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4. If the electric cable is not graduated between foot markings, use a pocket <br /> steel tape measure (graduated in hundredths of a foot) to interpolate <br /> between consecutive marks. Care must be taken to ensure that the tape <br /> measurements are subtracted from the graduated mark footage value <br /> when the water level hold point (determined in Step 3) is below the <br /> graduated mark and added when it is above the mark. Record the <br /> resulting value as water level below MP on the WATER LEVEL <br /> MONITORING RECORD. <br /> 2 ? WELL DEPTH MEASUREMENTS <br /> T v depth of a well will be measured by sounding with a weighted steel surveying tape or an <br /> e : tric sounding line, weighted when possible. Procedures to be followed are described <br /> b ' )w. <br /> 1. Measure the distance between the zero mark on the end of the measuring line <br /> and the bottom of the weight. <br /> 2. Lower the weighted measuring line into the well until the line becomes slack or <br /> there is a noticeable decrease in weight, which indicates the line is-touching the <br /> bottom of the well. Raise the line slowly until it becomes taut (this may have to <br /> be done several times to determine the taut point) and, with the line in this fixed <br /> position, note the reading at the MP. Add the distance described in Step A to <br /> this reading, and record the resulting value as well depth. This procedure will <br /> be performed before and after initial well development or as necessary to <br /> determine well casing depth. <br /> 3. Record the well depth value on a WATER LEVEL MONITORING RECORD. <br /> 3.0 FLOATING PRODUCT MEASUREMENTS <br /> >ating product level/thickness will be measured using an interface probe or steel tape and <br /> ;te. The electric sounder and bailer method is limited to checking the wells for the presence <br /> I absence of floating product. Procedural details are provided below. <br /> floating product level measurements shall be recorded to the nearest hundredth foot (0.01 <br /> ). All equipment placed in the wells for floating product level measurement will be <br /> WATER LEVEL, WELL DEPTH, AND FREE FLOATING MEASUREMENTS Page 3 of 6 <br /> '3 <br /> .PROTO-WL.M REVISION DATE:MARCH 1996 WL <br />