Carbaryl, Carbofuran, and Methomyl - National Marine Fisheries ...

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production represent the top three permitted sources of contaminants within the lower basin according to discharge volumes and concentrations (Rosetta and Borys 1996). Rosetta and Borys (1996) review of 1993 data indicate that 52% of the point source waste water discharge volume is from sewage treatment plants, 39% from paper and allied products, 5% from chemical and allied products, and 3% from primary metals. However, the paper and allied products industry are the primary sources of the suspended sediment load (71%). Additionally, 26% comes from sewage treatment plants and 1% is from the chemical and allied products industry. Nonpoint source discharges (urban stormwater runoff) account for significant pollutant loading to the lower basin, including most organics and over half of the metals. Although rural nonpoint sources contributions were not calculated, Rosetta and Borys (1996) surmised that in some areas and for some contaminants, rural areas may contribute a large portion of the load. This is particularly true for pesticide contamination in the upper river basin where agriculture is the predominant land use. Water quality has been reduced by phosphorus loads and decreased water clarity, primarily along the lower and middle sections of the Columbia River Estuary. Although sediment quality is generally very good, benthic indices have not been established within the estuary. Fish tissue contaminant loads (PCBs, DDT, DDD, DDE, and mercury) are high and present a persistent and long lasting effect on estuary biology. Health advisories have been recently issued for people eating fish in the area that contain high levels of dioxins, PCBs, and pesticides. Habitat Modification Basin wide, critical ecological connectivity (mainstem to tributaries and riparian floodplains) has been disconnected by dams and associated activities such as floodplain deforestation and urbanization. Dams have flooded historical spawning and rearing habitat with the creation of massive water storage reservoirs. More than 55% of the Columbia River Basin that was accessible to salmon and steelhead before 1939 has been blocked by large dams (NWPPC 1986). Construction of the Grand Coulee Dam blocked 1,000 miles (1,609 km) of habitat from migrating salmon and steelhead (Wydoski and 236
Whitney 1979). Similarly, over one third ( 2,000 km) of coho salmon habitat is no longer accessible (Good, Waples et al. 2005). The mainstem habitats of the lower Columbia and Willamette rivers have been reduced primarily to a single channel. As a result, floodplain area is reduced, off-channel habitat features have been eliminated or disconnected from the main channel, and the amount of LWD in the mainstem has been reduced. Remaining areas are affected by flow fluctuations associated with reservoir management for power generation, flood control, and irrigation. Overbank flow events, important to habitat diversity, have become rare as a result of controlling peak flows and associated revetments. Portions of the basin are also subject to impacts from cattle grazing and irrigation withdrawals. Consequently, estuary dynamics have changed substantially. Stream habitat degradation in Columbia Central Plateau is relatively high (Williamson, Munn et al. 1998). In the most recent NAWQA survey, a total of 16 sites were evaluated - all of which showed signs of degradation (Williamson, Munn et al. 1998). Streams in this area have an average of 20% canopy cover and 70% bank erosion. These factors have severely affected the quality of habitat available to salmonids. The Palouse subunit of the Lower Snake River exceeds temperature levels for the protection of aquatic life (Williamson, Munn et al. 1998). Habitat loss has fragmented habitat and human density increase has created additional loads of pollutants and contaminants within the Columbia River Estuary (Anderson, Dugger et al. 2007). About 77% of swamps, 57% of marshes, and over 20% of tree cover have been lost to development and industry. Twenty four threatened and endangered species occur in the estuary, some of which are recovering and others (i.e., Chinook salmon) are not. The Willamette Basin Valley has been dramatically changed by modern settlement. The complexity of the mainstem river and extent of riparian forest have both been reduced by 80% (PNERC 2002). About 75% of what was formerly prairie and 60% of what was wetland has been converted to agricultural purposes. These actions, combined with urban development, extensive (96 miles) bank stabilization, and in-river and near-shore gravel 237
Page 1 and 2:
Ms. Debbie Edwards Director, Office
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National Marine Fisheries Service E
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Snake River Spring/Summer-Run Chino
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Commercial, Recreational, and Subsi
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Critical Habitat Risk Hypotheses ba
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Table of Figures Figure 1. Stressor
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Table of Tables Table 1. Registered
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Table 31. Area of Land Use Categori
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Table 67. . Examples of published f
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Agency: Activities Considered: Nati
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This Opinion is based on NMFS’ re
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activities that may improve EPA’s
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affect but is not likely to adverse
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On November 13, 2008, EPA provided
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On January 21, 2009, the agencies a
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in California, Idaho, Oregon, and W
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On that same date, EPA e-mailed NMF
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After registering a pesticide, EPA
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isk assessment. With these and othe
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Typically, formulations are combine
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EPA also issued generic and product
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pecans, peppers, pistachios, plums,
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Use Site plants, woody plants CRP a
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are subject to a four year phase-ou
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Table 2. Registered uses and applic
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mildews and other fungal diseases.
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methomyl are 32.4 lb a.i./acre/year
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would not likely adversely affect C
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In the final steps of our analyses,
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Evidence Available for the Consulta
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sustaining in the natural environme
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Stressors of the Action (see Figure
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Species Risk Hypotheses We construc
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habitats is then assessed. This por
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The problem formulation phase as ar
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Risk Characterization We follow the
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the probability of risk. In the Ris
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Figure 5. Map showing extent of inl
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Opinion. Summaries of the status an
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Chinook salmon are dependent on the
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Eureka Figure 6. CC Chinook salmon
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Table 6. CC Chinook salmon--prelimi
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Table 7 identifies populations with
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The CV drainage as a whole is estim
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have greatly reduced or eliminated
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Portland Salem Figure 9. LCR Chinoo
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important life history type remains
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Table 9. UCR Chinook salmon - preli
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In the most recent five-year geomet
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Figure 11. Puget Sound Chinook dist
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Status and Trends Puget Sound Chino
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flow, temperature, sediment load, w
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San Francisco Figure 12. Sacramento
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of historic spawning areas. Additio
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Status and Trends SR fall-run Chino
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Critical Habitat Critical habitat f
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Portland Seattle Spokane Figure 14.
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and five-year old fish, after two t
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surface and ground water and degrad
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Life History UWR Chinook salmon exh
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Bay, California. Historically, chum
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quality in the freshwater, estuarin
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Life History Chum salmon return to
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catastrophic events. Overall, the p
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Figure 17. Hood Canal Summer-run Ch
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improvements in 2000, with upward t
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ground water and degrade water qual
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San Francisco Figure 18. CCC Coho s
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Information on the abundance and pr
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Table 16 identifies populations wit
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Life History Although run time vari
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programs. The three major river sys
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Data on population abundance and tr
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Figure 21. Oregon Coast Coho salmon
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Preliminary spawner survey data for
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channels, backwaters, terrace tribu
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Figure 22. Ozette Lake Sockeye salm
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the 1997 status review due to resam
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Seattle Portland Figure 23. SR Sock
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Adult returns to Redfish Lake durin
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esume migration in early spring to
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Central California Coast Steelhead
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Status and Trends The CCC steelhead
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San Francisco Figure 25. California
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and Jackson 1996; McEwan 2001). Ste
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Olympia Portland Salem Figure 26. L
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hatchery fish in naturally-spawning
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species includes the only populatio
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Life History Most MCR steelhead smo
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Critical Habitat Critical habitat w
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Eureka Figure 28. Northern Californ
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may affect steelhead migration patt
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Of the 21 populations in the Puget
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Seattle Spokane Figure 30. SR Basin
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and spawner estimates for the Tucan
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San Jose Figure 31. S-CCC steelhead
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Figure 32. Southern California stee
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extinction,” with the remaining 1
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Portland Figure 33. UCR Steelhead d
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“low” for the Wenatchee and Met
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Figure 34. UWR Steelhead distributi
Page 203 and 204: Molalla/Pudding, Yamhill, Tualatin,
Page 205 and 206: Natural Mortality Factors Available
Page 207 and 208: Marine Mammal Predation Marine mamm
Page 209 and 210: downstream of Bonneville Dam. Socke
Page 211 and 212: Oceanographic Features and Climatic
Page 213 and 214: coincides with relatively poor ocea
Page 215 and 216: from streams in watersheds with agr
Page 217 and 218: chemicals used has decreased (Table
Page 219 and 220: California, Idaho, Oregon, and Wash
Page 221 and 222: to disease, decrease the ability of
Page 223 and 224: characterized by emergent aquatic p
Page 225 and 226: subregions and accounting units for
Page 227 and 228: Region USGS Subregion Central Calif
Page 229 and 230: Table 31. Area of Land Use Categori
Page 231 and 232: Table 33. Land uses and population
Page 233 and 234: (Table 34). See species ESU/DPS map
Page 235 and 236: undeveloped sites in the Santa Ana
Page 237 and 238: and grazing. Dams and water diversi
Page 239 and 240: Artificial Propagation Anadromous f
Page 241 and 242: water resources is handled by Calif
Page 243 and 244: containers at time of use. • Cond
Page 245 and 246: Table 36. Area of land use categori
Page 247 and 248: Columbia River Basin The most notab
Page 249 and 250: Ranching practices have led to incr
Page 251 and 252: 17% of mainstem Yakima River sample
Page 253: detected in samples from all sites,
Page 257 and 258: nation’s silver output has come f
Page 259 and 260: (USBR 1998 in (FCRPS 2008); providi
Page 261 and 262: The States of Oregon and Wasington
Page 263 and 264: Columbia River chum salmon are not
Page 265 and 266: including brown and brook trout, At
Page 267 and 268: density residential with some agric
Page 269 and 270: Although urban areas occupy only 2%
Page 271 and 272: Habitat Modification Much of the re
Page 273 and 274: Table 42. Pollutants of Concern in
Page 275 and 276: the 1950s. The vast majority of the
Page 277 and 278: pugettensis). An NPDES permit is re
Page 279 and 280: Habitat loss through wetland fills
Page 281 and 282: afted and moved to market or downst
Page 283 and 284: Oregon is in the process of develop
Page 285 and 286: Effects of the Proposed Action The
Page 287 and 288: Carbaryl dissipates in the environm
Page 289 and 290: high water solubility, low Kow, and
Page 291 and 292: Table 46. Environmental fate charac
Page 293 and 294: Species General Life History Descri
Page 295 and 296: Table 48. Examples of registered us
Page 297 and 298: Table 49. PRZM-EXAMS exposure estim
Page 299 and 300: estimate do not represent the highe
Page 301 and 302: BE provides a peak EEC of 5.5 μg/L
Page 303 and 304: alcoves, channel edge sloughs, over
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Carbaryl can also be applied at 8 l
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habitat had a downwind width of 10
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Depth of aquatic habitat (meters) B
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monitored in California, Idaho, Ore
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5.2 μg/L for carbofuran, 0.0150 -
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Summary information for carbaryl, c
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after flooding (Nicosia, Carr et al
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pesticide concentrations in the dis
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flowing water habitats, it is not s
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egistered products that contain mor
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potential ingredients in tank mixtu
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low maximum application rate. Howev
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occupy shoreline habitats of only a
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vertebrates and invertebrates (Walk
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Temperature and toxicity We found n
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exposure concentrations. Moreover,
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Summary of Toxicity Information Pre
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at several times during an experime
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Table 64. Assessment endpoint toxic
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fish, number of eggs per mature fem
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varigatus), an estuarine species, b
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included a NOAEC of 9.8 μg/L and a
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730 μg/L for D. magna (freshwater
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TEP) are contained in Appendix D-1.
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the uncertainties related to experi
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capacity (Little and Finger 1990).
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consumed relative to unexposed fish
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24 hr exposure (Zinkl, Shea et al.
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We located studies that measured ol
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endpoints of salmonids remains a re
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items (Courtemanch and Gibbs 1980;
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single pulse of chlorpyrifos was in
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Table 65. Study designs and results
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Chemical Taxa/species Assessment me
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Chemical Taxa/species carbofuran ca
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Chemical Taxa/species carbofuran ca
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macroinvertebrate community did not
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Jardine, MacLatchy et al. 2005; Luo
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Risk Characterization In this secti
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survival appears to be the most sen
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factor in the degree of toxicity of
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Figure 41. Methomyl exposure concen
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Table 67. . Examples of published f
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Additionally, the macroinvertebrate
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Measured Concentrations in Willapa
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up to 100 m off the carbaryl applic
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average initial concentration from
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• Unrelated (0): Conclusive evide
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the fish to determine the cause of
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Dose-addition assumes the cumulativ
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Table 73. Predicted AChE inhibition
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habitats during aerial applications
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The second line of evidence is whet
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D. Impair swimming which leads to r
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F. Exposure to mixtures of carbaryl
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used surfactant/adjuvant mixed with
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In a second modeling exercise, we t
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Carbaryl’s thresholds for the fou
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Table 75. Modeled output for Stream
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Table 77. Modeled output for Sockey
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The likelihood of scenarios 2 and 3
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The three insecticides are highly t
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A. B. C. Figure 43. Probability plo
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elatively low survival EC50 values
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dominated by agricultural or urban
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Figure 45. Percent change in lambda
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Table 80. Multiple application scen
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Because olfaction plays an importan
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expect co-occurrence of the three i
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support one or more lifestages. For
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We attempted to compare expected co
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Cumulative Effects Cumulative effec
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entry into freshwater systems. Carb
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Integration and Synthesis The Integ
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carbofuran applications could cause
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The Status of Listed Resources and
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also exposed to poor water quality
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Given the life history of LCR Chino
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Chinook salmon. Furthermore, there
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all three a.i.s are expected to be
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completing migration to the Pacific
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The major threats to this ESU ident
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Land use data indicate that the Col
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Central California Coast Coho Salmo
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Pesticide use and detections in LCR
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effects. In several streams, one or
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ESU is evergreen forest. Between 19
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miles where agricultural crops are
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The Status of Listed Resources and
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carbofuran application to potatoes,
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The major threats to this DPS ident
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lowland areas (below 1,000 ft eleva
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consequences and subsequent populat
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and surface waters within the heavi
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1994). Most juvenile steelhead spen
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salmon, Northern California steelhe
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natural cover such as submerged and
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The precise change in the conservat
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coho salmon, LCR coho salmon, South
Page 503 and 504:
Table 81. Jeopardy and Non-Jeopardy
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Reasonable and Prudent Alternatives
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The RPA is comprised of six require
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Table 83. Mandatory pesticide no ap
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items will die from these exposures
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action will attain this level in th
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proposed action. Therefore, inciden
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1. Minimize the amount and extent o
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met within the next 15 years, then
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Arunachalam, S., K. Jeyalakshmi, et
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Bortleson, G. C. and J. C. Ebbert (
Page 525 and 526:
CDFG (1995). "Letter dated 30 March
Page 527 and 528:
Davies, P. E. and L. S. J. Cook (19
Page 529 and 530:
FCRPS (2008). "Endangered Species A
Page 531 and 532:
Haggerty, M. J., A. C. Ritchie, et
Page 533 and 534:
IEPSPWT (1999). "Monitoring, assess
Page 535 and 536:
government from 1896 to 1945." Repo
Page 537 and 538:
Matthews, G. M. and R. S. Waples (1
Page 539 and 540:
NMFS (2004). Five-year integrated p
Page 541 and 542:
PSAT (2004). "State of the Sound 20
Page 543 and 544:
Schroder, S. L. (1977). "Assessment
Page 545 and 546:
Tufts, D. F. (1990). "Control of bu
Page 547 and 548:
Williams, A. K. and C. R. Sova (196
Page 549 and 550:
Introduction To assess the potentia
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ocean-type and stream-type Chinook
Page 553 and 554:
incorporates empirical data when av
Page 555 and 556:
given a percentile value of 50 (i.e
Page 557 and 558:
species-appropriate growth period (
Page 559 and 560:
For Figure 3C, an exposure pulse wo
Page 561 and 562:
the n x n square matrix (A) by assi
Page 563 and 564:
spawn (Pess et al. 2002). Survival
Page 565 and 566:
distributed survival and reproducti
Page 567 and 568:
Figure 1: Life-History Graphs and T
Page 569 and 570:
Table 1. List of values used for co
Page 571 and 572:
Table 4. Matrix transition element
Page 573 and 574:
Figure 2. 555
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Figure 4. 557
Page 577 and 578:
Brewer, S.K., Little, E.E., DeLonay
Page 579 and 580:
Higgs, D.A., MacDonald, J.S., Levin
Page 581 and 582:
Morgan, M.J., and Kiceniuk, J.W. 19
Page 583 and 584:
Scholz, N.L., Truelove, N.K., Frenc
Page 585 and 586:
Appendix 2. Species and Population
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Chinook Salmon (continued) ESU Popu
Page 589 and 590:
Chum Salmon ESU Population λ - H=0
Page 591 and 592:
Coho Salmon (continued) ESU Populat
Page 593 and 594:
Steelhead (continued) DPS Populatio
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Appendix 3: Abbreviations 7-DADMax
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FQPA Food Quality Protection Act ft
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PPE Personal Protection Equipment P
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Appendix 4: Glossary 303(d) waters
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Salmon fall to head upriver to its
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Main channel The stream channel tha
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Smolt A juvenile salmon or steelhea
Page 609:
WQS “A water quality standard def
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