Confused about stormwater sample holding times?
When it comes to taking stormwater samples used for testing, monitoring, or to be analyzed by a lab, many people out there aren't aware of the various instructions that must be followed. One of the most common rules that must be followed involves what are called "holding times" for stormwater samples. This concept trips a lot of people up. If you're unaware of what holding times are, trust me, you're not alone. Many people who have NPDES permits, or any other type of stormwater or process water discharge permit need to make sure they understand what holding times, otherwise they risk having invalid samples or running into trouble.