7.1. SR 09-17-2012 - Laserfiche WebLink

Home Browse Search

(01) On-site Groundwater. The Licensee shall perform on-site water quality testing at the monitoring wells in the manner required by the MPCA permit. The wells shall meet current Department of Health Well Code Standards. The Water Quality report shall be submitted to the City when it is submitted to the MPCA. Groundwater levels for well P310C have consistently shown elevations which are 3-5 feet higher than expected. The groundwater flow interpretations show radial flow from the well. The groundwater flow interpretation indicates ongoing anomalous water level conditions at P310C. This implies a localized radial flow or perched groundwater condition and the well screen is not intercepting groundwater which is downgradient from the waste fill area. Given the current water level data and groundwater flow interpretation, this well cannot function as a downgradient compliance point. ERL has recently regraded this area of the Site which may change the recharge conditions and normalize the water level readings. If this does not occur by December 2013, ERL must replace well P310C with a suitable downgradient monitoring point in this vicinity. (02) Surface Water Quality. The Licensee shall have surface water quality tests performed in conjunction with sampling quarterly events when water is present. (03) Off-Site Groundwater Quality. The Licensee shall annually sample the individual private wells identified in the Sampling and Analysis Plan required by Section 4 (11). (04) Lysimeters. The sampling and contingency action protocols for liner leaks shall be as outlined in the Phase IV Water Quality Monitoring Work Plan, revision#3 dated February 2003 as updated/revised. (05) Modification. The testing programs specified in this Section 12 may be modified by City staff if City staff reasonably determines there exists a need for additional wells to be tested or additional parameters to be analyzed, based upon water or air quality test results indicating the presence of contamination. (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.) Hydroggeologic 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. 17