Occupational Hygiene

LEHDER has established the best processes, tools and resources to help clients anticipate, recognize, evaluate and control workplace hazards or stresses which may otherwise lead to illness or discomfort.


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Industrial Hygiene

Industrial Hygiene

Industrial Hygiene

Industrial Hygiene is an important tool in the management of workplace exposures, whether on the plant floor or the construction site. LEHDER can help ensure that worker exposure does not exceed regulated exposure limits.

Noise and Hearing Loss

Noise and Hearing Loss

Noise and Hearing Loss

Noise is everywhere. Damaged hearing can affect an individual’s health, well-being and job performance. LEHDER can help you comply with Ontario Regulation 851- Industrial Establishments, the regulation for controlling and warning where noise exposure exceeds 85dBA.

Designated Substance Surveys

Designated Substance Surveys

Designated Substance Surveys

Under Ontario Regulation 490/09, the employer is required to conduct an assessment for each designated substance in the workplace. These 11 substances of concern include asbestos, arsenic, mercury, silica, lead, vinyl chloride, ethylene oxide, benzene, acrylonitrile, isocyanates and coke oven emissions.

Support for Turnaround/Shut-Down Projects

Support for Turnaround/Shut-Down Projects

Support for Turnaround/Shut-Down Projects

LEHDER can offset the additional workload which occurs during turnaround projects for on-site company Industrial/Occupational Hygiene personnel by providing coverage on a 24 hour / 7 days a week basis during the length of the shut-down.

Indoor Air Quality

Indoor Air Quality

Indoor Air Quality

Indoor air quality is an important issue, whether addressing employee concerns and complaints in the workplace or gaining LEED certification for new or renovated buildings. Poor indoor air quality may affect employee health, leading to financial losses, regulatory orders and fines, or even criminal prosecutions.

Mould Investigations

Mould Investigations

Mould Investigations

LEHDER can help industrial clients and building owners with potential mould problems. This can easily be addressed with our investigative services to ensure your workplace is safe from mould-related illness and adverse health effects.