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10/02 '00 THU 13:26 FAX 19259469968 EWIWEST WC @003 <br /> Minutes of 9 February 20001ting <br /> 10 February 2000 <br /> The injection of oxygen releasing compound (ORC) to treat groundwater at <br /> each former tank site; and <br /> • Soil and groundwater investigations performed to delineate the extent of soil <br /> and groundwater impacts at each tank site and monitor the effectiveness of <br /> ORC injection. <br /> Mr. Brandy stated Heinz believes that the site should be a candidate for"No <br /> Further Action" and that proper Closure documentation should be assembled to <br /> support this request. This is based on: <br /> The removal of the source of groundwater impacts at the site(e.g. the USTs <br /> and impacted soils); <br /> ORC was incorporated at the site two different times; <br /> Groundwater sampling results indicate that the concentration of chemicals in <br /> groundwater at the site are continuing to decrease or remaining stable; <br /> • Natural biodegradation is expected to continue to reduce the concentrations <br /> of chemicals in groundwater;and <br /> • Tank use ceased over 30 years ago and the defined limits of groundwater <br /> impacts are isolated to shallow zones at each former tank site. <br /> Mr. Knoll stated that he concurred that the chemical concentrations in <br /> groundwater are decreasing and/or remaining stable at each tank site and that <br /> he would expect conditions at the site to be favorable for biodegradation to <br /> occur. He also concurred that the source of groundwater impacts(USTs and <br /> soils)has been removed from the site and the extent of groundwater impacts is <br /> limited. <br /> Mr. Hartzel asked questions regarding the soil and groundwater investigations <br /> that have been conducted at the site. He asked if sampling had been performed <br /> to document the vertical extent of chemicals in soil and groundwater. Mr. <br /> Brandy stated that,at the request of the County, an investigation into the depth <br /> of impacts had been conducted and summarized in a letter submitted to the <br /> County. <br /> Mr.Hartzel asked if soil and groundwater samples had been analyzed for methyl <br /> tertiary butyl ether(MTBE)and other fuel oxygenates. He also asked if lead had <br /> 2 <br />