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/An-= <br /> GEOMATRIX <br /> minutes apart have stabilized. If the well is currently pumping, the sample can be <br /> taken without purging the well. Water samples will then be collected from the <br /> discharge point nearest the well head. Samples will be collected directly into <br /> ' laboratory-prepared bottles. <br /> ' C. Extraction Wells <br /> Extraction wells will be sampled while extraction is occurring. Samples will be <br /> ' collected from an in-line sampling port after purging the sampling line. Samples <br /> will be collected directly into laboratory-prepared bottles. <br /> A WELL SAMPLING AND/OR DEVELOPMENT RECORD will be used to record the <br /> ' following information: <br /> ' • Sample I.D. <br /> • Duplicate I.D., if applicable <br /> ' • Date and time sampled <br /> • Name of sample collector <br /> ' • Well designation (State well numbering system for water supply wells, and <br /> unique sequential number for other wells) <br /> • Owner's name, or other common designation for water supply wells <br /> ' • Well diameter <br /> • Depth to water on day sampled <br /> • Casing volume on day sampled <br /> ' • Method of purging (bailing, pumping, etc.) <br /> • Amount of water purged <br /> • Extraordinary circumstances (if any) <br /> • Results of instrument calibration/standardization and field measurements <br /> (temperature, pH, specific electrical conductance) and observed relative <br /> turbidity <br /> ' • Depth from which sample was obtained <br /> • Number and type of sample container(s) <br /> ' • Purging pump intake depth <br /> • Times and volumes corresponding to water quality measurement <br /> • Purge rate <br /> ' SAMPLING OF GROUNDWATER 'MONITORING WELLS <br /> ' .AND WATER SUPPLY WELLS Pa_e 4 of 10 <br /> MSCPROTO-M W.TNT REVISION DATE MARCH 1906 V[W_4 <br />