7.1. SR 10-21-2013 - Laserfiche WebLink

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(06) Split Samples.The Licensee shall notify the City forty-eight(48)hours before any sampling of groundwater or surface water and allow the City at its expense to obtain split samples of such waters. 13.) Hydrogeologic Investigation.The investigation of the hydrological and geophysical characteristics of the site shall be continued and any other new information relating to the hydrogeologic impact of the site shall be reported to the City.Hydrogeologic reports shall be updated,amended,and modified as warranted by newly discovered or additional data acquired in the continued hydrogeologic investigation.Licensee shall notify City at least two(2)days in advance of any soil boring or well construction required by this License. ERL has concluded that P304C area impacts are the result of landfill gas effects. This situation is similar to P-320 area where contaminants are observed in deeper horizons of the outwash deposit. As previously noted the P304C well is screened 40-50 below the groundwater surface and located more than 500 feet from an unlined area of the landfill. Landfill gas effects are more common for water table wells in proximity to unlined landfill areas. The results for gas probe, GP-17 which is located directly adjacent to P304C,show no detectable levels of methane for monitoring conducted in recent years. Tetrahydrofuran and ethyl ether,which are signature parameters for leachate impacts for PC17C,show increasing trends. The evidence for P304C indicates that leachate impacts are also occurring. P314C is located in a sidegradient orientation to P304C and the source area for groundwater at P314C may involve more extensive contamination.The screen position for nearby well P303C is roughly 20 feet in elevation above the screen elevation for P314C and may be missing potential contamination in the deeper portion of the outwash at this location. ERL must conduct additional contaminant investigation and monitoring in the vicinity of P304C,P320 and an area southeast of P314C. This approach is supported with emphasis on evaluating the deeper outwash. 14.) Dust,Noise,and Odor.Fugitive dust emissions off-site shall be controlled at the Landfill Site as necessary by undertaking the following:road surfaces within the Landfill Site shall be wetted with water or an appropriate chemical whenever off-site dust levels become unreasonable as determined by the City Environmental Administrator.Dust pollutives shall be utilized to the extent necessary on cover material such as stockpiles to reduce wind erosion as well as on other exposed surfaces as appropriate.Cover compaction and revegetation activities shall be undertaken promptly on the completion of various fill areas and vegetative cover capable of quick growth shall be utilized.Plantings of bushes and trees shall be installed if needed to buffer the Landfill Site and minimize wind erosion. 18