ARCHIVED REPORTS_XR0007113 - Laserfiche WebLink

Home Browse Search

• augers from the surface The casing was continually vibrated during sand placement, and fill was checked with a weighted tape . As the sand filled the annulus, auger flights were slowly withdrawn. A total of 6 1/2 sacks of sand was used, the top was located at 281 , 2 feet above the top of the screened portion A bucket of bentonite pellets was poured down the annulus on top of the sand, it was wetted with a bucket of water The top of the bentonite seal was located at 251611 , 2 1/21 above the sand pack The remaining auger flights were withdrawn from the hole, they were covered with sticky, blue-grey clay The top of the hole was covered with a metal drum pending grouting of all three wells . Refer to PLATE XI for completion details . While the auger flights and other equipment were being steam- cleaned, the rig was mobilized on the location marked for monitoring well #3 , (refer to PLATE VI for it ' s location. ) Drilling began at 1.430 hours, surface sediments consisted of tan clay, fairly dry & not plastic Due to surface irregularities, core depths are recorded one (1) foot high The first core was taken from 4 ' -51 ; due to extremely hard drilling, the core barrel could not be advanced deeper. Recovery was 611 of tan to light • brown silty clay, dry & crumbly The sleeve was sealed, labeled and preserved using WJH field protocol described earlier Cores were taken at five (5) foot intervals from 9 ' to 35 ' 61, using standard WJH field procedures The first evidence of contamination was noted in the cored interval 241 -25161, (odor, ) but no reading was noted on a portion of the core screened with the PID meter The core from 291 -301611 consisted of 1811 of wet, sticky, brown clay with a definite petroleum odor A portion of the core screened with the PID meter recorded 102 ppm The last core, from 341 -35 ' 611 , also had a petroleum odor, and apparent discoloration was noted The PID meter recorded 24 ppm from a portion of the core placed in a plastic bag Refer to PLATE IX for details of blow counts, core recovery, & lithology The augers were advanced to 501 below grade for completing as a monitoring well . When retrieved from the hole, the bottom 151 of the augers were covered with wet, sticky blue-gray clay, which had a slight petroleum odor . 211 Schedule 40 , blank & slotted flush screw-point PVC was run in the flights to 501 , the bottom 201 consisted of horizontal . 02011 machine cut slots with a solid screw on plug on the bottom The top of the screen was at 301 , approximately 71 above the water table. From 301 to the surface was blank ##3 Lonstar graded sand was poured down the annular space between the casing and the • augers from the surface The casing was continually vibrated 7