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are generally contained in a weighted probe that keeps the tape taut while providing some shielding of the <br />electrodes against false indications as the probe is being lowered into the hole. The electric tapes <br />generally are marked at 0.01-foot intervals. <br />Before lowering the probe in the well, the circuitry can be checked by dipping the probe in water and <br />observing the indicator. The probe should be lowered slowly into the well until contact with the water <br />surface is indicated. The electric tape is held at the measuring point and partly withdrawn; the band <br />reading at the point held is recorded to provide the depth to water below the measuring point. It is good <br />practice to take a second or third check reading before withdrawing the electric tape from the well. <br />The tape should not rub across the top of the casing because the measurement tape can become damaged. <br />In the event that a pressure transducer and automatic data logger is used, a manual water level <br />measurement should be performed when the transducer is installed in the well and again when the well is <br />accessed to download the data. <br />END OF APPENDIX B <br />O / 11-4V 152/00-05 B-2 Final APPend_B_WL_Meas.doc <br />