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Corral Hollow Sanitary Landfall * ration Monitoring Wells Page 1 of 6 <br /> Natalia Subbotnikova [EH] <br /> From: Michael Carroll [mcarroll@sjgov.org] <br /> Sent: Wednesday, March 28, 2007 10:31 AM <br /> To: Todd Del Frate <br /> Cc: Natalia Subbotnikova [EH]; Robert McClellon [EH]; gyekta@ciwmb.ca.gov <br /> Subject: Corral Hollow Sanitary Landfill Migration Monitoring Wells <br /> Attachments: CH-4th Qtr 2006.xls <br /> Good morning Todd, <br /> Robert McClellon was kind enough to forward to me the email regarding our Corral Hollow Landfill, and I <br /> appreciate the opportunity to clarify a few points and to correct any incorrect impression that may have been left. <br /> As far as I know, only one probe of one migration monitoring well is plugged (GW-1-deep), by submergence <br /> below the water table. This has been documented by television inspection and reported previously. We would be <br /> pleased to investigate any other probes that might be in question at the request of CIWMB, RWQCB, or <br /> Environmental Health Department staff. Let me know, and we'll get right on it. <br /> As you requested, we will include the monitoring data of our combustible gas migration monitoring wells in all <br /> future reports to the RWQCB. I have also attached the last quarter's landfill gas migration monitoring. This <br /> spreadsheet is the download of the field data from SCS's GEM datalogger. Do you want any past data? We can <br /> send it right up. <br /> These data had not been included previously because the WDRs require monitoring VOCs, not the major <br /> gasses. We focus our reports to each agency based on the requirements of the site identified in that agency's <br /> permit, trying our best to keep our reports concise and not burden our regulators with information that seems <br /> extraneous. The information is easy to include, and we certainly would have included it if we had known of your <br /> concern. <br /> We can also send by email, fax, or Federal Express any information we have that is not in our quarterly reports, <br /> and also include any information you want in the reports. Just let us know in advance, and it will be there. <br /> Please do not hesitate to call with any questions or any other concerns, and we will do our best to address them <br /> immediately. <br /> Best regards, <br /> Mike <br /> W. Michael Carroll, PE <br /> Senior Civil Engineer, Solid Waste Division <br /> 1810 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> 3/28/2007 <br />