Table 10. Concentrations (g/g) of Cr, Cu, Zn, As, and Pb determined for spiked soil matrices by response factor

Figure 2. Lead concentrations (g/g) established for spiked soils by both RF/Comp

Table 11. Concentrations (g/g) of Co, Ni, Hg, Tl, and Se determined for spiked soil matrices by response factor

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Table 10. Concentrations (g/g) of Cr, Cu, Zn, As, and Pb

determined for spiked soil matrices by response factor/

Compton Kα peak normalization.

Ft. Edwards Clay

CRREL Silty/Sand

Metal concentrations (g/g)

Rocky Mt. Arsenal

Material & spike

Tampa Bay Sediments

Lebanon Land fFlilll

Ft. Edwards clay

Treatment Level (g/g)

Ft. Edwards Clay

CRREL Silty/Sand

Rocky Mt. Arsenal

Tampa Bay Sediments

Lebanon Land filill

Rocky Mountain Arsenal

Treatment Level (g/g)

Tampa Bay sediments

Figure 3. Antimony concentrations (g/g) estab-

lished for spiked soils by both RF/Comp. Kα normal-

ization and FP analysis.

The remaining metals in this study, Ni, Co,

and Cr, required additional qualifications be-

Lebanon landfill soil

cause their estimates of detection precluded

some of the lower laboratory treatment levels.

For instance, Ni and Co could only be assessed

for spiked concentrations that were >205 ppm

(g/g), likewise Cr for concentrations >525 ppm

and >270 ppm for FP and the RF/Comp. Kα

* Average of 0 ppm and matrix subsamples subtracted

analysis, respectively. Values for all three of

these metals were established by both methods of

analysis that failed to meet the 50% concentra-

ods of analysis tended to establish high estimates

tion criterion. High concentration estimates tended

for Cr for soil matrices with low Fe content. Even

to be established for both Ni and Co by FP analy-

though this apparent matrix effect was not ad-

sis in soils with low Fe content (Table 14). In con-

equately handled by either of these two methods

of analysis to meet the 50% criterion consistently,

trast, low concentrations of these two metals were

established by RF/Comp. Kα normalization analy-

the appropriate concentration trends were estab-

sis when high levels of Fe were present. Both meth-

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