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1 ' groundwater contaminationsP resent. Furthermore, it is possible for the in situ bioremediation to take place without having to disrupt or shut down the facility in order to conduct the clean up. Finally, the augmented bioremediation process eliminated the PRP liability for the owner. ' Pacific Rim Environmental has the capability of remediating the petroleum impacted soil and groundwater at the Cheaper' #37 Facility to the levels that the PHS-EHD and CWQCB mandate for clean-up objectives. Pacific Rim Environmental and BIO-REM, INC. (the H-10 manufacturer) guarantee that if they do not meet the PHS-EHD and CWQCB objectives, they will at no additional costs, re-apply the bacteria on an "as--needed basis" in order, to meet the RHS-EHD and CWQCB clean- up objectives, providing, of course, the site was characterized properly by Parker Environmental Services. The objective is to reach non-detect levels. The average estimated time per clean-up of 20 to 40 weeks. The process would be termed complete when laboratory results verify that the site has fallen below the clean-up standard set forth by the PHS-EHD and CWQCB. Exact methods for monitoring and closure are outlined in section 4. 3 of the RAP. Once the ' bioremediation is completed and the petroleum hydrocarbons have been eliminated the H-10 cultures die off. Since the cultures are specialized to consume hydrocarbons, once the hydrocarbons are completely degraded their food source is exhausted and they expire. The by-product of this augmented in situ process is simply carbon dioxide, water and residual bio mass. There are no other by- products during the remediation or after. Pilot studies are not required. 4. 3 Confirmation of Clean-up The final stages of the bioremediation process consist of weekly monitoring ' and confirmation of the bioremediation degradation. Actual monitoring of the site is performed through the borings/wells utilizing a photoionization detector (PID) . More specifically, this instrument measures the volatiles existing within the borings/wells or within the actual bag samples which may be obtained by interim field exploration. The purpose of field monitoring is to plot the degradation of the ' hydrocarbons as they are broken down into lighter and more volatile petroleum compounds. It is important to note that bioremediation is not soil venting or aeration. There are no volatiles, nor any by-products released into the atmosphere. This interim monitoring stage can be easily characterized and plotted 1 and appears as a traditional bell curve. Examples of these monitoring curves amy be found within Appendix A, Case Studies, and more specifically within the graphs presented for the Williams Air Force Base in Arizona. Once the volatiles measured ' by the PID decrease to non-detectable levels for a consistent period of three weeks the site will be reviewed and a final site investigation will be conducted. Final laboratory samples will be obtained for the purpose of closing and proving the completion of the bioremediation process. The exact methodology for sampling protocol may be found in Appendix B. At least one confirmation soil sample will be obtained for each one hundred cubic ' yards of the contaminant plume treated. All soil samples will be labeled appropriately in the field. Labels will include: sample location, depth, date, time, job number, and field identification number. Samples will be placed immediately inside a storage container and will be maintained at 4 degrees Celsius/39. 2 degrees Fahrenheit and monitored with a thermometer to ensure that ' 13