PRELIMINARY PUBLIC HEALTH ASSESSMENT ADDENDUM
RICHARDSON FLAT TAILINGS
PARK CITY, SUMMIT COUNTY, UTAH
APPENDIX B: CONTAMINANT AND PATHWAY TABLES
TABLE 1. Contaminant Concentrations in Groundwater On Site; Area A--Monitoring Wells
| Contaminant | Maximum Concentration |
Date | Comparison Value | ||
| (ppb) | (reference) | (ppb) | Source | ||
| Aluminum | 94,900* | E&E 1993 | 1992 | none | |
| Antimony | 35.9? | E&E 1992 | 1992 | 4 | RMEG |
| Arsenic | 81.1* | E&E 1993 | 1992 | 0.02 | CREG |
| Barium | 1,180* | E&E 1993 | 1992 | 700 | RMEG |
| Beryllium | 4.6J* | E&E 1993 | 1992 | 0.0081 | CREG |
| Cadmium | 48 | E&E 1985 | 1985 | 2 | EMEG |
| Calcium | 365,000 | E&E 1992 | 1992 | none | |
| Chromium | 110J* | E&E 1993 | 1992 | 10,000 | RMEG |
| Cobalt | 80 | E&E 1985 | 1985 | none | |
| Copper | 1,583 | E&E 1985 | 1985 | 1,300 | AL |
| Iron | 130,000 | E&E 1985 | 1985 | none | |
| Lead | 1,080 | E&E 1985 | 1985 | 15 | AL |
| Magnesium | 88,000 | E&E 1985 | 1985 | none | |
| Manganese | 22,300* | E&E 1993 | 1992 | 1,000 | RMEG |
| Mercury | 0.7 | E&E 1985 | 1985 | 2 | LTHA |
| Nickel | 93.1* | E&E 1993 | 1992 | 100 | LTHA |
| Potassium | 22,100* | E&E 1993 | 1992 | none | |
| Silver | 17 | E&E 1985 | 1985 | 50 | RMEG |
| Sodium | 54,000 | E&E 1985 | 1985 | none | |
| Thallium | <100 | E&E 1985 | 1985 | 0.4 | LTHA |
| Vanadium | 266 | E&E 1985 | 1985 | 20 | LTHA |
| Zinc | 2,790 | E&E 1985 | 1985 | 2,100 | LTHA |
| *- Sample obtained by landfill Unfiltered sample data ppb-parts per billion ?- approximate value <- less than AL- action level J- estimated value CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide LTHA- lifetime health advisory EMEG- environmental media evaluation guide |
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TABLE 2. Contaminant Concentrations in Tailings On Site;
Areas A and B
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppm) | (reference) | (ppm) | Source | ||
| Aluminum | A-3,440 B-1,030 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Antimony | A-171 B-144 |
E&E 1985 E&E 1989 |
1985 1989 |
280 | RMEG |
| Arsenic | A-3,600 B-259* |
E&E 1985 E&E 1989 |
1985 1989 |
0.4 | CREG |
| Barium | A-153 B-117 |
E&E 1989 E&E 1989 |
1989 1989 |
49,000 | RMEG |
| Beryllium | A-1.2 B-ND |
E&E 1992 E&E 1989 |
1992 1989 |
0.16 | CREG |
| Cadmium | A-169 B-250 |
E&E 1985 E&E 1989 |
1985 1989 |
140 | EMEG |
| Calcium | A-117,000 B-32,800 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Chromium | A-60 B-ND |
E&E 1985 E&E 1989 |
1985 1989 |
700,000 | RMEG |
| Cobalt | A-12.6 B-3.9* |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Copper | A-961 B-281 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Iron | A-154,000 B-87,000 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Lead | A-8,530 B-31,600 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Magnesium | A-23,000 B-1,140* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Manganese | A-5,990 B-252 |
E&E 1985 E&E 1989 |
1985 1989 |
70,000 | RMEG |
| Mercury | A-3.6? B-8.2 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Nickel | A-9.4 B-6.2* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Potassium | A-917 B-1,140* |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Silver | A-26 B-115 |
E&E 1985 E&E 1989 |
1985 1989 |
3,500 | RMEG |
| Sodium | A-11,300 B-603* |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Thallium | A-41.7 B-9.7* |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Vanadium | A-13.0 B-2.6 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Zinc | A-23,200 B-33,800 |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| A- Area A B- Area B ppm- parts per million ?- approximate value *- estimated value CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide EMEG- environmental media evaluation guide |
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TABLE 3. Contaminant Concentrations in Soil Cover Layer
Over Tailings On Site; Area A
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppm) | (reference) | (ppm) | Source | ||
| Aluminum | 25,300 | E&E 1992 | 1992 | none | |
| Antimony | 5.7? | E&E 1992 | 1992 | 280 | RMEG |
| Arsenic | 20.9? | E&E 1992 | 1992 | 0.4 | CREG |
| Barium | 317 | E&E 1992 | 1992 | 49,000 | RMEG |
| Beryllium | 1.2 | E&E 1992 | 1992 | 0.16 | CREG |
| Cadmium | 5.0? | E&E 1992 | 1992 | 140 | EMEG |
| Calcium | 9,480 | E&E 1992 | 1992 | none | |
| Chromium | 28.2 | E&E 1992 | 1992 | 700,000 | RMEG |
| Cobalt | 15.0 | E&E 1992 | 1992 | none | |
| Copper | 50.4 | E&E 1992 | 1992 | none | |
| Iron | 2,750 | E&E 1992 | 1992 | none | |
| Lead | 223 | E&E 1992 | 1992 | none | |
| Magnesium | 5,570 | E&E 1992 | 1992 | none | |
| Manganese | 1,030 | E&E 1992 | 1992 | 70,000 | RMEG |
| Mercury | 0.16 | E&E 1992 | 1992 | none | |
| Nickel | 21.6 | E&E 1992 | 1992 | none | |
| Potassium | 5,650 | E&E 1992 | 1992 | none | |
| Silver | 4.1? | E&E 1992 | 1992 | 3,500 | RMEG |
| Sodium | 319? | E&E 1992 | 1992 | none | |
| Thallium | 1.9? | E&E 1992 | 1992 | none | |
| Vanadium | 57.4 | E&E 1992 | 1992 | none | |
| Zinc | 432 | E&E 1992 | 1992 | none | |
| ppm- parts per million ?- approximate value CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide EMEG- environmental media evaluation guide |
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TABLE 4. Contaminant Concentrations in Surface Water On
Site; Area A (Diversion Ditch and Marsh) and Area B (Silver Creek)
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppb) | (reference) | (ppb) | Source | ||
| Aluminum | A-30,900 B-77 |
E&E 1989 E&E 1985 |
1989 1985 |
none | |
| Antimony | A-937 B-39 |
E&E 1989 E&E 1992 |
1989 1992 |
4 | RMEG |
| Arsenic | A-2,326 B-619 |
E&E 1989 E&E 1989 |
1989 1989 |
0.02 | CREG |
| Barium | A-2,330 B-60.8* |
E&E 1989 E&E 1989 |
1989 1989 |
700 | RMEG |
| Beryllium | A-3.2? B-2.4* |
E&E 1992 E&E 1989 |
1992 1989 |
0.0081 | CREG |
| Cadmium | A-289 B-35? |
E&E 1989 E&E 1992 |
1989 1992 |
2 | EMEG |
| Calcium | A-446,000 B-149,000 |
E&E 1989 E&E 1992 |
1989 1992 |
none | |
| Chromium | A-50.2 B-72.2 |
E&E 1989 E&E 1989 |
1989 1989 |
10,000 | RMEG |
| Cobalt | A-48.7* B-5.7* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Copper | A-1,540 B-9 |
E&E 1989 E&E 1985 |
1989 1985 |
1,300 | AL |
| Iron | A-107,000 B-389 |
E&E 1989 E&E 1985 |
1989 1985 |
none | |
| Lead | A-22,100* B-15? |
E&E 1989 E&E 1992 |
1989 1992 |
15 | AL |
| Magnesium | A-104,000 B-33,600 |
E&E 1989 E&E 1992 |
1989 1992 |
none | |
| Manganese | A-21,100 B-434 |
E&E 1989 E&E 1985 |
1989 1985 |
1,000 | RMEG |
| Mercury | A-8 B-11.5 |
E&E 1989 E&E 1989 |
1989 1989 |
2 | LTHA |
| Nickel | A-65.5 B-67.3* |
E&E 1989 E&E 1989 |
1989 1989 |
100 | LTHA |
| Potassium | A-15,600 B-1,950? |
E&E 1989 E&E 1992 |
1989 1992 |
none | |
| Silver | A-201 B-117 |
E&E 1989 E&E 1989 |
1989 1989 |
50 | RMEG |
| Sodium | A-58,500 B-42,700 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Thallium | A-83.4* B-4.2* |
E&E 1989 E&E 1989 |
1989 1989 |
0.4 | LTHA |
| Vanadium | A-58.7 B-121 |
E&E 1989 E&E 1989 |
1989 1989 |
20 | LTHA |
| Zinc | A-49,100 B-1,650 |
E&E 1989 E&E 1985 |
1989 1985 |
2,100 | LTHA |
| A- Area A B- Area B ppb- parts per billion ?- approximate value *- estimated value AL- action level CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide LTHA- lifetime health advisory EMEG- environmental media evaluation guide |
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TABLE 5. Contaminant Concentrations in Sediments On Site;
Area A
(Diversion Ditch, Marsh, Ponded Water Locations) and Area B (Silver Creek)
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppm) | (reference) | (ppm) | Source | ||
| Aluminum | A-28,800 B-8,620 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Antimony |
A-200* |
E&E 1989 E&E 1989 |
1989 1989 |
280 | RMEG |
| Arsenic | A-839 B-590 |
E&E 1989 E&E 1989 |
1989 1989 |
0.4 | CREG |
| Barium | A-1,220 B-147 |
E&E 1989 E&E 1989 |
1989 1989 |
49,000 | RMEG |
| Beryllium | A-2.3 B-0.86* |
E&E 1992 E&E 1989 |
1992 1989 |
0.16 | CREG |
| Cadmium | A-185* B-91.4* |
E&E 1989 E&E 1989 |
1989 1989 |
140 | EMEG |
| Calcium | A-249,000 B-25,600 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Chromium | A-62.9? B-1.0* |
E&E 1992 E&E 1989 |
1992 1989 |
700,000 | RMEG |
| Cobalt | A-64.4 B-43.5 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Copper | A-870 B-753 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Iron | A-156,000 B-148,000 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Lead | A-13,600 B-14,200 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Magnesium | A-33,800 B-9,430 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Manganese | A-207,000 B-1,730 |
E&E 1989 E&E 1989 |
1989 1989 |
70,000 | RMEG |
| Mercury | A-8.2? B-6.0 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Nickel | A-97.2 B-28.8 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Potassium | A-6,270 B-1,160* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Silver | A-86.0 B-47.5 |
E&E 1989 E&E 1989 |
1989 1989 |
3,500 | RMEG |
| Sodium | A-1,150? B-181* |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Thallium | A-24.1* B-4.1* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Vanadium | A-70.6 B-21.2 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Zinc | A-26,400 B-15,500 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| ppm- parts per million ?- approximate value *- estimated value A- Area A B- Area B RMEG- reference dose media evaluation guide CREG- cancer risk evaluation guide EMEG- environmental media evaluation guide |
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TABLE 6. Contaminant Concentrations in Ambient Air On Site;
Area A
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (µg/m3) | (reference) | (µg/m3) | Source | ||
| Aluminum | NI | ||||
| Antimony | NI | ||||
| Arsenic | 0.0927 | E&E 1991c | 1986 | 0.00023 | CREG |
| Barium | NI | ||||
| Beryllium | NI | ||||
| Cadmium | 0.0143* | E&E 1991c | 1986 | 0.00056 | CREG |
| Calcium | NI | ||||
| Chromium | NI | ||||
| Cobalt | NI | ||||
| Copper | NI | ||||
| Iron | NI | ||||
| Lead | 1.6478 | E&E 1991c | 1986 | none | |
| Magnesium | NI | ||||
| Manganese | NI | ||||
| Mercury | NI | ||||
| Nickel | NI | ||||
| Potassium | NI | ||||
| Silver | NI | ||||
| Sodium | NI | ||||
| Thallium | NI | ||||
| Vanadium | NI | ||||
| Zinc | 1.4478* | E&E 1991c | 1986 | none | |
| µg/m3- micrograms per cubic meter *- estimated value NI- no information CREG- cancer risk evaluation guide |
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TABLE 7. Contaminant Concentrations in Groundwater Off Site;
Background Monitoring Well and Three Nearby Industrial Wells
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppb) | (reference) | (ppb) | Source | ||
| Aluminum | C-15,700 D-NI |
E&E 1992 | 1992 | none | |
| Antimony | C-<5 D-NI |
E&E 1985 | 1985 | 4 | RMEG |
| Arsenic | C-3.7? D-4.8? |
E&E 1992 E&E 1991d |
1992 1991 |
0.02 | CREG |
| Barium | C-196? D-NI |
E&E 1992 | 1992 | 700 | RMEG |
| Beryllium | C-1.3? D-NI |
E&E 1992 | 1992 | 0.0081 | CREG |
| Cadmium | C-<5 D-ND |
E&E 1985 E&E 1991d |
1985 1991 |
2 | EMEG |
| Calcium | C-42,000 D-NI |
E&E 1992 | 1992 | none | |
| Chromium | C-10.5 D-ND |
E&E 1992 E&E 1991d |
1992 1991 |
10,000 | RMEG |
| Cobalt | C-11? D-NI |
E&E 1992 | 1992 | none | |
| Copper | C-30 D-NI |
E&E 1992 | 1992 | 1,300 | AL |
| Iron | C-14,000 D-NI |
E&E 1992 | 1992 | none | |
| Lead | C-627? D-36.9 |
E&E 1992 E&E 1991d |
1992 1991 |
15 | AL |
| Magnesium | C-12,200 D-NI |
E&E 1992 | 1992 | none | |
| Manganese | C-162? D-NI |
E&E 1992 | 1992 | 1,000 | RMEG |
| Mercury | C-<0.1 D-NI |
E&E 1985 | 1985 | 2 | LTHA |
| Nickel | C-13 D-NI |
E&E 1992 | 1992 | 100 | LTHA |
| Potassium | C-3,970? D-NI |
E&E 1992 | 1992 | none | |
| Silver | C-<5 D-NI |
E&E 1985 | 1985 | 50 | RMEG |
| Sodium | C-16,100 D-NI |
E&E 1992 | 1992 | none | |
| Thallium | C-<100 D-NI |
E&E 1985 | 1985 | 0.4 | LTHA |
| Vanadium | C-<10 D-NI |
E&E 1985 | 1985 | 20 | LTHA |
| Zinc | C-136? D-NI |
E&E 1992 | 1992 | 2,100 | LTHA |
| Unfiltered sample data C- background monitoring well D- three nearby industrial wells ppb- parts per billion NI- no information ?- approximate value <- less than EMEG- environmental media evaluation guide CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide LTHA- lifetime health advisory AL- action level |
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TABLE 8. Contaminant Concentrations in Groundwater Off Site;
Public Water Supply Wells--Atkinson Special Improvement District, High Valley
Water Company, and Summit County Service Area #3
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppb) | (reference) | (ppb) | Source | ||
| Aluminum | E-NI F-NI G-NI |
none | |||
| Antimony | E-NI F-NI G-NI |
4 | RMEG | ||
| Arsenic | E-<1 F-7 G-7 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
0.02 | CREG |
| Barium | E-60 F-180 G-80 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
700 | RMEG |
| Beryllium | E-NI F-NI G-NI |
0.0081 | CREG | ||
| Cadmium | E-<1 F-<1 G-<1 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1988 |
2 | EMEG |
| Calcium | E-71,000 F-78,000 G-NI |
UDEQ 1992b UDEQ 1992b |
1988 1987 |
none | |
| Chromium | E-<1 F-5 G-<1 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1985 1988 |
10,000 | RMEG |
| Cobalt | E-NI F-NI G-NI |
none | |||
| Copper | E-<10 F-120 G-30 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
1,300 | AL |
| Iron | E-680 F-710 G-170 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1985 1981 |
none | |
| Lead | E-<1 F-<5 G-<1 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1988 |
15 | AL |
| Magnesium | E-11,000 F-21,000 G-12,000 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1981 |
none | |
| Manganese | E-20 F-35 G-25 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1985 1981 |
1,000 | RMEG |
| Mercury | E-0.2 F-<0.2 G-<0.2 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
2 | LTHA |
| Nickel | E-<10 F-NI G-<30 |
UDEQ 1992b UDEQ 1992b |
1988
1989 |
100 | LTHA |
| Potassium | E-3,000 F-4,000 G-4,000 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
none | |
| Silver | E-<1 F-<2 G-<1 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
50 | RMEG |
| Sodium | E-54,000 F-23,000 G-86,000 |
UDEQ 1992b UDEQ 1992b UDEQ 1992b |
1988 1987 1989 |
none | |
| Thallium | E-NI F-NI G-NI |
0.4 | LTHA | ||
| Vanadium | E-NI F-NI G-NI |
20 | LTHA | ||
| Zinc | E-100 F-150 G-130 |
UDEQ 1992b UDEQ 1992b |
1988 1985 1989 |
2,100 | LTHA |
| Reference not state whether samples were filtered E- Atkinson Special Improvement District F- High Valley Water Company G- Summit County Service Area #3 ppb- parts per billion <- less than NI- no information AL- action level CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide LTHA- lifetime health advisory EMEG- environmental media evaluation guide |
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TABLE 9. Contaminant Concentrations in Soils Off Site; Surface
Soils and Subsurface Soils
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppm) | (reference) | (ppm) | Source | ||
| Aluminum | G-14,400 H-16,900 |
E&E 1985 E&E 1985 |
1985 1985 |
none | |
| Antimony | G-89* H-NAD |
E&E 1987a E&E 1985 |
1987 1985 |
280 | RMEG |
| Arsenic | G-87 H-6.5 |
E&E 1987a E&E 1985 |
1987 1985 |
0.4 | CREG |
| Barium | G-668 H-147 |
E&E 1987a E&E 1985 |
1987 1985 |
49,000 | RMEG |
| Beryllium | G-43* H-NAD |
E&E 1987a E&E 1985 |
1987 1985 |
0.16 | CREG |
| Cadmium | G-17 H-7.4 |
E&E 1985 E&E 1985 |
1985 1985 |
140 | EMEG |
| Calcium | G-46,900 H-5,020 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Chromium | G-743* H-19 |
E&E 1987a E&E 1985 |
1987 1985 |
700,000 | RMEG |
| Cobalt | G-159* H-9.5 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Copper | G-100 H-17 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Iron | G-94,200 H-19,700 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Lead | G-1,100 H-37 |
E&E 1985 E&E 1985 |
1985 1985 |
none | |
| Magnesium | G-55,000 H-7,620 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Manganese | G-15,400 H-625 |
E&E 1987a E&E 1985 |
1987 1985 |
70,000 | RMEG |
| Mercury | G-1.0* H-NAD |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Nickel | G-52 H-22 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Potassium | G-1,480* H-NI |
E&E 1987a | 1987 | none | |
| Silver | G-6.7 H-NAD |
E&E 1985 E&E 1985 |
1985 1985 |
3,500 | RMEG |
| Sodium | G-5,620 H-279 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Thallium | G-2.4 H-NAD |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Vanadium | G-1,390* H-31 |
E&E 1987a E&E 1985 |
1987 1985 |
none | |
| Zinc | G-1,570 H-70 |
E&E 1985 E&E 1985 |
1985 1985 |
none | |
| G- surface soils H- subsurface soils ppm- parts per million *- estimated value CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide EMEG- environmental media evaluation guide |
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TABLE 10. Contaminant Concentrations in Surface Water Off
Site; Upstream (Pace Homer Ditch and Silver Creek) and Downstream (Silver Creek)
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppb) | (reference) | (ppb) | Source | ||
| Aluminum | I-172 J-370 |
E&E 1985 E&E 1985 |
1985 1985 |
none | |
| Antimony | I-36.7? J-35 |
E&E 1992 E&E 1985 |
1992 1985 |
4 | RMEG |
| Arsenic | I-14 J-110 |
E&E 1985 UDEQ 1992c |
1985 1988 |
0.02 | CREG |
| Barium | I-54.6? J-140 |
E&E 1992 UDEQ 1992c |
1992 1991 |
700 | RMEG |
| Beryllium | I-3.4? J-2.4? |
E&E 1992 E&E 1992 |
1992 1992 |
0.0081 | CREG |
| Cadmium | I-3.9? J-10 |
E&E 1992 UDEQ 1992c |
1992 1988 |
2 | EMEG |
| Calcium | I-23,300 J-163,000 |
E&E 1992 E&E 1992 |
1992 1992 |
none | |
| Chromium | I-<5 J-8 |
E&E 1985 UDEQ 1992c |
1985 1985 |
10,000 | RMEG |
| Cobalt | I-<5 J-4.0* |
E&E 1985 E&E 1989 |
1985 1989 |
none | |
| Copper | I-12 J-60 |
E&E 1985 E&E 1985 |
1985 1985 |
1,300 | AL |
| Iron | I-725 J-2,290 |
E&E 1985 E&E 1985 |
1985 1985 |
none | |
| Lead | I-147 J-1,985 |
E&E 1985 E&E 1985 |
1985 1985 |
15 | AL |
| Magnesium | I-38,700 J-37,700 |
E&E 1992 E&E 1992 |
1992 1992 |
none | |
| Manganese | I-764 J-1,900 |
E&E 1985 UDEQ 1992c |
1985 1988 |
1,000 | RMEG |
| Mercury | I-0.2 J-0.3 |
E&E 1985 UDEQ 1992c |
1985 1992 |
2 | LTHA |
| Nickel | I-25.4? J-NAD |
E&E 1992 E&E 1985 |
1992 1985 |
100 | LTHA |
| Potassium | I-3,510? J-2,090 |
E&E 1992 E&E 1989 |
1992 1989 |
none | |
| Silver | I-<5 J-10 |
E&E 1985 E&E 1992 |
1985 1992 |
50 | RMEG |
| Sodium | I-63,600 J-27,600 |
E&E 1992 E&E 1992 |
1992 1992 |
none | |
| Thallium | I-<100 J-NAD |
E&E 1985 E&E 1985 |
1985 1985 |
0.4 | LTHA |
| Vanadium | I-<10 J-NAD |
E&E 1985 E&E 1985 |
1985 1985 |
20 | LTHA |
| Zinc | I-2,690 J-3,700 |
E&E 1985 UDEQ 1992c |
1985 1988 |
2,100 | LTHA |
| I- upstream of site ppb- parts per billion *- estimated value ?- approximate value <- less than NAD- no applicable data J- downstream of site AL- action level CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide LTHA- lifetime health advisory EMEG- environmental media evaluation guide |
|||||
TABLE 11. Contaminant Concentrations in Sediments Off Site;
Upstream (Silver Creek and Pace Homer Ditch) and Downstream of Site (Silver
Creek)
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (ppm) | (reference) | (ppm) | Source | ||
| Aluminum | K-18,400* L-20,200 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Antimony | K-183* L-ND |
E&E 1989 E&E 1989 |
1989 1989 |
280 | RMEG |
| Arsenic | K-555 L-5.4 |
E&E 1989 E&E 1989 |
1989 1989 |
0.4 | CREG |
| Barium | K-270 L-408 |
E&E 1989 E&E 1989 |
1989 1989 |
49,000 | RMEG |
| Beryllium | K-1.7 L-1.6 |
E&E 1989 E&E 1989 |
1989 1989 |
0.16 | CREG |
| Cadmium | K-113* L-2.2* |
E&E 1989 E&E 1989 |
1989 1989 |
140 | EMEG |
| Calcium | K-18,900 L-9,640 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Chromium | K-21.9 L-18.5 |
E&E 1989 E&E 1989 |
1989 1989 |
700,000 | RMEG |
| Cobalt | K-76.8 L-10.9* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Copper | K-496 L-40.7 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Iron | K-263,000 L-25,500 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Lead | K-12,200 L-108 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Magnesium | K-6,340 L-6,360 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Manganese | K-1,560 L-303 |
E&E 1989 E&E 1989 |
1989 1989 |
70,000 | RMEG |
| Mercury | K-3.3 L-0.1* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Nickel | K-31.4 L-17.0 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Potassium | K-3,160 L-6,050 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Silver | K-39.8 L-ND |
E&E 1989 E&E 1989 |
1989 1989 |
3,500 | RMEG |
| Sodium | K-239* L-389* |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Thallium | K-6.0* L-ND |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Vanadium | K-48.7 L-37.7 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| Zinc | K-17,500 L-302 |
E&E 1989 E&E 1989 |
1989 1989 |
none | |
| K- upstream L- downstream ppm- parts per million *- estimated value CREG- cancer risk evaluation guide RMEG- reference dose media evaluation guide EMEG- environmental media evaluation guide |
|||||
TABLE 12. Contaminant Concentrations in Ambient Air Off
Site
| Contaminant | Maximum Concentration | Date | Comparison Value | ||
| (µg/m3) | (reference) | (µg/m3) | Source | ||
| Aluminum | NI | ||||
| Antimony | NI | ||||
| Arsenic | ND ND |
E&E 1991c USEPA 1992c |
1986 1992 |
0.00023 | CREG |
| Barium | NI | ||||
| Beryllium | NI | ||||
| Cadmium | 0.0009* ND |
E&E 1991c USEPA 1992c |
1986 1992 |
0.00056 | CREG |
| Calcium | NI | ||||
| Chromium | NI | ||||
| Cobalt | NI | ||||
| Copper | NI | ||||
| Iron | NI | ||||
| Lead | 0.0391 ND |
E&E 1991c USEPA 1992c |
1986 1992 |
none | |
| Magnesium | NI | ||||
| Manganese | NI | ||||
| Mercury | NI | ||||
| Nickel | NI | ||||
| Potassium | NI | ||||
| Silver | NI | ||||
| Sodium | NI | ||||
| Thallium | NI | ||||
| Vanadium | NI | ||||
| Zinc | 0.0579* 0.1 |
E&E 1991c USEPA 1992c |
1986 1992 |
none | |
| µg/m3- micro grams per cubic meter *- estimated value ND- not detected NI- no information CREG- cancer risk evaluation guide |
|||||
TABLE 13. COMPLETED EXPOSURE PATHWAYS
| COMPLETED PATHWAY NAME |
COMPLETED EXPOSURE PATHWAY ELEMENTS
|
TIME | ||||
| PLAUSIBLE SOURCE | MEDIUM | POINT OF EXPOSURE | ROUTE OF EXPOSURE | EXPOSED POPULATION | ||
| Tailings On Site Area A |
Tailings | Tailings | On Site (Area A) |
Ingestion Inhalation, particulates |
Tailings workers, Trespassers |
Past |
| Surface Soil On Site Area A |
Tailings | Soil | On Site (Area A) |
Ingestion Inhalation, particulates |
Tailings workers, Trespassers |
Past |
| Surface water On Site Area A |
Tailings transport water & runon | Surface water | On Site (Area A) |
Ingestion | Tailings workers, Trespassers |
Past |
| Ambient air On Site Area A |
Tailings | Air | On Site (Area A) |
Inhalation, particulates
|
Tailings workers, Trespassers |
Past |
| Public water systems | Uncertain | Groundwater | Off Site | Ingestion, inhalation | Residents, Workers (water system users) |
Past Present Future |
TABLE 14. POTENTIAL EXPOSURE PATHWAYS
| POTENTIAL PATHWAY NAME |
POTENTIAL EXPOSURE PATHWAY ELEMENTS
|
TIME | ||||
| PLAUSIBLE SOURCE | MEDIUM | POINT OF EXPOSURE | ROUTE OF EXPOSURE | EXPOSED POPULATION | ||
| Tailings On Site Area A & Area B |
Tailings | Tailings | On Site Area A, Area B |
Ingestion Inhalation, particulates |
Area A: remediation/ maintenance workers; future residents & workers. Area B: trespassers |
Past Present Future |
| Surface Soil On Site Area A & Area B |
Tailings | Soil | On Site Area A, Area B |
Ingestion Inhalation, particulates |
Remediation/ maintenance workers | Past Present Future |
| Surface Water On Site Area A |
Runon | Surface water | On Site Area A |
Ingestion | Remediation/ maintenance workers | Past Present Future |
| Ambient Air On Site Area A |
Tailings | Air | On Site Area A |
Inhalation, particulates |
Remediation/ maintenance workers | Past Present Future |
| Private well water Off Site |
Uncertain | Groundwater | Off Site, closest residences, businesses |
Ingestion Inhalation, aerosols |
Residents, workers |
Past Present Future |
| Surface soil Off Site |
Tailings?? | Soil (tailings deposition by wind, Silver Creek) |
Off Site, site vicinity |
Ingestion Inhalation, particulates |
US-40 constructors |
Past |
| Surface Soil | Tailings?? | Soil (tailings deposition by wind, Silver Creek) | Off Site, site vicinity |
Ingestion Inhalation, particulates |
Road maintenance workers, Nearest residents & employees |
Past Present Future |
| Creek surface water Off Site |
Site discharge? Upstream discharge to creek? | Water | Off Site, Silver Creek |
Ingestion | Maintenance workers, ranchers |
Past Present Future |
| Creek sediment Off Site |
Tailings? | Sediment & tailings | Off Site, downstream |
Ingestion | Maintenance workers, ranchers |
Past Present Future |
| Ambient air Off Site |
Tailings? | Air | Off Site, site vicinity |
Inhalation, particulates
|
Adjacent highway users & maintenance workers, Nearest residents & employees, Nearby recreational users. |
Past Present Future |
| Ambient air Off Site |
Tailings? | Air | Off Site, site vicinity |
Inhalation, particulates |
US-40 constructors |
Past |
| Food chain Off Site |
Water & forage intake | Food products (cattle, sheep, milk, grain) | Off Site | Ingestion foodstuff |
Consumers | Past Present Future |
| Food chain Off Site |
Tailings deposit? Other upstream sources | Fish | Off Site Residences |
Ingestion | Fishermen & families | Past Present Future |
TABLE 15a. ESTIMATED POPULATION FOR COMPLETED EXPOSURE
PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | aluminum | antimony | arsenic |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | air, soil, surface water, tailings |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil, air |
| Public water supply users; Atkinson well water | 248 | groundwater? | ||
| Public water supply users; High Valley well water | 250 | groundwater | ||
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | ||
TABLE 15b. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | barium | beryllium | cadmium |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil, air |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, air, soil |
| Public water supply users; Atkinson well water | 248 | groundwater | groundwater? | |
| Public water supply users; High Valley well water | 250 | groundwater | groundwater? | |
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | groundwater? | |
TABLE 15c. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | calcium | chromium | cobalt |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil |
| Public water supply users; Atkinson well water | 248 | groundwater | groundwater? | |
| Public water supply users; High Valley well water | 250 | groundwater | groundwater | |
| Public water supply users; Summit Co. #3 well water | 75 | groundwater? | ||
TABLE 15d. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | copper | iron | lead |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | air, soil, surface water, tailings, |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, air, soil |
| Public water supply users; Atkinson well water | 248 | groundwater? | groundwater | groundwater? |
| Public water supply users; High Valley well water | 250 | groundwater | groundwater | groundwater? |
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | groundwater | groundwater? |
TABLE 15e. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | magnesium | manganese | mercury |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water tailings, soil |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil |
| Public water supply users; Atkinson well water | 248 | groundwater | groundwater | groundwater |
| Public water supply users; High Valley well water | 250 | groundwater | groundwater | groundwater? |
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | groundwater | groundwater? |
TABLE 15f. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | nickel | potassium | silver |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil |
| Public water supply users; Atkinson well water | 248 | groundwater? | groundwater | groundwater? |
| Public water supply users; High Valley well water | 250 | groundwater | groundwater? | |
| Public water supply users; Summit Co. #3 well water | 75 | groundwater? | groundwater | groundwater? |
TABLE 15g. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | sodium | thallium | vanadium |
| Tailings workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil |
| Public water supply users; Atkinson well water | 248 | groundwater | ||
| Public water supply users; High Valley well water | 250 | groundwater | ||
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | ||
TABLE 15h. ESTIMATED POPULATION FOR COMPLETED EXPOSURE PATHWAYS
| Estimated Exposed Populations | ||||
| Location | Number | zinc | ||
| Tailings workers | unknown | surface water, air, tailings, soil | ||
| Site trespassers | unknown | tailings, soil, air | ||
| Public water supply users; Atkinson well water | 248 | groundwater | ||
| Public water supply users; High Valley well water | 250 | groundwater | ||
| Public water supply users; Summit Co. #3 well water | 75 | groundwater | ||
TABLE 16a. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE
PATHWAYS
Estimated
|
| ||||
| Location | Number | aluminum | antimony | arsenic | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | air, soil, surface water, tailings | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water, air | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil, groundwater, air | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, sediment, air | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, air, tailings | |
TABLE 16b. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | barium | beryllium | cadmium | |
| Site maintenance or remediation workers, or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | air, soil, surface water, tailings | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water, air | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil, air | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings, air | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, air, tailings | |
TABLE 16c. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | calcium | chromium | cobalt | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, tailings | |
TABLE 16d. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | copper | iron | lead | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | air, soil, surface water, tailings | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water, air | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil, groundwater, air | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings, air | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, air, tailings | |
TABLE 16e. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | magnesium | manganese | mercury | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, tailings | |
TABLE 16f. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | nickel | potassium | silver | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water | soil, sediment, surface water | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, tailings | |
TABLE 16g. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | sodium | thallium | vanadium | |
| Site maintenance or remediation workers; or future residents & workers | unknown | surface water, tailings, soil | surface water, tailings, soil | surface water, tailings, soil | |
| Site trespassers | unknown | tailings, soil | tailings, soil | tailings, soil | |
| Area residents | unknown | soil, sediment, surface water | soil, sediment, surface water? | soil, sediment, surface water? | |
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil | soil | soil | |
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | soil, sediment, surface water, tailings | |
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, tailings | surface water, sediment, tailings | surface water, sediment, tailings | |
TABLE 16h. ESTIMATED POPULATION FOR POTENTIAL EXPOSURE PATHWAYS
Estimated
|
|
||||
| Location | Number | zinc | |||
| Site maintenance or remediation workers; or future residents & workers | unknown | air, surface water, tailings, soil | |||
| Site trespassers | unknown | tailings, soil | |||
| Area residents | unknown | soil, sediment, surface water, air | |||
| Nearest residents * | 10 | ||||
| Nearest workers, 3 companies |
50 | soil, air | |||
| Road maintenance workers, Rt. 40 constructors |
unknown | soil, sediment, air, surface water, tailings | |||
| Fishermen, families ** | unknown | ||||
| Ranchers *** | unknown | surface water, sediment, air, tailings | |||
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