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KLE9/tl9Ft NFELDER <br /> MP ie.Right W RhOm <br /> Total coliform organisms are at a concentration level of <1.1 Most Probable number <br /> (MPN)/100ml for both the McKinley Avenue Area wells and the Louise Avenue wells. <br /> During the fourth quarter 2011, the groundwater flow direction in the vicinity of the CNP <br /> Plant Area was to the south and the flow direction in the McKinley Rapid Infiltration <br /> Area was to the west. The groundwater flow direction in the Louise Avenue Application <br /> Areas was calculated to be towards the west. <br /> 2011 Results <br /> ' Groundwater monitoring was conducted at the CNP facility during each of the four <br /> quarters of 2011 . Groundwater elevations and samples were obtained from each of the <br /> ' nine monitoring wells located at the site. The groundwater flow directions and gradients <br /> noted at the site throughout 2011 were generally consistent with previous findings. <br /> Groundwater quality during 2011 for the monitoring wells displayed pH ranging from <br /> 7.07 to 7.41 in the McKinley Avenue Rapid Infiltration Area and 7.09 to 7.57 in the <br /> Louise Avenue Application Areas, which were within the acceptable range for pH (6.5 to <br /> 8.5). <br /> The TDS concentrations in the McKinley Avenue Rapid Infiltration Area ranged from <br /> 650 to 1,300 mg/l. The TDS concentrations in the Louise Avenue Application Areas <br /> ranged from 180 to 1,200 mg/l. The majority of the detected concentrations of TDS <br /> ' exceeded the recommended SMCL (500 mg/1) and in some cases the SMCL upper <br /> limits (1,000 mg/1). <br /> Nitrate as N was detected in each well in the McKinley Avenue Rapid Infiltration Area <br /> with concentrations ranging from 2.5 to 37 mg/I. In 2011 the MCL for nitrate (10 mg/1) <br /> was exceeded in two wells [W-1 (second and third quarters) and W-5 (each quarter)]. <br /> In the Louise Avenue Application Area the nitrate as N concentrations ranged from 0.27 <br /> to 41 mg/l. The MCL was exceeded in L-2 and L-3 (all quarters), L-4 (second and third <br /> quarters), and L-6 (fourth quarter only). <br /> Ammonia as N concentrations were detected twice in 2011 in the McKinley Avenue <br /> Rapid Infiltration Area with concentrations ranging from 0.10 to 0.16 mg/l. Ammonia as <br /> 1014116.41STO12R025 Page 2 of 20 February 1, 2012 <br /> ' Copyright 2012 Kleinfelder <br />