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� s • <br /> TABLE 7 <br /> Soil and Ground Water Corrective Action Alternatives <br /> CALIFORNIA FUELS CARDLOCK STATION <br /> 2402 Pacific Avenue, Stockton, California <br /> Estimated Costs(incl Typical Monitoring Estimated <br /> Method Advantages Disadvantages Monitoring and Requirements Durattdn <br /> Maintenance <br /> In-situ • Relal ively simple design and •Usually no immediate $105,400 to Monthly ground water 24 to 36 <br /> Bioremediation application process• LittIe or no reduction in hydrocarbon $135,400 total cost and vapor sampling, months <br /> (Ground Water) maintenance required concentrations•Remediation quarterly monitoring, <br /> controls difficult to implement microbiological <br /> Section 8 3 •Regulatory acceptance analysts of samples <br /> difficult to obtain• Waste <br /> discharge permits sometimes <br /> required <br /> Natural • Lower costs than most active •Not effective for higher Quarterly ground Unknown <br /> Attenuation remedial alternatives•Minimal contaminant concentrations• water monitoring <br /> disturbance to the site•Potential Migration of contamination <br /> Section 8 4 use below structures may occur•Longer time frame <br /> than active remediation• May <br /> not achieve cleanup levels <br /> within reasonable length of <br /> time•Not generally permitted <br /> when free product is present <br /> i <br /> i <br /> i <br /> Advanced GeoEnvironmental,Inc <br />