Archive
August 2026
25 guides published this month.
The BAT Proficiency Demonstration: Seven Mock Tests Explained
What the seven consecutive error-free mock tests in a BAT proficiency demonstration cover, how the monitoring instructor evaluates them, and what fails a candidate.
6 min read Read →Hearing ConservationCombining Audiometry, Spirometry, and Fit Testing in One Onsite Visit
How to schedule audiometric, spirometry, and respirator fit testing in a single onsite occupational health visit without compromising any one test's requirements.
5 min read Read →Calibration & InstrumentsAudiometer Exhaustive Calibration: What ANSI S3.6 Actually Tests
The specific electroacoustic parameters an exhaustive audiometer calibration checks under ANSI S3.6, and why an instrument that passes daily use can still fail this test.
5 min read Read →Breath Alcohol TestingAlcohol Testing Form: Completing DOT Paperwork Without Voiding a Test
How to complete the DOT Alcohol Testing Form correctly under 49 CFR Part 40, and which errors turn a valid result into a cancelled test.
5 min read Read →Hearing ConservationTemporary and Contract Workers: Who Owns Their Hearing Tests?
Whether the staffing agency or the host employer is responsible for OSHA hearing conservation testing on temporary and contract workers, and how to avoid gaps.
6 min read Read →OSHA ComplianceWorkforce Qualification Tracking: Why the Training Spreadsheet Fails the Audit
Why a spreadsheet-based employee training compliance tracking system breaks down under an OSHA audit, and what a defensible record actually needs.
5 min read Read →Breath Alcohol TestingInsufficient Breath on an Alcohol Test: What DOT Procedure Requires
What happens when a driver can't produce enough breath volume for a DOT alcohol test, how the medical evaluation referral works, and how it differs from a refusal.
5 min read Read →Breath Alcohol TestingChoosing a BAT Training Course: What DOT-Qualified Actually Requires
What a BAT training course must cover under 49 CFR Part 40 Subpart J to make a technician DOT-qualified, and how to evaluate a course before you buy it.
6 min read Read →Hearing ConservationScheduling a Mobile Hearing Test Day Across Three Shifts Without Losing Production
How to structure mobile audiometric testing across first, second, and third shift so every employee gets tested without a production slowdown.
5 min read Read →Breath Alcohol TestingEBT vs ASD: Which Alcohol Screening Devices DOT Accepts
DOT alcohol testing only allows devices on NHTSA's Conforming Products List. Here's how EBTs and ASDs differ, which one your program actually needs, and how to verify a device is approved.
5 min read Read →Breath Alcohol TestingDOT Alcohol Test Refusals: What Counts and What Happens Next
What legally counts as a DOT alcohol test refusal under 49 CFR Part 40, how it differs from a violation, and the immediate consequences for the employee.
5 min read Read →Breath Alcohol TestingPost-Accident Alcohol Testing: The 8-Hour Clock Under 49 CFR 40
DOT post-accident alcohol testing has an 8-hour deadline, not a 2-hour one — and that deadline behaves differently than most safety managers assume. Here's the actual rule.
5 min read Read →Calibration & InstrumentsCalibration Certificates: What a Defensible Cert Must Actually Contain
What belongs on an audiometer calibration certificate, why traceability and specific readings matter more than a pass/fail stamp, and how to spot a thin one.
5 min read Read →Breath Alcohol TestingZero Tolerance vs 0.02/0.04: What DOT Alcohol Test Results Actually Mean
DOT alcohol testing isn't zero tolerance the way most employers assume. Here's what 0.02 and 0.04 results actually trigger under 49 CFR Part 40.
5 min read Read →Breath Alcohol TestingDOT Random Alcohol Testing Rates: How Selection Pools Work
DOT random alcohol testing runs on an annual percentage rate, not a per-employee schedule. Here's how the selection pool, rate changes, and refusal consequences actually work.
6 min read Read →Spirometry & Fit TestingFit Test Recordkeeping: What 1910.134 Requires You to Retain
What OSHA's respiratory protection standard requires fit test records to contain, how long to keep them, and the documentation mistakes that surface during an inspection.
6 min read Read →Spirometry & Fit TestingPFT Results Explained: A Safety Manager's Guide to FVC, FEV1, and Ratios
How to read pulmonary function test results without a medical degree — what FVC, FEV1, and the FEV1/FVC ratio actually tell you about an employee's lung function.
6 min read Read →Spirometry & Fit TestingSpirometer Hygiene: Preventing Cross-Contamination Between Tests
Single-use filters, sensor cleaning, and disinfection protocols that keep occupational spirometry safe from one employee to the next.
5 min read Read →Spirometry & Fit TestingN95 Fit Testing for Healthcare: Qualitative Protocols That Scale
How healthcare facilities run qualitative N95 fit testing across large staff rosters without violating 1910.134 or blowing up the testing budget.
6 min read Read →Spirometry & Fit TestingAnnual Fit Test Requirements: What Triggers a Retest Early
OSHA requires a fit test at least annually, but five specific conditions require an earlier retest. Here's what triggers one and how to build them into your program.
5 min read Read →Spirometry & Fit TestingRespirator Medical Evaluation: 1910.134 Appendix C Questionnaire Explained
OSHA requires a medical evaluation before any employee wears a respirator. What Appendix C covers, who reviews it, and how the process ties into fit testing.
5 min read Read →Spirometry & Fit TestingAcceptable and Repeatable Spirometry Curves: ATS 2019 Criteria
How ATS/ERS 2019 grades spirometry acceptability and repeatability — start-of-test criteria, back-extrapolation, and what an A vs. D grade means.
5 min read Read →Hearing ConservationSmall Business Hearing Conservation: A Minimum Viable Compliant Program
What a small employer actually needs to run a compliant OSHA hearing conservation program under 1910.95, without the enterprise-scale overhead.
6 min read Read →Spirometry & Fit TestingNIOSH Spirometry Training: Does Your Technician Need It?
NIOSH-approved spirometry training explained: who needs it, what it covers, how long it lasts, and what happens if your program skips it.
5 min read Read →Spirometry & Fit TestingSpirometry in Silica-Exposed Workplaces: 1910.1053 Medical Surveillance
OSHA's respirable crystalline silica standard requires periodic spirometry for exposed workers. What triggers testing, what's measured, and how the surveillance schedule works.
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