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SOP: Monitoring <br />Well Development <br />6. Lower a surge block or bailer into the screened portion of the well. Gently raise and lower the surge block or <br />bailer within the screened interval of the well to force water in and out of the screen slots and sand pack. <br />Continue surging for 15 to 30 minutes. Note that this step is optional but recommended for all new <br />wells/piezometers, particulazly in formations with a relatively high content offine-grained material. <br />7. Lower abottom-loading bailer to the bottom of the well and gently bounce the bailer on the bottom of the <br />well to collect accumulated sediment, if any. Remove and empty the bailer. Repeat until the bailed water is <br />free of excessive sediment and the bottom of the well feels solid. <br />8. After surging the well and removing excess accumulated sediment from the bottom of the well, re-measure <br />the depth-to-water and the total well depth from the reference point at the top of the well casing. <br />' 9. Remove formation water by pumping or bailing. Where pumping is used, measure and record the pre- <br />pumping water level. Operate the pump at a relatively constant rate. Measure the pumping rate using a <br />calibrated container and stop watch. Measure and record the water level in the well at least once every 5 <br />' minutes during pumping. Note any relevant observations in terms of water color, visual level of turbidity, <br />sheen, odors, etc. Pump or bail for 30 to 60 minutes or until termination criteria specified in the Work Plan <br />or Field Sampling Plan (FSP) are reached. Record the total volume of water purged from the well. <br />10. If the well goes dry, stop pumping or bailing and allow well to recover. Resume pumping or bailing when <br />sufficient water has rechazged the well. <br />11. Contain all water in appropriate containers. <br />12. When complete, secure the lid back on the well. <br />13. Place disposable materials in plastic bags for appropriate disposal and decontaminate reusable, downhole <br />pump components and/or bailer. <br />VII. Waste Management <br />Development water and disposable materials (tubing, PPE, etc.), will be managed as specified in the Work Plan. <br />VIII. Data Recording and Management <br />Well development activities will be documented in a field logbook. Pertinent information will include personnel <br />present on site; times of arrival and departure; significant weather conditions; timing of well development <br />activities; development method(s); observations of purge water color, turbidity, odor, sheen, etc.; purge rate; and <br />water levels before and during pumping. <br />IX. Quality Assurance <br />All reused, non-disposable, downhole well development equipment will be cleaned in accordance with the <br />procedures outlined in the Field Equipment Cleaning-Decontamination SOP. <br />X. References <br />Not Applicable. <br />iiroroe <br />SOFGShconitor Well Development-Mine.EOc <br />