Rowe Industries Superfund Site Sag Harbor, New York

DRAFT FINAL RISK ASSESSMENT REVISION 1 ROWE INDUSTRIES SUPERFUND SITE SAG HARBOR, NEW YORK

Prepared for: U.S. Environmental Protection Agency

Contract No.: 68-W9-0003 Work Assignment No.: C02069

TRC TRC Environmental Corporation ______o

N> XI 1 .j DRAFT FINAL RISK ASSESSMENT REVISION 1 ROWE INDUSTRIES SUFERFUND SITE "~~" SAG HARBOR, NEW YORK

Prepared for

U.S. ENVIRONMENTAL PROTECTION AGENCY Emergency and Remedial Response Division 26 Federal Plaza New York, New York, 10278

Work Assignment No.: C02069 EPA Region: II EPA Site/Facility I.D. No.: NYD981486954 Contract No.: 68-W9-0003 (TES 6) TRC Document No.: A92-338 TRC Project No.: 1-635-208-0-2PE3-0 TRC Project Manager: Gregory Dripps Telephone No.: (508) 970-5600 Subcontract No.: N/A Subcontractor Project Manager: N/A Telephone No.: N/A EPA Work Assignment Manager Linda Wood Telephone No.: (212) 264-8585 Date Prepared: August 21, 1992

TRC ENVIRONMENTAL CORPORATION c 291 Broadway, Suite 1206 New York, New York 10007 (212) 349-4616 N- CO

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A92-338.txt 11 RECYCLED PAPER ENFORCEMENT CONFIDENTIAL 7WC TABLE OF CONTENTS

Section Pace

1.0 INTRODUCTION ...... 1-1 1.1 Overview ...... 1-1 1.2 Site Description ...... 1-3 1.3 Site History ...... 1-6 1.4 Summary of Site Investigations ...... 1-9 1.5 Summary of Site Contamination ...... 1-10 1.5.1 Ground Water Contamination ...... 1-10 1.5.2 Soils Contamination ...... 1-14 1.5.3 Dry Well Contamination ...... 1-15 1.5.4 Sediment Contamination ...... 1-16 1.5.5 Surface Water Contamination ...... 1-17

2.0 HAZARD IDENTIFICATION ...... 2-1 2.1 Data Evaluation ...... 2-1 2.1.1 Data Sources ...... 2-1 2.1.2 Data Analysis ...... 2-11 2.2 Selection of Contaminants of Concern ...... 2-16 2.2.1 Background ...... 2-16 2.2.2 Methodology ...... 2*16 2.2.3 Medium-Specific Selection of Contaminants of Concern ...... 2-22

3.0 CONTAMINANT FATE AND TRANSPORT ...... 3-1 3.1 Introduction ...... 3-1 3.2 Potential Routes of Migration ...... 3-1 3.2.1 Ground Water Transport ...... 3-4 3.2.2 Surface Transport ...... 3-5 3.2.3 Contaminant Releases to Air ...... 3-5 3.3 Contaminant Persistence and Migration ...... 3-5 3.3.1 Ground Water ...... 3-6 3.3.2 Surface Soils ...... 3-6 3.3.3 Subsurface Soils ...... 3-7 3.3.4 Dry Well Sediments ...... 3-8 3.3.5 Ligonee Brook Surface Water and Sediments ...... 3-9

4.0 EXPOSURE ASSESSMENT ...... 4-1 g 4.1 Introduction ...... 4-1 s: 4.2 Characterization of Exposure Setting ...... 4-2 4.3 Identification of Exposure Pathways ...... 4-3 o 4.3.1 Media and Exposure Routes of Concern ...... 4-4 *"" 4.3.2 Summary of Exposure Pathways Considered ...... 4-9 >-

A92-338.txt iii RECYCLED PAPER ENFORCEMENT CONFIDENTIAL THC TABLE OF CONTENTS (CONTINUED)

Section Page x- 4.4 Exposure Scenarios ...... 4-9 4.4.1 Present and Future Scenarios ...... 4-9 4.4.2 Exposure Parameters ...... 4-14 4.5 Quantification of Exposure ...... 4-15 4.5.1 Estimation of Exposure Point Concentrations ...... 4-15 4.5.2 Exposure Doses ...... 4-16

5.0 TOXICITY AND DOSE - RESPONSE ASSESSMENT ...... 5-1 5.1 Introduction ...... 5-1 5.2 Carcinogenic Effects ...... 5-4 5.3 Noncarcinogenic Effects ...... 5-12 5.3.1 General Method ...... 5-12 5.3.2 Chemical-Specific Considerations ...... 5-23

6.0 RISK CHARACTERIZATION ...... 6-1 6.1 Introduction ...... 6-1 6.2 General Methodology ...... 6-1 6.2.1 Carcinogenic Risk ...... 6-2 6.2.2 Noncarcinogenic Effects ...... 6-3 6.3 Risk Summary ...... 6-4 6.3.1 Ground Water ...... 6-8 ,_ 6.3.2 Surface Soils ...... 6-10 6.3.3 Subsurface Soils ...... 6-11 6.3.4 Dry Well Sediments ...... 6-12 6.3.5 Ligonee Brook Sediments ...... 6-12 6.3.6 Ligonee Brook Surface Water ...... 6-12 6.3.7 Onsite Pond Surface Water and Sediments ...... 6-12

7.0 DISCUSSION OF UNCERTAINTIES ...... 7-1 7.1 Introduction ...... 7-1 7.2 General Methodological Uncertainties ...... 7-2 7.2.1 Site Characterization ...... 7-2 7.2^ Toxicological Information ...... 7-2 7.2.3 Exposure Assumptions ...... 7-3 7.2.4 Dermal Contact Pathway ...... 7-4 g 7.2.5 Risk Characterization ...... 7-4 i 7.3 Site-Specific Uncertainties ...... 7-5 o

A92-338.txt iv RECYCLED PAPER ENFORCEMENT CONROENDAL 7HC TABLE OF CONTENTS (CONTINUED)

Section Pace 8.0 ECOLOGICAL RISK ASSESSMENT ...... 8-1 8.1 Introduction ...... 8-1 8.1.1 Background ...... 8-1 8.1.2 General Methodology ...... 8-1 8.2 Habitat and Species Characterization ...... 8-2 8.2.1 Onsite Habitats ...... 8-2 8.2.2 Offsite Habitats ...... 8-6 8.2.3 Regionally Significant Habitats ...... 8-7 8.2.4 Regional Species Profile ...... 8-8 8.3 Exposure Potential ...... 8-13 8.3.1 Contaminants of Concern ...... 8-13 8.3.2 Exposure Pathways ...... 8-19 8.4 Risk Characterization ...... 8-19 8.4.1 Ligonee Brook Surface Waters ...... 8-20 8.4.2 Ligonee Brook Sediments ...... 8-21 8.4.3 Onsite Surface Soils ...... 8-21 8.5 Uncertainties ...... 8-22

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

10.0 REFERENCES ...... 10-1

Appendices Page

A Concentration Data Summaries ...... A-l B Toxicity Values for all Detected Contaminants ...... B-1 C Risk Spreadsheets ...... C-I D Toxicity Profiles ...... D-l

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A92-338.txt v RECYCLED PAPER ENFORCEMENT CONFIDENTIAL 7WC TABLE OF CONTENTS (CONTINUED) TABLES Number Page 2-1 Samples Included in the Rowe Site Risk Assessment ...... 2-2 2-2 Background Concentrations of Inorganics in Soils for the Rowe Site and the Eastern U.S. (mg/kg) ...... 2-19 2-3 Background Concentrations of Inorganics in Ground Water for the Rowe Site (rag/1)...... 2-21 2-4 Contaminants of Concern for the Rowe Site ...... 2-23 3-1 Physical and Chemical Properties of Contaminants of Concern ...... 3-2 4-1 Rowe Industries Ground Water Contamination Site: Summary of Exposure Pathways ...... 4-10 4-2 Exposure Pathway: Ingestion of Ground Water by Local Resident for Future Scenario ...... 4-18 4-3 Exposure Pathway: Inhalation of Contaminants Volatilized from Ground Water When Local Residents Shower for Future Scenario 4-19 4-4 Exposure Pathway: Ingestion of Surface Soils by Resident for Future Scenario ...... 4-20 4-5 Exposure Pathway: Incidental Ingestion of Subsurface Soils by Excavation Workers for Future Scenario ...... 4-21 4-6 Exposure Pathway: Incidental Ingestion of Subsurface Soils by Utility Workers for Present and Future Scenarios ...... 4-22 4-7 Exposure Pathway: Ingestion of Sediments from Ligonee Brook by Local Residents for Present and Future Scenarios ...... 4-23 4-8 Exposure Pathway: Incidental Ingestion of Dry Well Sediments by Utility Workers for Present scenario ...... 4-24 5-1 Toxicity Values for the Rowe Site Contaminants of Concern ...... 5-2 5-2 Potential Carcinogenic Effects of Rowe Site COCs ...... 5-5 5-3 the EPA Weight-of-Evidence for Human Carcinogenicity (EPA, 1986b) ...... 5-9 5-4 EPA Carcinogenicity Weight-of-Evidence Criteria for Human and Animal data (EPA, 1986b) ...... 5-10 5-5 Potential Chronic Noncarcinogenic Effects of Rowe Site COCs ...... 5-14 5-6 Potential Subchronic Noncarcinogenic Effects of Rowe Site COCs ...... 5-20 6-1 Medium-Specific Summary of Carcinogenic Risk Estimates for the Rowe Site . . 6-5 6-2 Medium-Specific Summary of Noncarcinogenic Hazard Indices (His) for the Rowe Site ...... 6-6 6-3 Receptor-Specific Summary of Total Site Risks for the Rowe Site ...... 6-7 8-1 Species Expected to Inhabit the Vicinity of the Rowe Industries Site ...... 8-3 8-2 Significant Species and Communities Within Two Miles of the Route Industries Site ...... 8-14

A92-338.txt vi RECYCLED PAPER ENFORCEMENT CONFIDENTIAL TRC TABLE OF CONTENTS (CONTINUED)

Number Page

8-3 Comparison of Ligonee Brook Surface Water Contaminant Concentrations With State and Federal Water Quality Criteria (ng/1) ...... 8-16 8-4 Comparison of Ligonee Brook Sediment Contaminant Concentrations With State and Federal Sediment Criteria (jig/kg) ...... 8-18

FIGURES

Number Page

1-1 Location Map ...... 1-4