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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 5<br />

10. Field Duplicate - Acceptable<br />

Sample RC-4X is the field duplicate of RC-4.<br />

11. Matrix Spike - Acceptable<br />

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

13. Detection Limits - Acceptable<br />

14. Type of Review - Standard<br />

15. Overall Assessment of Data<br />

The usefulness of the data is based .on EPA guidance documents listed above. Upon<br />

consideration of the information presented above, the data are acceptable except where flagged with data<br />

qualifiers that modify the usefulness of the individual values.<br />

Conventional Analvses<br />

Samples were analyzed for total dissolved solids (TDS), total suspended solids (TSS), alkalinity,<br />

and sulfate by EPA or other methods identified in the introduction of this report. In addition, hardness was<br />

determined by calculation from dissolved metals analysis and reviewed for correctness.<br />

@ 1. Hold Time - Acceptable<br />

2. . Initial Calibration - Acceptable<br />

Applicable for alkalinity and sulfate.<br />

3. Continuing Calibration - Acceptable<br />

.Applicable for alkalinity and sulfate.<br />

4. Blanks - Acceptable<br />

5. Laboratory Control Sample - Acceptsble<br />

Applicable for alkalinity. A standard reference material (SRM) was used to evaluate sulfate.<br />

Results were acceptable.<br />

6. Laboratory Sample Duplicate - Acceptable<br />

7. Field Duplicate - Acceptable<br />

Sample RCdX is the field duplicate of sample RC-4.<br />

8. Matrix Spike (MS) -'Acceptable<br />

Applicable for sulfate.

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