The document discusses whether environmental parameter measurements are mandatory under the ISO 14001:2004 standard. While the standard does not explicitly require measurements, it can be interpreted that initial measurements should be taken to understand environmental aspects and impacts. Additionally, parameters should be continuously monitored to ensure they remain within acceptable limits over time, though the standard does not specify time intervals for repeating measurements. Guidance in an annex to the standard lists various environmental aspects that could be measured, including emissions, wastes, and other physical attributes.