Sample Name: SP4-SD1

Sample date: October 9, 2007
Operable Unit: 5
Sample Type: soil
Sample Depth: 0 - 3 in
Location Description: DePue Lake Shoreline Seep Sediment

Contaminants above Illinois EPA soil background level  :

• Barium
• Cadmium
• Copper
• Lead
• Silver
• Thallium
• Zinc

Latitude: +41.3217243      Longitude: -89.306822

Metal Contaminants:

Contaminant	Background Level	Amount Detected
Aluminum	9200 mg/kg	3650 mg/kg
Antimony	3.3 mg/kg	<12 mg/kg
Arsenic	11.3 mg/kg	11 mg/kg
Barium	122 mg/kg	222 mg/kg
Beryllium	0.56 mg/kg	0.45 mg/kg
Cadmium	0.5 mg/kg	1420 mg/kg
Calcium	5525 mg/kg	179000 mg/kg
Chromium	13 mg/kg	8.6 mg/kg
Cobalt	8.9 mg/kg	4.2 mg/kg
Copper	12 mg/kg	38 mg/kg
Iron	15000 mg/kg	9900 mg/kg
Lead	20.9 mg/kg	396 mg/kg
Magnesium	2700 mg/kg	45300 mg/kg
Manganese	630 mg/kg	333 mg/kg
Mercury	0.5 mg/kg	<0.17 mg/kg
Nickel	13 mg/kg	8 mg/kg
Potassium	1100 mg/kg	243 mg/kg
Phosphorus	(No background)	NT mg/kg
Selenium	0.37 mg/kg	<6.8 mg/kg
Silver	0.5 mg/kg	3.8 mg/kg
Sodium	130 mg/kg	8,200 mg/kg
Thallium	0.42 mg/kg	1.7 mg/kg
Vanadium	25 mg/kg	15 mg/kg
Zinc	60.2 mg/kg	95600 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.