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Q <br />' ~l ~j <br />Elk REQUEST FOR ACTION <br />River <br />To Item Number <br />Ci Council 3.4. <br />Agenda Section Meeting Date Prepared by <br />Consent July 7, 2008 Rebecca Haug, Environmental <br /> Administrator <br />Item Description Reviewed by <br />Old City Dump <br /> Reviewed by <br />Action Requested <br />Staff recommends the following: <br />Annual monitoring continues until future plans for the site are known or no Volatile <br />Organic Compounds (VOC) are detected. <br />2. Results of the private well testing continue to be sent to the individual residence. <br />Background/Discussion <br />Liesch Associates, Inc. completed the yearly groundwater sampling on June 6, 2008. Samples were taken <br />at monitoring wells MW-2 and MW-3 within the dump. The Vandenberg and Hipsag residential wells <br />located west and southeast of the dump were not tested. The Kirkeide and Brown residences, formerly <br />located south of the dump, no longer exist. MW-1 formerly located north of the dump was sealed in <br />2002 when a parking lot for the city park was constructed in the area where the well was located. <br />FINDINGS <br />^ Volatile Organic Compound (VOC) detections were at a low level in MW-2. 1,1,2,2- <br />tetrachloroethylene (1'CE) was identified at 1.1 parts per billion (ppb) in MW-2. The PCE <br />level detected in MW-2 is consistent with historic low PCE concentrations. <br />^ Low levels of Trichloroethene (TCE) were detected at MW-3. The TCE was identified at a <br />level of 1.9 ppb. TCE was not detected in 2007 or 2005 but has been historically detected <br />since 1989 at decreasing levels. <br />^ VOC concentrations at the monitoring well locations continue to be stable and consistent <br />with previous samplings of these wells. <br />^ The concentrations axe below current Minnesota Department of Health (MDH) Health Risk <br />Limits (HRLs) for drinking water. PCE and TCE levels are currently set at 5 ppb. <br />Attachments <br />^ June 2008 Groundwater Monitoring Results for the Old City Dump -Tom C. Johnson, <br />Leisch Assoc., Inc. -June 23, 2008 <br />C:\Documents and Settings\jmiller\Local Settings\Temporary Internet Files\OLK3E\Action Requested (2).doc <br />