Laserfiche WebLink
4. Petitioner's site is located in a commercial/residential area. No water supply wells are <br /> located within 800 feet and the nearest surface water is about 2,000 feet from the site. <br /> 5. There are no active municipal water supply wells within 2,500 feet of the site. <br /> 6. Additional soil and water remediation at Petitioner's site is not necessary. <br /> 7. The level of site cleanup is consistent with the maximum benefit to the people of the <br /> state. <br /> 8. Given the adverse technical and economic implications statewide if further corrective <br /> action other than monitoring was required, and the minimal benefits, if any, that would be gained <br /> by further corrective action, it is not feasible to attain background water quality at Petitioner's <br /> site. <br /> 9. Detectable concentrations of BTEX in shallow groundwater in contact with the limited <br /> residual petroleum hydrocarbons adsorbed to soil particles may remain above MCLs and thus <br /> violate the Basin Plan objectives in a very localized, small volume of surrounding groundwater <br /> for decades. <br /> 10. Detectable concentrations of TPH-g in shallow groundwater in contact with the <br /> limited residual petroleum hydrocarbons adsorbed to soil particles will likely remain above 5 ppb <br /> (the commonly accepted odor threshold for drinking water) and thus violate the Basin Plan's <br /> narrative odor objective in a very localized, small volume of surrounding groundwater for <br /> anywhere from decades to hundreds of years. <br /> 11. The determination as to what constitutes a reasonable period to attain water quality <br /> objectives must be based on evaluation of all relevant factors, including but not limited to the <br /> extent and gravity of any threat to public health and the environment during the period required <br /> to meet Basin Plan objectives. Although the time required to attain objectives in this case is <br /> lengthy, it is a reasonable period considering the facts of this particular case, including that there <br /> are no known drinking water wells within 800 feet of the site and that affected water is of inferior <br /> quality and will likely be excluded from any well which may be constructed in the future. It is <br /> highly unlikely that petroleum constituents detected in the immediate area of the discharge will <br /> migrate substantially beyond the current limited spatial extent, and it is highly unlikely that this <br /> particular very limited pocket of shallow groundwater will be used directly as a source of <br /> drinking water in the foreseeable future. <br /> 12. Both the County and the Regional Board do not agree that residual diminishing <br /> concentrations of petroleum hydrocarbons remaining at the site do not threaten the beneficial use <br /> 14 <br />