Cal/OSHA Hearing Conservation: Complete Employer Guide (CCR Title 8)

California employers are not governed by federal OSHA 1910.95 for hearing conservation — they are governed by Cal/OSHA, and the two standards are not identical. California Code of Regulations (CCR) Title 8, Article 105 contains the state’s complete noise and hearing conservation requirements, including a mandatory regulation posting obligation that has no federal equivalent and that is one of the most commonly overlooked compliance requirements in the state. This guide covers every element of the Cal/OSHA standard.

Soundtrace supports Cal/OSHA-compliant hearing conservation programs across California, with documentation designed to satisfy CCR Title 8 Article 105 requirements including the posting obligation.

Governing Authority: Cal/OSHA, Not Federal OSHA

California operates an OSHA-approved State Plan under Section 18 of the OSH Act. This means the California Division of Occupational Safety and Health (Cal/OSHA), a division of the California Department of Industrial Relations, has primary enforcement jurisdiction over workplace safety and health for private-sector employers in California — including hearing conservation. Federal OSHA 29 CFR 1910.95 does not directly govern California private-sector employers.

The California noise and hearing conservation standard is codified at California Code of Regulations (CCR) Title 8, Article 105, Sections 5096 through 5100:

• CCR Title 8 § 5096 — Exposure Limits for Noise
• CCR Title 8 § 5097 — Hearing Conservation Program
• CCR Title 8 § 5098 — Hearing Protectors
• CCR Title 8 § 5099 — Audiometric Testing Program
• CCR Title 8 § 5100 — Recordkeeping

Scope and Exemptions

The Cal/OSHA hearing conservation program requirements of § 5097 apply whenever any employee’s noise exposure equals or exceeds an 8-hour TWA of 85 dBA. This is the same action level as federal OSHA.

Three industry sectors are explicitly exempt from the hearing conservation program requirements of § 5097: agriculture, construction, and oil and gas well drilling. These industries have separate noise-related obligations under other Cal/OSHA standards. All other California general industry employers above the 85 dBA action level must maintain a full hearing conservation program under §§ 5096–5100.

▶ Bottom line: If you operate a California manufacturing, warehousing, food processing, metal fabrication, or other general industry facility with noise exposures at or above 85 dBA TWA, the full Cal/OSHA hearing conservation program requirements apply to your operation.

Noise Exposure Limits: CCR Title 8 § 5096

Section 5096 establishes California’s permissible noise exposure limits (PEL). The PEL is an 8-hour TWA of 90 dBA — the same as federal OSHA. The action level triggering hearing conservation program requirements is 85 dBA TWA — also the same as federal OSHA.

Exposure to impulsive or impact noise must not exceed 140 dB peak sound pressure level. When daily noise exposure is composed of two or more periods at different levels, their combined effect must be considered using the dose fraction method (C1/T1 + C2/T2 ≥ 1). The complete permissible noise exposure table is published at CCR Title 8 § 5096, Table N-1.

Hearing Conservation Program: CCR Title 8 § 5097

Section 5097 is the heart of the Cal/OSHA hearing conservation standard. It requires employers to establish and maintain a hearing conservation program whenever any employee’s noise exposure equals or exceeds the 85 dBA action level. The program must include all of the following elements.

Noise monitoring

When information indicates that any employee’s exposure may equal or exceed 85 dBA TWA, the employer must obtain measurements for those employees. All continuous, intermittent, and impulsive sound levels from 80 to 130 dBA must be integrated into measurements. Monitoring must be repeated whenever a change in production, process, equipment, or controls may increase exposures or render existing HPDs inadequate.

Affected employees or their representatives must be given the opportunity to observe any noise monitoring measurements.

Audiometric testing program

The employer must establish and maintain an audiometric testing program as specified in § 5099. All audiometric testing must be provided at no cost to employees.

Hearing protection devices

The employer must make hearing protectors available at no cost to all employees exposed at or above 85 dBA TWA. Employees who have experienced a documented STS, or who have not yet obtained a baseline audiogram, and are exposed at or above 85 dBA must wear hearing protectors. HPD requirements are detailed in § 5098.

Training program

Annual training is required for all employees enrolled in the hearing conservation program. Training must cover the effects of noise on hearing, the purpose of hearing protectors, the advantages and disadvantages of different types, proper selection, fitting, use, and care of HPDs, and the purpose of audiometric testing and employee rights regarding audiograms.

Recordkeeping

Records requirements are specified in § 5100 and are detailed below.

The posting requirement — the most commonly missed element

Compliance is straightforward: print a copy of CCR Title 8 §§ 5096–5100 from the Cal/OSHA website and post it in a location accessible to noise-exposed employees. Keep a copy available for employee inspection.

Hearing Protectors: CCR Title 8 § 5098

Cal/OSHA’s hearing protector requirements under § 5098 mirror the structure of federal 1910.95 but include a specific NRR derating methodology. Key requirements:

• Hearing protectors must attenuate employee exposure to at least a 90 dBA TWA (the PEL) for employees required to wear them under § 5096(b)
• For employees who have experienced an STS, protectors must attenuate exposure to 85 dBA or below
• Employers must evaluate HPD attenuation using one of the methods described in Appendix E
• Employees must be given the opportunity to select from a variety of suitable hearing protectors
• Initial fitting and supervision of correct use must be provided

NRR derating under Cal/OSHA Appendix E

When using an A-weighted noise dosimeter to estimate employee noise exposure (the most common method), 7 dB must be subtracted from the manufacturer’s labeled NRR before estimating real-world attenuation. This derating factor is specified in Cal/OSHA Appendix E to § 5097/5098 and reflects the recognized gap between laboratory NRR ratings and real-world performance.

▶ Bottom line: An earplug with an NRR of 33 provides an estimated 13 dB of usable attenuation under the Cal/OSHA A-weighted method (33 − 7 = 26, then divided by 2 = 13 dB). This is the same result federal OSHA’s Appendix B recommends, but Cal/OSHA states it explicitly in the regulation.

Audiometric Testing: CCR Title 8 § 5099

Section 5099 specifies Cal/OSHA’s audiometric testing requirements. These are substantively the same as federal 1910.95 but enforced under the state standard:

When an STS is identified, unless a physician or audiologist determines the shift is not work-related, the employer must: refit and retrain the employee on HPD use and care; require HPD use if not already required; and refer the employee to a physician or audiologist if the STS persists on retest.

Recordkeeping: CCR Title 8 § 5100

Section 5100 specifies Cal/OSHA’s recordkeeping requirements for hearing conservation programs. Records must be maintained and made available to employees and Cal/OSHA upon request.

Additionally, when a Cal/OSHA Form 300 recordable STS occurs (shift of 25 dB or more above audiometric zero average at 2000, 3000, and 4000 Hz that is work-related), the case must be recorded on the Cal/OSHA 300 Log under CCR Title 8 § 14300.10.

Cal/OSHA vs. Federal OSHA 1910.95: Side-by-Side

▶ Bottom line: For California employers, the substantive hearing conservation requirements are nearly identical to federal OSHA. The critical differences are the posting requirement (§ 5097(l)) and the fact that enforcement runs through Cal/OSHA with its own citation and penalty framework.

Cal/OSHA Enforcement

Cal/OSHA conducts its own inspection program independent of federal OSHA. Inspections may be programmed (targeting high-hazard industries including those with high noise exposure), complaint-driven, referral-based, or fatality/catastrophe response. Cal/OSHA inspectors cite violations under the state standard — not federal 1910.95 — and apply California’s own civil penalty structure.

Cal/OSHA penalty amounts differ from federal OSHA’s and are subject to their own adjustment schedules. For current penalty information, refer to Cal/OSHA’s enforcement page. Employers in California can also request a free, confidential consultation through the Cal/OSHA Consultation Service, which operates separately from enforcement.

▶ Bottom line: A Cal/OSHA consultation is the best proactive step California employers can take. The service is free, confidential, and cannot result in citations. Request one before your first inspection.

Frequently asked questions