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After temperature, pH, and conductivity stabilized, another run was made for final field and lab
<br />samples. Usually the most representative sample is selected (after purging) in the middle of the
<br />run, and this mid-point sample is in bold below:
<br /> ~
<br />9.0 2,210 18.1
<br />9.1 2,100 15.9
<br />9.1 2,180 15.1
<br />9.1 2,160 14.5
<br />9.2 2,190 14.2
<br />9.2 2,250 14.3
<br />It is interesting that the first run contained higher conductivity than subsequent runs, but purging
<br />was adequate to remove existing casing water below the bentonite seal, therefore the final
<br />sample is typical of water in the lower open zone of the well. Expected conductivity of > 10,000
<br />may slowly develop over time.
<br />Data is shown as pH/conductivity (umhos/cm) /temp °C
<br /> MWD1-9/26/00
<br />8.6 / 38,400 / 16.1 MWDl-9/27/00
<br />8.9 / 40,100 / 16.1
<br />8.6 / 61,400 / 17.7
<br /> 8.6 / 39,100 / 15.8 8.7 / 40,500 / 14.8 8.6 / 58,500 / 15.8
<br /> 8.5 / 38,800 / 14.8 8.7 / 40,600 / 14.3 8.7 / 58,900 / 14.7
<br /> 8.4 / 39,400 / 14.7 8.3 / 56,300 / 14.2 8.7 ! 59,800 (14.5
<br /> 8.4 / 39,300 / 14.4 8.2 / 58,700 / 14.2 8.4 / 52,900 / 15.3
<br /> 8.4 / 39,800 / 14.6 8.2 / 60,400 / 14.4 8.3 / 49,800 / 14.8
<br /> 8.3 (39,900 / 14.4 8.2 (60,6001 14.4 8.2 f 47,800 / 14.5
<br /> 8.3 / 40,000 / 14.6 8.3 / 60,600 / 14.6 8.2 / 45,800 / 14.4
<br /> 8.3 / 40,300 / 14.2 8.2 / 60,200 / 14.3 8.1 / 45,200 / 14.2
<br /> 8.3 ! 40,7001 14.2 8.2160,2001 14.0 8.2144,5001 14.3
<br /> 8.3 / 40,400 / 14.2 8.2 / 60,500 / 14.0 8.2 / 43,500 / 14.3
<br /> 8.3 / 40,500 / 14.2 8.2 / 60,200 / 13.9
<br /> 8.3 / 40,500 / 14.2 8.2 / 59,700 / 13.8
<br /> 8.2 / 40,800 / 14.2 8.2 / 59,500 / 13.7
<br /> 8.2 / 40,300 / 14.1 8.2 / 59,700 / 13.6
<br /> 8.2 / 40,700 / 13.9 8.2 / 60,100 / 13.6
<br /> 8.2 / 41,800 / 14.3 8.2 / 60,200 / 13.5
<br /> 8.2 / 51,400 / 14.2 8.2 / 60,800 / 13.6
<br /> 8.2/57,100/14.3
<br /> 8.2 / 58,400 / 14.1
<br /> 8.2 / 47,100 ! 14.0
<br /> 8.3 / 42,700 / 14.4
<br />During the third run, it was obvious that conductivity was >40,000, and pH was in the low 8s,
<br />typical of the Dissolution Surface aquifer.
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