Sample Name: OU4-SS-02-COMP3(6-12)

Sample date: June 1, 2005
Operable Unit: 4
Sample Type: soil
Sample Depth: 12-Jun
Location Description: Backyard

Contaminants above Illinois EPA soil background level  :

• Arsenic
• Barium
• Copper
• Iron
• Lead
• Mercury
• Zinc

Latitude: +41.323636      Longitude: -89.310957

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	11.9 mg/kg
Barium	122 mg/kg	587 mg/kg
Beryllium	0.56 mg/kg	NT mg/kg
Cadmium	0.5 mg/kg	<39.1 mg/kg
Calcium	5525 mg/kg	NT mg/kg
Chromium	13 mg/kg	<114 mg/kg
Cobalt	8.9 mg/kg	NT mg/kg
Copper	12 mg/kg	17.4 mg/kg
Iron	15000 mg/kg	21000 mg/kg
Lead	20.9 mg/kg	87.2 mg/kg
Magnesium	2700 mg/kg	NT mg/kg
Manganese	630 mg/kg	554 mg/kg
Mercury	0.5 mg/kg	9.42 mg/kg
Nickel	13 mg/kg	<25.2 mg/kg
Potassium	1100 mg/kg	NT mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<2.66 mg/kg
Silver	0.5 mg/kg	<27.2 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	1140 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.