Laserfiche WebLink
L ' <br /> 45'feet bsg from pilot boring MW-8 Analytes of concern were not detected in the soil samples <br /> • collected and analyzed from pilot borings MW-6 and MW-7 <br /> October 1999- Seven soil borings (B-10 through B-16)were advanced to collect and analyzed soil <br /> samples, in addition, one soil sample collected from boring B-11 was analyzed for permeability, <br /> porosity, total organic content and specific gravity Petroleum bydrocarbon-impacted soil was <br /> detected in soil samples collected from all soil borings except B-13,the highest concentrations were <br /> detected in soil samples collected from boring B-10, located adjacent to the former UST No 3 <br /> ` excavation <br /> J <br /> t <br /> July 2001 - An 8-hour step draw-down ground water extraction pilot test was conducted at the site <br /> High concentrations of petroleum hydrocarbons were detected in extracted ground water samples <br /> November 2004 - Based on the results of the July 2001 pilot test, a 24-hour constant rate ground <br /> water extraction feasibility test was performed at the site Detected concentrations of target analytes <br /> in extracted ground water samples were significantly lower than those reported for the July 2001 <br /> pilot test <br /> J . <br /> I Ground Water Monitoring T ' <br /> r' <br /> Based on analytical results of ground water samples collected during quarterly monitoring and site <br />' assessment activities,the lateral extent of impacted soil has been defined to the north,east and west <br /> However, the vertical extent of the contamination plume, as well as the lateral extent to the south, <br /> is not well defined <br /> , y r <br /> Cluster UST Area (North Area) <br /> IDecember 1998-Two 10,000-gallon UST and one 6,000-gallon UST were removed from a common <br /> excavation at the site <br /> October 1999-AGE advanced one soil bonng(B-9)for collection of soil and groundwater samples <br /> Significant concentrations of petroleum hydrocarbons were detected in samples collected from the <br />' boring Based on the findings from boring B-9,monitoring wells MW-9 and MW-10 were installed y <br /> near the former UST excavation area <br /> IJuly 2000 - Nine pilot borings were advanced at the site for installation of monitoring wells , <br /> MW-1 l AIB through MW-13A/B, air-spargmg well AS-1 and ground water extraction wells EW-1 <br /> and EW-2 Petroleum hydrocarbons were detected in soil samples collected from pilot borings EW-1 <br /> and MW-13B <br />' November 2002 - Four pilot borings were advanced at the site for installation of monitoring wells <br /> MW-14AB and MW-15A/B Target analytes were not detected above laboratory reporting limits <br /> in the soil samples submitted for analyses <br /> 1 , <br />