Dames & Moore, 1999 - USDA Forest Service

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Rosa Environmental & Geotechnical Laboratory, LLC
Client: Dames & Moore REGL Project No.: 1000-1 21
Client Project No.: 17693-005-01 9 Sample Batch No.: 1000-1 21-01
Case Narrative
400 Ninth Avenue N., Suite B
Seattle, WA 98 109-5 187
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1 The samples were received on October 19, 1998 and were in good condition.
2. There were eighteen samples for PSEP grain size analysis. A triplicate was run on one
sample.
3. The samples were set-up for testing on October 21, 1998. The analysis was complete on
October 27, 1998.
4. PSEP methodology requires that there be between 5 and 25 g in the pipehe portion of the
analysis. The method also requires that all weights be measured to the nearest 0.1 mg, which
limits the size of the test portion to 205 g. In most cases, a test.portion that would meet the 5
g limit is too large to weigh on the analytical balance. Many of the samples reported in this
set'contained less than the 5 g limit. The analysis was run anyway and the data has been
flagged (noted in italicslshading in the summary table). Because of the lack of fines in these
samples, the amount retained in many of the individual size fractions was less than the
detection limit. These samples have been reported as 'NA" in the table, and were shown in
the plots as "0.0."
5. Each. bench sheet lists a simple sieve bydeve visual observation of the amount of organic
material contained in each sample. All but one sample have similar organic characteristics;
generally, organic material accounts for all weights from the #120 sieve and larger. The
exception is sample LUC-SED-101598-1-1 which contained only 2 pine needles in the #I8
all shiny flecks (mica?). -
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