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contact with groundwater during times of high groundwater elevation. Groundwater flow direction is <br /> toward the north-northwest at a gradient of approximately 0.04 to 0.07 ft per foot. <br /> A summary of the groundwater analytical data compared to the MTCA Method A screening levels is <br /> presented in Table 2. No concentrations exceeding MTCA Method A screening levels have ever been <br /> detected in wells MW-2 through MW-6. During the 2011 sampling events, TPHo exceeding MTCA <br /> Method A screening levels was detected in groundwater from monitoring well MW-l. Monitoring <br /> wells MW-7 and MW-8 were installed on October 3, 2011 downgradient of monitoring well MW-1 to <br /> define the lateral extent of TPHo in groundwater. No concentrations were detected above MTCA <br /> Method A screening levels in monitoring wells MW-7 or MW-8. TPHo impacted groundwater is <br /> limited to a small area surrounding monitoring well MW-1. <br /> TPH in the diesel range (TPHd) exceeding MTCA Method A screening levels was detected in <br /> groundwater from monitoring well MW-1; however, these detections were flagged by the laboratory as <br /> "most closely resembling a motor oil/transformer oil product." Based on historical records, diesel has <br /> not been stored at the Site. Therefore, the TPHd detections are a result of the lighter end hydrocarbon <br /> range of oil, which are part of the hydrocarbon range covered by TPHo. <br /> 017386-174(123) 3 THIS DOCUMENT IS PRINTED ON RECYCLED PAPER <br /> Encore Environmental Consortium,LLC <br />