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i <br /> -� Preparation of Location <br /> 1 Clear the area around the well of foreign matenals, such as brush, rocks, debns, <br /> ` etc <br /> 2 Remove all casing caps from the groundwater monitoring wells Allow the water <br /> levels to stabilize :. <br /> '-_ - Water Level Measurement <br /> y y - The first sampling operation will be water level measurement An electrical interface <br /> probe is used to measure the depth to groundwater below the datum to the nearest <br /> _ /c-inch(0 01 foot) <br /> 1 Using the oil/water interface probe, measure the depth to water (DTW) and total <br /> - - depth(TD) in each well <br /> - --; a Start with the least contaminated well (MW-3) <br /> b Measure the depths from the top of casing-JOC� <br /> c Decontaminate the probe after each well <br /> �. d Record the results in Table 2 Well Measurements <br /> ' - w e The depths should be recorded to the nearest 0 01 foot <br /> r 'table 2 Well Measurements <br /> Well Number DTW (ft } TO (ft <br /> _- MW-1J143 zy'o �� .5T <br /> ' r <br /> _ __ - _ MW-2 h� 3 <br /> MW-3 Z 1161 <br /> 9p <br /> MW-4 q 7j <br /> T f For MW-2, measure the free product thickness FPT: 2S' <br /> g Calculate the corrected depth to water using the following equation and <br /> record <br /> =` CDTW = DTW—(FPT*SG) <br /> ¢ where, CDTW=Corrected Depth to Water <br /> DTW=Original Depth to Water <br /> FPT=Free Product Thickness <br /> SG= Specific Gravity(Fuel Oil=0 82—0 95) <br /> CDTW. <br /> 34, to <br /> I 2 Note the condition of each well in Table 3 Well Condition <br /> F <br /> 4 <br />