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~~ ~~ ~~~u w ~c~ni rnuri ~rouno txp brat ion -TO 7219298 P. 10 <br />Company, Inc. has worked on this site since 1990 drilling numerous <br />monitoring wells. We have done in excess of two million dollars of work <br />at this site. This site has extremely tight quality .control acquiring all <br />equipment to be thoroughly deconed and checked between each <br />boring and each conductor casing. Ground Exploration Company, Inc. <br />has drilled confining wells to depths in excess of 100'. <br />Industrial Site NE of Boulder CO.: <br />At this site the owner had a electronic manufacturing firm in operation for <br />approximately 20 years. The contaminated solvents were dumped into a <br />holding tank outside the building. The holding tank had a leak and let <br />the contaminated solvents into the upper soils- Ground Exploration <br />Company, Inc. did the original site audit and the following Remediation <br />project. One of the problems with the solvent that was leaked was that it <br />was heavier than water and traveled to the bottom of the water column to <br />the confining layer. Numerous borings were drilled a varying depths to <br />determine the exact confining layer and if the lower aquifer had been <br />impacted, by the leaking solvents. Conductor casings were placed using <br />a 8" I.D. hollow stem drilling a 12" O.D. hole. These holes were drilled to <br />numerous depths in the bedrock, grouted into place with Portland <br />Cement. Monitoring wells were placed 5' to 10' below the conductor <br />casing to determine if the lower groundwater was contaminated. <br />UMTRA Slte, Grand Junction Colorado (Uranium Mine <br />Tailings Remediation Authority): <br />Ground Exploration Company, Inc. abandoned the wells at the Chaney <br />Dam Site in Grand Junction. The Dam Site was being use to store <br />Uranium mine tailings from the Uranium Mill in Grand Junction <br />Colorado. These wells were 1800' deep, constructed out of steel and <br />P.V.C.. The steel casings were ripped and groused into place using a <br />Mills Machine Tool knife. The deepest well was 1800' deep. There were <br />4" P.V.C. wells to 1350' deep which were drilled out and grouted to the <br />surface. The grout consisted of Type V Portland cement with 5% <br />Bentonite. We also abandoned the wells at the Mill which were <br />