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MS.Wendy Cohen,P. E. <br /> February 4, 2000 <br /> Page 2 <br /> been determined, an excavation contractor will be hired to carefully remove <br /> the overburden from the wellheads using a backhoe or similar equipment. <br /> The condition of the wellheads and wells will then be assessed. Brown and <br /> Caldwell will visually inspect the containment boxes and seals for wells <br /> BC-9 and BC-10. We will then confirm the depth of the three wells and <br /> check for casing integrity using a 4-inch-diameter by 6 inch-long plug. The <br /> plug will be moved up and down the well to check for breaks or sharp <br /> deflections in the casing walls. <br /> Should the casings for the three wells be intact,Brown and Caldwell will repair <br /> any damage to the seals and security boxes and redevelop them for future <br /> monitoring.Redevelopment activities will include alternately surging the <br /> screened interval and purging water until a minimum of five well volumes has <br /> been produced and the effluent is relatively clear and sediment free. <br /> Immediately following completion of redevelopment activities,we will collect <br /> a groundwater sample from each well following methods used during <br /> semiannual groundwater monitoring events for the site. <br /> Should our inspection indicate that the casing of any well is damaged below <br /> the surface,Brown and Caldwell will prepare a plan for proper destruction and <br /> replacement of that well. <br /> If you have any questions regarding this Work Plan, please contact me at <br /> (925) 210-2278. <br /> Sincerely, <br /> BROWN AND CALDWELL <br /> Todd Miller,R.G. <br /> Senior Geologist <br /> TM:ms <br /> CC: Mr. David R.Marrs, Brown and Caldwell,Pleasant Hill,California <br /> Ms.Julie B. Raining, Georgia-Pacific Corporation,Atlanta, Georgia <br /> 02/04/00\\BCP}{LOI\WP\18420\Lewers\18420-001\W ell Rehabl.d.d\. <br />