Agenda - Council - 10/22/1985 - Laserfiche WebLink

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Mr. Daniel A. Comeau September 25, ]9~~, Page Seven 18. The exact location of areas of hazardous waste disposal is not known; however, the likely area of hazardous waste disposal can be surmised from information provided in the Evaluation Report. It is believed that the disposal of hazardous materials did not take place after 19Z2. The most recent subsequent air photo was taken in 1973, which shows the area of disturbance, is Figure 34 of the Evaluation Report. It is therefore believed that disposal of hazardous materials would likely have been confined to the northern and western portions of the landfill, as shown in Figure 34. An effort is being made to further delineate areas of past hazardous waste disposal. At this time, specific information has not been revealed during our on-going records search or telephone calls. Pertinent information will be provided to the MPCA as and if it becomes available and will also be documented in the Final Report and shown on the updated topographic site map. 19. The updated topographic site map which will be submitted as part of the Final Report will include the location of wastewater treatment sludge impoundments, The information is available in the submitted Evaluation Report on Figures 32, 33, and 34. 20. The updated topographic site map which will be submitted as part of the Final Report will include location of the current water treatment lime sludge stockpile area. The location of this area has been submitted in the Evaluation Report and is shown on Figures 36, 37, and 38. ,.Monitoring Well Installation 21. ~ages 23-26. The two lysimeters installed beneath the Anoka Sanitary Landfill are still in existence. The location of the lysimeters is shown on Figure 9 of the Evaluation Report. Anoka County has periodically monitored the lysimeters with no reported water quality impacts. Air Quality Investigations 22. Page 29. A September 1980 report by Ingrid Ritchie, Ph.D., entitled, "Migration of Landfill Products from the Anoka Sanitary Landfill Located at Ramsey" (enclosed) provides analytical results of landfill gas samples. "...concentrated gas samples were collected from the soil (August 20, 1980) and the gas venting stack (September 9, 1980) into aluminized Mylar bags. These samples were analyzed by the Minnesota Department of Health and Agriculture and by the University of Minnesota (Biological Sciences, Biochemistry}. The qualitative analyses by gas chromatography/mass spectrophotometry did not detect the presence of chlorinated hydrocarbons, volatile acids, cyclic or aliphatic hydrocarbons at levels of 50 ng/2 ul injected sample. Methane, carbon dioxide, water vapor, nitrogen, and argon were detected."