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<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />or less pervious zones. Slurry plug surfaces were monitored by <br />measuring the rise of standing water in the hole and probing the <br />slurry surface. Standing water reached the surface after the <br />installation of piezometer No. 103. Water was removed from the <br />hole with the bailing tool in order to continue. During this <br />bailing operation the tool was lost down the hole and could not be <br />retrieved. The tool was left in place (at a depth of 27.1-feet) <br />and slurry was injected to the 18-foot depth where piezometer 102 <br />was installed. As a piezometer tip was scheduled to be installed <br />where the bailing tool was lost and sealed, another hole was <br />required in order to measure this sealed or by-passed zone. Since <br />another hole was required it was decided to alternate the <br />installation of the last three piezometers. Thus, one of the last <br />three piezometers (No. 102) was installed in hole No. 4 and the <br />other two were installed in hole No. 5. Once the piezometers were <br />all in place they were probed to verify that they had remained open <br />during the installation. The results of initial measurements <br />indicated that the wells were open and also verified that pervious <br />zones had been intercepted as different water levels were initially <br />measured in each of the wells. <br />DRILL HOLE No. 5: <br />Drill hole No. 5 was located approximately 3-feet south of <br />hole No. 4. This hole was advanced to a depth of 25-feet on March <br />22, 1994. The necessity of this hole was explained in the previous <br />paragraph. The identified target or wet zones were intercepted <br />with this hole and the final two, 100 series piezometers were <br />installed, after flushing the hole, as follows: <br />PZ Tip Slot Sand Pack (ft) Slurry Plug (ft) <br />ID Depth Length From To From To <br /> (ft) (ft) <br />101 24.5 2.0 25.0 21.0 21.0 12.0 <br />100 11.5 3.0 12.0 6.0 6.0 0.0 <br />After installation, the piezometers were probed and appeared <br />to be functioning properly. Graphic details of the 100 series <br />piezometer installations are presented on Plate 26 of the Appendi:t. <br />DRILL Y.OLE No. 6: <br />Drill hole No. 6 was located approximately 30-feet north of <br />existing piezometer well B1-1 an the inside of the first <br />maintenance bench. Hole Plo. 6 was advanced to a depth of 60-feet <br />on March 23, 1994. The alluvium/pile contact was encountered at <br />44-feet. A total of five water bearing or wet zones were <br />identified during the drilling operation. These pervious zones <br />were separated by dry or less pervious intervals. As before the <br />alluvium/pile contact and the alluvial foundation were also <br />targeted for piezometer installations. On March 24, 1994 the hole <br />10 <br />