Laserfiche WebLink
rl (w7 <br /> • CAMBRIA <br /> 30 5 fbg samples at concentrations of 810, 7,600, and 6,400 ppm No TPHg was detected to the <br /> 40 5 and the 50 5 fbg samples TPHg was detected at a concentration of 2 1 ppm in the 70 fbg <br /> soil sample Benzene, fuel oxygenates, and lead scavengers were not detected in any of the other <br /> soil samples from boring SB-I <br /> Soil samples were collected from borings SB-2 through SB-4 at approximate depths of 10 5 (11 <br /> for SB-2), 20 5, 30 5, and 35 5 fbg None of these soil samples contained detectable levels of <br /> TPHg, benzene, fuel oxygenates, or lead scavengers <br /> The soil chemical analytical data are summarized in Table 2 and are presented on Figure 2 The <br /> certified analytical reports for the soil samples are presented in Appendix C <br /> HYDROCARBON DISTRIBUTION IN GROUNDWATER <br /> Groundwater samples were collected from borings SB-1, SB-3, and SB-4 to evaluate the <br /> presence of gasoline constituents in groundwater beneath the site The groundwater samples <br /> were collected at 67 fbg, which was believed to be the depth of first encountered groundwater <br /> beneath this site TPHg was detected in the groundwater sample collected from SB-1 at a <br /> concentration of 780 parts per billion (ppb) Benzene, fuel oxygenates, and lead scavengers were <br /> not detected in any of the groundwater samples collected <br /> Groundwater data are summarized in Table 3 and are presented on Figure 3 The certified <br /> analytical reports for the water samples are presented in Appendix C <br /> CONCLUSIONS <br /> The goal of this investigation was to delineate the vertical and lateral extent of petroleum <br /> hydrocarbons previously detected in soil at this site and to assess impact to groundwater if <br /> groundwater was encountered in the borings Borings SB-1 and SB-2 were drilled to assess the <br /> vertical extent of soil impact at the location of the highest TPHg concentrations during site - <br /> demolition Boring SB-3 and SB-4 were drilled adjacent to SB-1 and SB-2 to assess the lateral <br /> extent of impacted soil Groundwater samples were collected to deternune if groundwater has <br /> been impacted by gasoline constituents <br /> The soil analytical data suggests there has been limited impact to soil Borings SB-2 through <br /> SB-4 did not contain detectable levels of gasoline constituents, which suggests that soil impact is <br /> linuted to the shallow impact observed during the site demolition sampling event The soil <br /> 1511 4 <br />