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Proper sample preservation in temporary or remote applications is very difficult to achieve without incurring costs to wire in AC power or to visit the sites frequently. Many watershed assessment projects are prolonged or compromised because samples are not preserved properly. Improperly preserved samples should be discarded, but may also end up in the lab resulting in either wasted analytical time and cost, or faulty data.

This paper describes the use of transportable refrigerated samplers to accurately preserve water and wastewater samples without the need of ice. The transportable refrigerated sampler is designed to be easily moved from vehicle to site and from site to vehicle, and to efficiently collect and cool samples. It can be powered by AC power, a deep cycle marine battery, or a solar panel.

Typical applications for transportable refrigerated samplers include stormwater monitoring, TMDL (Total Maximum Daily Load) studies, field run-off studies, surface water monitoring, and industrial pretreatment monitoring.