The specifics of the question speak to the request that was made just to have situational awareness on the vehicles that were parked out front on Wellington.
The request for CBRNE sensing was made to the national division of the RCMP, not to Ottawa police officers. That's not their mandate.
Unfortunately, that was not fulfilled, simply because of the technology gap that the RCMP had in what would be required to be detected. It was considered to be unsafe for some of those members to walk through that street and sense vehicles.