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i <br /> •a <br /> Table 4 EMCON Associates <br /> Project 939-02.31 <br /> TOLERANCE INTERVALS FOR S-1 AND S-2 12/2/91 <br /> Number of Mean, Standard Tolerance Lower I oierance Upper Tolerance <br /> Parameter: m I, unless noted Samples, N x Deviation, s Factor, K Limit Limit <br /> Chloride 24 24 18 2.309 NA 66 <br /> Nitrate-Nitrogen 24 NE NE 2.309 NA 0.5' <br /> Total Dissolved Solids 24 294 95 2.309 NA 513 <br /> Adak <br /> Sulfate 24 NE NE 2.309 NA 40' <br /> Total Organic Carbon 24 42.3 58.7 2.309 NA 177.8 <br /> Hardness,Total 24 127 36 2.309 NA 210 <br /> pH (units) 22 7.29 0.44 2.697 6.1 8.48 <br /> Electrical conductivity (umhos/cm) 24 405 129 2.309 NA 703 <br /> Iron, Dissolved 24 1.29 1.06 2.309 NA 3.74 <br /> Manganese,Total 24 0.13 0.17 2.309 NA 0.52 <br /> NE= not established. There are insufficient detected values to calculate tolerance interval. <br /> NA= not applicable <br /> In calculating tolerance limits, results below detection limits were assigned values equal to half the detection limit. <br /> Proposed WOPS is 5 times the detection limit <br />