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0 <br />6.3 Sparge Test <br />After completion of the vent test, the sparge test will be <br />conducted for approximately 24 hours. <br />The initial air injection pressure will adjusted to <br />approximately 1.5 times the calculated breakout pressure, or no <br />more than 10 standard cubic feet per minute (scfm). <br />The breakout pressure is the pressure required to displace the <br />water column from the well casing and is calculated by measuring <br />the groundwater level and total depth in the well and dividing the <br />water column thickness in feet by 2.31. <br />After eight hours, or when stabilization in the parameters <br />monitored occurs, the pressure will be increased to approximately <br />2 times the breakout pressure, or no more than 15 scfm. After an <br />additional eight hours, or stabilization in the parameters <br />monitored, the pressure will be increased to approximately 3 times <br />the breakout pressure, or no more than 20 scfm. <br />Do measurements, water levels, and pressure measurements will <br />be recorded at wells MW -1, MW -2, MW -5, MW -7, PZ -1, and PZ -2, at the <br />times indicated in Table 1. Water levels will also be measured in <br />wells MW -6 and MW -10 to evaluate regional water level fluctuations <br />during the test. <br />The radius of influence will be identified by increased DO <br />concentrations and higher observed water levels in the monitored <br />wells. If DO is higher than the baseline measurement, and/or the <br />water level has increased more than the changes measured in wells <br />MW -6 and MW -10, the monitoring point can be considered to be within <br />the radius of influence of the sparge well. <br />6.4 VentlSparcte Test <br />After approximately 24 hours of sparging, the combination vent <br />sparge test will be started. The sparging pressure and flow <br />identified as creating the greatest radius of influence during the <br />07/94/1213821125997/REM REP/1 <br />July 1, 1994 9 26am <br />