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All concentrations are provided in ug/L. <br />MDL - Method Detection Limit from current laboratory analytical report. <br />CLGB - Concentration Limit Greater Than Background (Impact Constituents only). See Table 5-12 of Revised Post -Closure Maintenance Plan (11/2/94). <br />BL - Background Limit. Determined from historical data at MW -20 and MW -23R. (Mean + [2.375 x Standard Deviation]) <br />PQL - Practical Quantitation Limit from current laboratory report. <br />ND - Ethanol was reported by the laboratory as a tentatively identified compound (TIC). PQL and MDL are not provided in the lab report. <br />0.75 - November 2011 concentration exceeds the CLGB, BL, or PQL. <br />- No historical detections above the PQL in background wells. Background limit is equal to the PQL. <br />- Constituent concentration is between the MDL and PQL. <br />0 Page 0 <br />ri <br />tST & ASSOC 0S, INC.F <br />