ESD COMPLIANCE STANDARDS
STANDARD: ANSI/ESD S20.20
ESD ASSOCIATION STANDARD FOR THE DEVELOPMENT OF AN ELECTROSTATIC DISCHARGE CONTROL PROGRAM
WHAT THIS STANDARD GOVERNS
The program-level standard for ESD control in manufacturing and handling environments. S20.20 defines the requirements for an ESD control program, covering flooring, grounding, personnel grounding, and compliance verification. It also establishes the resistance limits and body voltage generation thresholds that all program elements must meet.
How We Address It
When the facility program, specification, and executed scope require S20.20 compliance, that standard governs the ESD flooring work we perform. Our material selection, grounding design, and testing protocols follow the applicable S20.20 requirements from the start. The flooring system remains one component of the facility’s broader ESD control program, not a standalone compliance program.
We verify compliance through the specific test methods S20.20 references: STM 7.1 for floor resistance, STM 97.1 for floor-footwear-person system resistance, and STM 97.2 for walking body voltage. Each method is run with calibrated instrumentation at the frequencies and electrode configurations the standard specifies. Results are documented in a format that maps directly to S20.20’s compliance verification requirements.
Our closeout documentation package is structured as an S20.20 compliance record. It gives your ESD coordinator the evidence to demonstrate that the flooring component of the program meets the standard’s requirements, in internal audits and customer audits alike.
- S20.20 compliance verification report
- System resistance classification (conductive / dissipative)
- Walking body voltage test results per STM 97.2
- Resistance-to-ground measurements per STM 7.1
- Point-to-point resistance measurements
- Grounding system documentation and connection details
- Material technical data with resistance specifications
- Calibration certificates for all test instrumentation
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STANDARD: IEC 61340-5-1
PROTECTION OF ELECTRONIC DEVICES FROM ELECTROSTATIC PHENOMENA — GENERAL REQUIREMENTS
WHAT THIS STANDARD GOVERNS
The international counterpart to ANSI/ESD S20.20. IEC 61340-5-1 defines ESD control requirements for facilities that operate under European or international compliance frameworks. Multinational operators building in the U.S., and U.S. facilities supplying international clients, frequently see this standard specified alongside or instead of S20.20.
How We Address It
The resistance limits and body voltage thresholds in IEC 61340-5-1 align closely with S20.20, but the compliance documentation expectations differ in structure and terminology. We have experience delivering documentation packages that satisfy both standards at once, which is essential for hyperscaler operators with facilities across multiple countries who standardize on a single ESD program specification.
Specifications that call for IEC 61340-5-1 compliance get test procedures, a reporting format, and compliance verification documentation matched to that standard’s terminology and structure. The testing itself is substantially identical; the paper trail needs to speak the auditor’s language.
- IEC 61340-5-1 compliance verification report
- Resistance measurements per IEC test methodology
- Body voltage generation verification
- Documentation formatted to IEC compliance structure
- Dual-standard compliance report (when both specified)
STANDARD: ANSI/ESD STM 7.1
FLOOR MATERIALS — RESISTANCE TESTING
WHAT THIS STANDARD GOVERNS
The test method standard for measuring the electrical resistance of floor materials and installed flooring systems. STM 7.1 defines electrode configurations, applied voltages, measurement procedures, and environmental conditioning requirements for resistance-to-ground (RTG) and point-to-point resistance testing of ESD flooring.
How We Address It
When required by the facility program, specification, and executed scope, completed ESD flooring is tested per STM 7.1 at project completion. Resistance-to-ground measurements follow the intervals and electrode placements the standard specifies, not self-selected “representative” locations. Testing uses 5-lb cylindrical electrodes on the installed surface, with the voltage and measurement timing parameters STM 7.1 requires.
We test at the environmental conditions present in the operating facility, not at laboratory-ideal conditions. STM 7.1 specifies that temperature and humidity be recorded at the time of measurement. Our reports carry those conditions alongside every resistance reading, because an auditor will look for them.
Results are mapped to floor plan locations so your facilities team can identify the exact test point for any measurement in the report. That spatial record supports future retesting, maintenance planning, and audit defense.
- Resistance-to-ground (RTG) measurements mapped to floor plan
- Point-to-point resistance measurements mapped to floor plan
- Environmental conditions at time of each measurement
- Electrode configuration and applied voltage documented
- Pass/fail determination per S20.20 resistance limits
- Instrument identification and calibration certificate
- Test technician identification
STANDARD: ANSI/ESD STM 97.2
FLOOR MATERIALS AND FOOTWEAR — VOLTAGE MEASUREMENT IN COMBINATION WITH A PERSON
WHAT THIS STANDARD GOVERNS
STM 97.2 measures the body voltage a person generates while walking on an installed flooring system in specified footwear. It quantifies the electrostatic charge that actually accumulates on a person in the real operating environment, the number that determines whether the floor will protect sensitive components from ESD damage during handling. Its companion method, STM 97.1, measures the resistance of the same floor-footwear-person system (Rg) rather than the voltage it generates.
How We Address It
Walking body voltage testing is performed on the installed floor using the footwear type specified for the facility’s ESD program, typically ESD-rated shoes or heel straps per S20.20 requirements. The test subject walks a defined path while body voltage is measured continuously, capturing the peak voltage generated under actual use conditions.
S20.20 requires body voltage below 100 volts for most ESD-sensitive environments, though many semiconductor and electronics manufacturing facilities specify tighter limits based on the HBM sensitivity of their components. We test to your facility’s specific threshold, not the standard’s default alone, and document the applicable limit alongside the measured results.
This is the test that matters most to your ESD coordinator because it measures the actual risk to components. It reports a system result, not a material property: the floor, the grounding, the footwear, and the environment working together.
- Peak body voltage measurements (multiple walk paths)
- Footwear type and specification documented
- Walking path locations mapped to floor plan
- Environmental conditions (temp, RH) at time of test
- Pass/fail against facility-specific voltage threshold
- Pass/fail against S20.20 default (< 100V)
- Instrument calibration certificate
SUBSTRATE & MOISTURE TESTING
STANDARD: ASTM F2170
STANDARD TEST METHOD FOR DETERMINING RELATIVE HUMIDITY IN CONCRETE FLOOR SLABS USING IN SITU PROBES
WHAT THIS STANDARD GOVERNS
The primary test method for evaluating moisture conditions inside a concrete slab before coatings, adhesives, or flooring systems are applied. F2170 uses in-situ probes to measure the internal relative humidity of the concrete at a specified depth, a direct reading of the moisture condition that will affect coating adhesion and system performance.
How We Address It
Where the facility program, specification, and executed scope require F2170, we perform the test on concrete substrates scheduled to receive a coating or overlay. Test holes are drilled to 40% of the slab depth for slabs drying from one side, or 20% of depth for slabs drying from both sides. We install in-situ RH probes and let them equilibrate for the minimum 24-hour period before recording measurements.
Test hole frequency follows the standard’s requirements: a minimum of three holes for the first 1,000 square feet, plus one additional hole per 1,000 square feet thereafter. On large data center or manufacturing slabs, that adds up to dozens of test points, each documented with location, depth, equilibration time, and measured RH.
RH readings above the coating manufacturer’s threshold (typically 75% RH for epoxy systems, though manufacturer limits vary) trigger a moisture mitigation system that we design and document for the conditions. This isn’t a change order surprise. Moisture testing happens early enough in the project sequence that mitigation is planned, specified, and budgeted before installation begins.
- RH readings mapped to floor plan by test location
- Drill depth documented per test hole
- Equilibration time documented (24+ hours)
- Ambient temperature and RH at time of reading
- Manufacturer’s maximum RH limit identified
- Pass/fail determination per manufacturer threshold
- Moisture mitigation recommendation (if required)
- Probe calibration verification
STANDARD: ASTM F1869
STANDARD TEST METHOD FOR MEASURING MOISTURE VAPOR EMISSION RATE OF CONCRETE SUBFLOOR USING ANHYDROUS CALCIUM CHLORIDE
WHAT THIS STANDARD GOVERNS
A surface-level moisture test that measures how fast moisture vapor escapes from the top of a concrete slab over a defined period. F1869, the “calcium chloride test,” has been the flooring industry’s traditional moisture test for decades. Some coating manufacturers and project specifications still call for it, though F2170 has become the preferred method for most engineered flooring systems.
How We Address It
Where F1869 is specified, we run it to the standard’s requirements: sealed calcium chloride dishes on a clean, dry slab surface for 60-72 hours, with weight gain measured to calculate moisture vapor emission rate (MVER) in pounds per 1,000 square feet per 24 hours. Test locations follow the same frequency protocol as F2170.
We typically recommend F2170 as the primary moisture test and offer F1869 as a supplementary or specification-required test. F2170 measures internal slab conditions directly. F1869 measures only the surface emission rate, which can be influenced by ambient conditions and does not reflect the moisture condition deeper in the slab. Many coating manufacturers have moved to F2170 as their specified acceptance test.
If both tests are run, results are presented together with the applicable manufacturer thresholds for each. Your engineer gets the complete moisture picture, and the record supports specification compliance regardless of which standard was referenced.
- MVER results (lbs/1,000 SF/24 hrs) per test location
- Test location mapped to floor plan
- Exposure duration documented (60-72 hours)
- Ambient conditions during test period
- Manufacturer’s maximum MVER threshold identified
- Pass/fail determination
- Comparison with F2170 results (when both performed)
SURFACE PREPARATION & SLAB QUALITY
STANDARD: ICRI 310.2
SELECTING AND SPECIFYING CONCRETE SURFACE PREPARATION FOR SEALERS, COATINGS, POLYMER OVERLAYS, AND CONCRETE REPAIR
WHAT THIS STANDARD GOVERNS
ICRI 310.2 is the industry-standard guideline for specifying and evaluating the concrete surface profile (CSP) that coating and overlay adhesion requires. It defines a scale of CSP 1 through CSP 10, running from nearly smooth to heavily abraded, and supplies visual reference comparisons (rubber profile chips) so surface preparation can be verified in the field.
How We Address It
Every coating system has a manufacturer-specified CSP range for proper adhesion. ESD epoxy systems typically require CSP 2-4, reached with diamond grinding or light shot blasting. Urethane cement systems often require CSP 3-5, which takes aggressive shot blasting. We pull the required profile from the manufacturer’s technical data, prepare the surface to that specification, and verify it against ICRI reference chips in the field.
Surface profile is documented and photographed at representative locations before coating application begins. That pre-application documentation serves two purposes: it confirms that the substrate is properly prepared for the specified system, and it creates a defensible record that surface preparation met the manufacturer’s requirements, which is critical for warranty enforcement.
Inadequate surface preparation is the most common cause of coating failure. We put the time and equipment into achieving the correct profile because every downstream performance metric depends on what happens at the concrete surface before the first coat is applied: adhesion, resistance, durability, warranty validity.
- Target CSP range per manufacturer specification
- Achieved CSP documented by area
- ICRI chip comparison verification
- Pre-application surface photography
- Surface preparation method documented
- Adhesion test results (where specified)
- Contamination removal verification (oil, curing compounds)
STANDARD: ACI 302.1R
GUIDE FOR CONCRETE FLOOR AND SLAB CONSTRUCTION
WHAT THIS STANDARD GOVERNS
The American Concrete Institute’s comprehensive guide for the design, construction, and quality control of concrete floor slabs. ACI 302.1R classifies floors by use, from residential to heavy industrial, and defines flatness and levelness tolerances (F-numbers). It also sets best practices for concrete placement, finishing, curing, and joint design, all of which affect how any flooring system applied over the slab performs.
How We Address It
ACI 302.1R is the reference we use to evaluate whether a concrete slab is suitable to receive a coating or overlay system. Before we install anything, we assess the slab for the conditions ACI 302.1R addresses: flatness, levelness, surface defects, joint condition, curing compound residue, and overall slab quality. Each of these conditions directly affects the installed flooring system’s performance and appearance.
Slab conditions outside acceptable parameters (excessive waviness, poorly cut joints, surface contamination from curing compounds, or structural cracking) are documented and reported to the project team, with corrective action recommended before we proceed. Identifying them this early prevents downstream failures and change orders.
On new construction projects where we’re engaged during design, we provide input on the slab specifications that affect flooring performance: curing methods compatible with the coatings to come, flatness tolerances suited to the flooring system, and joint design that minimizes reflective cracking through the finished floor. Getting involved before the slab is poured is the highest-value point of intervention for flooring system performance.
- Pre-installation slab condition assessment
- Flatness/levelness evaluation (F-number reference)
- Joint condition and layout documentation
- Surface defect and contamination report
- Corrective action recommendations (if required)
- Curing compound compatibility assessment
- Pre-pour specification input (new construction)
ESD Flooring Knowledge Center
Resource links
Compliance Requirements & Testing
- Facility-Specific ESD Requirements
- Recurring ESD Floor Verification
- Electrodes for floor resistance testing — Compare electrode specifications and contact checks across the named methods.
- Resistance-meter requirements by method — Match the instrument’s range, voltages and capabilities to the specified test.