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City <br /> <br />TO: <br /> <br />FROM: <br /> <br />DATE: <br /> <br />SUBJECT: <br /> <br /> MEMORANDUM <br /> <br />Mayor and City Council <br /> <br />Rebecca Haug, Environmental Technician <br /> <br />September 4, 2002 <br /> <br />Old City Dump <br /> <br />Item 5.9. <br /> <br />Proposal - Mark Johnson, Leisch Associates, Inc. sent Stephen Rohlf the Groundwater <br />Monitoring Results from the Old City Dump (located in Hillside Park south of CSAH 12) <br />on July 16, 2002. Liesch Associates, Inc completed the groundwater sampling on June <br />17, 2002. Samples were taken at monitoring wells MW-1, MW-2, and MW-3 within the <br />dump, and the Vandenberg and Hipsag residential wells located west and southeast of the <br />dump. The Kirkeide and Brown residences, formerly located south of the dump, no <br />longer exist. <br /> <br />FINDINGS <br /> <br />· There were only two VOC detections for this sampling event. 1,1,2,2- <br /> tetrachloroethylene was identified at 0.88 parts per billion (ppb) in MW-2 and <br /> 1,1,2-trichloroethylene (TCE) was identified at 2.4 ppb in MW-3. No VOCs were <br /> detected in MW-1, or the Vandenberg and Hipsag residential wells. <br />· VOC concentrations at the monitoring well locations continue to decline. <br />· The concentrations are below current Minnesota Department of Health (MDH) <br /> Health Risk Limits (HRLs) for drinking water. <br />· MW-1 has a damaged outer-casting that should be repaired. A local well <br /> contractor has been contacted for repairs. <br /> <br />RECOMMENDATION <br /> <br />Staff recommends the following: <br /> <br />1. Annual monitoring continues until future plans for the site are known. <br />2. Results of the private well testing continue to be sent to the individual <br /> residence. <br /> <br /> <br />