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Table 2 EMCON Concentration Limits, MW-4 Project 939-03.18 Corral Hollow Sanitary Landfill 1st Quarter, 1995 Number of Mean, Standard Tolerance Lower Tolerance Upper Tolerance Samples, N x Deviation, s Factor, K Limit Limit Metals(mg/1) Aluminum, Dissolved 6 0.906 2.15 NA NA 0.05 [1] Antimony, Dissolved 7 0.034 0.033 NA NA 0.1 [1] Arsenic, Dissolved 7 0.005 0.005 NA NA 0.005[1] Barium, Dissolved 3 0.041 0.001 NA NA NA[2] Beryllium, Dissolved 3 0.003 0.002 NA NA NA[2] Boron, Dissolved 2 3.78 0.177 NA NA NA[2] Cadmium, Dissolved 7 0.003 0.002 NA NA 0.01[1] Chromium,Total Dissolved 7 0.014 0.020 NA NA 0.02[1] Chromium Hexavalent 5 0.005 0.001 NA NA 0.0115[1] Cobalt, Dissolved 3 0.006 0.004 NA NA NA[2] Copper, Dissolved 7 0.011 0.011 NA NA 0.005[1] Iron, Dissolved 21 0.930 2.666 2.371 NA 7.25 Lead, Dissolved 7 0.019 0.036 NA NA 0.005[1] Manganese, Dissolved 7 0.339 0.614 NA NA 0.005 [1] Mercury, Dissolved 7 0.00028 0.00015 NA NA 0.0005 [1] Nickel, Dissolved 7 0.008 0.008 NA NA 0.095[1] Selenium, Dissolved 7 0.007 0.012 NA NA 0.01 [1] Silver, Dissolved 7 0.005 0.003 NA NA 0.01 [1] Thallium, Dissolved 7 0.059 0.101 NA NA 0.005[1] Tin, Dissolved 3 0.028 0.021 NA NA NA[2] Vanadium, Dissolved 3 0.006 0.004 NA NA NA[2] Zinc, Dissolved[3] 7 -3.97 1.52 3.399 NA 3.35 NA=not applicable [1]=The upper tolerance limit was set at five times the method detection limit due to an insufficient number of detected values. [2]=Tolerance limits will be established following the attainment of four quarters of data. [3]=The W-test indicated that the analytical data for this parameter is lognormally distributed;the tolerance limit was set using lognormal data. In calculating tolerance limits, results below method detection limits were assigned values equal to half the method detection limit and "trace"values were assigned values equal to half the practical quanititation limit plus half the method detection limit. H:\exce1\corral\CAPMW-4.XLS Date Printed:4/21/95