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HEALTH CONSULTATION

SWIFT AGRICULTURAL CHEMICALS FAIRMONT CITY PLANT
FAIRMONT CITY, ST. CLAIR COUNTY, ILLINOIS


CERTIFICATION

This Swift Agricultural Chemicals Corporation Site Health Consultation was prepared by theIllinois Department of Public Health under a cooperative agreement with the Agency for ToxicSubstances and Disease Registry (ATSDR). It is in accordance with approved methodology andprocedures existing at the time the health consultation was begun.

Gail D. Godfrey
Technical Project Officer
Division of Health Assessment and Consultation
ATSDR

The Division of Health Assessment and Consultation, ATSDR, has reviewed this health consultation and concurs with its findings.

Lisa C. Hayes for
Richard E. Gillig
Chief, State Programs Section
Division of Health Assessment and Consultation
ATSDR


APPENDICES

Table 1 Summary of Environmental Monitoring Results

Table 2 On-Site Soil and Sediment Sampling Results

Table 3 Off-Site Sediment Sampling Results

Table 4 1996 Groundwater Monitoring Results

Table 5 Calculated Doses and Health Guidelines

Table 6 Completed Exposure Pathways

Figure 1 Swift Agricultural Chemicals Corporation Site Location Map

Figure 2 Soil and Sediment Sample Location Map

Figure 3 1996 Soil and Groundwater Sampling Location Map


TABLES

In the data tables that follow, the listing of a contaminant does not mean that it will cause adverse health effects from exposures. The tables summarize data from both the 1989 and 1996 investigations. The tables include the following abbreviations:

J = estimated value, qualitatively correct but quantitatively suspect
B = analyte found in the associated blank and indicates possible/probable blank contamination
P = alternative analytical method used to analyze for this compound
C = Confirmed by GC/MS (for pesticides)
D = Analyzed at a secondary dilution factor
E = Estimated value of a compound that exceeded the calibration range
U = Compound analyzed for but not detected
N = Spiked sample
W = Post digestion spike for furnace AA analysis

Table 1.

Summary of Analyses Conducted at the Swift Agrichemical Facility
Compound/CV 1989 Samples taken by E & E (results in ppm) Sample Date June 4 and 5, 1996 (results in ppm)
Soil Soil OS Sed Sub-Soil Soil ONS Sed OS Sed OS Sed OS Sed OS Sed OS Sed SOIL(BKG) X101 X102 X103 X104 G101 G102 G103 G104 G105
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12
Methylene Chloride .006J .009 .027 .013 .005J .009J .030J - - .030J .028J .014 NA NA NA NA NA NA NA NA NA
Acetone - - .033 - .054 .046 .240J .057J - .210J .130J - NA NA NA NA NA NA NA NA NA
2-Butanone - - - - - - .022J - - .021J .021J - NA NA NA NA NA NA NA NA NA
Benzene - - .004J - - - - - - - - - NA NA NA NA NA NA NA NA NA
Tetrachoroethene - - - - - - - .013J - - - - NA NA NA NA NA NA NA NA NA
Toluene .005J .016 .036 .014 .11 - - .009J - .005J - - NA NA NA NA NA NA NA NA NA
Ethyl Benzene - - .005J - - - - - - - - - - - - - - - - - 0.003J
Xylenes (total) - - .022 - - - - - - - - - - - - - .003J - - - -
SEMIVOLATILES
Phenol NA NA NA NA NA NA NA NA NA NA NA NA - - .042J - .0005J - .0006J - -
4-Methylphenol NA NA NA NA NA NA NA NA NA NA NA NA - .094J - .065J - - - - -
2-Nitrophenol NA NA NA NA NA NA NA NA NA NA NA NA - - - - - - - .0005J -
2,4-Dichlorophenol - - - - - - - - - 1.3 - - .1J .094J .042J .058J - - .0001J - -
1,2,4-Trichlorobenzene NA NA NA NA NA NA NA NA NA NA NA NA - - .054J - - - - - -
Naphthalene - 0.082J - - - - - - .13J .36J .17J .04J .048J .12J .11J .07J .005J .003J - - -
4-Chloro-3-
Methylphenol
- - - - .2J - - - - - - - - .06J - .04J - - - - -
2-Methylnaphthalene - .046J - - - - - 13J .29J .87J .11J .045J .054J .13J .098J .077J .012 .006J - - -
2,4,6-Trichlorophenol NA NA NA NA NA NA NA NA NA NA NA NA .055J - - - - - - - -
2-Chloronaphthalene NA NA NA NA NA NA NA NA NA NA NA NA - - - - .001J .0007J - - -
Acenaphthalene - .045J - - .1J - - - - - - - - .01J .45J .1J - - - - -
Acenaphthene - - - - .087J - - - .17J .21J .1J - - - .04J - .018 .013 - - -
2,4-Dinitrophenol NA NA NA NA NA NA NA NA NA NA NA NA - - - - - - - .002J -
Dibenzofuran - - - - - - - - .23J .27J .11J - .041J .068J - .041J .01 .009J - - -
Diethyl Phthalate - - - - - - - - - - .45J - .034J .04J .036J - .001J - - - .002J
Fluorene - - - - - - - 3.7J .24J .27J .16J - - .069J .047J .046J .014 .011 - - -
N-Nitrosodiphenyl
amine
NA NA NA NA NA NA NA NA NA NA NA NA - .064J - - .016 - - - -
Hexachlorobenzene - .098J - - .24J - - - - - - - - .66J .16J .38J - - - - -
Pentachlorophenol NA NA NA NA NA NA NA NA NA NA NA NA 5.1 .036J - - - - - - -
Phenanthrene .66 .26J - - 1.1 - .67J 14J 3.6 4.3 1.3 .051J .041J 1.5 .57J .87 .045 .032 - - -
Anthracene .12J - - - .26J - - - .63 .52J .25J - .074J .39J .72 .25J .005J .003J - - -
Carbazole NA NA NA NA NA NA NA NA NA NA NA NA .048J .27J .13J .18J .02 .017 - - -
Di-n-butyl phthalate - - - - - - - - - .17J - - 2 - - .039J - .0006J - - -
Fluoranthene 2.3 .29J - 2.7 1.8 .78J 2J - 3.8 5.2 1.9 .05J .49J 3.9 1.1 2.6D .009J .0005J - - -
Pyrene 3.9J .48 .5J 3.9J 1.9J .87J 2.6J - 3.4 4J 2J .055J .52J 3.7 1.5 2.3D .002J .001J - - -
Butylbenzyl Phthalate .16J - - - - - - - - - .23J - - .22J .08J .18J - - - - -
Benz(a)Anthracene 1.2J .23J - .64J 1.1 - 1.7J - 1.7 1.8 .95 - .22J 2.1 1.4 4.3 - - - - -
bis(2-ethylhexyl) phthalate 6.1J 1.4 .6J 5 .27J - 3.4J - 4.3 1.6 2.5 - 1.6 2.3 2.1 1.7 - - - - -
Chrysene 2J .36J .33J .83J .99 1.7J 2.6J - 1.6 1.8 1.1 .046J .44J 3.4 2.2 2.2 - - - - -
Benzo(b)Fluoranthene 2.8J .43J .29J .26J 1.2 - 5.3 - 1.8 1.7 1.2 .066J .31J 4.8 2.3 3 - - - - -
Benzo(k)Fluoranthene 1.3J .31J - .25J .8J 1.3J - - 1.2 .53J .85 - .51J 3.5 1.5 2 - - - - -
Benzo(a)Pyrene 1.7J .27J - .35J .62J .84J 21J - 1.2 .63J .99 - .18J 3.1 1.6 1.9 - - - - -
Indeno(1,2,3-cd)
Pyrene
1.4J .32J - - .53J - 1.8J - .84 .83J .76 - .075J 3.1 1.1 1.8 - - - - -
Benzo(g,h,i)Perylene - .32J - - .43J - 1.8J - .8 .44J - - .38J 3.5 1.2 1.9 - - - - -
Dibenz(a,h)Anthracene .24J - - - - - - - .19J - .13J - .15J - .58J - - - - - -
PESTICIDES/PCBs
Alpha-BHC NA NA NA NA NA NA NA NA NA NA NA NA .0011JP .0054JP .004J 1.2C - - .000006

JP

.000079P -
Beta-BHC NA NA NA NA NA NA NA NA NA NA NA NA .0026JP .0098JP .008JP .032 - .000009

JP

- .00004JP -
Delta-BHC NA NA NA NA NA NA NA NA NA NA NA NA .012JP .044P .019JP .09P .000005

JP

- - - -
Gamma-BHC NA NA NA NA NA NA NA NA NA NA NA NA - - - .19 .000038

JP

- - .000008J .000004J
Heptachlor - - 4.8DC - - - .051 - - - - - .17 .059 .037 .011JP - - - .000005

JP

.000015J
Aldrin NA NA NA NA NA NA NA NA NA NA NA NA 3.9PEC .31P .14P .0059JP - - - - -
Heptachlor Epoxide NA NA NA NA NA NA NA NA NA NA NA NA .03P .021JP .016JP .039P .000009

JP

- - - -
Dieldrin .39 .25 .29 - 1.4J 4D .34DJ .27 .088 .36 .21 - - .33UX .32 - - - - - -
4,4'-DDE NA NA NA NA NA NA NA NA NA NA NA NA .0062JP .013JP .0084JP .0051JP - - - - -
Endrin NA NA NA NA NA NA NA NA NA NA NA NA - - - .0047JP - .000004J - - -
Endosulfan Sulfate NA NA NA NA NA NA NA NA NA NA NA NA .0084JP - - - - - - - -
4,4'-DDD - - - - - - - - .049 1.5DJ - - .0059JP .012JP .0068J - - - - - -
4,4'-DDT - - - - - - - - .033J 1.7DJ - - 0.12 .0074JP - - - - - - -
Methoxychlor NA NA NA NA NA NA NA NA NA NA NA NA .021JP .016JP .0071JP .0059JP - - - - -
Endrin Ketone NA NA NA NA NA NA NA NA NA NA NA NA - .035JP .018JP .022J - - - - -
alpha-Chlorodane - - - - - - - - - - .027J - .046P .056P .061P .0028JP - - - - -
gamma'Chlorodane .23J - 1.7DJ - .16J .35J .43DJ .14J .0064J - .035J - .31PE .33UX .34 .012JP .000009J .000015

JP

- - -
INORGANICS
Antimony 13.4B - - - - - - - - 12.2B - - 6.5B 14.9B 14.5B 47.5 16.1B - - - -
Arsenic 13.7JNWB 6.2JNB 4.4JN - 28.5JN 13.3JNB 26.9JNB 24.6J+N 18.6JN 27.8JN 5.5JN 8.4JN 30.9 17.9 18.7 25.3 27.8 46 14.8 30.9 -
Barium 121 83.9 458 628 179 585 197 345 304 571 159 116 447 177 172 248 531 478 27.7B 24.3B 40.1B
Beryllium 1.8 1.6 .56B 3.1 1.3 2.1 2.1B 1.7B .45B .74B .89B .48B .7B 1.4B 1.3B 1B - - 1.8B 1.7B .6B
Cadmium 28.7 27.8 14 13.7 67 76.2 344 330 5.7 6.4 14.1 - 19.2 35.3 33.4 37.3 - - 3150 193 29.2
Chromium,trivalent hexavalent51.6 48 33.3 397 56.8 83 76.6 455 29.5 90.1 46.9 15.3 68.1 77.7 63.1 44.8 - - - 7.2B -
Cobalt 14 6.7B 3.2B 27.6B 11.5B 9.1B 6.5B 11B 3.3B 4.1B 3.6B 8.3B 9.9B 10.5B 10.1B 10.5B - - 91.4 53.7 56.5
Copper 1,530J* 688J* 112J* 84.8J* 618J* 457J* 728J* 446J* 144J* 359J* 187J* 18.9J* 336 1,680 968 452 3.3B 1.9B 4.5B 100 55.7
Lead 523JN 1,790JN 526JN 281JN 3,510JN 1,300JN 1,667JN 2,200JN 669JN 1,800JN 2,030JN 35.3JN 1,010 887 793 1,200 203B 1.6B 2.8B 1.5B 3.8
Manganese 3,980 2,650 462 1,830 883 254 930 735 182 118 754 785 806 1,820 1,830 481 3,070 4,180 11,500 6,070 3,130
Mercury .4JN .6JN 5.3JN - 6.4JN 2.7JN 8.8JN 12JN 6.2JN 10JN .5JN - 2.1 .6 .5 .2 - - - - -
Nickel 59.4 32 22.2 79.7 39.3 8.2B 21.9B 26.6 8.9B 3B 13.9 15.7 40.4 56.2 60.9 28.2 - - 236 183 106
Selenium - - .35JNWB - - - 3.1JNB 1.8JNB .57
JNWB
.91
JNWB
- - 1.3B 1.4B 1.1B .7B - - 1.6B - -
Silver 31.5J*N 2.2J*NB 1.4J*NB 3.4J*NB 6.6
J*N
6J*N 12J*N 7.2J*N 2.2J*N 2.6J*NB 3.9J*N - .9B 4.3 9.1 1.1B - - - - -
Thallium 1.2J+B - - - 2J+B - 2.4JWB 1.3JWB .7JWB - - - - .4B .6B .2B - - - - .8B
Vanadium 59.3 56.2 38.3 124 43.6 119 85.4 77.2 28.5 61.4 45.9 21.5 68.7 66.7 64 54.2 2.1B 2.8B 5.8B 16.2B -
Zinc 8,210 27,400 3,760 2,660 21,600 8,230 32,700 23,400 839 1,370 1,680 147 4,590 9,320 9,480 16,000 10.2B 9B 121,000 31,500 731
Cyanide - 2.0JN - 4.2JN 1.1JN 2.3JN - - - - - - 2.7 1.2 1 1.2 .9B 2.7B 5.6 27.2 7
ppm - parts per million
-: compound analyzed, but not detected in the sample


Table 2.

Onsite Soil and Sediment Contaminants of Concern for Swift Agricultural Chemical Facility
Compound/CV Soil Soil Sub-Soil Soil ONS Sed SOIL (BKG) X101 X102 X103 X104 Field Blank Comparison Value
Soil (ppm)
Source
S1 S2 S4 S5 S6 S12
SEMIVOLATILES
Benzo(a)Pyrene 1.7J .27J .35J .62J .84J - .18J 3.1 1.6 1.9 - 0.1 CREG
PESTICIDES/PCBs
Heptachlor - - - - - - .17 .059 .037 .011JP - 0.2 CREG
Aldrin NA NA NA NA NA NA 3.9PEC .31P .14P .0059JP - 0.06/2/20 RMEG
Heptachlor Epoxide NA NA NA NA NA NA .03P .021JP .016JP .039P - 0.08 CREG
Dieldrin .39 .25 - 1.4J 4D - - .33UX .32 - - 0.1/3/40:0.04 CEMEG/CREG
INORGANICS
Antimony 13.4B - - - - - 6.5B 14.9B 14.5B 47.5 - 0.8/20/300 RMEG
Arsenic 13.7JNWB 6.2JNB - 28.5JN 13.3JNB 8.4JN 30.9 17.9 18.7 25.3 - 0.6/20/200 C EMEG
Beryllium 1.8 1.6 3.1 1.3 2.1 .48B .7B 1.4B 1.3B 1B - 0.2 CREG
Cadmium 28.7 27.8 13.7 67 76.2 - 19.2 35.3 33.4 37.3 - 1/40/500 C EMEG
Lead 523JN 1790JN 281JN 3510JN 1300JN 35.3JN 1,010 887 793 1,200 1.6B NONE NONE
Manganese 3980 2650 1830 883 254 785 806 1,820 1,830 481 1B 300/7,000/100,000 rmeg
Thallium 1.2J+B - - 2J+B - - - .4B .6B .2B - NONE NONE
Zinc 8,210 27,400 2,660 21,600 8,230 147 4,590 9,320 9,480 16,000 17.8B 600/20,000/200,000 I EMEG & RMEG
NA: Compound not analyzed for in the sample.
- : Compound analyzed, but not detected in the sample.
ppm - parts per million

Table 3.

Off-site Sediment Contaminants of Concern for Swift Agricultural Chemical Facility (in ppm)
Compound/CV OS Sed OS Sed OS Sed OS Sed OS Sed OS Sed Field Blank Comparison Value
S3 S7 S8 S9 S10 S11 Soil Concentration Source
SEMIVOLATILES
Benzo(a)Pyrene - 21J - 1.2 .63J .99 - 0.1 CREG
PESTICIDES/PCBs
Heptachlor 4.8DC .051 - - - - - 0.2 CREG
Aldrin NA NA NA NA NA NA - 0.06/2/20 RMEG
Heptachlor Epoxide NA NA NA NA NA NA - 0.08 CREG
Dieldrin .29 .34DJ .27 .088 .36 .21 - 0.1/3/40:0.04 CEMEG/CREG
INORGANICS
Antimony - - - - 12.2B - - 0.8/20/300 RMEG
Arsenic 4.4JN 26.9JNB 24.6J+N 18.6JN 27.8JN 5.5JN - 0.6/20/200 C EMEG
Beryllium .56B 2.1B 1.7B .45B .74B .89B - 0.2 CREG
Cadmium 14 344 330 5.7 6.4 14.1 - 1/40/500 C EMEG
Lead 526JN 1,667JN 2,200JN 669JN 1,800JN 2,030JN 1.6B NONE NONE
Manganese 462 930 735 182 118 754 1B 300/7,000/100,000 rmeg
Thallium - 2.4JWB 1.3JWB .7JWB - - - NONE NONE
Zinc 3,760 32,700 23,400 839 1,370 1,680 17.8B 600/20,000/200,000 I EMEG & RMEG
NA: Compound not analyzed for in the sample.
- : Compound analyzed for, but not detected in the sample.
ppm - parts per million

Table 4.

June 4 and 5, 1996 Groundwater Sample Results (in ppb).
Compound/CV G101 G102 G103 G104 G105 Field
Blank
Comparison Value
for Water (ppb)
Source
SEMIVOLATILES
Benzo(a)Pyrene - - - - - - 0.000005 CREG
PESTICIDES/PCBs
Heptachlor - - - .000005JP .000015J - 0.000008 CREG
Aldrin - - - - - - 0.000002/0.0003 CREG/C
EMEG
Heptachlor Epoxide .000009JP - - - - - 0.000004 CREG
Dieldrin - - - - - - 0.000002 CREG
INORGANICS
Antimony 0.016B - - - - - 0.004/0.010 RMEG
Arsenic 0.0278 0.046 0.015 0.031 - - 0.003/0.010
0.00002
CEMEG
CREG
Beryllium - - 0.0018B 0.0017B .0006B - 0.000008 CREG
Cadmium - - 3.150 0.193 0.029 - 0.07/0.02 CEMEG
Lead 0.203B 0.0016B 0.0028B 0.0015B 0.0038 0.0016B NONE NONE
Manganese 3.070 4.180 11.500 6.070 3.130 0.001B 0.050/0.200 RMEG
Thallium - - - - .0008B - 0.0004 LTHA
Zinc 0.0102B 0.009B 121.0 31.500 0.731 0.0178B 3/10 I EMEG
- Compound not detected in the sample.
ppb = parts per billion

Table 5.

Calculated Doses and a Comparison to Health Guidelines
Compound/CV Sediment Concentration Range (in ppm) Estimated
Ingestion Dose
(in mg/kg/day)
Health Guidelines USEPAs Oral Slope Factor Estimated Increased Cancer Risk Exceeds
The
MRL/RfD
Source Health Guideline for Soil in mg/kg/day
SEMIVOLATILES
Benzo(a)Pyrene ND - 21J 2.6 X 10-6 Acute Oral MRL 0.1 7.3 1.9 X 10-5 NO
PESTICIDES/PCBs
Heptachlor ND - 4.8DC 6 X 10-7 C.O. MRL 0.0005 4.5 2.7 X 10-6 NO
Aldrin NA/3.9 (3) NE/4.9 X 10-7 Chronic Oral MRL NE 17 NE/8.3 X 10 -6 NO
Heptachlor Epoxide NA/0.039(3) NE/4.9 X 10-9 C.O. MRL 0.000013 9.1 NE/4.5 X 10-8 NO
Dieldrin 0.088-0.36 4.5 X 10 -8 C.O. MRL .00005 16 7.2 X 10-7 NO
INORGANICS
Antimony ND-12.2 1.5 X 10-6 Chronic Oral RFD 0.0004 N Appl N Appl NO
Arsenic 4.4JN-27.8JN 3.4 X 10-6 Chronic Oral MRL 0.0003 1.5 5.1 X 10-6 NO
Beryllium 0.45B-2.1B 2.6 X 10-7 Chronic Oral RFD 0.005 4.3 1.1 X 10-6 NO
Cadmium 5.7-344 4.3 X 10-5 C.O. MRL 0.0007 None None NO
Lead 526-2,200 2.7 X 10-4 NAV NAV NAV - NO
Manganese 182-930 1.16 X 10-4 NAV NAV N Appl N Appl NO
Thallium ND-2.4JWB 3.0 X 10-6 NAV NAV N Appl N Appl NO
Zinc 17.8B-32700 4 X 10-3 C.O. MRL 0.3 N Appl N Appl NO
Total Cancer Risk 3.6 X 10-5 NO
NA: Compound not analyzed for in the sample. 3 - Highest On-site soil results substituted twice it was not analyzed for in sample
1 - See attached sheet with calculations and assumptions 4 - Assumes similar mechanisms and cancer types
2 - Calculated using highest sediment concentration
NE - Not estimated
N Appl - Not Applicable
NAV - Not Available

Table 6.

Completed Exposure Pathways
Pathway Name: Source Medium Exposure Point Exposure Route Receptor Population Time of Exposure Exposure Activities Estimated Number Exposed Chemicals (identify by name or reference to table in document)
On-site Surface Soil & Sediment Contaminated Soil & Sediment Soil & Sediment On the site Ingestion
Inhalation
On-site Workers Past
Present
Future
Working outside on the site 25 Table 2
Off-site Sediment Contaminated sediment off the site Sediment Children playing in sediment areas. Ingestion
Inhalation
Area Children Past
Present
Future
Playing in and with sediments 20 Table 3


Figure 1. Swift Agricultural Chemicals Corporation Site Location Map


Figure 2. Soil and Sediment Sample Location Map


Figure 3. Soil and Groundwater Samples taken by IEPA in 1996



ATTACHMENT 1

CONCLUSIONS AND RECOMMENDATIONS
FROM OLD AMERICAN ZINC HEALTH CONSULTATION

CONCLUSIONS

Based on information reviewed, the Illinois Department of Public Health concludes that:

  1. The Old American Zinc site in Fairmont City, Illinois poses a public health threat based on chronic exposure of children to arsenic, cadmium, and lead in the residential soils.
  2. Nearby residents are exposed to contaminated airborne particulates which originate onsite. This exposure would be the highest during dry windy periods or when site activity is high. The extent of this exposure and resulting health effects (if any) cannot be determined without sufficient air monitoring data.
  3. Worker exposure to on-site contaminants certainly occurs. The highest exposures would likely occur during activities which disturb the waste material.
  4. Exposures to site related contaminants would have likely been higher in the past,particularly during smelter operation.

RECOMMENDATIONS

Cease/Reduce Exposure Recommendations

  1. Reduce exposure of children to contaminated residential soils as much as possible by using appropriate reduction methods (e.g. covering bare soil with vegetation, "clean" soil, mulch, rock, or asphalt; restricting access to areas with bare soil by fencing; reducing or eliminating soil contact activities such as digging; washing hands and face prior to eating or drinking; and cleaning shoes to reduce the amount of soil being tracked into the house.
  2. Remove or contain contaminants that have been left exposed on the surface soil in such a way that they are not released to the air or allowed to move by surface run-off.
  3. Protect both the on-site workers and nearby residents from site contaminant exposure bytaking precautions (e.g. dust reduction methods, protective equipment) to reduce exposuresduring any on-site activities that involve disturbing the site wastes.

Site Characterization Recommendations

  1. Monitoring of air at exposure points to determine airborne exposure to contaminants. Exposure points would include nearby residences and, if warranted, onsite workers. Baseline air monitoring would be important in determining exposure and could later be used with additional air monitoring to determine the effectiveness of the chosen remedial activity.
  2. Performing additional soil sampling in the neighborhoods adjacent to the site to provide a more accurate determination of the extent of off-site soil contamination.
  3. Performing additional sampling for mercury in the arsenic leaching area to determine the extent of mercury contamination in that area.

ATTACHMENT 2

Comparison Values Used in Screening Contaminants for Further Evaluation

Environmental Media Evaluation Guides (EMEGs) are developed for chemicals based on their toxicity, frequency ofoccurrence at National Priority List (NPL) sites, and potential for human exposure. They are derived to protect the mostsensitive populations and are not cut off levels, but rather comparison values. They do not consider carcinogeniceffects, chemical interactions, multiple route exposure, or other media-specific routes of exposure, and are veryconservative concentration values designed to protect sensitive members of the population.

Reference Dose Media Evaluation Guides (RMEGs) are estimates of a daily oral or inhalation exposure to a particularchemical that is unlikely to produce any noncarcinogenic adverse health effects over a lifetime. They are conservativevalues designed to protect sensitive members of the population.

Cancer Risk Evaluation Guides (CREGs) are estimated contaminant concentrations based on a one excess cancer in amillion persons exposed to a chemical over a lifetime. These are also very conservative values designed to protectsensitive members of the population.


ATTACHMENT 3.

Calculations for Exposure to Off-site Sediments Based on a 16 kilogram Child
Ingestion Dose (ID) = Concentrations X Ingestion Rate (IR) X Exposure Factor (EF) X 10-6
Body Weight (BW)

Where IR is 100 mg; BW is 16 kg; and the EF is 0.02

EF = Exposure Frequency X Exposure Duration/Exposure Time
EF = 2 days/week X 26 weeks X 10 years/365 days X 70 years
EF = 520/25550
EF = 0.02

ID = concentration x (IR X EF X 10-6)
BW

ID = Concentration (0.125 X 10-6)

ID = (Concentration) 1.25 X 10-7

Antimony

ID = 12.2 (1.25 X 10-7/day)
= 1.5 X 10-6 mg/kg/day

Arsenic

ID = 27.8 mg/kg (1.25 X 10-7/day)
= 3.4 X 10-6 mg/kg/day

Beryllium

ID = 2.1 mg/kg (1.25 X 10-7/day)
= 2.6 X 10-7 mg/kg/day

Cadmium

ID = 344 mg/kg (1.25 X 10-7/day)
= 4.3 X 10-5 mg/kg/day

Lead

ID = 2,200 mg/kg (1.25 X 10-7/day)
= 2.75 X 10-4 mg/kg/day

Manganese

ID = 930 mg/kg (1.25 X 10-7/day)
= 1.16 X 10-4 mg/kg/day

Thallium

ID = 2.4 mg/kg (1.25 X 10-7/day)
= 3.0 X 10-6 mg/kg/day

Zinc

ID = 32,700 mg/kg (1.25 X 10-7/day)
= 4.0 X 10-3 mg/kg/day

Benzo(a)pyrene

ID = 21 mg/kg (1.25 X 10-7/day)
= 2.6 X 10-6 mg/kg/day

Heptachlor

ID = 4.8 mg/kg (1.25 X 10-7/day)
= 6 X 10-7 mg/kg/day

Heptachlor epoxide1

ID = 0.039 mg/kg (1.25 X 10-7/day)
= 4.9 X 10-9 mg/kg/day

Aldrin1

ID = 3.9 mg/kg (1.25 X 10-7/day)
4.9 X 10-7 mg/kg/day

Dieldrin

ID = 0.36 mg/kg (1.25 X 10-7/day)
4.5 X 10-8 mg/kg/day

1 - Not analyzed for in off-site sediment, concentration used is highest on-site soil.

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