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' Mr Harim Knoll <br /> • 22 May 1998 <br /> Page 9 <br />' A sample collected from HB-11, located approximately 5 feet west of the <br /> excavation within the warehouse building, contained a TPH-g <br /> concentration of 350 mg/kg, as well as low concentrations of BTEX <br /> compounds A sample collected from HB-12, located approximately 5 <br /> feet west of HB-11, did not contain detectable concentrations of TPH-g or <br />' BTEX The capillary fringe sample collected at HB-14, located <br /> approximately 5 feet west of the excavation, contained a low <br /> concentration of TPH-g (85 mg/kg), as well as low concentrations of <br /> BTEX compounds The sample collected from HB-13, located <br /> approximately 5 feet south of the excavation contained low <br /> concentrations of TPH-g (69 mg/kg) and BTEX compounds <br />' locations urroundin UST #2 HB-1 <br /> None of the five soil sampling s g { <br />' through HB-5)contained detectable concentrations of TPH-g or BTEX <br /> Only one of the five ground water samples collected in the vicinity of <br /> UST #2 contained detectable concentration of TPH-g and BTEX <br /> N compounds This sample (HB-4), collected approximately 50 feet <br /> downgradient of the tank excavation, contained a TPH-g concentration <br /> of 39 mg/l A ground water sample collected from HB-3, located <br />' approximately 100 feet downgradient of HB4, did not contain detectable <br /> concentrations of TPH-g or BTEX compounds Figures 8 through 11 <br /> present the concentrations of TPH-g in soil, BTEX in soil, TPH-g in <br /> ground water, and BTEX in ground water at UST #2, respectively <br />' Final Site Work <br /> Following the soil and ground water investigation, ERM discussed the <br />' need for further investigation and remediation with the County Based <br /> on discussions with the County, the following final activities were <br /> completed at the site <br />' 0 Additional soil excavation at UST #1, <br />' • Monitoring well installation and sampling, and <br /> • Tank pit backfilling and resurfacing <br />' The following subsections present a discussion of each of these activities <br /> Additional Soil Excavation at LIST #1 <br /> Based on discussions with County, additional contaminated soils at the <br /> UST #1 excavation were removed on 1 May 1998 ERM performed <br />