With a growing emphasis being placed on the application of low-flow sampling techniques for groundwater sampling, groundwater sampling pump manufacturers have begun developing new instrumentation to meet the needs of the environmental professional. Low-flow sampling has become the standard for groundwater sampling. The major drawback to the older method of sampling was the draw down impact (stress) that was created and the large amount of waste water that had to be disposed of properly, adding additional expenses. Both of these issues are now addressed through the low-flow technique. Low-flow sampling allows the use of a number of different kinds pumps such as down hole electric pumps, bladder pumps and surface peristaltic pumps. These pumps can be adjusted through a control box to slow the purge rate to a minimum so as not to create draw down
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