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The Estimated cost for Option 2 is S 209,000.00. The pricing is inclusive of(4) Quarters Of follow up Groundwater Monitoring. A spreadsheet for the estimate costs is provided as an Appendix A. 4tion 3 —In-situ Biologic Degradation of Petroleum Contaminants ' This option is an "in-situ" approach in that it uses petroleum-degrading microbes { (naturally occurring bacteria) to degrade the plume in place. This would be an enhanced natural attenuation approach that would use microbes selected from indigenous bacteria gathered from sampling done on-site. Wright was able to excavate down to a contaminated zone (see Figure 6 for locations) to obtain some of the most highly contaminated soil whereupon the sample was sent.to a microbiological laboratory for a small bench and data study. The bench scale and data study show that viable petroleum-degrading bacteria are present and can be mass- produced (See Appendix B). From the contaminated soil gathered on-site, Wright would produce a mass culture of water borne indigenous bacteria. In addition, a nutrient solution would be specifically formulated for the bacteria from laboratory grade chemicals to initiate and sustain a rapid microbial-breakdown of the hydrocarbon contaminants. The bio-solutions would then be deposited into the vadose soil, capillary fringe and aquifer. This would be accomplished by } 1 r-- drilling, and placing, several small 2" slotted PVC pipes around the perimeter of the identified contamination zone areas. Carbon probes would then be placed inside these PVC pipes. The bio-solutions would be introduced into the piping and a small DC current ` (Electro-Vectoring Charge) would be initiated through the carbon rods to direct the bacteria and nutrients that are contained in aqueous solution and are ultimately driven into and through the contaminated soil zone by the electrical charge. This process is repeated over defined intervals over a period of 3 to 6 months whereupon samples are taken to confirm contamination reduction. As this is an in-situ approach, the contaminant degradation would be dependent upon the indigenous bacteria and nutrient solution efficiency at degradation, and affecting the areas of interest. It is initially anticipated that this approach would last from 3 to 6 months to allow for plume degradation. Groundwater monitoring for indicators of degradation(iron, nitrate, sulfate, oxidation-reduction, oxygen and methane) would be added to the groundwater monitoring program to monitor effectiveness. Initiation of this clean up option would commence after obtaining the following approval of permits. • Approval of this CAP by PHS-EHD at CVRWQCB. • Well Drilling permits from PHS-EHD. • Pre-approval of clean up costs from USTCF. + The estimated Cost For Option #3 is S 133,000.00. The pricing is inclusive of (4) Quarters of follow up Groundwater Monitoring including degradation indicators. A spreadsheet of estimated costs is provided as Appendix A. Page 15