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Dames & Moore, 1999 - USDA Forest Service

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Decc~nbcr 8, 1998<br />

Background Soil Data, Fall 1998, Holden Mine<br />

Page 2<br />

Samples were prepared in the laboratory using EPA Methods 3050, 7060, 7841, and 200.8 as<br />

appropriate. Samples were analyzed by ICP (EPA Method 6010A), GFAA (€PA 7000 series), and ICP<br />

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 />

Barium (1.1 uglL) was detected in the continuing calibration blank (CCB) analyzed prior to<br />

samples DMBG-1, DMBG-2, DMBG-3; DMBG-4, DMBG-5, DMBG-7, DMBG-8, and DMBG-9. This CCB<br />

was analyzed after samples DMBG-10, DMBG-IOX, and DMBG-6. Aluminum (21.3 ug1L) was detected<br />

in the CCB analyzed after samples DMBG-1, DMBG-2, DMBG-3, DMBG-4, DMBG-5, DMBG-7, DMBG-<br />

8, and DMBG-9. Aluminum (23.4 ugf),.calcium (39.2 ugIL), copper (3.2 ugIL), magnesium (29.9 ug/L)<br />

and zinc (5.6 uglL) were detected in the ending CCB associated with samples DMBG-1, DMBG-2,<br />

DMBG-3, DMBG-4, DMBG-5, DMBG-6, DMBG-7, DMBG-8, DMBG-9, DMBG-10, and DMBG-1OX. As<br />

the concentrations of metals detected in the CCBs were substantially lower (minimum of 10X) than the<br />

concentration of metals detected in the associated samples, data were not qualified.<br />

Calcium (25.8 ug1L to 44.2 ug1L) was detected in the CCBs associated with samples DMBG-11,<br />

DMBG-12, DMBG-13, DMBG-14, DMBG-15, DMBG-16. DMBG-17, DMBG-18, and DMBG-19.<br />

Aluminum (25.6 ug1L) and manganese (1.8 uglL) were detected in the CCB analyzed prior to samples ,<br />

DMBG-14, DMBG-15, DMBG-16, and DMBG-19. As the aluminum, calcium, and manganese<br />

concentrations detected in the CCBs were substantially lower (minimum of 10X) than the concentration<br />

of metals detected in the associated samples, data were not qualified.<br />

Aluminum (4 mglkg), barium (0.1 mglkg), calcium (3 mglkg), sodium (18 mglkg), and zinc (0.5<br />

mglkg) were detected in the method blank associated with samples DMBG-10, DMBG-IOX, DMBG-6,<br />

DMBG-5, DMBG-7, DMBG-4, DMBG-3, DMBG-8, DMBG-2, DMBG-1, and DMBG-9. Concentrations of<br />

these metals in the samples were greater than 10X the concentrations detected in the method blank.<br />

Data were not qualified.<br />

Calcium (7 mglkg) was detected. in the .method blank associated with samples DMBG-11,<br />

DMBG-12, DMBG-13, DMBG-14, DMBG-15, DMBG-16, DMBG-17, DMBG-18, and DMBG-19. Sample<br />

results for calcium reported in associated samples were greater than 10X the method blank<br />

concentration. Data were not qualified.<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. Aluminum recovery<br />

(127%) in the SRM associated with samples DMBG-1, DMBG-2, DMBG-3, DMBG-4, DMBG-5, DMBG-6,<br />

DMBG-7, DMBG-8, DMBG-9, DMBG-10, and DMBG-1OX was above the typical LCS control limits of 80<br />

to 120%. However, the recovery was within the advisory range published by the supplier. Calcium<br />

DAMES 81 MOORE

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