Sample Name: OU4-SS-01-COMP3(0-1)

Sample date: May 31, 2005
Operable Unit: 4
Sample Type: soil
Sample Depth: 0-1
Location Description: Backyard/Side Yard

Contaminants above Illinois EPA soil background level  :

• Arsenic
• Barium
• Cadmium
• Copper
• Lead
• Zinc

Latitude: +41.325989      Longitude: -89.316895

Metal Contaminants:

Contaminant	Background Level	Amount Detected
Aluminum	9200 mg/kg	NT mg/kg
Antimony	3.3 mg/kg	NT mg/kg
Arsenic	11.3 mg/kg	12.1 mg/kg
Barium	122 mg/kg	1340 mg/kg
Beryllium	0.56 mg/kg	NT mg/kg
Cadmium	0.5 mg/kg	87.9 mg/kg
Calcium	5525 mg/kg	NT mg/kg
Chromium	13 mg/kg	<115 mg/kg
Cobalt	8.9 mg/kg	121 mg/kg
Copper	12 mg/kg	22.6 mg/kg
Iron	15000 mg/kg	<18700 mg/kg
Lead	20.9 mg/kg	287 mg/kg
Magnesium	2700 mg/kg	NT mg/kg
Manganese	630 mg/kg	<490 mg/kg
Mercury	0.5 mg/kg	<10.2 mg/kg
Nickel	13 mg/kg	<24.3 mg/kg
Potassium	1100 mg/kg	NT mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<3 mg/kg
Silver	0.5 mg/kg	<26.7 mg/kg
Sodium	130 mg/kg	NT mg/kg
Thallium	0.42 mg/kg	NT mg/kg
Vanadium	25 mg/kg	NT mg/kg
Zinc	60.2 mg/kg	2620 mg/kg

Notes: A value of NT indicates that this sample was not tested for a particular contaminant. A value of ND indicates that the contaminant was not detected in the test that was done for it.