FACILITIES ENGINEERING | CRITICAL INFRASTRUCTURE
Data Centre Particulate & Air Quality Testing
Quantitative particle counts, surface contamination testing and zinc whisker sampling — with NATA-style reporting so you have evidence, not assumptions.
Document Type: Facility Testing Specification Version: 1.0
Prepared for: Classification: Internal
Contents
1 Purpose & Service Overview……………………………………………………………………………………….. 3
2 Scope of Services………………………………………………………………………………………………………. 3
3 Testing Process & Sequence………………………………………………………………………………………… 4
4 Standards & Reference Frameworks……………………………………………………………………………… 4
5 Roles & Responsibilities……………………………………………………………………………………………… 5
6 Service Benefits………………………………………………………………………………………………………… 5
7 Next Steps………………………………………………………………………………………………………………. 5
1 Purpose & Service Overview
Contamination in a data centre is rarely visible to the naked eye until it has already caused damage — a corroded connector, a failed board, an unexplained outage. Airborne particulate, settled dust and zinc whisker growth all accumulate silently, and by the time symptoms appear, the underlying cause is often difficult to trace back with confidence.
This service specification sets out DCS Australia’s Particulate & Air Quality Testing program — independent, quantitative testing that verifies white space and sub-floor air quality against recognised cleanliness thresholds, giving you trend data and evidence rather than assumptions.
Service Objectives
- Quantify airborne cleanliness — against ISO 14644-1 classification benchmarks.
- Detect zinc whisker contamination — before it causes unexplained equipment failure.
- Screen for gaseous corrosion risk — using recognised ASHRAE reactivity guidance.
- Track trends over time — so gradual degradation is caught before it becomes critical.
- Provide independent, auditable evidence — to support compliance, warranty and insurance requirements.
2 Scope of Services
The service covers the following core work streams, described in detail below:
- Airborne particulate counting
- Surface contamination (dust deposition) testing
- Zinc whisker sampling
- Gaseous contamination screening
- Detailed test reporting
2.1 Airborne Particulate Counting
Laser particle counter sampling at defined points across white space, sub-floor and CRAC/CRAH intakes, benchmarked against ISO 14644-1 cleanroom classification for IT environments.
2.2 Surface Contamination (Dust Deposition) Testing
Witness plate or swab sampling at raised-floor, cabinet and equipment intake locations to quantify settled particulate load — capturing contamination that airborne counts alone can miss.
2.3 Zinc Whisker Sampling
Adhesive lift sampling of galvanised surfaces — raised-floor tiles, cable trays and support structures — with laboratory analysis to detect zinc whisker growth, a leading cause of unexplained equipment failure that most cleaning providers don’t test for.
2.4 Gaseous Contamination Screening
Corrosion classification coupons assess sulphur- and chlorine-bearing compounds in the air, identifying corrosive risk to electronics per ASHRAE TC 9.9 guidance.
2.5 Detailed Test Reporting
Every engagement produces a NATA-style test report with quantitative results, trend comparison against previous cycles, and clear flagging of any readings approaching or exceeding threshold.
3 Testing Process & Sequence
Sampling is carried out on a live, energised floor without disrupting normal operations. The table below outlines the standard sequence of works.
| Stage | Activity | Frequency | Purpose |
| 1. Sampling plan | Define sampling points across white space, sub-floor and CRAC intakes | Per engagement | Ensure results are representative and repeatable between cycles |
| 2. Airborne particulate counting | Laser particle counter sampling at each defined point | Per engagement | Benchmark cleanliness against ISO 14644-1 classification |
| 3. Surface dust deposition sampling | Witness plate or swab sampling at raised-floor and equipment intake locations | Per engagement | Quantify settled particulate load on critical surfaces |
| 4. Zinc whisker sampling | Adhesive lift sampling and lab analysis of galvanised surfaces | Per engagement | Detect zinc whisker contamination before it causes equipment failure |
| 5. Gaseous contamination screening | Corrosion classification coupons for sulphur and chlorine-bearing compounds | Per engagement | Assess corrosive risk to electronics per ASHRAE guidance |
| 6. Reporting & trend analysis | Lab results compiled into a NATA-style test report with trend comparison | Per engagement | Provide auditable evidence and flag results approaching threshold |
4 Standards & Reference Frameworks
The service is designed to align with recognised industry frameworks, including:
- ISO 14644-1 — Cleanroom and associated controlled environment classification
- ASHRAE TC 9.9 — Data centre thermal guidelines and gaseous/particulate contamination guidance
- ANSI/ISA-71.04 — Corrosion classification for airborne contaminants
- Manufacturer environmental specifications for IT and mechanical equipment
Where local regulatory, insurance, or client contractual requirements impose additional standards, these should be layered on top of the baseline scope above rather than replacing it.
5 Roles & Responsibilities
| Role | Responsibility |
| Facility Operations Manager | Approves the testing scope, sampling locations, and access windows |
| DCS Sampling Technicians | Perform particle counts, surface sampling, and zinc whisker lift sampling to procedure |
| Contamination Control Specialist | Interprets laboratory results against ISO/ASHRAE limits and prepares the test report |
6 Service Benefits
- Early detection — of contamination trends before they cause equipment failure or unplanned outages.
- Independent evidence — quantitative, third-party results rather than visual assumptions.
- Warranty and compliance support — documented results satisfy manufacturer, insurer and audit requirements.
- Root-cause clarity — trend data helps distinguish genuine contamination events from one-off anomalies.
7 Next Steps
We recommend an initial baseline test covering particulate counts, surface deposition, zinc whisker sampling and gaseous screening, establishing a benchmark against which future testing cycles are measured.
This document is a service specification and should be reviewed against site-specific engineering, insurance, and regulatory requirements before implementation.