Dames & Moore, 1999 - USDA Forest Service

TABLE 7.2.2-1A
STATISTICAL ANALYSIS AND COMPARISON OF SURFACE WATER DATA FROM RAILROAD CREEK, SOUTH BANK
(SAMPLES COLLECTED FROM SOUTH BANK UPSTREAM OF SITE, 1991 - 1997)
HOLDEN MINE RUFS
DAMES 8 MOORE JOB NO. 1769340WJ19
Parameters
Data Notes:
J - Estimated Value.
'U - Parameter was analyzed for, but not detected above the reporting l~mit shaum.
r. but not detected. Detect~on limit is an estimated value.
dicates the concentration of analyte was not established, therefore not reported nor analyzed
Data Source:
(a) Kilburn, et al. 1994. Gwchemical data and sample locahty maps for stream-sediment. heavy-mineral-concentrate. mill tailing, water. and precipitate samples collected
in and around the Holden mine. Chelan County. Washington USGS Open File Report 94-680A Paper Version. 94-6808 Diskette version (Data Collected in 1994).
(b) Kilburn. J.E. 8 S.J. Sutley. 1996. Characterization of acid mine drainage at the Holden mine. Chelan. Washington. USGS Open File Report 96-531. (Data collected in 1995)
(c) Kilburn. J.E. 8 S.J. Sutley. 1997. Analytical results and comparative overview of geochemical studies conducted at the Holden Mine. spring 1996.
USGS Open File Report 97-1 28 (Data collected in Spring 1996).
(d) Kilburn. J E. 8 S.J. Sutley. 1997. Preliminary data (no report attached. data collected in FaU 1996)
H.\Holden\Drafl final ri rpt\S_7\eco raUables\7-2-2-1-a.x(s
Tl?6/99
Page 1 of 3
TABLE 7.2.2-1A
STATISTICAL ANALYSIS B COMPARISON OF
SURFACE WATER DATA FROM SOUTHBANK OF RAILROAD CREEK
Statistical Notes: (Statisical calculations were performed using Washington Gepartment of Ecology's MTCAStat
Excel V 5 Macro (Module 2.1). downloaded from their web site.)
Maximum and minimum concentrations are based on detected values only. '
Range of reporting limrts (RL) are based on results reported as not detected
Distribution is determined based on the MTCA stat program by analyzing the data'through the 'W-Test' or 'DAgostino's test".
Where data is not lognormally nor normally distributed, the distribution is noted as 'Neither.
When approdrnate distribution is reported as 'ne~thef, the maximum concentratim is reported as the 95% UCL and is presented in BOLD font
The mean is an arithmetic mean if data are normally distributed or if distributiorjir. 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 thi results were reported as not detected.
Only maximum and minimum concentrations are reported, if applicable For tk& data sets. a calculated median is based on detected values only.