Dames & Moore, 1999 - USDA Forest Service
Dames & Moore, 1999 - USDA Forest Service Dames & Moore, 1999 - USDA Forest Service
June 8, 1998 Seep and Portal, May 1998, Holden Mine Page 4 16. Overall Assessment of Data The usefulness of the data is based on EPA guidance documents listed above. . Upon consideration of the information presented above, the data are acceptable except where flagged with data qualifiers that modify the usefulness of the individual values. Conventional Analvses Samples were analyzed for total dissolved solids (TDS), total suspended solids (TSS), alkalinity, and sulfate by EPA or other methods identified in the introduction of this report. In addition, hardness was determined by calculation from dissolved metals analysis and reviewed for correctness. 1. Hold Time - Acceptable - . . * < 2. 3. Initial Calibration - Acceptable Applicable for alkalinity and sulfate. Continuing Calibration - Acceptable Applicable for alkalinity and sulfate. 4. Blanks - Acceptable 5. Laboratory Control Sample - Acceptable I Applicable for alkalinity. A standard reference material (SRM) was used to evaluate sulfate. Results were acceptable. 6; Laboratory Sample Duplicate - Acceptable 7. Field Duplicate - Acceptable Sample SP-2X is the field duplicate of sample SP-2. 8. Matrix Spike (MS) - Acceptable Applicable for sulfate. 9. . Detection Limits - Acceptable The detection limit reported for sample HC-4 was 2.2 mg/L which is above the QAPP requirement of 1.0 mgA. The increased detection limit was due to the use of reduced sample volume as this sample was used for the laboratory duplicate analysis. 10. Type of Review - Summary
* Page June 8.1998 Seep &d Portal, May 1998, Holden Mine 5 11. Overall Assessment of Data The usefulness of the data is based on the EPA guidance documents listed above. Upon consideration of the information presented above, data are considered acceptable except where flagged with data qualifiers that modify the usefulness of the individual values. Data Qualifiers U . The analyte was analyzed for, but was not detected above the reported sample quantitation limit. J The analyte was positively identified; the associated numerical value is the approximate concentration of the analyte in the sample. UJ The analyte was not detected above the reported sample quantitati~n limit. However, the reported quantitation limit is approximate and may or may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample. R The sample results are rejected due to serious deficiencies In the ability to.analyze the sample and meet quality control criteria. The presence or absence of the analyte cannot be verified.
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* Page<br />
June 8.1998<br />
Seep &d Portal, May 1998, Holden Mine<br />
5<br />
11. Overall Assessment of Data<br />
The usefulness of the data is based on the EPA guidance documents listed above. Upon<br />
consideration of the information presented above, data are considered acceptable except where flagged<br />
with data qualifiers that modify the usefulness of the individual values.<br />
Data Qualifiers<br />
U . The analyte was analyzed for, but was not detected above the reported sample quantitation limit.<br />
J The analyte was positively identified; the associated numerical value is the approximate<br />
concentration of the analyte in the sample.<br />
UJ The analyte was not detected above the reported sample quantitati~n limit. However, the<br />
reported quantitation limit is approximate and may or may not represent the actual limit of<br />
quantitation necessary to accurately and precisely measure the analyte in the sample.<br />
R The sample results are rejected due to serious deficiencies In the ability to.analyze the sample<br />
and meet quality control criteria. The presence or absence of the analyte cannot be verified.