[Home] [Master Table of Contents]
June 2004 Off-Post Quarterly Groundwater Monitoring Report
Appendix D - In-Situ Low Flow Logs
Off-Post Low Flow Set Up
At off-post privately owned wells a faucet splitter is used to allow the pump to purge a large volume of water while collecting field parameters from the purged water. One side of the splitter is placed at a manageable volume for the Troll 9000 to record the parameters. The other side of the splitter is left at a full flow rate to allow water purging.
The attached logs include data collected by the Troll 9000. Each log includes Project Information, Pump Information, Well Information, and Pumping Volume Information. Most of the data required to populate these fields are not available from the owners of the wells. Stabilization settings were left at zero because every well will stabilize at different levels. The low-flow stabilization summary shows the last five measurements collected before the sample is collected. As the measurements stabilize to within 10% of the previous reading, the well has is properly purged and a formation water is being pumped to surface. At that time the sample can be collected.