Dames & Moore, 1999 - USDA Forest Service

a,, MEMORANDUM
Date: June 8,1998
To: Rik Langendoen, Project Manager
From:
Subject:
Karen Mixon,. Project Chemist %r(\
Summary Data Quality Review
Holden Mine Remedial Investigation Phase Ill
Equipment Blank, May 1998
Dames & Moore Job #17693-005-019
The summary data quality review of one equipment blank collected on May 5, 1998 has been
completed. The sample was analyzed at the Analytical Resources, Incorporated (ARI) laboratory in
Seattle, Washington for total recoverable 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 W QC data
and summarized sample data was provided by the laboratory. The following sample Is associated with
laboratory work order ARI# W263:
Sam~le I.D. ARI Sample # Analyses Reauested
EB-05-PM W263A Total Metals
The following comments refer to ARlSs performance in meeting quality control specifications
descn'bed in the EPA documents 'EPA Test Methods for Evaluating Solid Waste, SW-846", January
1995 and 'USEPA Contrad Laboratory Program (CLP) National Functional Guidelines for Inorganic
Data RevieM, February 1994, and the Quality Assurance Project Plan (QAPP) prepared for the Phase
Ill Remedial Investigation 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
Aluminum (20 ugk), barium (0.04 ug/L), calcium (50 ug/L), lead (0.3 ug/L), and manganese
(0.07 ug/L) were detected in the method blank associated with sample EB-OSPM. As the concentrations
detected were at or near the detection limit, sample results in EB-OSPM that are less than 5X the
concentration in the blank are qualified as not detected and flagged 'U' accordingly. Results between 5X
and 10X the concentrations detected in the method blank are qualified as estimated and flagged 'J"