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Mercury Data for Water and Sediment from the Dutch Flat Mining District, California

PRELIMINARY DATA--SUBJECT TO REVISION

Results of mercury analysis for water samples from the Dutch Flat mining district, California

[conc., concentration; ng, nanogram; L, liter; s.d., standard deviation; na, not applicable]
[Replicate notation: 1/ 1, individual sample (no replicate); 1/2, first of two replicates; 2/2, second of two replicates]

  Mercury  
Sample UNFILTERED WATER FILTERED WATER  
Location conc. s.d. conc. s.d.  
(see map) Comments Date Time Replicate ng/L ng/L ng/L ng/L Laboratory1
 
POLAR STAR TUNNEL
PS1 after disturbance 18-Jul-98 1015 1/1 10,400 na 225 na A
PS1   11-Aug-98 1024 1/1 148 na 63 na A
PS2   11-Aug-98 1125 1/1 98 na 45 na A
PS1   7-May-99 0930 1/2 792 49 19.2 0.6 B
PS1   7-May-99 0930 2/2 663 17 20.3 0.1 B
PS3   7-May-99 1030 1/2 321 25 6.6 0.5 B
PS3   7-May-99 1030 2/2 96 1 7.6 0 B
PS4   7-May-99 1330 1/2 14 1 1.5 0.2 B
PS4   7-May-99 1330 2/2 69 4 1.6 0.2 B
PS1 after disturbance 7-May-99 1300 1/2 9,300 400 51.5 0.4 B
PS1 after distrubance 7-May-99 1300 2/2 9,600 600 44.2 0.4 B
PS1   27-May-99 1030 1/2 1,330 7 58.4 0.1 B
PS1   27-May-99 1030 2/2 905 5 58.7 0.1 B
 
SOUTHERN CROSS TUNNEL
SC1   11-Aug-98 1435 1/1 45 na 7.4 na A
SC2   27-May-99 1500 1/2 6.6 0.2 0.7 0.2 B
SC2   27-May-99 1500 2/2 7.3 0.8 0.7 0.2 B
 
1 Laboratories:
A. Frontier Geosciences, Seattle, WA
B. U.S. Geological Survey, Boulder, CO

Dutch Flat Mercury Data
Contact Charlie Alpers, cnalpers@usgs.gov, (916) 278-3134
Last Modified: Wed Jan 19, 2000

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