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Well Number Seal at Grade Well Cap Additional <br /> MW-4 <br /> Y - <br /> 4. Calculate the casing volumes in each well using the following equation and record <br /> in Table 4: Casing Volumes, NOTE: Use the CDTW for MW-2. <br /> CV — 0. 16 al * (TD — DTW) t <br /> ft <br /> Table 4 : Casing Volumes <br /> Well Number TD - DTW CV <br /> MW- 1 <br /> MW-2 <br /> I <br /> MW-3 <br /> MW-4 <br /> 5. Purge the wells. <br /> NOTE: See section 1 for the purging of MW-2. <br /> a. Record the initial pH, temperature and conductivity of the well and <br /> record in Table 5 : Initial pH, Temperature and Conductivity. <br />`r Table 5 : Initial pH , Temperature and Conductivity <br /> 1 41 <br /> Well Number pH Temp . Cond . <br /> i <br /> MW4 <br /> i <br /> MW-2 <br /> MW-3 <br /> MW-4 <br /> b . Purge three (3) to (5) casing volumes as calculated in Table 4: Casing <br /> Volumes. <br /> c. Record intermediate pH, temperature and conductivity of the well in <br /> Table 6: Intermediate pH, Temperature and Conductivity <br /> Table 6 : Intermediate pH, Temperature and Conductivity <br /> Well Number Purge Vol . pH Temp . Cond . <br /> MW4 <br /> MW4 <br /> MW4 <br />� I <br /> MW-2 <br /> 3 <br />