Dames & Moore, 1999 - USDA Forest Service

June 15, 1998
Surface Water, May 1998, Holden Mine
Page 6
9. Detection Limits - Acceptable
The detection limit for TSS reported for sample HC-4 was 2.2 mglL which is above the QAPP.
requirement of 1.0 mgIL. The increased detection limit was due to the use of reduced sample volume as
this sample was used for the laboratory duplicate analysis. Data usability is not affected.
10. Type of Review - Standard
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.
Orqanic Analvses
Select samples (as noted in the report introduction) were analyzed for TPH (gasoline range), and
TPH (diesel extended range) per the Ecology methods previously referenced.. ., :, ,.;
,,. ..
1. Hold Time - Acceptable
2. Initial Calibration - Acceptable
3. Continuing Calibration - Acceptable
4. Blanks - Acceptable
5. Surrogate Recoveries - Acceptable
6. Laboratory Duplicate
-. . . .. .
A lab duplicate was not performed for WTPH-G or WTPH-D extended as required by the method.
Data was not qualified based on the omission of a laboratory duplicate.
7. Matrix SpikeIMatrix Spike Duplicate (MSIMSD)
A MSIMSD was not performed. A MSIMSD is not required per the method.
8. Laboratory Control SamplelBlank Spike (LCSIBS) - Acceptable
9. Field Duplicate - Not applicable
10. Target Compound Identification - Acceptable
11. Detection Limits - Acceptable
12. Type of Review - Standard