WORK PLANS - Laserfiche WebLink

Home Browse Search

KEI-P89-1104 .P4 July 19, 1990 Page 5 A. Due to the presence of tar materials with the ground water (tarred well casing) , the water well casing should be either completely removed from the ground or otherwise isolated from the adjacent soil and ground water. B. The well casings are proposed to be drilled out using 12- inch diameter augers (greater than ten-inch inside diameter) for the full depth of the well (approximately 135 feet) . C. An attempt will be made to pull out both the six and ten- inch diameter casings intact. However, if it appears (in the opinion of the drilling contractor) that the casings cannot be retrieved intact without leaving some casing pieces at an unknown depth in the well boring, removal of the casing should not be attempted. If the casings can be retrieved intact, the bore hole shall be backfilled with neat cement grout or with Baroid Aquagrout Benseal using a tremie pipe. D. All soil materials and liquid generated during well abandon- ment activities will be placed into DOT-approved drums and stored on-site until proper disposal can be arranged. E. In the event that the well casings cannot be retrieved in tact, the annulus between the 12-inch diameter boring and ten-inch diameter casing and the interior of the six-inch diameter casing will be backfilled with neat cement or Baroid Aquagrout Benseal as discussed above in Item C, and all soil or liquid materials generated will be handled as discussed in Item D above. F. The vicinity of the water well will be restored to its original condition with the placement of asphaltic concrete by a separate contractor. G. Based on recent discussions with Mr. Dan Purviance, Pur- viance Drillers, Inc. is in the process of constructing the 12-inch diameter augers necessary to satisfactorily destroy the existing water well. We understand that the estimated completion date is approximately six months from the date of this revised work plan/proposal. Once these custom made augers are completed, a date will be determined to destroy the water well under County permit. H. A technical report will be prepared describing the results of the well destruction activities within 45 days of the completion of the well destruction, and will be submitted to the SJCPHS and the DWR.