How are runoff samples collected?
Samples were collected by two different methods: automated sampling equipment and manual. Automated sampling equipment is set up to collect water at specific intervals throughout the flow. Automated samplers are used to ensure that the water from the entire flow event is collected. Because many of the storm events are short-lived, the automated equipment provides the only means of sampling the runoff at remote sites. Manual sampling is done by a sampling crew that dips a sample bottle into the flow and fills it with the stormwater to collect the sample. Manual samples are collected as a back up to the automated sampler.
