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TABLE A-HISTORIC GROUNDWATER MONITORING DATA <br /> DTW GWE TKN Nitrate as N Ammonia as N <br /> Detection Limits—, 0.5 0.5 0.5 <br /> Units—, mg/L mg/L mg/L <br /> MCL—, no limit 10 no limit <br /> Well I.D. Date Feet Feet <br /> TOC Elev. <br /> it- <br /> MW-1 proposed <br /> 5 <br /> MW-2 proposed <br /> 5 <br /> MW-3 proposed <br /> 5 <br /> B23/GW1 8/23/2013 10.9 0.441 69.0 0.13 <br /> B22/GW2 8/23/2013 9.1 ND 15.9 0.10 <br /> B21/GW3 8/23/2013 5.85 ND 219 0.34 <br /> B25/GW4 8/23/2013 dry at 16 <br /> B27/GW5 8/23/2013 dry at 12 <br /> Notes: <br /> MCL=California Maximum Contaminent Level for drinking water <br /> Top of casing elevations(feet)are referenced to NAVD88 vertical datum <br /> DTW=depth to water(feet) <br /> GWE=groundwater elevation(feet) <br /> NA=not analyzed • <br /> NS=not sampled <br /> X:Troject\6000_pq\6847 Raymond Investments-Helena Chemical\Reports\Work Plan\201406I5-6847 data.zlsx <br />