CORRESPONDENCE_2007 (1/07 - 6/07)

Home Browse Search

•Corral Hollow Sanitary Landfill,Ali gration Monitoring Wells Page 4 of 6 From: Robert McClellon [EH] [mailto:RMcClellon@slcphs.org] Sent: Tuesday, March 20, 2007 9:55 AM To: Yekta, Gino Cc: Wochnick, Michael; Todd Del Frate; Natalia Subbotnikova [EH] Subject: RE: Corral Hollow Sanitary Landfill inspection Gino, here is what I was able to find out. The ponding on Corral Hollow still remains. I spoke with Michael Carroll and met with him and his staff at the landfill on March 19, 2007. The ponding located south east of the landfill is at the toe of the slope and near the secondary storm pond. Michael Carroll disclosed that there was another area of ponding on the south west corner of the landfill that they found during the site visit (at the toe of the slope) . In conversation Mike agreed to regrade the areas and eliminate the ponding (they are small area's 5ft x 20ft) by May 1, 2007. During the site visit Probe 6 was tested. We tested the probe by placing a "T" in the line between our landtec and used Public Works landtec as a magnahelic. The shallow, intermediate, and deep probes were tested and the negative pressure was the highest in probe 6 shallow (7 .8 inches H2O) . The landtec was shutdown and the negative pressure drifted down to zero in less than 1 minute. The other probes intermediate and deep exhibited a negative pressure around 4.0 inches of H2O. Again the machine was shutdown and the pressure drifted to zero. There was no effort on the part of Public Works to make changes to the probe. The intermediate probe register 2. 6% CH4 . The shallow probe registered 0.3% CH4 and Deep was 2.2% CH4 . The probes are monitored quarterly by Public Works contractor SCS. The Environmental Health Department (EHD) was not trying to duplicate efforts, but merely spot check wells during our inspection. I hope this addresses your concerns. 3/28/2007