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Dames & Moore, 1999 - USDA Forest Service

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MEMORANDUM<br />

Date:<br />

July 2,<strong>1999</strong><br />

To: Rik Langendoen, Project Manager<br />

From: Karen Mixon, QAIQC Manager<br />

Subject: Summary Data Quality Review<br />

Holden Mine Remedial Investigation Phase Ill<br />

Sediment Data, Fall 1998<br />

<strong>Dames</strong> & <strong>Moore</strong> Job #17693-005-019<br />

The summary data quality review of one sediment sample collected on October 15, 1998 has<br />

been completed. A reanalysis of this sample was requested by <strong>Dames</strong> & <strong>Moore</strong> to confirm original<br />

sample results. The sample was analyzed at the Analytical Resources, Incorporated (ARI) laboratory in<br />

Seattle, Washington for metals by €PA Methods 6010A and 200.8 modified' (including the following<br />

metals: aluminum, arsenic, cadmium, copper, iron, lead, manganese, and zinc). The analyses were<br />

performed in accordance with the methods specified in EPA Test Methods for Evaluating Solid Waste,<br />

SW-846, January 1995. The laboratory provided a validation package containing method associated<br />

QAIQC data as well as sample data. The following sample is associated with laboratory work order ARI#<br />

AB35:<br />

Sam~le I.D. ARI Sample #<br />

The following comments refer to ARl's performance in meeting quality control specifications<br />

described in the EPA documents "EPA Test Methods for Evaluating Solid Waste, SW-846", January 1995,<br />

and "USEPA Contract Laboratory Program (CLP) National Functional Guidelines for Inorganic Data<br />

Reviewn, February 1994. Data were also reviewed in reference to the Quality Assurance Project Plan<br />

(QAPP) prepared for the Phase Ill Remedial lnvestigation referenced in addendum (August 28, 1998) to<br />

the Sampling and Analysis Plan.<br />

1. Holding Time - Acceptable<br />

2. Tunes (ICP MS analysis only) - Acceptable<br />

3. Initial Calibration - Acceptable<br />

4. Continuing Calibration - Acceptable<br />

5. Blanks - Acceptable<br />

6. Internal Standards (ICP MS analysis only) -Acceptable<br />

7. ICP Interference Check (ICP analysis only) - Acceptable<br />

8. Laboratory Control Sample (LCS) - Acceptable<br />

A standard reference material (SRM) was analyzed in lieu of a typical LCS.<br />

HOLDEM^ EM^ 998 effort\Data valid\ValAB35.DOC DAMES & MOORE

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