Laserfiche WebLink
JM Equipment Co. • - 3 - • April 2012 <br /> of the former USTs, monitoring wells and historic groundwater gradients is provided at the end <br /> of this five year summary. <br /> Remediation Summary <br /> • Free Product: No free product was documented throughout the life of this case. <br /> • Soil Excavation: Unknown. <br /> • In-Situ Soil Remediation: No soil remediation has been conducted. <br /> • Groundwater Remediation: Groundwater remediation reportedly delayed by 2011-2012 <br /> Cleanup Fund budget. Air sparging pilot test, conducted September 2011 through <br /> present. In-situ chemical oxidation by H2O2 injection pilot test, conducted September <br /> 2011 through present, and by ORC socks, conducted September 2011 through present. <br /> General Site Conditions <br /> • Geology and Hydrogeology: The Site is underlain by interbedded and intermixed sand, <br /> silt and clay. The depth to groundwater is approximately 13 feet bgs and the <br /> groundwater gradient is northeast at approximately 0.0006 ft/ft. <br /> • Residual Mass: Soil, 1658 gallons of TPHg; Groundwater, 64 gallons of TPHg. WOO <br /> will be achieved in 138 years by natural attenuation (GTI June 2009). <br /> • Groundwater Trends: There are more than 12 years of groundwater monitoring data for <br /> this Site. Benzene trends are shown below, source area (MW-9), near down gradient <br /> (MW-8) and far down gradient (MW-2). <br /> BENZENE Results for MW-9 <br /> 36000. <br /> 30000 <br /> _-� ; <br /> 20000 <br /> moo° <br /> soon <br /> of <br /> ,✓ I <br /> BENZENE Trene <br /> BENZENE R...It.for MW-8 <br /> w <br /> f <br />