Laserfiche WebLink
k� <br /> Problem Assessment Report December 5, 19$9 <br /> USA Petroleum Station No. 65, Lodi, California AGS 87050-3 <br /> f <br /> receiving agency. Because initial contaminant levels are expected to exceed maxinwm levels <br /> set by the local wastewater treatment plant,direct discharge will probably be unacceptable. <br /> 13j�)reactor� <br /> This treatment alternative involves the creation of a growth environment conducive to <br /> specific strains of bacteria. These bacteria are selected for their ability to metabolize <br /> organic compounds (hydrocarbon constituents) into energy for cell maintenance and <br /> reproduction. Essentially, this process converts a soluble organic compound into an <br /> insoluble organic (cell protein) and less toxic material that can be physically removed from <br /> a water stream. The design and operation conditions for a system of this type are quite <br /> expensive using conventional activated sludge technology and may require contaminant <br /> concentrations greater than 50 ppm. As the concentrations of the contaminants needing <br /> treatment increase, the biological process becomes more economical. Unless higher levels <br /> # of contaminants appear in other wells, this method should not be considered. <br /> Waste Hauling and Offsite Disposal <br /> t The contaminated ground water can be removed from the site by hazardous waste hauling <br /> prior to treatment. This method is.not currently recommended because of the continued <br /> liability of the client for the disposal of a regulated substance and the cost involved for. <br /> J . onsite storage, transportation of the liquid, and waste disposal. <br /> I <br /> Cost EvEluation of Remedial Alternatives <br /> Preliminary cost estimates for possible mitigation programs are presented in Table 16. <br /> These estimates are based solely on our understanding of the sitc'and other broadly similar <br /> situations. -I'liey should not be construed as actual budgets or estimates of the costs for <br /> implementing the programs at this site. <br /> p8, g <br /> { <br /> S, <br /> 3 <br /> r <br /> `' r t <br />