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16 October 2013 <br /> AGE Project No. 99-0682 <br /> Page 5 of 5 <br /> chemical oxidation pilot test, concentrations of contaminants increased vertically _ <br /> from MW-1A (screened 20-40 feet bsg) to MW-8 (screened 59-69 feet bsg) during <br /> the previous event in March 2013 and the current event in September 2013. With <br /> the exception of the pilot test, higher concentrations observed in well MW-8 maybe <br /> a result of historical deeper groundwater conditions and/or a steep downward <br /> vertical gradient between wells MW-1A and MW-8 (approximately 0.018 ft/ft). <br /> • No analytes were reported at or above laboratory detection limits in groundwater <br /> samples analyzed from well MW-1 C (screened 125-135 feet bsg). <br /> 5.0. RECOMMENDATIONS <br /> Based on the conclusions presented in this report,AGE recommends continuation of semi- <br /> annual groundwater monitoring. The next sampling event should be performed in <br /> March 2014. <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily <br /> exercised by environmental consultants practicing in this or similar localities. Findings were <br /> based upon analytical results provided by an independent laboratory. Evaluation of the <br /> hydrogeologic conditions at the site for the purpose of this investigation was made from a <br /> limited number of available data points (e.g., groundwater samples) and subsurface <br /> conditions may varyaway from these data points. No other warranty, expressed or implied, <br /> is made as to the professional interpretations, opinions and recommendations contained <br /> in this report. <br /> Advanced GeoEnvironmental,Inc. <br />