13.01.2013 Views

Dames & Moore, 1999 - USDA Forest Service

Dames & Moore, 1999 - USDA Forest Service

Dames & Moore, 1999 - USDA Forest Service

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Data collected from upstream stations in Railroad Creek were compiled with data collected fiom other<br />

tributaries unaffected by the mine to assess area background surface water quality. The water quality data<br />

from Railroad Creek stations adjacent to and downstream of the Holden Mine were compared to WQC for<br />

Washington state using actual hardness values as prescribed in the state regulation and to federal WQC<br />

using a minimum hardness of 25 ppm or actual hardness if greater than 25 ppm. The results of the<br />

comparisons are tabulated below.<br />

Listed below are the dissolved metals that were above the State of Washington AWQC and CWQC, which<br />

are based on actual hardness values during the RI sampling events in 1997 and 1998.<br />

Station1<br />

April 1997<br />

>AWOC/>CWQC<br />

MayIJune 1997<br />

>AWOCI>CWQC<br />

1 >AWOCPCWgC 1 ,<br />

RC-4 I Cu W Cu Zn<br />

RC-7 (Fe) ZdCd Zn<br />

I Cd . Cu. . ZnlCd . Cu . Pb, . Zn l Cu Zn*/Cu . Pb. . Zn* I<br />

Cd, Cu, WCd Cu, Pb. Zn Cw Zn*/Cu, Pb. Zn*<br />

NoneJPb<br />

(Fe) NonelPb<br />

I Cd , Cu. . Zn/Cd Cu. Zn<br />

Cd, Cu, ZdCd, Cu. Zn<br />

RC-2 (Fe) WCd, Zn Cd, Cu, ZdCd, Cy Zn Cu, Zn*/Cu, Zn* (Fe) WZn C4 Cu. Zn/Cd, Cu, Zn<br />

RC-5 (Fe) Zn/Cd, Zn Cd, Cu, zn/Cd, Cu, Zn Cu, Zn*/Cu, Zn* (Fe) WZn Cd, Cu. ZdCd, Cu. Zn<br />

RC-I0 Not Sampled Not Sampled<br />

Not Sampled<br />

None Cu ZdCd, Cu, Zn<br />

RC-8 None<br />

Not Sampled<br />

Not Sampled CdICd, Pb Not Sampled<br />

RC-3 NondZn* Cu, Zn*/Cu, Zn*<br />

None<br />

None<br />

Cu WCu, Zn<br />

' South bank samples not included<br />

(Fe) - lron criteria is not designated as AWQC or CWQC. If (Fe) is listed, it means the sample result was above the iron criteria of<br />

1000 p a.<br />

Listed below are the dissolved metals above federal AWQC and CWQC that use minimum hardness value<br />

of 25 ppm where actual hardness was below 25 ppm.<br />

b<br />

Station'<br />

RC-4<br />

KC-7<br />

RC-2<br />

KC-5<br />

RC- I0<br />

KC-8<br />

RC-3<br />

April 1997<br />

>AWQCl>cWQC<br />

Cu Zd Cu, Zn<br />

(Fe) ZdCd,Zn<br />

(Fe) ZdCd,Zn<br />

(Fe) ZdCd,Zn<br />

Not Sampled<br />

None<br />

NoneJZn*<br />

' South bank sarno%s not included<br />

MeyIJune 1997<br />

>AWQC/>CWQC<br />

Cu, ZdCd, Cu, Pb, Zn<br />

Cu, ZnICd, Cu, Zn<br />

Cu, ZnICd, Cu, Zn<br />

Cu, WCd, Cu. Zn<br />

Not Sampled<br />

Not Sampled<br />

Cu, Zn*/Cu. Zn*<br />

July 1997<br />

>AWQC/>CWOC<br />

(Fe) - lron criteria is not designated as AWQC or CWQC. If (Fe) is listed, it means the sample result was above the iron criteria of<br />

I000 p a.<br />

Where zinc is marked with an asterisk (Zn*) in the above tables, the exceedance of WQC could have been<br />

affected by the introduction of zinc during the field filtration process. Therefore, zinc concentrations at<br />

RC-3 and zinc concentrations detected in July 1997 should only be considered "apparent" exceedances.<br />

The cadmium concentrations shown for RC-8 in SeptemberlOctober 1997 are apparently an anomalous<br />

result, described previously in Section 5.3.3.4, and should not be considered an actual exceedance.<br />

G:\WPDATA\OOS\REPORTSWOLDEN-2W.da<br />

17693-005-019Uuly 28.<strong>1999</strong>;11:22 AM;DRAFT FWAL RI REPORT<br />

July 1997<br />

>AWQCXWQC<br />

None<br />

None<br />

None .<br />

None<br />

Not Sampled<br />

Not Sampled<br />

None<br />

SeptemberIOctober<br />

1997<br />

SeptemberlOctober<br />

1997<br />

>AWQCI>CWQC<br />

None<br />

(Fe)<br />

(Fe)<br />

(Fe)<br />

None<br />

CdICd<br />

None<br />

-<br />

May 1998 .<br />

>AWOC/2CWOC<br />

May 1998<br />

>AWQC/>cWQC<br />

Cu. ZnfCd, Cu, Zn<br />

Cu, ZnICd, Cu, Zn<br />

Cu, ZdCd. Cu, Zn '<br />

Cu. Zn.Cd, Cu, Zn<br />

Cu, ZnfCd, Cu. Zn<br />

Not Sampled<br />

Cu, ZnICu. Zn

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!