HEALTH CONSULTATION

DECATUR/BARDING & SPAWR LANDFILL
DECATUR, MACON COUNTY, ILLINOIS

FIGURES, ATTACHMENTS, AND TABLES

Figure 1. Site Location Map

Figure 2. Site Layout

Figure 3. Sampling Locations

Figure 4. Approximate Sample Locations

Attachment 1

Comparison Values Used in Screening Contaminants for Further Evaluation

Maximum Contaminant Levels (MCLs) are national primary drinking water regulations issued by USEPA under theauthority of the Safe Drinking Water Act. They are enforceable drinking water regulations that are protective of publichealth (considering the availability and economics of water treatment technology) over a lifetime (70 years) at an exposurerate of 2 liters of water per day. MCLs apply to all public water systems including community water systems and transientand non-transient non-community water systems.

Minimal Risk Level (MRL) is an estimate of daily exposure of a human being to a chemical that is likely to be without anappreciable risk of deleterious effects (noncarcinogenic) over a specified duration of exposure.

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 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 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 protect sensitivemembers of the population.

Table 1.

Contaminants of Concern found in the Groundwater--Site Screening Inspection [1]

Contaminants	Location/Concentration (µg/L)							Comparison Value
	GW01	GW02	GW03	GW04	GW05	GW06	GW08	µg/L	Source
Antimony	34.9	19.5	26.5	28.7	29.1	23.8	18.4	6.0	MCL
Arsenic	ND	ND	ND	ND	ND	ND	94.3	50 3.0 10	MCL EMEGc EMEGa
Manganese	233	4890	1280	5840	386	ND	ND	150	MCL

ND - Not Detected
MCL - Maximum Contaminant Level
EMEGc - for a child
EMEGa - for an adult
µg/L - micrograms per liter

Table 2.

Inorganic Contaminants of Concern found in Soil and Sediment--Site Screening Inspection [1]

Contaminants	Location/Concentration (ppm)								Comparison Value
	ST01	ST02	ST03	ST04 (Bkgd)	SS01	SS02	SS03	SS04 (Bkgd)	ppm	Source
Arsenic	5.0	14.1	49.3	8.5	5.1	3.7	7.1	3.7	0.5 20 200	CREG EMEGc EMEGa

EMEGc - for a child
EMEGa - for an adult
ppm - parts per million
Bkgd - Background sample

Table 3.

Contaminants of Concern found in the Groundwater--STEP [2]

Contaminants	Location/ Concentration (µg/L)			Comparison Value
	G101	G102	G103 (dup)	µg/L	Source
Benzene	ND	11.0	9.0	5.0	MCL
Antimony	9.8	11.9	11.1	6.0	MCL
Manganese	1,650	ND	ND	150	MCL
Selenium	ND	ND	54.2	50	MCL
Thallium	ND	35.5	39.3	2.0	MCL

ND - Not detected
µg/L - micrograms per liter
MCL - Maximum Contaminant Level
dup - duplicate sample

Table 4.

Contaminants of Concern found in the Soil and Sediment--STEP [2]

Contaminants	Location/Concentration (ppm)								Comparison Value
	X101 (Bkgd)	X102	X103 (dup)	X105	X201	X202	X203	X204	ppm	Source
Acenaphthylene	ND	ND	ND	ND	0.053	0.090	0.047	ND	0.005	ATSDR
Phenanthrene	ND	1.3	0.16	0.51	ND	0.21	0.37	ND	0.14	ATSDR
Chrysene	ND	ND	ND	ND	0.71	ND	ND	ND	0.64	ATSDR
Benzo(a)pyrene	ND	0.59	0.14	ND	0.77	0.82	0.56	ND	0.1 1.3	CREG ATSDR
Arsenic	7.9	7.5	6.8	2.6	2.7	7.2	4.7	31	0.5 20 200	CREG EMEGc EMEGa
Beryllium	0.68	0.67	0.67	0.49	0.45	0.82	0.65	0.6	0.2 9.9	CREG IEPA

ND - Not detected
ppm - parts per million
ATSDR - Agency for Toxic Substances and Disease Registry PAH Toxicological Profile
EMEGc - for a child
EMEGa - for an adult
IEPA - Illinois Environmental Protection Agency
dup - duplicate sample

Table 5.

Potential Exposure Pathways

Pathway name	Exposure Pathway Elements					Time
	Source	Environmental medium	Point of exposure	Route of exposure	Exposed population
Private Wells	Site	Groundwater	Homes	Ingestion	Area Residents (estimated number of persons potentially exposed = 100)	Past Present Future

Table of Contents