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Page 1 of 1 <br /> Frank Girardi [EH] <br /> From: Michael Carroll [mcarroll@co.san joaquin.ca.us] <br /> Sent: Thursday, December 29, 2005 4:51 PM <br /> To: Robert McClellon [EH] <br /> Cc: Frank Girardi [EH]; Desi Reno; Jaime Perez; Marcus Davenport <br /> Subject: Harney Lane Landfill Inspection <br /> Good afternoon Robert, <br /> I just had an excellent conversation with Frank Girardi. He showed me some pictures of erosion and burrowing <br /> that we need to fix. We are beginning to implement a poison bait program at this landfill, hopefully this will reduce <br /> the problem with burrowing. I asked Frank to please email the document with those pictures so I can forward <br /> them to Jaime and Marcus. <br /> One thing he and I talked about was Area of Concern 1 a: the apparent erosion at the shoulder of the secondary <br /> site. I explained to Frank that he was seeing "calving" of the remainder of the berm originally installed at the top of <br /> the slope. I described how the original closure included that berm, comprised of additional soil on the vegetative <br /> layer. This berm was originally intended to direct rainwater to the drop inlets, but because the slope provided by <br /> these original berms was not steep enough to maintain drainage after a few years of landfill settlement, we <br /> removed it in the Surface Reconditioning project. However, not all the berm was removed, and the residual <br /> portion at the top of the slope is subject to calving and sliding down the hill in the rain, spreading the berm soil <br /> over the vegetative layer below. I believe you and 1 may have inspected several of these areas earlier this year(or <br /> was it last year?) at the west side of the secondary site. As I remember, we agreed that the crumbling berm <br /> residual would be raked and reseeded, but would not need to be restored, as the berm soil represented additional <br /> soil above the minimum 1-ft vegetative layer. <br /> Although I expect to see less of this as the years go by, I also expect that we will see this calving of the berm soil <br /> from time to time. <br /> I thought it worthwhile to mention this condition, now that the rains have started again. <br /> Regards, and have a happy new year. <br /> Mike <br /> W. Michael Carroll, PE <br /> Senior Civil Engineer, Solid Waste Division <br /> 1810 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> Voice: 209-468-8504 <br /> Fax: 209-468-3078 <br /> 12/30/2005 <br />