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Sampling a Snowmelt Event
If a facility is located in an area that is covered by a standing snow pack for days at a time during a year of normal precipitation, the operator may alternatively sample a snowmelt event during the winter or spring quarter. The recommended sampling conditions for a snowmelt event are as follows:
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It is preceded by at least 24 hours of no greater than trace precipitation
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The snowmelt is generated by a rainfall or warm weather melt-producing event on a standing snow pack of at least one inch in depth
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The sample is collected during the first hour of discharge from your facility that was produced by the melting snow. Keeping up with the weather forecast and planning so that sampling can be carried out on short notice are the keys to successful sampling
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Copyright @ January,2005 Prepared by Transportation Environmental Resource Center (TERC)