we handle disinfection of employee personal items (desk mugs, family photos)?
S&T's default policy is to not touch personal items. If desk-surface disinfection requires clearing personal items, we photograph the desk, disinfect, and replace items in their original position. For deep-clean events, we ask employees to clear their desk in advance. This is a liability + trust issue — the last thing we want is a broken picture frame.
What about air quality — does disinfection help with airborne pathogens?
Surface disinfection is only one piece — airborne pathogens require ventilation + filtration. Ask your HVAC provider about MERV-13+ filters and whether your system supports UV-C in-duct treatment. S&T can coordinate with HVAC on outbreak-response protocol but doesn't perform HVAC work directly.
How do we verify disinfection actually happened?
Three verification methods: (1) ATP swab testing (measures organic material — a proxy for cleaning quality, not disinfection per se), (2) written service log with time-stamps of disinfection at each zone, (3) surface culture testing (for medical-grade accounts). S&T provides the written service log on every account; ATP + culture testing available as add-ons for medical / food service.
Related Resources
Sibling resources for procurement & evaluation
Cost Guide
Data-dense pricing reference for commercial cleaning in Odessa & Midland.
Read →Program Checklist
Concrete evaluation checklist for auditing an existing janitorial program.
Read →Floor Care Schedule
Interval schedule for VCT, LVT, terrazzo, concrete, and carpet.
Read →Green Cleaning Guide
Green Seal + EPA Safer Choice chemistry lineup with cost comparisons.
Read →Disinfection Guide
Daily, weekly, and event-driven office disinfection protocols.
Read →Bids & RFPs
How S&T responds to municipal, ISD, and enterprise procurement.
Read →Ready to right-size your office disinfection program?
We'll audit your current schedule against CDC + EPA baseline and tell you where you're over-serving vs. under-serving.