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Dames & Moore, 1999 - USDA Forest Service

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June 8,1998<br />

Seep and Portal, May 1998, Holden Mine<br />

Page 2<br />

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

W222HM1222B (LIMS 989624) Dissolved Metals, alkalinity,<br />

TDSKSS, sulfate .<br />

Dissolved Metals, alkalinity,<br />

TDSTTSS, sulfate<br />

Dissolved Metals, alkalinity,<br />

TDSKSS, sulfate<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, 'Methods for Chemical Analysis of Water and Wastes', March 1983; and 'USEPA Contract<br />

Laboratory Program (CLP) National Functional Guidelines for Inorganic Data ,Review', February 1994,<br />

and Standard Methods for the Examination of Water and Wastewater, 18th Edition, 1992, and the<br />

Quality Assurance Project Plan (QAPP) prepared for the Phase Ill Remedial Investigation dated April<br />

17, 1998.<br />

The report is divided into subsections based on type of analyses performed.<br />

Total Recoverable and Dissolved'Metals<br />

Sample aliquots for dissolved metals were filtekd and prese~ed in the field. Sample aliquots<br />

for total recoverable metals were transferred to preserved containers in the field.<br />

Samples were prepared in the laboratory using EPA Method 3005A; EPA 7000 series methods,<br />

and a modified EPA 200.8 preparation method. Samples were analyzed by ICP (EPA Method 601 0A) ,<br />

GFAA (EPA Methods 7060,7131,7421,7761), and ICP MS (EPA Method 200.8 Modified).<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<br />

Lead (-1.0 ug/L) was detected in the continuing calibration blank (CCB) and ending CCB (-1.3<br />

ugk) analyzed on May 24, 1998. Samples analyzed and associated with these CCBs include P-1<br />

(dissolved), P-5 (dissolved), SP-23, and P-5 (total). As lead in all of these samples was not detected or '<br />

exceeded the concentration detected in the CCB, the impact of the CCB is considered minimal. Data<br />

were not qualified.<br />

Aluminum (30 ug/L) was detected in the method blank associated with the analysis of samp1es.P-<br />

5 (dissolved), SP-23, SP-2, SP-2X. SP-4, SP-1, and SP-27. Sample results for all samples were greater<br />

than 10X the method blank concentration with the exception of SP-27. The result for SP-27 is less than<br />

5X the method blank concentration and is qualified as not detected and flagged 'U' accordingly.

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