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Recommendations for Safe Re-occupancy of Marijuana Grow Operations

The following guide offers a practical approach to achieving safe re-occupancy of former marijuana grow operations (MGOs) and reviews possible exposures/hazards (tables 1 and 2). It is essential to make a clear distinction between risks associated with an “active” MGO and risks associated with a “shut down” MGO. An “active” MGO is linked to criminal activity, which in itself poses safety risks,...

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Carbon Dioxide in Indoor Air

A Public Health Inspector calls about an issue flagged at an older elementary school.  As part of a teacher complaint process, the provincial health and safety agency has been conducting a workplace investigation.  Carbon dioxide (CO2) levels were measured and ranged from 412 ppm in an unoccupied classroom to 1,130 ppm in the school library and 1,660 ppm in an occupied classroom that had closed...

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Pepper Spray in the Indoor Environment and in the Vicinity of Food Products and Preparation Surfaces

Pepper spray is discharged during an attempted robbery of a jewellery store in a large urban mall.  The robbery site is located next to the mall’s food court.  For several days, mall patrons continue to report uncomfortable symptoms (e.g., burning sensation in their eyes and throat) when they enter the food court.  Public Health Inspectors (PHIs) are asked to respond to concerns about...

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