Revision History File

Publication Series and Series Number:  Scientific Investigations Report 2006-5245

Publication Title: Cadmium Risks to Freshwater Life: Derivation and Validation of Low-Effect Criteria Values using Laboratory and Field Studies

Publication Authorship:  Christopher A. Mebane

First Version and Date of First Release:  1.00  October 25, 2006

Current Version and Date of Current Release:  1.1   December 2006

Summary of Product Components

Component	Description	Last Revised in Pub Version	Date of Last Revision
Book	Cadmium Risks to Freshwater Life	1.1

Historical List of Revisions (latest revision first)

Version 1.1¾December 2006

Book—

This revision includes a correction to a chronic toxicity test value for mottled sculpin, Cottus bairdi. Because of the cumulative nature of the criteria calculations, this single correction changed the species mean chronic value for mottled sculpin from 1.22 µg/L to 0.84 µg/L cadmium, which changed the chronic genus sensitivity ranking of Cottus from 3^rd to 2^nd, which affected the estimate of the 5^th percentile of the species sensitivity distribution, which affected the intercept of the hardness-toxicity equation, and which changed the cadmium final chronic value from 0.40 µg/L to 0.39 µg/L. Revision details follow.

Page 1:  The eleventh sentence in paragraph 1: “The four most sensitive genera to chronic exposures were Hyalella (amphipod), Gammarus (amphipod), Cottus, and Salvelinus.” was replaced with: “The four most sensitive genera to chronic exposures were Hyalella (amphipod), Cottus, Gammarus (amphipod), and Salvelinus.”

Page 1: The last sentence in paragraph 1: “Likewise, the criterion continuous concentration (CCC, or “chronic” criterion) was calculated as 0.38 μg/L cadmium using the hardness-dependent equation CCC = (e^{(0.6247 x ln(hardness)-3.344)}) x (1.101672 – ((ln hardness) x 0.041838))).” Was replaced with:  “Likewise, the criterion continuous concentration (CCC, or “chronic” criterion) was calculated as 0.37 μg/L cadmium using the hardness-dependent equation CCC = (e^{(0.6247 x ln(hardness)-3.384)}) x (1.101672 – ((ln hardness) x 0.041838))).” 

Page 17: The last sentence in paragraph 6: “The second most sensitive genus value also was for an amphipod, Gammarus fasciatus, followed by sculpin, Cottus, and the trout Salvelinus (table 7).” was replaced with: “The second most sensitive genus value was for a sculpin, Cottus, followed by an amphipod, Gammarus fasciatus, and the trout Salvelinus (table 7).”

Page 22: The second sentence in paragraph 4: “Species mean ACRs were estimated for 17 species using 37 pairs of acute and chronic tests (table 6).” was replaced with: “Species mean ACRs were estimated for 17 species using 38 pairs of acute and chronic tests (table 6).”

Page 23: Table 6: Additional Cottus bairdi data was inserted below row 24. Row 26: values for “Cottus bairdi” were revised.

Page 24: Table 6—continued, row 6: values for “Aggregate (FAV to FCV ratio)^7” were revised. “Final ACR^8” value was revised.

Page 25: Table 7, Chronic ranking: Rankings 2 and 3 were reversed. The values for Cottus bairdi and Gammarus fasciatus were revised.

Page 28: Table 8, Final chronic value (FCV) section: Column headings GMAV (mg/L), ln GMAV, and (ln GMAV)², were changed to GMCV (mg/L), ln GMCV, and (ln GMCV)². Rankings 2 and 3 were reversed; values for Cottus (sculpin) and some values for Gammarus (amphipod) were revised. The GMCV “Sum” values were revised. The “Number of GMCVs” values were revised. “FCV” value was revised.

Page 29: Fifth paragraph, last sentence: “CCC (mg/L dissolved cadmium) = (e^{(0.6247 x ln(hardness)-3.344)}) x (1.101672 – ((ln hardness) x 0.041838)).” was changed to “CCC (mg/L dissolved cadmium) = (e^{(0.6247 x ln(hardness)-3.384)}) x (1.101672 – ((ln hardness) x 0.041838)).”

Page 30: Table 9, Chronic criteria derivation section: Values for “This report” in the “Criterion value” columns were revised.

Page 55: Third paragraph, ninth and tenth sentences: “Under moderate or weak density dependence, the computed extinction risks are lower than when density dependence is included in the model. When available data sets are insufficient for reconstructing reliable measurements of density dependence, conservative estimates of extinction probabilities can be made from models that simply omit density dependence (Ginzburg and others, 1990).” were changed to “Under moderate or weak density dependence, the computed extinction risks are lower when density dependence is included in the model. Therefore, when available data sets are insufficient for reconstructing reliable measurements of density dependence, conservative estimates of extinction probabilities can be made from models that simply omit density dependence (Ginzburg and others, 1990).”

Page 57: Figure 5: Three points were slightly moved and one error bar was stretched.

Figure 5 caption: The phrase “ranges of species values (horizontal lines)” was added.

Page 60: Figure 6: The vertical axis label was revised in the graph in the upper right corner.

Page 103: Table 16, test no. 21: Values were revised.