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HEALTH CONSULTATION

CHILDS PROPERTY
ALORTON, ST. CLAIR COUNTY, ILLINOIS




Table 1.

Contaminants of Concern in Surface Soil at the Childs Property Site
Compound X001 Back-ground X101 X102 X103 X104 X105 X106 X107 X108 Comparison Value
Soil ppm Source
SEMIVOLATILES
Benzo(a)Anthracene -- 0.490 0.540 0.065 J 0.110 J 0.041 J 1.700 0.120 J 5.500 NONE NONE
Chrysene -- 0.650 680 97 J 0.120 J 0.061 J 1.800 0.130 J 5.400 NONE NONE
Benzo(b)Fluoranthene -- 0.810 0.750 0.180 J 0.190 J 0.120 J 2.100 0.170 J 7.500 NONE NONE
Benzo(k)Fluoranthene -- 0.490 0.540 -- -- -- 1.300 0.091 J 2.300 NONE NONE
Benzo(a)Pyrene -- 0.620 0.620 0.068 J 0.093 J 0.050 J 1.500 0.130 J 5.400 0.1 CREG
Indeno(1,2,3-cd)Pyrene -- 0.530 0.540 0.058 J 0.058 J 0.044 J 1.100 0.120 J 4.500 NONE NONE
Dibenz(a,h)Anthracene -- 0.160 J 0.160 J 0.024 J -- -- 0.360 J 0.039 J 2.000 NONE NONE
INORGANICS
Zinc 109 418 394 -- 51,800 130 1,240 366 715 600/20,000/200,000* I EMEG

*Comparison values are for pica child/child/adult.
J = estimated value; qualitatively correct but quantitatively suspect
B = analyte found in the associated blank and indicates possible blank contamination




Table 2.

Relative Potency and Cancer Risk for PAH Exposure in Soil
Compound Relative Potency Value Concentration Range (ppm) Relative
Potency Concentration1
Dose for
Child
(mg/kg/day)
Dose for
Adult (mg/kg/day)
Excess Cancer Risk2
For Child For Adult
Benzo(a)Anthracene 0.01 0.04-5.5 0.06 1.2 X 10-5 3.6 X 10-9 8.8 X 10-8 2.6 X 10-9
Chrysene 0.01 0.06-5.4 0.05 1 X 10-8 3 X 10-9 7.3 X 10-8 2.2 X 10-9
Benzo(b)Fluoranthene 1.0 0.12-7.5 7.5 1.5 X 10-6 4.5 X 10-7 1.1 X 10-5 3.3 X 10-6
Benzo(k)Fluoranthene 0.01 ND-2.3 0.02 4 X 10-9 1.2 X 10-9 2.9 X 10-8 8.8 X 10-9
Benzo(a)Pyrene 1.0 0.05-5.4 5.4 1.1 X 10-6 3.2 X 10-7 8 X 10-6 2.4 X 10-6
Indeno(1,2,3-cd)Pyrene 0.01 0.04-4.5 0.05 1.2 X 10-8 3 X 10-7 8.8 X 10-8 2.2 X 10-9
Dibenz(a,h)Anthracene 1.0 ND-2.0 2.0 4 X 10-7 1.2 X 10-8 2.9 X 10-6 8.3 X 10-6
Total RP as B(a)P 15.08 3 X 10-6 9.0 X 10-7 2.2 X 10-5 6.6 X 10-6

1 Based on highest concentration
2 The Cancer slope factor for B(a)P of 7.3 were used to determine cancer risk.
ppm = parts per million
mg/kg/day = milligrams of chemical per kilogram of body weight per day of exposure

Exposure Dose Calculations

Ingestion Dose = Concentration x Ingestion Dose x EF x 10-6
Body Weight

Child Ingestion Dose
EF = 2 days/week x 26 weeks x 10 years (365 days x 70 years) = 0.02

Ingestion Dose = PAH Concentration x (100 mg x 0.02 x 10-6)
10 kg
= PAH Concentration x 2 x 10-7 mg/kg/day

Adult Ingestion Dose
EF = 2 days/week X 52 weeks X 10 years/(365 days X 70 years) = 0.04

Ingestion Dose = PAH Concentration x (100 mg X 0.04 X 10-6)
70 kg
= PAH Concentration x 6 X 10-8 mg/kg/day


Table 3.

Potential Exposure Pathways
Source ofContaminationEnvironmental TransportPathwaysExposurePathwaysPossible ReceptorsTime
Childs PropertySurface Soil Ingestion
Dermal contact
Trespassers,
Future on-site workers
(estimated number of
possible receptors =30)
Past
Present
Future



ATTACHMENT 1

Comparison Values Used In Screening Contaminants For Further Evaluation

Environmental Media Evaluation Guides (EMEGs) are developed for chemicals based on theirtoxicity, frequency of occurrence at National Priority List (NPL) sites, and potential for humanexposure. They are derived to protect the most sensitive populations and are not cut-off levels,but rather comparison values. They do not consider carcinogenic effects, chemical interactions,multiple route exposure, or other media-specific routes of exposure, and are very conservativeconcentration values designed to protect sensitive members of the population.

Reference Dose Media Evaluation Guides (RMEGs) are another type of comparison valuederived to protect the most sensitive populations. They do not consider carcinogenic effects,chemical interactions, multiple route exposure, or other media-specific routes of exposure, andare very conservative concentration values designed to protect sensitive members of thepopulation.

Cancer Risk Evaluation Guides (CREGs) are estimated contaminant concentrations based on aone excess cancer in a million persons exposed to a chemical over a lifetime. These are also veryconservative values designed to protect sensitive members of the population.


Figure 1. Childs Property Site Location Map


Figure 2. Childs Property Surface Soil Sample Location Map



CERTIFICATION

This Childs Property Health Consultation was prepared by the Illinois Department of Healthunder Cooperative Agreement with the Agency for Toxic Substances and Disease Registry. It isin accordance with approved methodology and procedures existing at the time the HealthConsultation was initiated.

Gail D. Godfrey
Technical Project Officer
SPS, SSAB, DHAC

The Division of Health Assessment and Consultation (DHAC), ATSDR, has reviewed this Health Consultation and concurs with its findings.

Richard Gillig
Chief, SPS, SSAB, DHAC, ATSDR


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