COMPLIANCE INFO_1986-1989 - Laserfiche WebLink

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MEMORANDUM . . . . . . . . . . . . . . . . February 10, 1988 TO: Paul Levine FROM: Robert Momberger SUBJECT: Work Plan for February 16 1988, Monitor Well Installation, Development, and Sampling Another phase of monitor well installation will begin at SHAD on February 16, 1988. All field activities will be carried out according to the USATHAMA Geotechnical Requirements manual (May, 1987) with drill cutting And purge water containment procedures being the same as during the previous (October 1987) field effort. To briefly summarize the activities: Monitor Well Inslai atipn There will be 2 monitor wells installed: 438 CD and 439 CD (see enclosed map). The wells will be drilled first to 100 feet at each location and then sampled by split-spoon every 5 feet until completion. Included with this letter are lithologic logs of 438-C, 438-D, and 439-C. The proposed CD wells are to be installed in the saturated aquifer zones between the existing C and D well depths in the North Balloon area. The locations have been marked with flagging. I suspect the CD zone to exist at 438 between 135 to 165 feet and at 439 from 125 to 150 feet. We want to monitor the upper 15 feet (via the standard sand filter-pack region) at each location. The portable electric logger will not be run in these wells. All drill cuttings will be contained in a dump truck and the shaker box. The dump truck will then dump cuttings from each cluster onto a plastic sheet in a bermed area in the South Balloon. Each cluster cutting pile will be marked with the well number. The shaker box and all drilling equipment will be steam cleaned by the drill crew after each well is completed. Original well log sheets will be sent to Charlie Whitten and copies sent to ESE within three working days of well completion. Development There is approximately a 48-hour waiting period after grouting a well before it can be developed. Each well will be developed by submersible pump. Five volumes must be purged: five times each of the drilling water used (that entered the formation), the volume of the water in the well and the volume of water in the annular space. Field pH and specific conductivity readings of the well water will be recorded at the beginning, middle, and end of the development. A pint jar of the development water last pumped from each well will be retained for USATHAMA. All purged well water will be pumped into a water tank truck and then dumped into the containment pool and