ARCHIVED REPORTS_XR0005492 - Laserfiche WebLink

Home Browse Search

5.0 DISCUSSION 5.1 Introduction A great deal of soil analytical data has been collected for the Franks One Stop site Areas of ' contamination have been identified In addition, a fair amount of groundwater data is available though no monitoring wells have been installed at the site The following sections discuss the ' analytical results from all of the investigations that have been completed to date 5.2 Summary of Analytical Results ' All of the chemical analytical results that have been collected for the site are presented in Tables 1 through 16 Hydrocarbon contamination identified in the soil at the site appears to be fairly localized, ' primarily westerly of the former UST's However, the site has not been completely characterized Additional work needs to be completed to characterize the vertical and horizontal extent of contamination Figures 4, 5, 6, 7, and S present a summary of all the analytical results that have been collected to date for vaned hydrocarbon parameters Figure 4 shows the levels of the TPH-G reported at the site The highest levels of TPH-G contamination at the site have been from samples collected at each of the dispenser islands TPH-G has also been reported in and around the former UST area The levels of TPH-G appear to decrease with depth in most areas Figure 5 presents a summary of the TPH-D results for the site Lake the TPH-G data, TPH-D has been reported at each of the dispenser islands and also in former UST areas The highest fconcentrations of diesel range hydrocarbons are reported in samples from the dispenser islands at depths of between 1 5 and 4 feet below grade Figure 6 presents a summary of the Benzene data for the site Benzene has been reported in the former UST tank area as well as the gasoline dispenser island The highest levels of benzene are reported in the soil samples at approximately 4 feet below grade Figure 7 presents a summary of the MTBE data for the site MTBE has been reported in the UST area as well as in soil samples from the gasoline island area Figure 8 presents a summary of all the groundwater data that has been collected to date TPH-G, I TPH-D, Benzene, and MTBE levels area reported on the figure Significant concentrations of hydrocarbons were reported in groundwater samples The shape of the plume appears to be spread along a northwesterly axis Additional work needs to be done to define the extent of groundwater contamination f Remedy, Inc, Interim Investigation and Remediation Report September 16, 1998 Frank's One Stop, 2072 W Yosemite Avenue Manteca, CA 015IIR RPT S I