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HEALTH CONSULTATION

GIBRALTAR MANUFACTURING COMPANY
EAST ALTON, MADISON COUNTY, ILLINOIS


Table 1.

Gibraltar Manufacturing - Ranking and Central Statistics of Surface Soil Lead Concentrations in parts per million (ppm) from December 1996 Sampling.
Total Lead (ppm) Sample Location
13,600 7-B
6,140 2-B
2,950 3-D

2,190

4-B
2,020 3-B
1,550 12-F
1,450 13-E
1,370 11-F
1,260 10-A
1,160 7-E
976 8-F
829 12-D
782 8-E
777 12-C
711 13-F
650 9-E
573 4-E
550 12-A
546 8-D
518 12-E (PID 2.7 - lab sample at 8-12')
513 13-C
497 6-E
495 4-C
475 7-F
445 6-F
445 11-E
415 13-D
396 7-A
378 9-A
352 10-E
346 2-A
344 6-D
317 3-C
313 10-B
312 7-D
300 6-B
296 4-F
280 5-F
278 5-A
259 11-A
247 5-B
245 9-F
243 4-A
232 3-A
225 5-D
215 5-E
213 5-C
212 3-F
211 9-D
188 6-A
174 2-F
161 4-D
103 10-C
83.2 6-C
69 11-B
62.4 12-B
52.4 2-E (PID 2.3 - 12-15' lab sample)
45.6 11-C (PID 3.1 - 8-12' lab sample)
21.2 3-E
13.8 2-D (PID 4.8 - 8-12' lab sample)
9.2 2-C (PID 3.1 - 8-12' lab sample)
8.35 11-D (PID 3.1 - 8-12' lab sample)

Mean = 821.02
Median = 346

Table 2.

Gibraltar Manufacturing Inorganic Contaminants of Concern which Exceed Health Based Levels for Soil in parts per million (ppm) from December 1996 Sampling.
Sample
Locations
Contaminant Concentration
(ppm)
2-BLead6,140
3-BLead2,020
3-CCopper396
3-DLead2,950
4-BLead2,190
5-BCopper232
7-BLead13,600
7-DCopper705
7-ELead 1,160
10-ALead1,260
10-ECopper222
11-FLead 1,370
12-DArsenic 21.6
12-DCadmium83.3
12-DCopper1,350
12-FLead1,550
13-ELead1,450

Comparison Values used:

Arsenic - 20 ppm for children ATSDR soil chronic EMEG [5]
Cadmium - 40 ppm for children ATSDR soil chronic EMEG [5]
Copper - 150 ppm is Illinois urban background [4]
Lead - 1,000 ppm for children playing in bare contaminated soil [6]

Table 3.

Gibraltar Manufacturing - List of Highest Concentration of Detected Organic On-Site Soil Contaminants from December 1996 Sampling and Available Health Comparison Values in parts per million (ppm).
Contaminant Sample location with
highest detected
concentration
Concentration
(ppm)
Comparison Soil Value
ATSDR
Pica Child
Source
VOLATILES (VOCs)
Acetone12-E (surface)0.170200RMEG
Ethylbenzene12-E (4'-8')0.027200RMEG
Methylene chloride12-E (surface)0.14090CREG
Tetrachloroethene12-E (surface)0.07410CREG
Toluene12-E (4'-8')0.11040IEMEG
Xylenes (total)012-E (4'-8')0.1101,000IEMEG
SEMIVOLATILES (SVOCs)
Naphthalene11-A1.20040IEMEG
2-Methylnapthalene11-A2.000NONENONE
Acenaphthene10-E0.360J100RMEG
Dibenzofuran10-E0.420JNONENONE
Fluorene11-A0.36080RMEG
Pyrene10-E9.20060RMEG
Butyl-benzylphathalate3-C1.900400RMEG
Bis(2-Ethylhexyl)phthalate3-C0.800600CREG
Benzo(a)anthracene10-E4.200NONENONE
Chrysene10-E5.100NONENONE
Benzo(b)fluoranthene10-E3.200NONENONE
Benzo(k) fluoranthene10-E3.000NONENONE
Benzo(a)pyrene10-E3.9000.1 CREG
Dibenzo(a,h)anthracene10-E1.200JNONENONE
Indeno(1,2,3-cd)pyrene10-E2.200NONENONE
Benzo(g,h,i)perylene10-E1.200JNONENONE




Figure 1. Location of the Gibraltar Manufacturing Site in East Alton, Illinois


Figure 2.


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 oneexcess 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.

Maximum Contaminant Levels (MCLs) have been established by USEPA for public watersupplies to reduce the chances of adverse health effects from contaminated drinking water. Thesestandards are well below levels for which health effects have been observed and take into accountthe financial feasibility of achieving specific contaminant levels. These are enforceable limits thatpublic water supplies must meet.

Lifetime Health Advisories for drinking water (LTHAs) have been established by USEPA and arethe concentration of a chemical in drinking water that is not expected to cause any adverse non-carcinogenic effects over a lifetime of exposure. These are conservative values that incorporate amargin of safety.


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