Sample Name: OU4-SS-09-COMP3(6-12)

Sample date: June 8, 2005
Operable Unit: 4
Sample Type: soil
Sample Depth: 12-Jun
Location Description: Backyard

Contaminants above Illinois EPA soil background level  :

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

Latitude: +41.323173      Longitude: -89.306483

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	15.3 mg/kg
Barium	122 mg/kg	669 mg/kg
Beryllium	0.56 mg/kg	NT mg/kg
Cadmium	0.5 mg/kg	<38.3 mg/kg
Calcium	5525 mg/kg	NT mg/kg
Chromium	13 mg/kg	<112 mg/kg
Cobalt	8.9 mg/kg	<116 mg/kg
Copper	12 mg/kg	37.2 mg/kg
Iron	15000 mg/kg	<21600 mg/kg
Lead	20.9 mg/kg	204 mg/kg
Magnesium	2700 mg/kg	NT mg/kg
Manganese	630 mg/kg	<538 mg/kg
Mercury	0.5 mg/kg	10.6 mg/kg
Nickel	13 mg/kg	<24.5 mg/kg
Potassium	1100 mg/kg	NT mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<2.85 mg/kg
Silver	0.5 mg/kg	<26.8 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	1780 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.