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View postings from the STAO Blog.

Safety Q and A: Radioactivity

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I am concerned about the proposed inclusion of a lab investigation in the new SPH4U course involving the study of radioactive half life, using Cesium-137 as a source. Are there provincial regulations about the use of radioisotopes in high school science labs? If not,... read more

Safety Q and A: Lab Ventilation

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The Occupational Health and Safety Act (Reg.851 Section 127) requires that facilities ‘shall be adequately ventilated by either natural or mechanical means such that the atmosphere does not endanger the health and safety of workers.’ What constitutes... read more

Safety Q & A: Methylene Blue

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What level of exposure to methylene blue is harmful to students/teachers with G6PD deficiency? I’ve used this substance as a biological stain for more than twenty five years, but it wasn’t until this September, when a colleague had a student with this... read more

Safety Q and A: Bunsen Burners Clamping

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Bunsen burners are used extensively as a heat source in school laboratories. The Fire Code (Section 2.4.4.4) states that: ‘Devices having open flames shall be securely supported by incombustible holders and located or protected so as to prevent accidental... read more

Safety Q and A: Circuit Boards

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One of our science teachers visited the STAO Conference in the fall and brought back an exercise on extracting a circuit from a disposable camera. He is keen for all of the grade 9 science students to complete the lab. However, several of the science teachers have... read more
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