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Jim Pinasco <br /> Page 8 <br /> August 1 , 1989 <br /> borehole during filter pack and cement seal placement. Failure <br /> to use centralizers during construction (depending on drilling <br /> technique) will compromise the integrity of well seals and <br /> efficiency of filter packs. <br /> If you have any questions, please contact me. <br /> Reid Buell, R.G. <br /> Associate Engineering Geologist <br /> Geologic Support Unit <br /> cc: Sherri L. Park, Chief <br /> Technical & Support Services Unit <br /> Region 1 <br /> David Wang <br /> Site Mitigation Unit <br /> Region 1 <br />