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Dames & Moore, 1999 - USDA Forest Service

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TABLE 7.2.2-1C =b<br />

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

(BASED ON SAMPLES COLLECTED FROM 1991-1997, EXCLUDES USGS SEDIMENT 8 CONCENTRATE DATA AND FLOCCULENT DATA)<br />

HOLDEN MINE RUFS<br />

DAMES 6 MOORE JOB NO. 17693005019<br />

Statistical Notes: {Statlslcal calculat~ons were performed uslng Washington Department of Ecology's MTCAStat Excel V 5 Macro (Module 2 1). downloaded born thelr web slte )<br />

Maxlmum and rnlnmum concentrations are based on detected values only<br />

Range of reporting llm~ts (RL) are based on resufis reported as not detected<br />

Dlstnbutlon a determined based on the MTCA stat program by analyzing the data through the "W-Test' or 'O'Agost~no's test"<br />

Where data IS not lognormally nor normally dlstnbuted, the d~stnbut~on a noted as -Ne~ther"<br />

When approxlrnate dtstrlbutlon IS reported as 'ne~thef, the maxlrnum concentrat~on IS reported as the 95% UCL and IS presented In BOLD font<br />

The mean IS an anthrnet~c mean ~f data are normally dlstr~buted or ~f dlstnbut~on a lndlcated as 'Ne~thef The reported mean for lognormally dlstrlbuted data 1s a lognormal mean<br />

Stat~stical analps was not performed on data sets where 50% or greater of the results were reported as not detected Only rnaxlrnum and mlnlrnurn concenlrat~ons are reported. I appltcable<br />

For these data Sets a calculated rnedlan IS based on detected values only<br />

H.\Holden\Drafl final ri rpl\S_7\eco raUables\7-2-2-1 -c.xls<br />

7/26/99<br />

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