Dames & Moore, 1999 - USDA Forest Service

December 1 1, 1998
Sediment Data, Fall 1998, Holden Minc
Page 4
2. Initial Calibration - Acceptable
3.
Applicable to AVS and TOC analyses only.
' Continuing Calibration - Acceptable
Applicable to AVS and TOC analyses only.
4. Blanks - Acceptable
5. Laboratory Control Sample (LCS) - Acceptable
Applicable to pH, AVS, and TOC analyses only.
6. Laboratory Sample Duplicate - Acceptable . .
Per PSEP guidelines for grain size analysis, one sample was analyzed in triplicate.
7. Field Duplicate - Acceptable
Field replicates were collected and labeled LUC-SED-101598-1A; -1 B, and -1 C. Results
indicate that total solids are similar. TOC, N S, AVS, and pH results indicate variability. The results did
not indicate variability related specifically to a sample but variability by analytical method from sample to
sample. It appears that the variability is not due to sampling technique but specifically to individual
sample content. Data were not qualified based on field replicate results.
8. Matrix Spike (MS) -Acceptable
Applicable to AVS and TOC analyses only.
9. Detection Limits - Acceptable
10. Type of Review - Summary
1 1. Overall Assessment of Data
The u.sefulness 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.
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 quantitation 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..
DAMES & MOORE