Scientific Investigations Report 2007–5164
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5164
Table 6. Total mass of sediment and percent of fine materials, and concentrations of DDT and metabolites, in infiltration bags deployed in the McKenzie River, Oregon, August 2003–July 2004.
[Infiltration bags that were not quantitatively retrieved are not shown, except where qualitative data on DDT and its metabolites are available. Abbreviations: mg/L, milligram per liter; mg, milligram; mm, millimeter; g, gram; μg/kg, microgram per kilogram; DDD, dichloro-diphenyl-dichloroethane; DDE, dichloro-diphenyl-dichloroethene; DDT, dichloro-diphenyl-trichloroethane; ND, Not Detected; MDL, method detection limit, defined by USEPA as “the minimum concentration of a substance that can be reported with 99 percent confidence that the analyte concentration is greater than zero” (40 CFR Part 136 appendix B); –, no data, <, less than]
| Station ID | Sample | Suspended-sediment concentration (mg/L) |
Total mass of sediment (g) |
Percent < 2 mm in trap |
Total fines (<0.063 mm) (g) |
Percent fines, by weight (<0.063 mm) |
DDT concentrations, in micrograms per kilogram |
|||
|---|---|---|---|---|---|---|---|---|---|---|
| p,p’ DDD |
p,p’ DDE |
p,p’ DDT |
Total DDT MDL |
|||||||
| MRBO | Surface | 1.4 | 43 | |||||||
| MRBO #1 | Trap 1 | 37,385 | 11.9 | 91 | .2 | ND | ND | ND | <3.42 | |
| MRBO #2 | Trap 2 | 43,609 | 9.5 | 93 | .2 | – | – | – | – | |
| Average | 40,497 | 10.7 | 92 | .2 | ||||||
| SD | 4,401.0 | 1.7 | .8 | .02 | ||||||
| SFCO | Surface | 0.8 | 25 | |||||||
| SFCO #1 | Trap 1 | 23,369 | 12.2 | 65 | .3 | ND | ND | ND | <6.86 | |
| CGRO | Surface | 1.6 | 75 | |||||||
| CGRO #1 | Trap 1 | 37,558 | 3.3 | 384 | 1.0 | 0.184 | 2.40 | ND | 1.53 | |
| CGRO #3 | Trap 3 (qualitative only) | – | – | 1.06 | 1.74 | ND | 1.47 | |||
| BLUE | Surface | 0.8 | 75 | |||||||
| BLUE #3 | Trap 3 | 26,355 | 6.2 | 415 | 1.2 | – | – | – | – | |
| VIDA | Surface | 0.6 | 33 | |||||||
| VIDA #1 | Trap 1 | 36,110 | 14.2 | 197 | .5 | – | – | – | – | |
| VIDA #2 | Trap 2 | 34,339 | 11.9 | 216 | .6 | ND | 1.93 | ND | <1.778 | |
| VIDA #3 | Trap 3 | 35,259 | 10.0 | 226 | .6 | – | – | – | – | |
| Average | 35,236 | 12.0 | 213 | .6 | ||||||
| SD | 885.7 | 2.1 | 15.2 | .1 | ||||||
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5164
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