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HEALTH CONSULTATION

OLD LASALLE DUMP
LASALLE, LASALLE COUNTY, ILLINOIS


APPENDICES

Attachment 1 Site Location Map

Attachment 2 Sample Location Map

Attachment 3 Background Soil Sample Location Map

Attachment 4 Sediment and Surface Water Sampling Location Map

Attachment 5 Groundwater and Soil Sample Location Map

Attachment 6 Description of Comparison Values Used in Selecting Contaminants

Table 1 Results of 1992 IEPA SSI Soil Sampling

Table 2 Results of November 1995 Soil and Sediment Sampling

Table 3 Results of 1996 Groundwater Sampling

Table 4 Completed Exposure Pathways Information



Attachment 1 Site Location Map


Attachment 2 Sample Location Map


Attachment 3 Background Soil Sample Location Map


Attachment 4 Sediment and Surface Water Sampling Location Map


Attachment 5 Groundwater and Soil Sample Location Map

ATTACHMENT 6

Comparison Values Used In Selecting Contaminants

Environmental Media Evaluation Guidelines (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 another type of comparison value derived to protect the mostsensitive populations. They do not consider carcinogenic effects, chemical interactions, multiple route exposure, or othermedia-specific routes of exposure, and are very conservative concentration values designed to protect sensitive members ofthe 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.

1992 IEPA SSI Sampling/Old LaSalle Dump
Chemical Name Samples of
Detection
Maximum
Detected
Concentration
Comparison
Value
Source of
Comparison
Value
Benzo(b)fluoranthene X110 2.5 ppm n/a n/a
Benzo(a)pyrene X110 2.7 ppm 0.1 ppm CREG
Indeno(1,2,3-cd)pyrene X110 1.3 ppm n/a n/a
Heptachlor Epoxide X107 15 ppm 9 ppm RMEG
4,4'-DDE X106 20 ppm 2 ppm CREG
Arochlor-1221 X106-108 34 ppm 10 ppm EMEG
Arochlor-1248 X109, X114 160 ppm 10 ppm EMEG
Arochlor-1260 X106, X109 38 ppm 10 ppm EMEG
Chromium X114 417 ppm 300 ppm RMEG
Copper X106-108,
X110, X114
2230 ppm <2.93-156
ppm
IEPA
Iron X106-108, X114 209,000 ppm 5000-8000
pm
IEPA
Lead X106-107 1042 ppm 1000 ppm IDPH[7]
Thallium X109 5560 ppm .02-1.6 ppm IEPA

ppm = parts per million

Table 2.

November 1995, Soil and Sediment Sampling/Old LaSalle Dump
Chemical Name Samples of
Detection
Maximum
Detected
Concentration
Comparison Value Source of Comparison
Value
phenanthrene S5,S7 1.1 ppm n/a n/a
benzo(a)anthracene S5,S7 0.79 ppm n/a n/a
benzo(b)fluoranthene S3,S5,S7 0.91 ppm n/a n/a
benzo(a)pyrene S1,S3,S5,S7,S8 0.7 ppm 0.1 ppm CREG
indeno(123-cd)pyrene S3,S5,S7 0.58 ppm n/a n/a
dibenzo(a,h)anthracene S5 0.17 ppm n/a n/a
cobalt S5,S10 38.9 ppm 2.1-23 ppm IEPA
copper S5-S7,S10 2,090 ppm <2.93-156
ppm
IEPA
iron S5 94,800 ppm 5000-8000
pm
IEPA
lead S5-S7,S11 2,110 ppm 1000 ppm IDPH [7]
delta-BHC S3 0.85 ppm n/a n/a
Arochlor-1248 S1-S3,S5-S9, S11,S13,S15 30,000 ppm 10 ppm EMEG

ppm = parts per million

Table 3.

November 21, 1996 Groundwater Sampling Results
Chemical Samples of
Detection
Maximum
Detected
Concentration
Comparison
Value
Source of
Comparison
Value
LeadGW1-41,500 ppb15 ppbMCL (action level)
Arochlor-1016GW47.4 ppb2 ppbRMEG
Arochlor-1248GW31.7 ppb0.7 ppbEMEG

ppb = parts per billion

Table 4.

Completed Exposure Pathways
Pathway Name: Source Medium Exposure Point Exposure Route Receptor Population Time of Exposure Exposure Activities Estimated Number Exposed Chemicals (reference to table in document)
On-site soil On-site soil Soil Contacting Surface
Soil
Ingestion
Inhalation
Dermal
Trespassers
Fishers
Past
Present
Future
Trespassing or recreating on the site 20 Tables 1 & 2


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