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Dames & Moore, 1999 - USDA Forest Service

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June 15, 1998<br />

Surface Water, May 1998, Holden Mine<br />

Page 3<br />

The report is divided into subsections based on type of analyses performed.<br />

Total Recoverable and Dissolved ~etals<br />

Sample aliquots for dissolved metals were filtered and preserved in the field. ,Sample aliquots for<br />

total recoverable metals were transferred to preserved containers in the field.<br />

Samples were prepared i;l the laboratory using EPA Method 3005A and a modified EPA 200.8<br />

preparation method with additional concentration steps where appropriate. Samples were analyzed by<br />

ICP (EPA Method 6010A) and ICP MS (EPA Method 200.8 Modified).<br />

1. Holding Time - Acceptable<br />

2. Tunes (ICP MS analysis only) - Acceptable<br />

3. Initial'Calibration - Acceptable<br />

4. Continuing Calibration - ~cceptable<br />

5. Blanks<br />

.", , .. :<br />

Aluminum (30.4 uglL), calcium (23.3 uglL), and mag'nesium.(29 uglL) were detected in the ending<br />

continuing calibration blank (CCB),analyzed on May 19, 1998. Samples were not analyzed between the<br />

previous CCB and the ending CCB. The detected metals in the.ending CCB do not indicate a carryover<br />

concern that affects sample results. Data was not qualified based on the CCB. ' :<br />

Aluminum (20 ug1L) and calcium (30 ug1L) were detected in the method blank associated with the<br />

total analysis of samples RC-1, RC-4, RC-4X, RC-7, RC-5, RC-10, RC-3, RC-2, HC-4, HC-3, HC-2, HC-1,<br />

RC-11, BIG-1, CC-1, CC-2, RC-6, and EB050298, EB050398, and EB050598. As the concentrations<br />

detected were at or near the detection limit, sample results in associated samples that are less than 5X<br />

the concentration in the blank are qualified as not detected and flagged "U" accordingly. Results between<br />

5X and ?OX the concentrations detected in the method blank are qualified as estimated and flagged "J"<br />

accordingly. Results reported as not detected or greater than 10X the concentration detected in the<br />

method blank do not require qualification.<br />

Barium (0.05 ug/L) and lead (0.4 uglL) were detected in the method blank associated with the total<br />

analysis of RC-1, RC-4, RC-4X, RC-7, RC-5, RC-10, RC-3, RC-2, HC-4, HC-3, HC-2, HC-1, .RC-11, BIG-<br />

1, CC-1, CC-2, and RC-6. Cadmium (0.1 1 uglL) was detected in the method blank associated with the<br />

total analysis of RC-1, RC-4, RCdX, RC-7, RC-5, RC-2, HC-4, HC-3, HC-2, HC-1, RC-11, BIG-1, CC-1,<br />

CC-2, and RC-6. Copper (0.3 ugIL) was detected in the method blank associated with the total analysis of<br />

RC-4, RC-4X, RC-7, RC-5. RC-10, RC-3, RC-2, HC-4, HC-3, HC-2,, HC-1, BIG-1, CC-1, and RC-6.<br />

Manganese (0.44 uglL) was detected in the method blank associated with the total analysis of RC-1, RC-<br />

4, RC-4X, RC-7, RC-5, RC-10, RC-3, RC-2, HC-2, CC-2, and RC-6. Sample results for barium, cadmium,<br />

copper, and lead were at or near the detection limit. These elements reported in associated samples that<br />

are less than 5X the concentration in the blank are qualified as not detected and flagged "U" accordingly.<br />

Results between 5X and 10X the concentrations detected in the method blank are qualified as estimated<br />

and' flagged "J" accordingly. Results reported as not detected or greater than 10X the concentration<br />

detected in the method blank do not require qualification.<br />

Manganese detected in the method blank was substantially above the detection limit. Associated<br />

samples with results less than 10X the method blank concentration were reprepped and reanalyzed.

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