Laserfiche WebLink
• • <br /> 2.1 WATER LEVEL MEASURENIENTS <br /> Water level measurements will be performed by one of the following methods: <br /> A. Wetted-Tape Method <br /> A steel surveyor's tape will be prepared by coating several feet of the lower end <br /> of the tape with chalk or water-finding paste. A weight is attached to the lower <br /> end of the steel tape to keep it taut. The tape is lowered into the well until a <br /> foot or two of the chalked portion is submerged. <br /> A tape without weight can be used if the well opening or pump casing clearance <br /> is too small and restricts the passage of the weight. The proper length to lower <br /> the tape may have to be determined experimentally. Measurement will be done <br /> as follows: <br /> 1. Lower and hold the tape at an even foot mark at the measuring point <br /> (MP) and note this tape reading. <br /> 2. Remove the steel tape from the well. Add or subtract the wetted length <br /> from the even foot mark noted in Step 1, as appropriate for your tape, <br /> and record this as water level below MP on the WATER LEVEL <br /> MONITORING RECORD. <br /> B. Electric Sounder Method <br /> An electric sounder consists of a contact electrode suspended by an insulated <br /> electric cable from a reel that has an ammeter, a buzzer, a light, or other closed <br /> circuit indicator attached. The indicator shows a closed circuit and flow of <br /> current when the electrode touches the water surface. Electric sounders will be <br /> calibrated periodically by measuring each interval and remarking them where <br /> necessary. <br /> The procedure for measuring water levels with an electric sounder is as follows: <br /> 1. Turn sounder on, and check that it is working. <br /> 2. Lower the electric sounder cable into the well until the ammeter or <br /> buzzer indicates a closed circuit. Raise and lower the electric cable <br /> slightly until the shortest length of cable that gives the maximum <br /> response on the indicator is found. <br /> 3. With the cable in this fixed position, note the length of cable at the MP. <br /> WATER LEVEL, WELL DEPTH, AN]) FREE FLOATING MEASUREMENTS Page 2 of 6 <br /> MSCIPROTO-WL.TXT REVISION DATE:MARCH 1996 WL-2 <br />