Sample Name: OU4-SS-04-COMP3(1-6)

Sample date: June 3, 2005
Operable Unit: 4
Sample Type: soil
Sample Depth: 6-Jan
Location Description: Left-side Backyard

Contaminants above Illinois EPA soil background level  :

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

Latitude: +41.329884      Longitude: -89.295362

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	18 mg/kg
Barium	122 mg/kg	644 mg/kg
Beryllium	0.56 mg/kg	NT mg/kg
Cadmium	0.5 mg/kg	50.7 mg/kg
Calcium	5525 mg/kg	NT mg/kg
Chromium	13 mg/kg	<117 mg/kg
Cobalt	8.9 mg/kg	<125 mg/kg
Copper	12 mg/kg	54.8 mg/kg
Iron	15000 mg/kg	<23200 mg/kg
Lead	20.9 mg/kg	218 mg/kg
Magnesium	2700 mg/kg	NT mg/kg
Manganese	630 mg/kg	<772 mg/kg
Mercury	0.5 mg/kg	<10.9 mg/kg
Nickel	13 mg/kg	<26.4 mg/kg
Potassium	1100 mg/kg	NT mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<3.05 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	3290 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.