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LFR Levine-Fricke Metals Results. Metals were not detected above maximum contaminant levels (MCLs) in samples collected from wells MW-5 and PW-1 after well development or from wells MW-1 through MW-5 during the second quarter 2003 sampling event. The metal concentrations reported for monitoring well samples are shown on Figure 4. Based on a comparison of groundwater quality data between the downgradient wells and the upgradient well located at the Site, the tire fire does not appear to have impacted groundwater quality beneath the Site. Zinc, a constituent of concern in the burn piles, was reported in groundwater samples collected from the five wells during the second quarter 2003 at very low concentrations ranging from 0.0040 mg/l (MW-2) to 0.055 mg/l (MW-5). Additionally, lead, another potential constituent of concern, exhibited concentrations in the groundwater samples ranging from 0.00008 (MW-4) to 0.00017 (MW-1 and MW-2). These concentrations of zinc and lead are significantly less than their respective MCLs. Field Parameters. Values of pH in groundwater samples collected from Site monitoring wells were neutral and ranged from 7.2 in well MW-3 to 7.4 in wells MW-1, MW-2, and MW-5. Concentrations of total dissolved solids (TDS) in the groundwater samples collected from site wells ranged from 623 mg/l in the sample collected from MW-1 to 1040 mg/l in the sample collected from MW-3. The secondary MCL for TDS is 500 mg/1. The sample collected from the upgradient well (MW-3) contains a higher concentration of TDS when compared to the downgradient site wells suggesting that the TDS concentrations detected are likely representative of background conditions. Turbidity concentrations measured in the field ranged from 81 NTUs in the sample collected from MW-1 to 99 NTUs in the sample collected from MW-2. Turbidity values for groundwater samples analyzed in the laboratory ranged from 898 NTUs in the sample collected from MW-4 to 3420 NTUs in the sample collected from MW-1. Turbidity will be measured in the field during the third quarter 2003 sampling event. Monitoring Parameters. As presented in Figure 5, concentrations of monitoring parameters in groundwater samples collected from the Site were generally consistent across the Site. Concentrations of total alkalinity ranged from 198 mg/l in the sample collected from monitoring well MW-1 to 316 mg/l in MW-3. Analytical results for specific conductance for Site monitoring wells ranged from 962 µmhos/cm (MW-2) to 1540 µmhos/cm (MW-3). Concentrations of nitrate detected in groundwater samples ranged from 0.74 mg/l in monitoring well MW-3 to 3.5 mg/l in monitoring well MW-2. Concentrations of sulfate in the groundwater samples ranged from 115 mg/l in the sample collected from MW-2 to 246 mg/l in the sample collected from MW-3. All samples collected were below the secondary MCL for sulfate of 250 mg/1. Total organic carbon was not analyzed during the second quarter 2003 sampling event. Page 6 TTF QMR Q2-03-FINAL(7-28-03):IEE