Laserfiche WebLink
No Further Action Required Determination -4 - 6 January 2011 <br /> Banta Road-UPRR Tracy-Fresno Line <br /> Tracy, San Joaquin County <br /> Threat to Human Health: SAIC's health risk screening evaluation determined that the TPH <br /> chemicals of potential concern detected did not exceed applicable environmental screening <br /> levels based on a residential scenario, and thus do not pose a threat to potential future <br /> onsite residents, construction/trench maintenance workers, or ecological receptors. The <br /> most likely future Site use will be for construction/trench maintenance workers. <br /> Summary: According to the investigations' results, the lateral and vertical extent of crude oil <br /> affected soil/groundwater is limited in extent and has been delineated generally beneath <br /> and within South Banta Road easement. The concentrations of residual petroleum <br /> hydrocarbon compounds at the Site will continue to naturally degrade with time. <br /> It is anticipated that the remaining residual crude oil would not present an unacceptable <br /> threat of direct human exposure based on a residential use scenario. <br /> Consistent with State Water Board Resolution No. 92-049, an evaluation of alternative <br /> cleanup technologies other than natural attenuation are ineffective, not easily implemented, <br /> and/or disproportionally costly in comparison to benefits. <br /> No comments to the NFAR were received during a 30-day public notice period. <br />