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Page 1 of 1 <br />From: Michael Carroll [mcarroll@sjgov.org] <br />Sent: Tuesday, June 01, 2010 3:57 PM <br />To: Robert McClellon [EH] <br />Cc: Natalia Subbotnikova [EH]; Joyesh Chandra <br />Subject: Abandoning unsuccessful well MW -6 at Harney Lane Landfill <br />Good afternoon Robert, <br />Joyesh and I are considering how to leave the unsuccessful well at Harney Lane that we talked to you <br />about earlier today. The "replacement" well will be installed a few feet away from this first attempt, and <br />we want to make sure that we don't put neat cement into the aquifer where it would affect the new well. <br />So we think we should fill inside the casing to the top of the screened interval with sand, then 10 feet of <br />bentonite above that Oust like the well seal was planned for the outside of the casing), then neat <br />cement slurry to the surface. <br />Sound OK? <br />I <br />W. Michael Carroll, PE <br />Senior Civil Engineer, Solid Waste Division <br />1810 E. Hazelton Ave. <br />Stockton, CA 95205 <br />Voice: 209468-8504 <br />Fax: 209-468-3078 <br />6/1/2010 <br />