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Dames & Moore, 1999 - USDA Forest Service

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June 8, 1998<br />

Seep and Portal, May 1998, Holdcn Mine<br />

Page 3<br />

Cadmium (0.3 ug/L) was detected in the method blank associated with P-1 (total) and P-5 (total).<br />

As the concentration detected in the blank was at or near the detedion limit, sample results in associated<br />

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

accordingly. Results between 5X and 10X the concentration deteded in the method blank are qualified<br />

as estimated and flagged 'J' accordingly. Results reported as not deteded or greater than ?OX the<br />

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

Aluminum (20 ug/L) and lead (0.3 ug1L) were detected in the method blank.associated with the<br />

analysis'of samples VP-1 (total and dissolved) and CGD1. As the concentrations detected were at or<br />

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

the blank are qualified as not detected and flagged 'U' accordingly. Results between 5X and IOX the<br />

concentrations detected in the method blank are qualified as estimated and flagged 'J' accordingly.<br />

Results reported as not detected or greater than 10X the concentration detected'in the method blank do<br />

not require qualification.<br />

6. lntemal Standards (ICP MS analysis only) -Acceptable<br />

7. ICP Interference Check (ICP analysis only) -Acceptable<br />

8. Laboratory Control Sample - Acceptable<br />

9. Laboratory Duplicate Sample - ~cceptable<br />

10. Field Duplicate - Acceptable<br />

Sample SP-W is the.field duplicate of SP-2.<br />

11. Matrix Spike - Acceptable<br />

12. Graphite Fumace Atomic Absorption (GFAA) QC -Acceptable<br />

13. ICP Serial Dilution (ICP analysis only) - Acceptable<br />

14. Detection Limits<br />

The detection limits for beryllium, chromium, and molybdenum.were 2X the QAPP limits for<br />

samples SP-1, SP-2, and SP-2X due to necessary sample dilutions related to other analytes.<br />

The detection limit for lead was also raised 5X due to sample dilution. The detection limit for<br />

arsenic was raised 5X for sampies SP-2 and SP-W. The detection limit for nickel was raised<br />

W for sample SP-1. These metals were not considered compounds of concern at the Site; data<br />

usability was not affected.<br />

15. Type of Review<br />

A summary review was performed on ICP and ICP MS data. A standard review was performed<br />

on the G F data.<br />

~

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