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PROPOSED SCOPE OF SERVICE: Task I -Baseline Measurements In order to evaluate the effectiveness of ORCO, baseline measurements for the site will need to he oollected. Once such critical parameter is the level of dissolved oxygen (DO) in the groundwater. DO is often the rate-limiting component of biodegradation. However, nitrogen and phosphorus can also limit the rate of biodegradation. Further, there must be an adequate microbial population for natural biodegradation to occur. To confirm that adequate indigenous parameters exist at the site, we plan to establish in-situ baseline DO levels for all four wells. Redox, pH, electical conductivity, temperature, and groundwater elevation readings W3 also he measured and recorded. In addition to the above in-situ measurements, a groundwater sample will be collected from well MW-2 and analyzed for the fallowing parameters-. Heterotrophic Plate Count Phosphate Ammonia Nitrogen Chemical Oxygen Demand Biological Oxygen Demand The results of the above measurements and analyses will be used to determine whether injection of ORGS by Itself will be sufficient, or if addition of nutrients in conjunction with the ORCS will be necessary. Task 2-ORCO/Nutrient Placement The ORCO, and any needed nutrients,Will be inserted into monitoring well MVV-2 via an ORC D sock. A vertical sock length of approximately 20 fleet is proposed. Once Inserted, groundwater samples will not be able to be collected from well l VVL2 until the sock has been depleted and removed. Farther, a sufficient recovery period will likely be necessary fallowing sor* fernoval Before representative water samples can be collected from well MW-2_ Due to this, the sock will be inserted immediately following a complete quarterly sampling and monitoring episode. Task 3-Groundw a onitoring Monthly monitoring of DO, redox, pH, electical conductivity, temperature, and groundwater elevations are proposed for all four wells. The monthly readings will be conducted for a period of three months following placement of the ORCO. At the conclusion of the third rmanth, a second groundwater sample will be collected from well MW-21 and analyzed for the following parameters to evaluate ongoing indigenous conditions: