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Dames & Moore, 1999 - USDA Forest Service

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7<br />

MEMORANDUM<br />

Date:<br />

To:<br />

From:<br />

Subject:<br />

June 15,1998<br />

Rik Langendoen, Project Manager<br />

Karen Mixon, Project Chemist \@\<br />

Summary Data Quality Review<br />

Holden Mine Remedial lnvestigation Phase Ill<br />

Equipment Blank, May 1998<br />

<strong>Dames</strong> & <strong>Moore</strong> Job #I 7693-005-01 9<br />

The summary data quality review of two filter blanks and one bottle blank has been completed.<br />

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

Washington for total recoverable and dissolved metals by EPA Methods 6010A and 200.8 modified<br />

(Including the following metals: aluminum, arsenic, barium, beryllium, cadmium, calcium, chromium,<br />

copper, Iron, lead, magnesium, manganese, molybdenum, nickel, potassium, silver, sodium, and zinc).<br />

The analyses were performed in accordance with the methods specified in EPA Test Methods for<br />

Evaluating Solid Waste, SW-846, January 1995. A standard report containing summarized method<br />

associated QAIQC data and sample data was provided by the laboratory. The following samples are<br />

associated with laboratory work order ARI# W064:<br />

Sam~le 1.D. ARI Sam~le # Analyses Reauested<br />

Filter Blank #1 W064A<br />

Filter Blank #2 W064B<br />

Dissolved Metals<br />

Dissolved Metals<br />

Total Metals<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<br />

1995 and "USEPA Contract Laboratory Program (CLP) National Functional Guidelines for lnorganlc<br />

Data Review, Feb~ary 1994, and the Quality ,Assurance Project Plan (QAPP) prepared for the Phase<br />

Ill Remedial Investigation dated April 17, 1998.<br />

The sample was prepared in the laboratory using EPA Method 3005A and a modified EPA 200.8<br />

preparation method. Samples were analyzed by ICP (EPA Method 6010A) and ICPMS (EPA Method<br />

200.8 Modified).<br />

1. Holding Time - Acceptable<br />

2. Blanks<br />

Copper (0.3 ug/L), potassium (6 ugk), and sodium (30 ug/L) were deteded in the method blank<br />

associated with this sample set. As the concentrations detected were at or near the detection limit,<br />

associated sample results less than 5X the concentration in the blank are qualified as not detected and<br />

flagged 'U' accordingly. Results between 5X and 1OX the concentration detected .in the method blank<br />

are qualified as estimated and flagged 'J" accordingly. Results reported as not deteded or greater than<br />

1OX the concentration detected in the method blank do not require qualification.

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