Kennecott north facilities soils and wastewater treatment plant ponds site removal action correspondence and documents, 1998-2000

Page 126

Ecological ?isk Assessment Northern Oquirrh Mountains Mean and standard deviation of the CoC concentrations (ppm, dry weight) in livers of herbivorous and granivorous mammals captured Table 17. not detected) 1. on each sampling site (NO Site N Arsenic Cadmium Copper Lead Selenium Zinc CC2 1 mean NO 0.23 11.22 NO 13.54 70.15 LV2 1 mean 0.55 0.37 15.98 0.32 6.24 87.36 BR1 1 mean 1.09 0.89 18.77 0.45 15.38 = I' 79.01 ,I .I BR2 PC1 PC2 3 2 3 0.20 0.40 24.90 0.71 12.07 stdev 0.19 0.18 4.20 0.71 8.75 7.40 19.41 1.11 4.20 80.87 mean 1.18 13.99 stdev 1.67 16.21 5.55 0.13 0.32 mean NO 16.12 14.17 3.55 2.81 99.80 10.29 1.30 2.87 0.16 7.31 5.21 15.68 7.08 6.72 84.87 6.24 0.27 0.46 6.20 8.34 , stdev PC3 2 mean NO stdev 1 81.79 mean 4.42 - No herbivorous mammals were captured at CC1, LV1, KC1, or KC2. The liver concentrations of CoC in small mammals can be compared to liver concentrations in rock squirrels (Spermophilus varigatus) (Table 18) and mule deer (Odocoileus hemionus) collected in the northern Oquirrh Mountains in 1971 and 1972 (Sharma et a/. 1974). In rock squirrels, Cu and Pb concentrations were highest in Black Rock Canyon, while Cd concentrations were highest in Swenson's Canyon just north of Pine Canyon. As, Se, and Rock squirrels captured by Zn were similar in Black Rock and Swenson's Canyons. Sharma et a/. (1974)' contained higher concentrations of As, Cd, and Zn than mammals captured in 1995 (Table 19). However, Cu and Se were slightly higher in the mice captured in 1995. Table 18. Mean and standard deviation of liver concentrations of CoC in rock squirrels captured in 1971 and 1972 (Sharma et ale 1974). Locations' N Middle Coon 7 Canyon Little Valley 8 Wash Black Rock 3 Canyon Swenson's Canyon 1 8 Arsenic Cadmium Copper Lead mean 0.8 5.7 19.0 5.5 - stdev 0.6 3.3 5.1 0.8 - mean 0.7 2.4 19.9 5.6 - stdev 0.3 0.6 9.3 1.2 - mean 7.4 5.3 35.9 352.9 0.1 1.8 20.1 9.2 11.1 11.8 stdev 3.3 386.9 mean 6.0 26.7 16.7 2.7 384.3 stdev 1.4 15.5 6.3 2.1 12.8 6.4 I' Selenium Middle Coon Canyon site is near CC1 and CC2 on Soldiers Bench and 5.4 miles from the Garfield Smelter. Zinc 242.2 61.7 241.5 26.8 333.2 Little Valley Wash and Black Rock Canyon sites are 3.8 and 1.0 miles from the Garfield Smelter, respectively. Swensen's Canyon is north of Pine Canyon near PC2 and PC3 and 0.7 miles from the International Smelter. ecological planning and toxicology, inc. 49