FINAL REMEDIAL INVESTIGATION REPORT1500 Eighth Street P.O. Box 1500 LaSalle, Illinois 61301-3500...

Prepared for

Carus Corporation and

Carus Chemical Company

1500 Eighth Street

P.O. Box 1500

LaSalle, Illinois 61301-3500

U.S. Environmental Protection

Agency Region 5

77 West Jackson Boulevard

Chicago, Illinois 60604

FINAL

REMEDIAL INVESTIGATION REPORT

MATTHIESSEN AND HEGELER ZINC COMPANY SITE

LASALLE, ILLINOIS

Volume 1 of 6

Prepared by

Geosyntec Consultants

134 North LaSalle Street

Suite 300


SulTRAC

1 South Wacker Drive

37th Floor


Geosyntec Project Number CWR1710

JUNE 2012

FINAL

REMEDIAL INVESTIGATION REPORT

REVISION 0

FOR

MATTHIESSEN AND HEGELER ZINC COMPANY SITE

LA SALLE COUNTY, ILLINOIS

Prepared for

United States Environmental Protection Agency

Region 5

77 West Jackson Boulevard


Work Assignment No. : 132-RICO-B568

EPA Region : 5

Date Prepared : June 1, 2012

, Contract No. : EP-S5-06-02

Prepared by : SulTRAC

SulTRAC Project Manager : Jennifer Knoepfle

Telephone No. : (312) 443-0550 ext. 21

EPA Work Assignment Manager : Demaree Collier

Telephone No. (312) 886-0214

Matthiessen and Hegeler Zinc Company Site June 1, 2012

Final Remedial Investigation Report Revision 0

12-CWR1710-Remedial Investigation Report i

TABLE OF CONTENTS

VOLUME 1 Report Text

SULTRAC DISC 1 OF 2 Appendices S-1 through S-9

SULTRAC DISC 2 OF 2 Appendices S-10 through S-46

GEOSYNTEC DISC 1 OF 2 Appendices G-2-1 through G-5-2

GEOSYNTEC DISC 2 OF 2 Appendix RA – Final Risk Assessment

VOLUME 2 Sections 1, 2, 3, 5, and 6 Figures

VOLUME 3 Section 4 Figures

VOLUME 4 Sections 2, 3, 5, 6, and 9 Tables

VOLUME 5 Section 4 Tables (Tables 4.0-1 through 4.2.2-2)

VOLUME 6 Section 4 Tables (Tables 4.2.2-3 through 4.3.3-4)



12-CWR1710-Remedial Investigation Report ii

VOLUME 1

EXECUTIVE SUMMARY .................................................................................................................. ES-1

1.0 INTRODUCTION....................................................................................................................... 1-1

1.1 PURPOSE OF REPORT ..................................................................................................... 1-2

1.1.1 Roles of Parties Involved ....................................................................................... 1-2

1.1.2 Integration of OU1 and OU2 Investigations .......................................................... 1-3

1.2 SITE BACKGROUND ....................................................................................................... 1-3

1.2.1 Site Description ...................................................................................................... 1-3

1.2.1.1 OU1 Description .................................................................................... 1-4

1.2.1.2 OU2 Description .................................................................................... 1-5

1.2.2 Site History ............................................................................................................ 1-5

1.2.2.1 OU1 History ........................................................................................... 1-6

1.2.2.2 OU2 History ........................................................................................... 1-7

1.2.3 Previous Investigations .......................................................................................... 1-8

1.2.3.1 OU1 Investigations ................................................................................ 1-9

1.2.3.2 OU2 Investigations .............................................................................. 1-12

1.3 REPORT ORGANIZATION ............................................................................................ 1-15

2.0 RI ACTIVITIES ......................................................................................................................... 2-1

2.1 OU1 INVESTIGATION ACTIVITIES .............................................................................. 2-1

2.1.1 Soil Investigation ................................................................................................... 2-2

2.1.1.1 Phase I Soil Investigation ...................................................................... 2-3

2.1.1.2 Phase II Soil Investigation ..................................................................... 2-5

2.1.2 Groundwater Investigation ..................................................................................... 2-5

2.1.2.1 Phase I Groundwater Investigation ........................................................ 2-6

2.1.2.2 Phase II Groundwater Investigation ...................................................... 2-8

2.1.3 Surface Water and Sediment Investigation ............................................................ 2-9



12-CWR1710-Remedial Investigation Report iii

2.1.3.1 Phase I Surface Water and Sediment Investigation ............................... 2-9

2.1.3.2 Phase II Surface Water and Sediment Investigation ............................ 2-11

2.1.4 Ecological Receptor Investigation ....................................................................... 2-13

2.1.4.1 Phase I Ecological Characterization .................................................... 2-14

2.1.4.2 Phase II Ecological Characterization ................................................... 2-19

2.1.4.3 Additional Ecological Characterization ............................................... 2-21

2.1.5 Air Sampling Investigation .................................................................................. 2-22

2.2 OU2 INVESTIGATION ACTIVITIES ............................................................................ 2-22

2.2.1 Soil Investigation ................................................................................................. 2-23

2.2.1.1 Phase I Soil Investigation .................................................................... 2-23

2.2.1.2 Phase II Soil Investigation ................................................................... 2-26

2.2.2 Groundwater Investigation ................................................................................... 2-28

2.2.2.1 Phase I Groundwater Investigation ...................................................... 2-29

2.2.2.2 Phase II Groundwater Investigation .................................................... 2-32

2.2.3 Building Material Investigation ........................................................................... 2-35

2.2.3.1 Phase I Building Material Investigation .............................................. 2-35

2.2.3.2 Phase II Building Material Investigation ............................................. 2-36

2.2.4 Pile Investigation .................................................................................................. 2-37

2.2.5 Surface Water Investigation ................................................................................. 2-37

2.2.5.1 Phase I Surface Water Investigation .................................................... 2-37

2.2.5.2 Phase II Surface Water Investigation ................................................... 2-38

2.2.6 Residential Area/Off-Site Area Investigation ...................................................... 2-41

2.2.6.1 Phase I Residential Area/Off-Site Area Investigation ......................... 2-41

2.2.6.2 Phase II Residential Area/Off-Site Area Investigation ........................ 2-42

2.2.7 Ecological Receptor Investigation ....................................................................... 2-45

2.2.7.1 Phase I Ecological Receptor Investigation .......................................... 2-45



12-CWR1710-Remedial Investigation Report iv

2.2.7.2 Phase II Ecological Receptor Investigation ......................................... 2-49

2.2.8 Air Sampling Investigation .................................................................................. 2-50

2.3 SITE-WIDE BACKGROUND SOIL INVESTIGATIONS.............................................. 2-54

3.0 PHYSICAL CHARACTERISTICS OF THE SITE ................................................................ 3-1

3.1 GENERAL SETTING ........................................................................................................ 3-1

3.1.1 Surface Features ..................................................................................................... 3-1

3.1.2 Subsurface Manmade Features .............................................................................. 3-3

3.1.3 Surface Water Hydrology ...................................................................................... 3-5

3.1.4 Weather Conditions ................................................................................................ 3-5

3.1.5 Demography and Land Use .................................................................................... 3-7

3.1.6 Regional Geology .................................................................................................. 3-7

3.1.7 Regional Hydrogeology ......................................................................................... 3-8

3.1.8 Ecology .................................................................................................................. 3-9

3.2 OU1 FEATURES .............................................................................................................. 3-10

3.2.1 Soils ...................................................................................................................... 3-10

3.2.2 Geology ................................................................................................................ 3-11

3.2.3 Hydrogeology....................................................................................................... 3-14

3.2.3.1 Hydrogeologic Characteristics ............................................................. 3-15

3.2.3.2 Variations in Water Levels .................................................................. 3-16

3.2.3.3 Groundwater Gradients, Recharge and Discharge ............................... 3-17

3.2.3.4 Summary of Hydrogeologic Conditions .............................................. 3-19

3.3 OU2 FEATURES .............................................................................................................. 3-20

3.3.1 Soils ...................................................................................................................... 3-20

3.3.2 Geology ................................................................................................................ 3-21

3.3.2.1 Bond Formation of the McLeansboro Group of the Pennsylvanian System.................................................................................................. 3-22



12-CWR1710-Remedial Investigation Report v

3.3.2.2 Lemont Formation ............................................................................... 3-24

3.3.2.3 Equality Formation .............................................................................. 3-24

3.3.2.4 Artificial Fill ........................................................................................ 3-24

3.3.3 Hydrogeology....................................................................................................... 3-25

3.3.3.1 Hydraulic Conductivity........................................................................ 3-26

3.3.3.2 Groundwater Flow ............................................................................... 3-27

3.4 SITE-WIDE INTERPRETATION .................................................................................... 3-29

3.4.1 Soils ...................................................................................................................... 3-29

3.4.2 Geology ................................................................................................................ 3-29

3.4.2.1 Artificial Fill ........................................................................................ 3-30

3.4.2.2 Cahokia Formation and Holocene Alluvium ....................................... 3-32

3.4.2.3 Equality Formation .............................................................................. 3-32

3.4.2.4 Lemont Formation ............................................................................... 3-32

3.4.2.5 McLeansboro Group ............................................................................ 3-33

3.4.3 Site-Wide Hydrogeology ..................................................................................... 3-35

3.4.3.1 Hydraulic Conductivity........................................................................ 3-35

3.4.3.2 Groundwater Gradients ........................................................................ 3-36

3.4.3.3 Recharge and Discharge ...................................................................... 3-37

3.4.3.4 Water Level Variation ......................................................................... 3-37

3.4.3.5 Summary .............................................................................................. 3-38

4.0 NATURE AND EXTENT OF CONTAMINATION ............................................................... 4-1

4.1 OU1 INVESTIGATION AREAS AND ANALYTICAL RESULTS ................................ 4-3

4.1.1 OU1 Investigation Areas ........................................................................................ 4-4

4.1.1.1 Plant Area .............................................................................................. 4-4

4.1.1.2 Slag Pile ................................................................................................. 4-5

4.1.1.3 Little Vermilion River ........................................................................... 4-5



12-CWR1710-Remedial Investigation Report vi

4.1.2 OU1 Soil Results .................................................................................................... 4-6

4.1.2.1 Plant Area Soil Results .......................................................................... 4-6

4.1.2.2 Slag Pile Area Soil Results .................................................................. 4-12

4.1.3 OU1 Groundwater Results ................................................................................... 4-19

4.1.3.1 Plant Area Groundwater Results .......................................................... 4-21

4.1.3.2 Slag Pile Groundwater Results ............................................................ 4-25

4.1.4 OU1 Sediment and Surface Water Results .......................................................... 4-29

4.1.4.1 Slag Pile Sediment Results .................................................................. 4-29

4.1.4.2 LVR Sediment and Surface Water Results .......................................... 4-35

4.1.5 Vertical Extent of Contamination in Soil and Groundwater at OU1 ................... 4-44

4.1.5.1 Vertical Extent of Metal Contamination in Soil and Groundwater ..... 4-45

4.1.5.2 Vertical Extent of VOC Contamination in Soil and Groundwater ...... 4-49

4.1.5.3 Vertical Extent of SVOC Contamination in Soil and Groundwater .... 4-50

4.1.5.4 Vertical Extent of PCB Contamination in Soil and Groundwater ....... 4-51

4.1.5.5 Vertical Extent of Pesticides Contamination in Soil and Groundwater ........................................................................................ 4-51

4.1.6 Horizontal Extent of Contamination in OU1 ....................................................... 4-51

4.1.6.1 Horizontal Extent of Contamination in Soils ....................................... 4-51

4.1.6.2 Horizontal Extent of Contamination in Groundwater .......................... 4-56

4.1.6.3 Horizontal Extent of Contamination in Sediment and Surface Water.................................................................................................... 4-62

4.1.7 OU1 Air Results ................................................................................................... 4-72

4.2 OU2 RESULTS ................................................................................................................. 4-73

4.2.1 OU2 Investigation Areas ...................................................................................... 4-74

4.2.1.1 Investigation Area 1: Building 100 ...................................................... 4-75

4.2.1.2 Investigation Area 2: Rolling Mill ....................................................... 4-75

4.2.1.3 Investigation Area 3: Former Main Industrial Area ............................ 4-76



12-CWR1710-Remedial Investigation Report vii

4.2.1.4 Investigation Area 4: North Area/Northeast Periphery Area ............... 4-76

4.2.1.5 Investigation Area 5: Residential Area/Off-site Area .......................... 4-76

4.2.1.6 Groundwater Investigation Areas: WBZ1 and WBZ2 ......................... 4-77

4.2.2 OU2 Soil Results .................................................................................................. 4-77

4.2.2.1 Investigation Area 1: Building 100 ...................................................... 4-82

4.2.2.2 Investigation Area 2: Rolling Mill ....................................................... 4-97

4.2.2.3 Investigation Area 3: Former Main Industrial Area .......................... 4-113

4.2.2.4 Investigation Area 4: North Area/Northeast Periphery Area ............. 4-134

4.2.2.5 Investigation Area 5: Residential Area/Off-site Area ........................ 4-145

4.2.3 OU2 Building Material Results .......................................................................... 4-150

4.2.3.1 Investigation Area 1: Building 100 .................................................... 4-151

4.2.3.2 Investigation Area 2: Rolling Mill ..................................................... 4-154


4.2.4 OU2 Pile Results ................................................................................................ 4-167




4.2.5 OU2 Groundwater Results ................................................................................. 4-188

4.2.5.1 OU2 WBZ1 Monitoring Well Results ............................................... 4-190

4.2.5.2 OU2 WBZ2 Monitoring Well Results ............................................... 4-217

4.2.6 OU2 Surface Water Results ............................................................................... 4-236

4.2.6.1 Metals and Cyanide ........................................................................... 4-238

4.2.6.2 VOCs ................................................................................................. 4-248

4.2.6.3 SVOCs ............................................................................................... 4-248

4.2.6.4 PCBs .................................................................................................. 4-248

4.2.6.5 Pesticides ........................................................................................... 4-249



12-CWR1710-Remedial Investigation Report viii

4.2.6.6 OU2 Surface Water Summary ........................................................... 4-251

4.2.7 OU2 Air Results ................................................................................................. 4-251




4.3 SITE-WIDE INTERPRETATION OF RI RESULTS .................................................... 4-255

4.3.1 OU1 .................................................................................................................... 4-255

4.3.1.1 OU1 Soil Results ............................................................................... 4-256

4.3.1.2 OU1 Groundwater Results ................................................................. 4-256

4.3.1.3 OU1 Surface Water and Sediment Results ........................................ 4-257

4.3.2 OU2 .................................................................................................................... 4-258

4.3.2.1 OU2 Soil/Solid Results ...................................................................... 4-258

4.3.2.2 OU2 Groundwater Results ................................................................. 4-259

4.3.2.3 OU2 Surface Water Results ............................................................... 4-260

4.3.2.4 OU2 Air Results ................................................................................ 4-260

4.3.3 Border Areas ...................................................................................................... 4-261

4.3.3.1 Border Areas Soil Summary .............................................................. 4-261

4.3.3.2 Border Areas Groundwater Summary ............................................... 4-264

5.0 CONTAMINANT FATE AND TRANSPORT ......................................................................... 5-1

5.1 PHYSIOCHEMICAL FACTORS AFFECTING CHEMICAL FATE AND TRANSPORT ..................................................................................................................... 5-1

5.1.1 Water Solubility ..................................................................................................... 5-2

5.1.2 Adsorption/Partitioning .......................................................................................... 5-2

5.1.2.1 Inorganic Partitioning ............................................................................ 5-3

5.1.2.2 Organic Partitioning ............................................................................... 5-3

5.1.3 Vapor Pressure and Henry’s Law Constant ........................................................... 5-4



12-CWR1710-Remedial Investigation Report ix

5.1.4 Soil Chemistry........................................................................................................ 5-4

5.1.5 Physical Transport Factors ..................................................................................... 5-5

5.2 CHEMICAL PERSISTENCE ............................................................................................. 5-6

5.2.1 Volatilization .......................................................................................................... 5-6

5.2.2 Degradation ............................................................................................................ 5-6

5.3 EXPECTED CHEMICAL FATE AND TRANSPORT ...................................................... 5-7

5.3.1 Inorganic Constituents ........................................................................................... 5-7

5.3.1.1 Aluminum .............................................................................................. 5-8

5.3.1.2 Antimony ............................................................................................... 5-9

5.3.1.3 Arsenic ................................................................................................... 5-9

5.3.1.4 Barium ................................................................................................. 5-10

5.3.1.5 Beryllium ............................................................................................. 5-11

5.3.1.6 Cadmium.............................................................................................. 5-12

5.3.1.7 Chromium ............................................................................................ 5-12

5.3.1.8 Cobalt ................................................................................................... 5-13

5.3.1.9 Copper.................................................................................................. 5-13

5.3.1.10 Cyanide ................................................................................................ 5-14

5.3.1.11 Iron ....................................................................................................... 5-15

5.3.1.12 Lead ..................................................................................................... 5-16

5.3.1.13 Manganese ........................................................................................... 5-17

5.3.1.14 Mercury................................................................................................ 5-17

5.3.1.15 Nickel ................................................................................................... 5-18

5.3.1.16 Selenium .............................................................................................. 5-18

5.3.1.17 Silver .................................................................................................... 5-20

5.3.1.18 Thallium ............................................................................................... 5-20

5.3.1.19 Vanadium ............................................................................................. 5-21



12-CWR1710-Remedial Investigation Report x

5.3.1.20 Zinc ...................................................................................................... 5-22

5.3.2 VOCs .................................................................................................................... 5-22

5.3.3 SVOCs ................................................................................................................. 5-27

5.3.4 PCBs .................................................................................................................... 5-31

5.3.5 Pesticides .............................................................................................................. 5-32

5.3.6 Asbestos ............................................................................................................... 5-35

5.4 POTENTIAL CONTAMINANT MIGRATION ROUTES FOR OU1 ............................ 5-36

5.4.1 Potential Migration of Inorganic Contaminants in Soil ....................................... 5-36

5.4.1.1 SEP Results .......................................................................................... 5-37

5.4.1.2 SPLP Results ....................................................................................... 5-45

5.4.1.3 Specialized Leachability Testing – Terrestrial and Submerged Slag Materials .............................................................................................. 5-48

5.4.1.4 TCLP Results ....................................................................................... 5-49

5.4.2 Potential Migration of Contaminants in Groundwater ......................................... 5-49

5.4.3 Potential Migration of Contaminants in Air ......................................................... 5-50

5.4.4 Potential Migration of Contaminants in Surface Water and Surface Water Runoff .................................................................................................................. 5-51

5.4.5 Potential Migration of Contaminants in Sediments ............................................. 5-52

5.5 POTENTIAL CONTAMINANT MIGRATION ROUTES FOR OU2 ............................ 5-53

5.5.1 Potential Migration of Contaminants in Soils/Solids ........................................... 5-53

5.5.1.1 Metals .................................................................................................. 5-54

5.5.1.2 VOCs ................................................................................................... 5-59

5.5.1.3 SVOCs, PCBs, and Pesticides ............................................................. 5-60

5.5.2 Potential Migration of Contaminants in Groundwater ......................................... 5-61

5.5.2.1 Metals .................................................................................................. 5-62

5.5.2.2 VOCs ................................................................................................... 5-63

5.5.2.3 SVOCs, Pesticides, and PCBs ............................................................. 5-64



12-CWR1710-Remedial Investigation Report xi

5.5.3 Potential Migration of Contaminants in Air ......................................................... 5-66

5.5.4 Potential Migration of Contaminants in Surface Water and Surface Water Runoff .................................................................................................................. 5-67

6.0 CONCEPTUAL SITE MODEL ................................................................................................ 6-1

6.1 OU1 CONCEPTUAL SITE MODEL ................................................................................. 6-1

6.1.1 Physical Characteristics ......................................................................................... 6-1

6.1.1.1 Surface Features ..................................................................................... 6-1

6.1.1.2 Geology.................................................................................................. 6-2

6.1.1.3 Hydrogeology ........................................................................................ 6-3

6.1.2 Nature and Extent of Contamination ...................................................................... 6-6

6.1.2.1 Soil Results ............................................................................................ 6-7

6.1.2.2 Groundwater Results ............................................................................. 6-8

6.1.2.3 Surface Water and Sediment Results ..................................................... 6-9

6.1.3 Contaminant Fate and Transport .......................................................................... 6-10

6.1.3.1 Potential Migration of Contaminants in Soil ....................................... 6-11

6.1.3.2 Potential Migration of Contaminants in Groundwater ......................... 6-11

6.1.3.3 Potential Migration of Contaminants in Air ........................................ 6-11

6.1.3.4 Potential Migration of Contaminants in Surface Water and Surface Water Runoff .................................................................................................. 6-12

6.1.3.5 Potential Migration of Contaminants in Sediments ............................. 6-12

6.2 OU2 CONCEPTUAL SITE MODEL ............................................................................... 6-13

6.2.1 Physical Characteristics of OU2 .......................................................................... 6-13

6.2.1.1 Surface Features ................................................................................... 6-13

6.2.1.2 Geology................................................................................................ 6-15

6.2.1.3 Hydrogeology ...................................................................................... 6-17

6.2.2 Nature and Extent of Contamination at OU2 ....................................................... 6-18

6.2.2.1 OU2 Soil/Solid Results ........................................................................ 6-19



12-CWR1710-Remedial Investigation Report xii

6.2.2.2 OU2 Groundwater Results ................................................................... 6-21

6.2.2.3 OU2 Surface Water Results ................................................................. 6-22

6.2.2.4 OU2 Air Results .................................................................................. 6-22

6.2.3 Contaminant Fate and Transport at OU2 ............................................................. 6-23

6.2.3.1 Potential Migration of Contaminants in Soils/Solids ........................... 6-23

6.2.3.2 Potential Migration of Contaminants in Groundwater ......................... 6-23

6.2.3.3 Potential Migration of Contaminants in Air ........................................ 6-24

6.2.3.4 Potential Migration of Contaminants in Surface Water and Surface Water Runoff .................................................................................................. 6-24

6.3 SITE-WIDE CONCEPTUAL SITE MODEL ................................................................... 6-25

6.3.1 Physical Characteristics ....................................................................................... 6-25

6.3.2 Geology ................................................................................................................ 6-27

6.3.3 Hydrogeology....................................................................................................... 6-28

6.3.4 Surface Water ....................................................................................................... 6-29

6.3.5 Nature and Extent of Contamination .................................................................... 6-29

6.3.5.1 Soil/Solid Matrix ................................................................................. 6-29

6.3.5.2 Groundwater ........................................................................................ 6-30

6.3.5.3 Surface Water and Sediments .............................................................. 6-30

6.3.5.4 Building Materials and Debris ............................................................. 6-31

6.3.6 Contaminant Fate and Transport .......................................................................... 6-31

6.3.6.1 Potential Migration of COIs in Soil ..................................................... 6-31

6.3.6.2 Potential Migration in Groundwater .................................................... 6-31

6.3.6.3 Potential Migration in Air .................................................................... 6-32

6.3.6.4 Potential Migration in Surface Water and Runoff ............................... 6-32

6.3.6.5 Potential Migration in Sediments ........................................................ 6-33

7.0 HUMAN HEALTH RISK ASSESSMENT ............................................................................... 7-1



12-CWR1710-Remedial Investigation Report xiii

7.1 OU1 HUMAN HEALTH RISK ASSESSMENT ............................................................... 7-1

7.1.1 Data Evaluation and Selection of COPCs .............................................................. 7-3

7.1.2 Exposure Assessment ............................................................................................. 7-3

7.1.3 Toxicity Assessment .............................................................................................. 7-6

7.1.4 Risk Characterization ............................................................................................. 7-8

7.1.4.1 Summary of Risks and Hazards at the Carus Plant Area ....................... 7-9

7.1.4.2 Summary of Risks and Hazards at the Slag Pile Area ......................... 7-11

7.1.4.3 Summary of Risks and Hazards at the LVR ........................................ 7-12

7.1.4.4 Localized Impact Evaluation ............................................................... 7-13

7.1.5 Uncertainties ........................................................................................................ 7-13

7.1.6 OU1 HHRA Summary and Conclusions .............................................................. 7-14

7.1.6.1 Groundwater ........................................................................................ 7-14

7.1.6.2 Carus Plant Area .................................................................................. 7-15

7.1.6.3 Slag Pile Area ...................................................................................... 7-16

7.1.6.4 LVR ..................................................................................................... 7-17

7.1.7 Overall OU1 HHRA Conclusions ........................................................................ 7-17

7.2 OU2 HUMAN HEALTH RISK ASSESSMENT ............................................................. 7-18

7.2.1 Objectives............................................................................................................. 7-18

7.2.2 OU2 Exposure Areas ........................................................................................... 7-18

7.2.3 HHRA Approach .................................................................................................. 7-20

7.2.4 HHRA Results...................................................................................................... 7-26

7.2.4.1 Summary of Risks and Hazards at the Main Plant Area (EA1) ........... 7-26



7.2.4.4 Summary of Risks and Hazards at the Building 100 Hotspot (EA4) ... 7-27

7.2.4.5 Summary of Risks and Hazards at the Rolling Mill Area (EA5)......... 7-28



12-CWR1710-Remedial Investigation Report xiv

7.2.4.6 Summary of Risks and Hazards at the Off-Site Residential Area (EA6) ................................................................................................... 7-29

7.2.4.7 Summary of Risks and Hazards at the Off-Site Mixed-Use Area (EA7) ................................................................................................... 7-30

7.2.4.8 Hot-Spot Analysis ................................................................................ 7-30

7.2.5 Uncertainties ........................................................................................................ 7-32

7.2.6 Overall HHRA Conclusions for OU2 .................................................................. 7-33

7.3 SITE-WIDE HUMAN HEALTH RISK ASSESSMENT ................................................. 7-33

8.0 ECOLOGICAL RISK ASSESSMENT ..................................................................................... 8-1

8.1 OU1 ECOLOGICAL RISK ASSESSMENT ...................................................................... 8-1

8.1.1 OU1 Screening Level Ecological Risk Assessment (Steps 1 and 2) ...................... 8-2

8.1.2 OU1 LVR Baseline Ecological Risk Assessment (Steps 3 through 7) .................. 8-4

8.1.2.1 Baseline Problem Formulation (Step 3) ................................................. 8-5

8.1.2.2 Measurement Endpoints and Study Design (Step 4) ............................. 8-8

8.1.2.3 Verification of Field Sampling Design (Step 5) .................................. 8-11

8.1.2.4 Site Investigation and Data Analysis (Step 6) ..................................... 8-11

8.1.2.5 Risk Characterization (Step 7) and Weight-of Evidence ..................... 8-13

8.1.2.6 BERA Summary and Conclusions ....................................................... 8-21

8.2 OU2 ECOLOGICAL RISK ASSESSMENT .................................................................... 8-24

8.2.1 OU2 Screening Level Risk Assessment ............................................................... 8-24

8.2.1.1 Main Plant Area – Highly Disturbed Habitat ...................................... 8-25

8.2.1.2 Next to the Main Plant Area – Disturbed with Vegetation Habitat ..... 8-26

8.2.1.3 Savannah Habitat ................................................................................. 8-26

8.2.1.4 Oak-Hickory Woodland Habitat .......................................................... 8-27

8.2.1.5 Area East of the Little Vermilion River ............................................... 8-27

8.2.1.6 Conclusions and Recommendations .................................................... 8-28

8.2.2 OU2 Baseline Risk Assessment ........................................................................... 8-28



12-CWR1710-Remedial Investigation Report xv

8.2.2.1 Next to the Main Plant Area – Disturbed with Vegetation .................. 8-32

8.2.2.2 Savannah .............................................................................................. 8-32

8.2.2.3 Oak-Hickory Woodland ....................................................................... 8-33

9.0 SUMMARY AND CONCLUSIONS ......................................................................................... 9-1

9.1 OU1 SUMMARY ............................................................................................................... 9-1


9.1.2 Contaminant Fate and Transport ............................................................................ 9-2

9.2 OU2 SUMMARY ............................................................................................................... 9-4


9.2.2 Contaminant Fate and Transport ............................................................................ 9-5

9.3 HUMAN HEALTH RISK ASSESSMENT SUMMARY .................................................. 9-6

9.3.1 OU1 Summary ....................................................................................................... 9-6

9.3.1.1 Groundwater .......................................................................................... 9-7

9.3.1.2 Plant Area .............................................................................................. 9-7

9.3.1.3 Slag Pile Area ........................................................................................ 9-9

9.3.1.4 Little Vermilion River ......................................................................... 9-10

9.3.1.5 Overall OU1 HHRA Conclusions ........................................................ 9-10

9.3.2 OU2 Summary ..................................................................................................... 9-10

9.3.3 Site Summary ....................................................................................................... 9-11

9.4 ECOLOGICAL RISK ASSESSMENT SUMMARY ....................................................... 9-12

9.4.1 OU1 Summary ..................................................................................................... 9-13

9.4.2 OU2 Summary ..................................................................................................... 9-16

9.5 CONCLUSIONS ............................................................................................................... 9-18

9.5.1 Adequacy of the RI .............................................................................................. 9-18

9.5.2 Data Limitations and Uncertainties ...................................................................... 9-18

10.0 REFERENCES .......................................................................................................................... 10-1



12-CWR1710-Remedial Investigation Report xvi

LIST OF FIGURES

VOLUME 2

1.2.1-1 Site Location Map

2.1.1-1 Plant Area Sampling Locations

2.1.1-2 Slag Pile Sampling Locations

2.1.1-3 LVR Slag Sampling Locations

2.1.2-1 OU1 Monitoring Well Network

2.1.3-1 LVR Sediment Sampling Locations

2.1.3-2 LVR Surface Water Sampling Locations

2.2.1-1 Phase I Soil Boring, Pile, and Building Material Sampling Locations

2.2.1-2 Phase II Soil Boring and Building Material Sampling Locations

2.2.1-3 Phase II XRF Screening and Surface Soil Sampling Locations

2.2.2-1 Phase I and Phase II Groundwater Monitoring Well and Piezometer Locations

2.2.5-1 Phase I and Phase II Surface Water Sampling Locations

2.2.6-1 Phase I and Phase II Residential Area/Off-Site Area Sampling Locations

2.2.7-1 Ecological Sampling Locations

2.2.8-1 Asbestos Air Sampling Locations

2.3-1 Site-Wide Background Soil Sampling Locations

3.1.3-1 Site and Vicinity Map

3.1.6-1 Surface Geology of the Matthiessen and Hegeler Zinc Company Site Vicinity

3.1.7-1 Public Water Well Locations

3.2.1-1 OU1 Soils as Identified by USDA NRCS

3.2.2-1 Geologic Cross-Section A'-A"

3.2.2-2 Geologic Cross-Section B'-B" & C-C'

3.2.2-3 Geologic Cross-Section D-D'

3.2.3-1 Erosional Gully (Figure 13 from the 1994 Tech Letter Report)

3.2.3-2 September 2008 Potentiometric Surface Map Water Bearing Zone 1 (WBZ-1)

3.2.3-3 September 2008 Potentiometric Surface Map Water Bearing Zone 2 (WBZ-2)

3.2.3-4 March 2009 Potentiometric Surface Map Water Bearing Zone 1 (WBZ-1)

3.2.3-5 March 2009 Potentiometric Surface Map Water Bearing Zone 2 (WBZ-2)

3.2.3-6 Groundwater Mound, Plant Area (Figure 14 from Tech Letter Report)



12-CWR1710-Remedial Investigation Report xvii

LIST OF FIGURES

3.3.1-1 OU2 Soils

3.3.2-1 Geologic Cross-Section A-A'-A"

3.3.2-2 Geologic Cross-Section B-B'-B"

3.3.2-3 MW35 Natural Gamma Log vs. Soil Boring Log

3.3.3-1 Potentiometric Surface Map for WBZ1, September 2008

3.3.3-2 Potentiometric Surface Map for WBZ2, September 2008

3.3.3-3 Potentiometric Surface Map for WBZ1, December 2008

3.3.3-4 Potentiometric Surface Map for WBZ2, December 2008

3.4.1-1 Site wide soils as identified by USDA NRCS

5.4.1-1 Sequential Extraction Procedure Data for Arsenic

5.4.1-2 Sequential Extraction Procedure Data for Cadmium

5.4.1-3 Sequential Extraction Procedure Data for Chromium

5.4.1-4 Sequential Extraction Procedure Data for Copper

5.4.1-5 Sequential Extraction Procedure Data for Lead

5.4.1-6 Sequential Extraction Procedure Data for Mercury

5.4.1-7 Sequential Extraction Procedure Data for Zinc

5.5.1-1 Surface Soil SPLP and Select Total Metals Groundwater Results

5.5.1-2 Subsurface Soil SPLP and Select Total Metals Groundwater Results

5.5.4-1 Surface Water Features and Sampling Locations

6.1.1-1 OU1 Conceptual Site Model

6.2.1-1 OU2 Conceptual Site Model

VOLUME 3

4.1.1-1 OU1 Sampling Location Map

4.1.1-2 OU1 Sampling Location Map (Detail)

4.1.2-1 Metals in Shallow Plant Area Soil

4.1.2-2 Metals in Deep Plant Area Soil

4.1.2-3 SVOCs in Shallow Plant Area Soil

4.1.2-4 PCBs in Shallow Plant Area Soil

4.1.2-5 Metals in Shallow Slag Pile Soil

4.1.2-6 Metals in Deep Slag Pile Soil



12-CWR1710-Remedial Investigation Report xviii

LIST OF FIGURES

4.1.2-7 SVOCs in Shallow Slag Pile Soil

4.1.2-8 SVOCs in Deep Slag Pile Soil

4.1.3-1a Dissolved Metals in Plant Area Groundwater Historical Data: 1991-1994

4.1.3-1b Dissolved Metals in Plant Area Groundwater

4.1.3-2a Total Metals in Plant Area Groundwater Historical Data: 1991-1994

4.1.3-2b Total Metals in Plant Area Groundwater

4.1.3-3a VOCs in Plant Area Groundwater Historical Data: 1991-1994

4.1.3-3b VOCs in Plant Area Groundwater

4.1.3-4a SVOCs in Plant Area Groundwater Historical Data: 1991-1994

4.1.3-4b SVOCs in Plant Area Groundwater

4.1.3-5a Dissolved Metals in Slag Pile Groundwater Historical Data: 1991-1994

4.1.3-5b Dissolved Metals in Slag Pile Groundwater

4.1.3-6a Total Metals in Slag Pile Groundwater Historical Data: 1991-1994

4.1.3-6b Total Metals in Slag Pile Groundwater

4.1.4-1 Metals in Slag Pile Sediment

4.1.4-2 VOCs in Slag Pile Sediment

4.1.4-3 SVOCs in Slag Pile Sediment

4.1.4-4 PCBs in Slag Pile Sediment

4.1.4-5 Metals in Little Vermilion River Sediment

4.1.4-6 Dissolved Metals in Little Vermilion River Surface Water

4.1.4-7 Total Metals in Little Vermilion River Surface Water

4.1.4-8 VOCs in Little Vermilion River Sediment

4.1.4-9 SVOCs in Little Vermilion River Sediment

4.1.4-10 PCBs in Little Vermilion River Sediment

4.1.4-11 Pesticides in Little Vermilion River Sediment

4.1.5-1 Overview of Geologic Cross Sections for OU1

4.1.5-2 Total Metals in Soil - Cross Section A to A'

4.1.5-3 Total Metals in Soil - Cross Section B to B'

4.1.5-4 Total Metals in Soil - Cross Section C to C'

4.1.5-5 Total Arsenic in Soil and Groundwater - Cross Section A to A'



12-CWR1710-Remedial Investigation Report xix

LIST OF FIGURES

4.1.5-6 Total Arsenic in Soil and Groundwater - Cross Section B to B'

4.1.5-7 Total Lead in Soil and Groundwater - Cross Section A to A'

4.1.5-8 Total Lead in Soil and Groundwater - Cross Section B to B'

4.1.5-9 Total Manganese in Soil and Groundwater - Cross Section A to A'

4.1.5-10 Total Manganese in Soil and Groundwater - Cross Section B to B'

4.1.5-11 Total Zinc in Soil and Groundwater - Cross Section A to A'

4.1.5-12 Total Zinc in Soil and Groundwater - Cross Section B to B'

4.2.1-1 Current and Historic Building Index in OU2

4.2.1-2 Investigation Areas 1 through 4

4.2.1-3 Investigation Area 5

4.2.1-4 Groundwater WBZ1 and WBZ2 Areas

4.2.2-1a Soil Sampling Locations for Investigation Areas 1 through 4

4.2.2-1b Soil Sampling Locations for Investigation Area 5

4.2.2-2a Surface Soil Sample Arsenic Results

4.2.2-2b Subsurface Soil Sample Arsenic Results

4.2.2-2c Surface Soil Extent of Arsenic Impacts

4.2.2-2d Subsurface Soil Extent of Arsenic Impacts

4.2.2-3a Surface Soil Sample Cadmium Results

4.2.2-3b Subsurface Soil Sample Cadmium Results

4.2.2-3c Surface Soil Extent of Cadmium Impacts

4.2.2-4a Surface Soil Sample Lead Results

4.2.2-4b Subsurface Soil Sample Lead Results

4.2.2-4c Surface Soil Extent of Lead Impacts

4.2.2-4d Subsurface Soil Extent of Lead Impacts

4.2.2-5a Surface Soil Sample Mercury Results

4.2.2-5b Subsurface Soil Sample Mercury Results

4.2.2-5c Surface Soil Extent of Mercury Impacts

4.2.2-5d Subsurface Soil Extent of Mercury Impacts

4.2.2-6a Surface Soil Sample Zinc Results

4.2.2-6b Subsurface Soil Sample Zinc Results



12-CWR1710-Remedial Investigation Report xx

LIST OF FIGURES

4.2.2-7a Surface Soil Sample Other Metals and Cyanide Results

4.2.2-7b Subsurface Soil Sample Other Metals and Cyanide Results

4.2.2-7c Surface Soil Extent of Other Metals Impacts

4.2.2-7d Subsurface Soil Extent of Other Metals Impacts

4.2.2-8a Surface Soil Sample VOC Results

4.2.2-8b Subsurface Soil Sample VOC Results

4.2.2-8c Subsurface Soil Extent of VOC Impacts

4.2.2-9a Surface Soil Sample SVOC Results

4.2.2-9b Subsurface Soil Sample SVOC Results

4.2.2-9c Surface Soil Extent of SVOC Impacts

4.2.2-9d Subsurface Soil Extent of SVOC Impacts

4.2.2-10a Surface Soil Sample PCB Results

4.2.2-10b Subsurface Soil Sample PCB Results

4.2.2-10c Surface Soil Extent of PCB Impacts

4.2.2-10d Subsurface Soil Extent of PCB Impacts

4.2.2-11a Surface Soil Sample Pesticide Results

4.2.2-11b Subsurface Soil Sample Pesticide Results

4.2.2-12 Surface Soil Sample Asbestos Results

4.2.2-13a Surface Soil Sample TCLP and SPLP Results

4.2.2-13b Subsurface Soil Sample TCLP and SPLP Results

4.2.2-14a Surface Soil Sample Arsenic Results – Residential Area/Off-site Area

4.2.2-14b Surface Soil Extent of Arsenic Impacts – Residential Area/Off-site Area

4.2.2-15a Surface Soil Sample Cadmium Results Residential Area/Off-site Area

4.2.2-15b Surface Soil Extent of Cadmium Impacts Residential Area/Off-site Area

4.2.2-16a Surface Soil Sample Lead Results Residential Area/Off-site Area

4.2.2-16b Surface Soil Extent of Lead Impacts Residential Area/Off-site Area

4.2.2-17a Surface Soil Sample Zinc Results Residential Area/Off-site Area

4.2.2-17b Surface Soil Extent of Zinc Impacts Residential Area/Off-site Area

4.2.2-18a Surface Soil Sample Manganese Results - Residential Area/Off-site Area

4.2.2-18b Surface Soil Extent of Manganese Impacts - Residential Area/Off-site Area



12-CWR1710-Remedial Investigation Report xxi

LIST OF FIGURES

4.2.3-1 Building Material Sampling Locations

4.2.3-2 Building Material Arsenic Results

4.2.3-3 Building Material Cadmium Results

4.2.3-4 Building Material Lead Results

4.2.3-5 Building Material Mercury Results

4.2.3-6 Building Material Zinc Results

4.2.3-7 Building Material Other Metals Results

4.2.3-8 Building Material SVOC Results

4.2.3-9 Building Material Pesticide and PCB Results

4.2.3-10 Building Material Asbestos Results

4.2.4-1 Pile Sampling Locations

4.2.4-2 Pile Arsenic Results

4.2.4-3 Pile Cadmium Results

4.2.4-4 Pile Lead Results

4.2.4-5 Pile Mercury Results

4.2.4-6 Pile Zinc Results

4.2.4-7 Pile Other Metals Results

4.2.4-8 Pile SVOC Results

4.2.4-9 Pile Pesticide and PCB Results

4.2.4-10 Pile Asbestos Results

4.2.5-1 Groundwater Well Locations

4.2.5-2 Groundwater Exceedance Summary

4.2.5-3 Dissolved Arsenic in WBZ1 Groundwater December 2008

4.2.5-4 Dissolved Arsenic in WBZ1 Groundwater June 2009

4.2.5-5 Dissolved Arsenic in WBZ2 Groundwater December 2008

4.2.5-6 Dissolved Arsenic in WBZ2 Groundwater June 2009

4.2.5-7 Dissolved Cadmium in WBZ1 Groundwater December 2008

4.2.5-8 Dissolved Cadmium in WBZ1 Groundwater June 2009

4.2.5-9 Dissolved Cadmium in WBZ2 Groundwater December 2008

4.2.5-10 Dissolved Cadmium in WBZ2 Groundwater June 2009



12-CWR1710-Remedial Investigation Report xxii

LIST OF FIGURES

4.2.5-11 Dissolved Lead in WBZ1 Groundwater December 2008

4.2.5-12 Dissolved Lead in WBZ1 Groundwater June 2009

4.2.5-13 Dissolved Lead in WBZ2 Groundwater December 2008

4.2.5-14 Dissolved Lead in WBZ2 Groundwater June 2009

4.2.5-15 Dissolved Zinc in WBZ1 Groundwater December 2008

4.2.5-16 Dissolved Zinc in WBZ1 Groundwater June 2009

4.2.5-17 Dissolved Zinc in WBZ2 Groundwater December 2008

4.2.5-18 Dissolved Zinc in WBZ2 Groundwater June 2009

4.2.5-19 Dissolved Cobalt in WBZ1 Groundwater December 2008

4.2.5-20 Dissolved Cobalt in WBZ1 Groundwater June 2009

4.2.5-21 Dissolved Cobalt in WBZ2 Groundwater December 2008

4.2.5-22 Dissolved Cobalt in WBZ2 Groundwater June 2009

4.2.5-23 Dissolved Manganese in WBZ1 Groundwater December 2008

4.2.5-24 Dissolved Manganese in WBZ1 Groundwater June 2009

4.2.5-25 Dissolved Manganese in WBZ2 Groundwater December 2008

4.2.5-26 Dissolved Manganese in WBZ2 Groundwater June 2009

4.2.5-27 Maximum VOC Results in Groundwater

4.2.6-1 Surface Water Sampling Locations

4.2.6-2 Maximum Surface Water Arsenic Results

4.2.6-3 Maximum Surface Water Cadmium Results

4.2.6-4 Maximum Surface Water Lead Results

4.2.6-5 Maximum Surface Water Mercury Results

4.2.6-6 Maximum Surface Water Zinc Results

4.2.6-7 Maximum Surface Water Other Metals Results

4.2.7-1 Asbestos Air Sampling Locations

4.3.3-1 Southern and Slag Pile Border Areas: Soil Sampling Locations

4.3.3-2 Little Vermilion River and Slag Pile Border Areas: Monitoring Well Locations



12-CWR1710-Remedial Investigation Report xxiii

LIST OF TABLES

VOLUME 4

2.1.1-1 Phase I and Phase II Sample Information for OU1

2.1.2-1 Monitoring Well Construction Details

2.1.3-1 Phase I Analytical Program at OU1

2.1.3-2 Interstitial Water Level Data from OU1

2.2.1-1 Phase I and II Sample Information For All Matrices

2.2.1-2a Phase I Soil Boring Depths, Sampled Intervals, and Lithologies

2.2.1-2b Phase II Soil Boring Depths, Sampled Intervals, and Lithologies

2.2.1-3 Analytical Method Summary

2.2.2-1 Monitoring Well Installation and Development Summary

2.2.2-2 Summary of Monitoring Well Groundwater Sample Analyte Groups

2.2.2-3 Phase I and II Water Quality Parameters

2.2.2-4 Phase II Slug Test Summary

2.2.8-1 Asbestos Air Sampling Data

3.2.3-1 Summary of the Hydraulic Conductivity Testing for OU1 Wells

3.2.3-2 OU1 Water Levels in the Sampling Points and the LVR

3.3.3-1 OU2 Monitoring Well Details and WBZ Designations

3.3.3-2 OU2 Monitoring Well Depths and Quarterly Groundwater Elevations

3.3.3-3 OU2 Monitoring Well Hydraulic Conductivity Values

3.4.2-1 Site and Vicinity Geologic Units

5.1-1 Chemical Properties for Organic Contaminants of Concern

5.1.2-1 Potential Forms, Immobilization and Mobilization Mechanisms for Inorganic

Contaminants of Concern

5.4.1-1 Sequential Extraction Procedure Analytical Summary

5.4.1-2 Sequential Extraction Procedure Data Summary - Average Relative Fractions

5.4.1-3 Soil SEP Identification of Controlling Immobilization Processes and Conditions That

May Increase Inorganic Mobility

5.4.1-4 SPLP Data Summary - Terrestrial Soils

5.4.1-5 SPLP Mass Summary - Terrestrial Soils and Slag

5.4.1-6 Sediment SPLP Data Summary



12-CWR1710-Remedial Investigation Report xxiv

LIST OF TABLES

5.4.1-7 Specialized Leachability Procedure Results

5.4.1-8 Plant Area Soils TCLP Results

5.4.1-9 Slag Pile Area Soils TCLP Results

5.4.1-10 Sediment TCLP Results

5.5.1-1 Soil-to-Groundwater Comparison Results

5.5.1-2 Comparison of Soil-to-Groundwater Basis Values and SPLP Values

5.5.2-1 OU2 Average Groundwater Geochemistry Values

6.3.5-1 Summary of COI Exceedances for OU1 and OU2

9.5.1-1 OU1 Data Limitations and Uncertainties

9.5.1-2 OU2 Data Limitations and Potential Future Field Investigation Recommendations

VOLUME 5

4.0-1 Screening Values for Soil, Air, Groundwater, Sediment, and Surface Water Samples

4.1.2-1 Summary of Historical Analyses Conducted on Shallow Soil Samples

4.1.2-2 Summary of Historical Analyses Conducted on Deep Soil Samples

4.1.2-3 Summary of Analytical Data for Shallow Soil Samples from the Plant Area that

Exceeded Screening Values

4.1.2-4 Summary of Analytical Data for Deep Soil Samples from the Plant Area that Exceeded

Screening Values

4.1.2-5 Metals Results for Shallow Soil Samples Collected from the Plant Area

4.1.2-6 Metals Results for Deep Soil Samples Collected from the Plant Area

4.1.2-7 VOC Results for Shallow Soil Samples Collected from the Plant Area

4.1.2-8 VOC Results for Deep Soil Samples Collected from the Plant Area

4.1.2-9 SVOC Results for Shallow Soil Samples Collected from the Plant Area

4.1.2-10 SVOC Results for Deep Soil Samples Collected from the Plant Area

4.1.2-11 PCB Results for Shallow Soil Samples Collected from the Plant Area

4.1.2-12 PCB Results for Deep Soil Samples Collected from the Plant Area

4.1.2-13 Other Inorganics Results for Shallow Soil Samples Collected from the Plant Area

4.1.2-14 Other Inorganics Results for Deep Soil Samples Collected from the Plant Area

4.1.2-15 Summary of Analytical Data for Shallow Soil Samples from the Slag Pile Area that




12-CWR1710-Remedial Investigation Report xxv

LIST OF TABLES

4.1.2-16 Summary of Analytical Data for Deep Soil Samples from the Slag Pile Area that


4.1.2-17 Metals and Cyanide Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-18 Metals and Cyanide Results for Deep Soil Samples Collected from the Slag Pile

4.1.2-19 VOC Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-20 VOC Results for Deep Soil Samples Collected from the Slag Pile

4.1.2-21 SVOC Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-22 SVOC Results for Deep Soil Samples Collected from the Slag Pile

4.1.2-23 PCB Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-24 Pesticides Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-25 Other Inorganics Results for Shallow Soil Samples Collected from the Slag Pile

4.1.2-26 Other Inorganics Results for Deep Soil Samples Collected from the Slag Pile

4.1.3-1 Summary of Historical Analyses Conducted on Groundwater Samples

4.1.3-2 Summary of Analytical Data for Groundwater Samples from the Plant Area that


4.1.3-3 Metals and Cyanide Results for Groundwater Samples Collected from the Plant Area

4.1.3-4 VOC Results for Groundwater Samples Collected from the Plant Area

4.1.3-5 SVOC Results for Groundwater Samples Collected from the Plant Area

4.1.3-6 Other Inorganics Results for Groundwater Samples Collected from the Plant Area

4.1.3-7 Summary of Analytical Data for Groundwater Samples from the Slag Pile Area that


4.1.3-8 Inorganic COI Results for Groundwater Samples Collected from the Slag Pile

4.1.3-9 SVOC Results for Groundwater Samples Collected from the Slag Pile

4.1.3-10 Other Inorganics Results for Groundwater Samples Collected from the Slag Pile

4.1.4-1 Summary of Historical Analyses Conducted on Sediment Samples

4.1.4-2 Summary of Historical Analyses Conducted on Surface Water Samples

4.1.4-3 Summary of Analytical Data for Sediment Samples from the Slag Pile Area that


4.1.4-4 Inorganic COI Results for Sediment Samples Collected from the Slag Pile

4.1.4-5 VOC Results for Sediment Samples Collected from the Slag Pile

4.1.4-6 SVOC Results for Sediment Samples Collected from the Slag Pile



12-CWR1710-Remedial Investigation Report xxvi

LIST OF TABLES

4.1.4-7 PCB Results for Sediment Samples Collected from the Slag Pile

4.1.4-8 Other Inorganic Results for Sediment Samples Collected from the Slag Pile

4.1.4-9 Summary of Analytical Data for Sediment Samples from the Little Vermilion River that


4.1.4-10 Summary of Analytical Data for Surface Water Samples from the Little Vermilion River

that Exceeded Screening Values

4.1.4-11 Inorganic COI Results for Sediment Samples Collected from the Little Vermilion River

4.1.4-12 Metals and Cyanide Results for Surface Water Samples Collected from the Little

Vermilion River

4.1.4-13 VOC Results for Sediment Samples Collected from the Little Vermilion River

4.1.4-14 VOC Results for Surface Water Samples Collected from the Little Vermilion River

4.1.4-15 SVOC Results for Sediment Samples Collected from the Little Vermilion River

4.1.4-16 PCB Results for Sediment Samples Collected from the Little Vermilion River

4.1.4-17 Pesticides Results for Sediment Samples Collected from the Little Vermilion River

4.1.4-18 Other Inorganics Results for Sediment Samples Collected from the Little Vermilion

River

4.1.4-19 Other Inorganics Results for Surface Water Samples Collected from the Little Vermilion

River

4.1.7-1 Air Monitoring Results for Arsenic, Lead, and Asbestos

4.2.1-1 Current and Historical Buildings and Uses

4.2.2-1a Detected Soil Metals and Cyanide Results

4.2.2-1b Detected XRF-Screened Soil Metals and Cyanide Results

4.2.2-2 Detected Soil VOC Results

VOLUME 6

4.2.2-3 Detected Soil SVOC Results

4.2.2-4a Detected Soil PCB Results

4.2.2-4b Detected Soil PCB Results and PCB Test Kit Results

4.2.2-5 Detected Soil Pesticide Results

4.2.2-6 Detected Soil Asbestos Results

4.2.2-7 Detected Soil TCLP Metals Results

4.2.2-8a Detected Soil SPLP Metals Results – Regulatory Level SV



12-CWR1710-Remedial Investigation Report xxvii

LIST OF TABLES

4.2.2-8b Detected Soil SPLP Metals Results – GWSV

4.2.2-9 Detected XRF-Screened Soil Metals Results Residential Area/Off-site Area

4.2.3-1 Detected Building Material Metals and Cyanide Results

4.2.3-2 Detected Building Material VOC Results

4.2.3-3 Detected Building Material SVOC Results

4.2.3-4 Detected Building Material PCB Results

4.2.3-5 Detected Building Material Pesticide Results

4.2.3-6 Detected Building Material Asbestos Results

4.2.3-7 Detected Building Material TCLP Metals Results

4.2.4-1 Detected Pile Metals and Cyanide Results

4.2.4-2 Detected Pile VOC Results

4.2.4-3 Detected Pile SVOC Results

4.2.4-4 Detected Pile PCB Results

4.2.4-5 Detected Pile Pesticide Results

4.2.4-6 Detected Pile Asbestos Results

4.2.5-1 Summary of Groundwater Analyte Group Sampling Per Monitoring Well

4.2.5-2 Summary of MCL and RSL Exceedances in Groundwater per Monitoring Well Location

4.2.5-3 Detected Groundwater Metals and Cyanide Results

4.2.5-4 Detected Groundwater VOC Results

4.2.5-5 Detected Groundwater SVOC Results

4.2.5-6 Detected Groundwater PCB Results

4.2.5-7 Detected Groundwater Pesticide Results

4.2.6-1 Summary of Surface Water Sampling Events

4.2.6-2 Detected Surface Water Metals and Cyanide Results

4.2.6-3 Detected Surface Water VOC Results

4.2.6-4 Detected Surface Water SVOC Results

4.2.6-5 Detected Surface Water Pesticide Results

4.2.7-1 Summary of Air Asbestos Results

4.3.1-1 Summary of Constituents of Interest Exceeding Screening Values for OU1

4.3.2-1 OU2 Summary of Results



12-CWR1710-Remedial Investigation Report xxviii

LIST OF TABLES

4.3.3-1 Border Area List of Soil Samples and Analyte Groups

4.3.3-2 Summary of SV Exceedances in Soil Boring: Border Areas

4.3.3-3 Border Area List of Groundwater Samples and Analyte Groups

4.3.3-4 Summary of SV Exceedances in Groundwater Monitoring Wells: Little Vermilion River

and Slag Pile Border Areas



12-CWR1710-Remedial Investigation Report xxix

LIST OF APPENDICES

SEE GEOSYNTEC DISK 1 OF 2

G-2-1 OU1 Boring Logs for All Borings and Monitoring Wells

G-2-2 OU1 Well Construction Logs

G-2-3 OU1 Historical Groundwater Level Data

G-2-4 OU1 Well Development Records

G-4-1a Data Validation Reports, COCs, Analytical Lab Reports

G-4-1 OU1 Soil Metals Results

G-4-2 OU1 Soil VOC Results

G-4-3 OU1 Soil SVOC Results

G-4-4 OU1 Soil PCB Results

G-4-5 OU1 Soil Pesticide Results

G-4-6 OU1 Soil Other Inorganics Results

G-4-7 OU1 Soil TCLP Results

G-4-8 OU1 Soil SEP Results

G-4-9 OU1 Groundwater Metals Results

G-4-10 OU1 Groundwater VOC Results

G-4-11 OU1 Groundwater SVOC Results

G-4-12 OU1 Groundwater PCB Results

G-4-13 OU1 Groundwater Pesticide Results

G-4-14 OU1 Groundwater Other Inorganics Results

G-4-15 OU1 Sediment Metals Results

G-4-16 OU1 Sediment VOC Results

G-4-17 OU1 Sediment SVOC Results

G-4-18 OU1 Sediment PCB Results

G-4-19 OU1 Sediment Pesticide Results

G-4-20 OU1 Sediment Other Inorganics Results

G-4-21 OU1 Sediment TCLP Results

G-4-22 OU1 Sediment SEP Results

G-4-23 OU1 Sediment AVS-SEM Results

G-4-24 OU1 Surface Water Metals Results



12-CWR1710-Remedial Investigation Report xxx

LIST OF APPENDICES

G-4-25 OU1 Surface Water VOC Results

G-4-26 OU1 Surface Water SVOC Results

G-4-27 OU1 Surface Water PCB Results

G-4-28 OU1 Surface Water Pesticide Results

G-4-29 OU1 Surface Water Other Inorganics Results

G-5-1 SPLP Scatter Plots (former Appendix B)

G-5-2 Leachability Test Results

SEE SULTRAC DISK 1 OF 2

S-1 Phase I and Phase II Soil Boring Logs

S-2 Standard Operating Procedures for Field Work

S-3 Phase I and Phase II Monitoring Well Installation Logs

S-4 Hvorslev Method (Details and Calculations)

S-5 Ecological Habitat Evaluation, Technical Memorandum, Internal Draft

S-6 Monitoring Well and Piezometer Construction Logs

S-7 Natural Gamma Downhole Logs

S-8 Data Validation Reports

S-9 US EPA FIELDS Report Detailing XRF Correlations

SEE SULTRAC DISK 2 OF 2

S-10 Soil Metals Results Data

S-11 Soil VOC Results Data

S-12 Soil SVOC Results Data

S-13 Soil PCB Results Data

S-14 Soil Pesticide Results Data

S-15 Soil Asbestos Results Data

S-16 Soil TCLP Metals Results Data

S-17 Soil SPLP Metals Results Data – Regulatory Level SV

S-18 Soil SPLP Metals Results Data – GWSV

S-19 Background Soil Metals Results Data

S-20 Background Soil SVOC Results Data

S-21 Building Materials Metals Results Data



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LIST OF APPENDICES

S-22 Building Materials VOC Results Data

S-23 Building Materials SVOC Results Data

S-24 Building Materials PCB Results Data

S-25 Building Materials Pesticide Results Data

S-26 Building Materials Asbestos Results Data

S-27 Building Materials TCLP Metals Results Data

S-28 Pile Metals Results Data

S-29 Pile VOC Results Data

S-30 Pile SVOC Results Data

S-31 Pile PCB Results Data

S-32 Pile Pesticide Results Data

S-33 Pile Asbestos Results Data

S-34 Groundwater Metals Results Data

S-35 Groundwater Metals Results, Figures 1 through 36

S-36 Groundwater Other Metals Results, Figures 1 through 6

S-37 Groundwater VOC Results Data

S-38 Groundwater VOC Results, Figures 1 through 4

S-39 Groundwater SVOC Results Data

S-40 Groundwater PCB Results Data

S-41 Groundwater Pesticide Results Data

S-42 Surface Water Metals Results Data

S-43 Surface Water VOC Results Data

S-44 Surface Water SVOC Results Data

S-45 Surface Water PCB Results Data

S-46 Surface Water Pesticide Results Data

SEE GEOSYNTEC DISK 2 OF 2

Appendix RA Final Risk Assessment



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ACRONYMS AND ABBREVIATIONS

μg/kg Microgram per Kilogram

μg/L Microgram per Liter

μg/m3 Microgram per Cubic Meter

µm Micron or Micrometer

ABS Activity-Based Sampling

ADD Average Daily Dose

AE Assessment Endpoint

AES Atomic Emission Spectroscopy

AL Action Level

ALM Adult Lead Model

ANOVA Analysis of Variance

AOC Administrative Order on Consent

ASAOC Administrative Settlement Agreement and Order on Consent

ASO Abandoned Sewer Outfall

AST Aboveground Storage Tank

ASTM American Society for Testing and Materials International

ATSDR Agency for Toxic Substance and Disease Registry

ATV All-Terrain Vehicle

AVS Acid Volatile Sulfides

BAR Biological Assessment Report

BERA Baseline Ecological Risk Assessment

bgs Below Ground Surface

BTAG US EPA Region 9 Biological Technical Assistance Group

BTEX Benzene, Toluene, Ethylbenzene, and Xylene

BTV Background Threshold Value

CalEPA California Environmental Protection Agency

Carus Carus Chemical Company



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CERCLA Comprehensive Environmental Response, Compensation, and Liability Act

CFR Code of Federal Regulations

CLP Contract Laboratory Program

cm Centimeter

cm/s Centimeter per Second

COC Constituent of Concern

COI Chemicals of Interest

Consensus Document “Technical Approach Consensus Document, Human Health and Ecological

Risk Assessments”

COPC Constituent of Potential Concern

COPEC Chemical of Potential Ecological Concern

CRQL Contract-Required Quantitation Limit

CSM Conceptual Site Model

CSO Combined Sewer Overflow

CTE Central Tendency Exposure

cVOC Chlorinated Volatile Organic Compound

CWA Clean Water Act

DCE Dichloroethene

DO Dissolved Oxygen

DQO Data Quality Objective

Ds Simpson’s Index of Diversity

EA Exposure Area

EF Exposure Frequency

ELCR Excess Lifetime Cancer Risk

EPC Exposure Point Concentration

ERA Ecological Risk Assessment

ESL Ecological Screening Level (US EPA Region 5)

ERT Emergency Response Team



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ESV Ecological Screening Value

ET Exposure Time

f/cc Fiber per Cubic Centimeter

Fibers/mL Fibers per Milliliter

FCM Food Chain Model

fIBI Fish Community Index of Biotic Integrity

FIELDS Field Environmental Decision Support

FS Feasibility Study

FSP Field Sampling Plan

ft2 Square Foot

ft/ft Foot per Foot

g/cc Grams per Cubic Centimeter

Geosyntec Geosyntec Consultants

GPM Gallons per Minute

GPS Global Positioning System

GWSV Groundwater Screening Value

H’ Shannon Weiner Diversity Index

HEAST Health Effects Assessment Summary Table

HHRA Human Health Risk Assessment

HI Hazard Index

HQ Hazard Quotient

I&M Illinois and Michigan

IBI Index of Biotic Integrity

ICP Inductively Coupled Plasma

ICRR Illinois Central Railroad

IDNR Illinois Department of Natural Resources



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IDPH Illinois Department of Public Health

IEPA Illinois Environmental Protection Agency

IEUBK Integrated Exposure Uptake Biokinetic Model

IRIS Integrated Risk Information System

IRSL Industrial Regional Screening Level

ISGS Illinois State Geological Survey

ISO International Organization for Standardization

IURLTL Less-Than-Lifetime Inhalation Unit Risk

IUR Inhalation Unit Risk

IWQS Illinois Water Quality Standard

Kd Potential for Adsorption

KH Henry's Law Constant

KOC Adsorption Coefficient for Organic Carbon

KOW Octanol-Water Partition Coefficient

LNAPL Light Non-Aqueous Phase Liquid

LOAEL Lowest Observed Adverse Effects Level

LRM LaSalle Rolling Mill

LVR Little Vermilion River

MBI Macroinvertebrate Biotic Integrity

MCE Mixed Cellulose Ester

MCL Maximum Contaminant Level

mIBI Macroinvertebrate Community Index of Biotic Integrity

MEK 2-Butanone (Methyl Ethyl Ketone)

mg/kg Milligram per Kilogram

mg/L Milligram per Liter

mm Millimeter

MOU Memorandum of Understanding



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MRL Minimal Risk Level

MS Matrix Spike

MSD Matrix Spike Duplicate

msl Mean Sea Level

mV Millivolt

MW Monitoring Well

NAD North American Datum

NGVD National Geodetic Vertical Datum

NOAA National Oceanic and Atmospheric Administration

NIOSH National Institute for Occupational Safety and Health

NOAEL No Observable Adverse Effects Level

NPDES National Pollutant Discharge Elimination System

NPL National Priorities List

NRCS Natural Resource Conservation Service

NRWQC National Recommended Water Quality Criteria

NWI National Wetland Inventory

OCL Organochlorine

ORP Oxidation Reduction Potential

OSHA Occupational Safety and Health Administration

OU Operable Unit

OU1 Operable Unit 1

OU2 Operable Unit 2

Pmc Bond Formation of the McLeansboro Group

PAH Polynuclear Aromatic Hydrocarbon

PCB Polychlorinated Biphenyl

PCE Tetrachloroethene

PDC Pyridine Dicarboxylic Acid



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PEC Probable Effects Concentration

PID Photoionization Detector

PPE Personal Protective Equipment

ppm Part per Million

ppmv Part per Million by Volume

PPRTV Provisional Peer Reviewed Toxicity Value

PRG Preliminary Remediation Goal

PRP Potentially Responsible Party

PSI Preliminary Site Investigation

PTFE Polytetrafluoroethylene

PVC Polyvinyl Chloride

Qaf Quaternary Age (Late Holocene) Artificial Fill

QAPP Quality Assurance Project Plan

QC Quality Control

Qe Equality Formation of the Quaternary System

Qly Lemont Formation of the Quaternary System

RA Risk Assessment

RAC Remedial Action Contract

RAFS Releasable Asbestos Field Sampler

RAGS Risk Assessment Guidance for Superfund

RAT Rapid Assessment Tool

RCRA Resource Conservation and Recovery Act

RfC Reference Concentration

RfD Reference Dose

RI Remedial Investigation

RME Reasonable Maximum Exposure

RO Remediation Objective

ROD Record of Decision



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RRSL Residential Regional Screening Level

RSL Regional Screening Level

SAP Sampling and Analysis Plan

SB Soil Boring

SEM Simultaneously Extracted Metals

SEP Sequential Extraction Procedure

SF Slope Factor

SLERA Screening Level Ecological Risk Assessment

SMDP Scientific Management Decision Point

SOP Standard Operating Procedure

SOW Statement of Work

SPLP Synthetic Precipitation Leaching Procedure

SSI Screening Site Inspection

SSL Soil Screening Level

START Superfund Technical Assessment and Response Team

SU Standard Unit

SV Screening Value

SVOC Semivolatile Organic Compound

SW ESV Surface Water Ecological Screening Value

SWSV Surface Water Screening Value

TACO Tiered Approach to Corrective Action Objectives

TAL Target Analyte List

TCE Trichloroethene

TCL Target Compound List

TCLP Toxicity Characteristic Leaching Procedure

TEC Threshold Effects Concentration

TEM Transmission Electron Microscopy

TOC Total Organic Carbon



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TR Target Risk

TRV Toxicity Reference Value

UCL Upper Confidence Limit

URF Unit Risk Factor

USACE United States Army Corps of Engineers

USDA United States Department of Agriculture

US EPA United States Environmental Protection Agency

USFWS United States Fish and Wildlife Service

VC Vinyl Chloride

VDEQ Virginia Department of Environmental Quality

VF Volatilization Factor

VOC Volatile Organic Compound

WA Work Assignment

WBZ Water-Bearing Zone

Weston Weston Solutions, Inc.

XRF X-Ray Fluorescence



12-CWR1710-Remedial Investigation Report ES-1

EXECUTIVE SUMMARY

The Matthiessen and Hegeler Zinc Company Site (Site) located in LaSalle, LaSalle County, Illinois, is a

former zinc smelting and rolling facility listed on the National Priorities List (NPL). The United States

Environmental Protection Agency (US EPA) and the potentially responsible parties (PRP) are addressing

the Site through a remedial investigation (RI) and feasibility study (FS). This RI report presents the

results of the RI as required under an Administrative Settlement Agreement and Order on Consent

(ASAOC), Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)

Docket No. V-W-06-C-856 dated October 6, 2006, between US EPA Region 5 and Carus Corporation

and Carus Chemical Company (Carus). This report characterizes the nature and extent of risks posed by

the Site and documents the data collection efforts and analyses performed that will support the

preparation of the FS.

For the RI/FS, the Site was divided into two operable units (OU). On OU1, Geosyntec Consultants

(Geosyntec) is conducting RI/FS activities on behalf of Carus. On OU2, US EPA’s contractor, SulTRAC,

is conducting RI/FS activities. This RI report was prepared jointly by Geosyntec and SulTRAC.

OU1 occupies about 47 acres and was divided into three areas for the RI: the Carus Plant Area, the Slag

Pile Area, and the Little Vermilion River (LVR). For over 90 years and continuing today, the Carus Plant

has manufactured potassium permanganate and other specialty chemicals. These operations are not

related to the contamination under investigation. The main feature in the Slag Pile Area is a waste pile,

approximately 3,000 feet (ft) long and 80 to 90 ft tall, resulting from the former smelti

FINAL REMEDIAL INVESTIGATION REPORT1500 Eighth Street P.O. Box 1500 LaSalle, Illinois 61301-3500...

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Transcript of FINAL REMEDIAL INVESTIGATION REPORT1500 Eighth Street P.O. Box 1500 LaSalle, Illinois 61301-3500...