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Table 7. Second Quarter 2010 Well- <br /> Water Samples with Concentrations <br /> Exceeding the Interim Limitations <br /> Cited in the WDRs. <br /> Constituent 9 wells <br /> No duplicates <br /> pH 1/9 <br /> Boron (mg/L 7/9 <br /> Chloride (mg/L 9/9 <br /> Iron (mg/L) 1/9 <br /> Manganese (mg/L) 8/9 <br /> Sodium (mg/L) 9/9 <br /> Total Coliform Organisms 1/9 <br /> (MPN 100/mL) <br /> Total Dissolved Solids 9/9 <br /> (mg/L) <br /> Total Kjeldahl Nitrogen 1/9 <br /> (mg/L) <br /> Nitrite as N (mg/L) 0/9 <br /> Nitrate as N (mg/L) 3/9 <br /> Ammonia as N(mg/L) 1/9 <br /> Bromoform (pg/L) 0/9 <br /> Bromodichloromethane 0/9 <br /> (lig/L) <br /> Chloroform (pg/L 0/9 <br /> Dibromochloromethane 0/9 <br /> pg/L <br /> 3.2.1 Total Dissolved Solids (TDS) <br /> Beneath the WWTF, Second Quarter 2010 TDS concentrations in the nine WWTF <br /> monitoring well samples ranged from 700 to 3,450 mg/L. Figure 5 shows TDS <br /> isoconcentration lines constructed from the Second Quarter 2010 well water <br /> sample results. The TDS concentrations generally are highest in the vicinity of <br /> LAS-1 and -2 and down gradient of the storage ponds, which is consistent with <br /> previously reported conditions and TDS concentrations. The TDS concentrations <br /> in well W-1 (2,360 mg/L) was the highest ever observed in this well. <br /> 3.2.2 Nitrogen <br /> Nitrate NO3): Second Quarter 2010 NO3 concentrations in the nine WWTF <br /> monitoring well samples ranged from below detection to 61 mg/L. Figure 6 shows <br /> NO3 isoconcentration lines constructed from the Second Quarter 2010 well water <br /> sample results. The NO3 concentrations are highest in groundwater located up- <br /> gradient of the storage ponds (Figure 6). The NO3 concentration in well KMW-3 <br /> (14.3 mg/L) was the highest ever observed in this well. The NO3 concentrations in <br /> all other wells were within the historical range of observations. <br /> - 16 - <br />