Archive
July 2026
19 guides published this month.
What Is a Standard Threshold Shift? STS Math, Explained
How OSHA's standard threshold shift is calculated, with worked examples, age correction, and why the 10 dB average trips a retest.
4 min read Read →Breath Alcohol TestingWhat Is a Breath Alcohol Technician? BAT Certification Explained
What a Breath Alcohol Technician does under 49 CFR §40.213, how BAT training and qualification work, and how a BAT differs from a DOT-certified role.
5 min read Read →OSHA ComplianceOSHA Recordkeeping: When an STS Becomes a 300 Log Entry
How a standard threshold shift becomes a recordable OSHA 300 Log case under 29 CFR 1904.10, including age correction and deadlines.
5 min read Read →Spirometry & Fit TestingSpirometer Calibration: Syringe Checks & ATS/ERS Accuracy
How spirometer calibration syringe checks work, how often they're needed, and what accuracy tolerance ATS/ERS standards require.
4 min read Read →Spirometry & Fit TestingRespirator Fit Testing: Qualitative vs Quantitative Methods
The difference between qualitative and quantitative respirator fit testing under 29 CFR 1910.134 Appendix A, and which method applies when.
5 min read Read →Hearing ConservationOn-Site vs Clinic Hearing Testing: OSHA Program Comparison
How on-site and clinic-based audiometric testing compare for OSHA hearing conservation programs — cost, coverage, and scheduling tradeoffs.
5 min read Read →Calibration & InstrumentsIntoxilyzer Calibration & Accuracy Checks: What Employers Should Know
What happens during Intoxilyzer calibration and accuracy checks, how often DOT programs need them, and who can perform the service.
5 min read Read →Calibration & InstrumentsHow Often Must an Audiometer Be Calibrated?
Daily functional checks, annual acoustic calibration, and exhaustive calibration — what OSHA and ANSI S3.6 actually require for audiometers.
5 min read Read →Breath Alcohol TestingDOT Alcohol Testing: Screening vs Confirmation Tests
How DOT breath alcohol screening and confirmation tests differ under 49 CFR Part 40, what triggers a confirmation test, and what results mean.
5 min read Read →OSHA ComplianceBuilding a DOT Workplace Alcohol Testing Program From Scratch
The building blocks of a DOT-compliant workplace alcohol testing program under 49 CFR Part 40 — pool, policy, BAT staffing, and testing site.
5 min read Read →Hearing ConservationBaseline Audiogram Rules: Deadlines and Exceptions Explained
The 6-month baseline audiogram deadline, the 14-hour quiet period, and the mobile-van exception under 29 CFR 1910.95, explained plainly.
5 min read Read →Hearing Conservation15 Signs Your Company Needs Improved Hearing Testing Protocols
Learn the key warning signs that indicate your company's hearing testing protocols need improvement, from compliance gaps to rising workplace noise complaints.
6 min read Read →OSHA ComplianceSimplifying OSHA Training for a Safer Workplace in Cincinnati
Learn how OSHA training helps create safer workplaces in Cincinnati and what employers need to know about compliance requirements and employee safety standards.
4 min read Read →OSHA ComplianceUnderstanding OSHA Compliance: A Friendly Guide for Businesses
Learn what OSHA compliance means for your business and how to meet workplace safety requirements to protect your employees and avoid penalties.
5 min read Read →Spirometry & Fit TestingCommon Mistakes When Using Fit Testing Supplies and How to Avoid Them
Learn about the most common mistakes people make when using fit testing supplies and practical tips to avoid them for accurate, reliable results.
5 min read Read →Hearing ConservationOSHA Hearing Conservation: the 1910.95 Compliance Checklist
What 29 CFR 1910.95 actually requires — monitoring, baseline and annual audiograms, standard threshold shift handling, training, and recordkeeping — in one practical checklist.
7 min read Read →Spirometry & Fit TestingOccupational Spirometry: Keeping Your PFT Results Defensible
Calibration verification, technician training, single-use consumables, and test quality — the practices that make workplace spirometry stand up to scrutiny.
5 min read Read →Breath Alcohol TestingDOT Breath Alcohol Testing: What a Compliant Program Needs
Qualified BATs, an evidential breath tester on the conforming products list, calibration checks with dry-gas standards, correct forms, and the 15-minute confirmation rule — the moving parts of 49 CFR Part 40 alcohol testing.
6 min read Read →Calibration & InstrumentsAudiometer Calibration: What OSHA and ANSI Actually Require
Annual acoustic calibration, functional checks, ANSI S3.6, and booth requirements under ANSI S3.1 — what keeps your audiograms defensible and your program out of trouble.
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