Sample Name: OU4-SS-14-COMP3(0-1)

Sample date: June 14, 2005
Operable Unit: 4
Sample Type: soil
Sample Depth: 0-1
Location Description: Backyard

Contaminants above Illinois EPA soil background level  :

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

Latitude: +41.325332      Longitude: -89.313017

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	36.8 mg/kg
Barium	122 mg/kg	1820 mg/kg
Beryllium	0.56 mg/kg	NT mg/kg
Cadmium	0.5 mg/kg	76.5 mg/kg
Calcium	5525 mg/kg	NT mg/kg
Chromium	13 mg/kg	<136 mg/kg
Cobalt	8.9 mg/kg	<152 mg/kg
Copper	12 mg/kg	54.4 mg/kg
Iron	15000 mg/kg	32800 mg/kg
Lead	20.9 mg/kg	574 mg/kg
Magnesium	2700 mg/kg	NT mg/kg
Manganese	630 mg/kg	570 mg/kg
Mercury	0.5 mg/kg	17 mg/kg
Nickel	13 mg/kg	<29.8 mg/kg
Potassium	1100 mg/kg	NT mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<3.64 mg/kg
Silver	0.5 mg/kg	<29.1 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	4100 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.