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Dames & Moore, 1999 - USDA Forest Service

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7<br />

TABLE 7.14)<br />

COMPARISON OF SEDIMENTARY TOTAL METAL CONCENTRATIONS FROM RAILROAD CREEK<br />

(BASED ON SAMPLES COLLECTED FROM 1991-1997)<br />

HOLDEN MINE RllFS<br />

DAMES 6 MOORE JOB NO. 17693-005-019<br />

Statistical Notes: (Statisical calculations were performed using Washington Department of Ecology's MTCAStat Excel V.5 Macro (Module 2 I), downloaded from their web sne )<br />

Maximum and minimum concentrations are based on detected values only.<br />

Range of reporting limlts (RL) are based on resuns reported as not detected.<br />

Distribution is determined based on the MTCA stat program by analyzing the data through the -W-Test' or D'Agostino's test. Where data is not lognormally nor normally distributed. the distribution is noted as 'N<br />

When approximate distribution is reported as 'neither, the maximum concentration is reported as the 95% UCL and is presented in BOLD font<br />

If UCL is reported in brackets (UCL), th~s indicates that the calculated resun from MTCAStat was reported to be unusually high. Therefore. the calculated 95% UCL n suspect<br />

The mean is an arithmetic mean if data are normally distnbuted or if distnbution is indicated as 'Neither. The reported mean for lognormally distributed data is a lognormal mean<br />

Statistical analysis was not performed on data sets where 50% or greater of the results were reported as not detected Only maximum and minimum concentrations are reported, if applicable<br />

For these data sets. a calculated median a based on detected values only.<br />

H:Wolden\DraR final ri rpt\S_7\Hhra\Tables\7-ld.xls<br />

7r20199

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