ARCHIVED REPORTS_XR0005524 - Laserfiche WebLink

Home Browse Search

Based on the results of the soil samples collected from the angled sod boring D-2, the vertical extent of impacted sod appeared limited to shallow subsurface soil The soil sample collected at 14 feet bgs from D-2 only contained a trace concentration of MTBE (0 0054 mg/kg) The soil sample collected at 23 feet bgs from D-2 did not contain detectable concentrations of MTBE, BTEX or TPH-as-gasoline TPH-as-gasoline and BTEX were not detected in either sod sample collected from D-2 Only a trace concentration of MTBE was detected in the soil sample collected at 20 feet bgs from D-1 TPH-as-gasoline and BTEX were not detected in either of the sod samples collected from D-1 On February 12, 1998, under PHS/EHD observation, L&M Construction excavated approximately 60 cubic yards of impacted soil from the vicinity of the west dispenser island The ' depth of the excavation ranged from approximately 7 feet near the former dispenser to approximately 12 feet beneath the former underground product distribution piping The excavated soil was stockpiled on site and remediated by passive aeration Soil sampling and analysis to confirm the excavation limits were not recorded in the case file ' On October 1, 1998, under PHSIEHD observation, FGL Environmental re-sampled the soil stockpile Two sod samples were collected from the accumulated soil stockpile for laboratory composite and analysis The composite sod sample was analyzed for TPH-as-gasoline and BTEX by Modified EPA Method 8020/8015 and for oxygenates by EPA Method 8260 Based on the results of the soil sample analyses, PHSIEHD allowed the soil stockpile to be disposed of on-site On October 1, 1998, under PHS/EHD observation, FGL Environmental also sampled the one on-site water supply well, located approximately 100 feet northwest of the former gasoline USTs (Figure 2) The groundwater sample was analyzed for TPH-as-gasoline and BTEX by Modified EPA Method 8020/8015 and for oxygenates by EPA Method 8260 None of the analytes were detected in the water sample Well construction details were not available The results of the ' domestic well groundwater analyses are summarized in Table 2 On March 25, 1999, Ramage Environmental published Underground Storage Tank Environmental Corrective Action Summary Report documenting the tank removal and subsequent corrective actions completed at the site Based on the analytical results from the sod samples collected from beneath the north end of the middle former UST, Ramage Environmental recommended that a work plan be developed to evaluate the vertical extent of impacted sod and to determine if groundwater is threatened 6