Indicator site Stream sampling sites located at or near outlets of drainage basins with near homogeneous land use and physiographic conditions. Integrator site Stream sampling sites located in drainage basins that are large and complex and often contain multiple environmental settings. Intensive fixed sites Basic fixed sites with increased sampling frequency, during selected seasonal periods and analysis of pesticides for a period of about one year. One thousand micrograms per liter is equivalent to one milligram per liter. The Environmental Protection Agency assigns and approves all requests for new codes.
Pesticides are chemical compounds used to control undesirable plants and animals.
Major categories of pesticides include insecticides, miticides, fungicides, herbicides, and rodenticides. Specific conductance is a measure of the ability of a water solution to conduct an electrical current. This relation is not constant from stream to stream, and it may vary in the same stream with changes in the composition of the water. When measuring fish, standard length is the length from the tip of the upper jaw to posterior end of the fleshy peduncle. Streamflow is the discharge that occurs in a natural channel.