Dames & Moore, 1999 - USDA Forest Service

TABLE 7.14
COMPARISON OF SEDIMENTARY TOTAL METAL CONCENTRATIONS FROM RAILROAD CREEK
(BASED ON SAMPLES COLLECTED FROM 1991-1997)
HOLDEN MINE RUFS
DAMES & WORE JOB NO. 17693-005-019
Data Notes:
J - Estimated value.
U - Parameter was analyzed for, but not detected above the reporting limit shown.
UJ - Parameter was analyzed for but not detected. Detection ltmit is an estimated value.
~~@~&&-$j#.~
>:s:
. . . . . . . . . . . . . . . . . . ., . . . . indicates the concentration of analyte was not established, therefore not reported nor analyzed.
Data Source:
(a) Kilburn. et al. 1994. Geochem~cal data and sample locality maps lor sfream-sediment, heavy-mineralconcentmfe, mill tarlinp, wafer, and pmrprlate samples cdlecfed
in and around the HoMen mine. Chelan County. WaShinpl~. USGS Open File Report 94-680A Paper Version. 94-6808 Diskette version (Data Collected in 1994)
(b) Lambeth. R.H. 1995. Transmittal of laboratory data from samples collected at Holden Mine site by the US Bureau of Mines.
(c) Johnson. A,. el al 1997 Effects of Holden Mine on the Wafer. Sediments and Benthic tnveriebrafes of Railroad Creek (Lake Chelan).
Environmental Investigations and Laboratory Services Program Water Body No. WA-47-1020. Publication No 97-330 (data collected in Spring and Fall 1996)
Statistical Notes: (Slatisical calculations were performed using Washington Departmerit of ~cology's MTCAStit Excel V.5 Macro (Module 2.1). downloaded from their web site )
Madmum and minimum concentrations are based on detected values only.
Range of reporting limits (RL) are based on resuns reported as not detected.
Distribution is determined based on the MTCA stat prcgram by analyzing the data through the W-Ted' or D'Agostino's test. Where data is not lognormally nor normally d~stributed, the distr~but~on is noted as -lJedhef
When approximate distribution is reported as 'neithef. the madmum concentration is reported as the 95% UCL and is prented in BOLD font.
If UCL is reported in brackets (UCL}. this indicates that the calculated result from MTCAStat was reported to be unusually high Therefore. the calculated 95% UCL IS suspect.
The mean is an arithmetic mean if data are normally distributed or tfdistnbution is indicated as 'Neither. The reported mean for lognormally distributed data is a lognormal mean
Statistical analysis was not performed on data sets where 50% or greater of the resuits were reported as not detected Only maximum and minimum concentrations are reported, d applicable
For these data sets, a calculated median is based on detected values only.
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