Professional Services Agreement - Jones Petrie Rafinski - EPA Mandated Groundwater Investigation Assistance

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Scope of Work and Cost Proposal for Beck's Lake NPLILaSalle Park Area August 6, 2018 Page 2 of 8 Task 2 - Downgradient Offsite Monitor Well Installation and Sampling: The purpose of this activity is to determine the downgradient extent of groundwater impacts (exceeding established maximum contaminant levels [MCLs]) identified along the northern property boundary of the LaSalle Park property per EPA requirements. Prior to initiating the scope provided in Task 1 and Task 2, a plan must be finalized and incorporated into a Work Plan Addendum required under Administrative Settlement Agreement and Order on Consent (ASAOC) Amendment 2, which is subject to EPA approval. Should no waste fill material be observed during the offsite waste fill delineation, a total of eight monitor wells (including five shallow wells and three deep wells) will be installed in the right-of-way along the north side of Linden Avenue across from LaSalle Park as required by EPA. Each monitor well will be installed with a truck -mounted hollow -stem auger drilling rig. Each well will be constructed of 2-inch diameter PVC casing and screen (0.010-inch slot — five-foot length for deep wells and 10-foot length for shallow wells). The shallow wells will be set to straddle the upper water table which is typically encountered between 5 feet and 10 feet below grade level (bgl). The deep wells will be set with the well screens set at intervals similar to that of the nearest onsite deep wells. The total depth of the nearest deep well is between 35 feet and 40 feet bgl. Up to three soil samples from each monitor well boring will be collected for laboratory analysis. Proposed monitor well locations are depicted on Figure 1. As required following monitor well installation and development, each monitor well will be surveyed for location and elevation by an Indiana licensed land surveyor. Groundwater levels will be gauged from each new monitor well, as well as, all existing monitor wells prior to groundwater sampling. Groundwater samples will be collected from each of the new monitor wells for laboratory analysis. Soil boring advancement, soil sampling, monitor well installation, completion, development, and groundwater sampling will be performed in accordance with the EPA - approved Field Sampling Plan (FSP).