Dames & Moore, 1999 - USDA Forest Service

Date:
To:
From:
Subject:
June 25, 1998
Rik Langendoen, Project Manager
Karen Mixon, Project Chemist $!
Summary Data Quality Review
Holden Mine Remedial Investigation Phase Ill
Ventilator Portal Sample, June 1998
Dames & Moore Job #17693-005-019
The summary data quality review of one sample collected on June 14, 1998 has been completed.
The sample was analyzed at the Analytical Resources, Incorporated (ARI) laboratory in Seattle,
Washington for total recoverable and dissolved metals by EPA Methods 6010A and 200.8 modified
(including the following metals: aluminum, arsenic, barium, beryllium, cadmium, calcium, chromium,
copper, iron, lead, magnesium, manganese, molybdenum, nickel, potassium, silver, sodium, and zinc).
The analyses were performed in accordance with the methods specified in EPA Test Methods for
Evaluating Solid Waste, SW-846, January 1995. A validation package containing method associated
QAJQC data and summarized sample data was provided by the laboratory. The following sample is
associated with laboratory work order ARI# W676:
.a
Sample I.D. ARI Sample # Analvses Requested
; -,. ,... .i "P-1
W676A Dissolved Metals
. j.
VP-1 W676B Total Metals
The following comments refer to ARl's performance in meeting quality control specifications
described in the EPA documents "EPA Test Methods for Evaluating Solid Waste, SW-846", January 1995
and "USEPA Contract Laboratory Program (CLP) National Functional Guidelines for Inorganic Data
Review", February 1994, and the Quality Assurance Project Plan (QAPP) prepared for the Phase Ill
Remedial lnvestigation dated April 17, 1998.
The sample was prepared in the laboratory using EPA Method 3005A and a modified EPA 200.8
preparation method. Samples were analyzed by ICP (EPA Method 6010A) and ICPMS (EPA Method
200.8 Modified).
1. Holding Time - Acceptable
2. Tunes (ICP MS analysis only) - Acceptable
3. Initial Calibration - Acceptable
4. Continuing Calibration - Acceptable .
5. Blanks
Copper (0.2 ug/L), manganese (0.04 ug/L), and sodium (60 ug/L) were detected in the method
blank associated with sample VP-1 (total and dissolved analyses). As the concentrations detected were
at or near the detection limit. sample results in VP-1 (total and dissolved) that are less than 5X the