Lower Ecorse Creek Dump Site Is in a Public Park
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us EPA RECORDS CENTER REGION 5 494413 Third Five-Year Review Report for the Lower Ecorse Creek Dump Superfund Site Wyandotte, Wayne County, Michigan s sa Prepared by: U.S. Environmental Protection Agency Region 5 Chicago, Illinois (2^ e 16^ Richard C. Karl, Director Date Superfund Division U.S. EPA Region 5 Cover photo: A portion of the Lower Ecorse Creek Dump site is in a public park. (Photo by William Ryan, August 19, 2015.) 11 TABLE OF CONTENTS Table of Contents iii List of Acronyms v Executive Summary vi Five-Year Review Summary Form vii I. Introduction , 1 II. Progress Since the Last Review 2 Institutional Controls 2 III. Five-Year Review Process 4 Administrative Components 4 Community Notification and Involvement 4 Document Review 4 Data Review 5 Site Inspection 5 Interviews.. 5 IV. Technical Assessment 6 Question A: Is the remedy functioning as intended by the decision documents? 6 Question B: Are the exposure assumptions, toxicity data, cleanup levels, and remedial action objectives used at the time of the remedy selection still valid? 6 Question C: Has any other information come to light that could call into question the protectiveness of the remedy? 6 Technical Assessment Summary 7 V. Issues/Recommendations and follow-up Actions 7 VI. Protectiveness Statement 7 111 Table of Contents (Continued) VII, Next Review .....7 Tables Table I - Protectiveness Determinations/Statements from the 2009 FYR 2 Table 2 - Summary of Planned and/or Implemented ICs 3 Table 3 - Site Chronology 8 Appendix A - Existing Site Information Site Chronology 8 Background 9 Physical Characteristics 9 Hydrology 9 Land and Resource Use 9 History of Contamination 10 Initial Response 10 Basis for Taking Action ; 11 Remedial Actions 11 Remedy Selection 11 Remedy Implementation 12 Appendix B - Site map, photos, and Restrictive Covenant IV LIST OF ACRONYMS ATSDR Agency for Toxic Substances and Disease Registry CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CFR Code of Federal Regulations CIC Community Involvement Coordinator EPA United States Environmental Protection Agency FS Feasibility Study FYR Five-Year Review ICs Institutional Controls EEC Lower Ecorse Creek Dump Site MDEQ Michigan Department of Environmental Quality NCP National Contingency Plan NPL National Priorities List O&M Operation and Maintenance OU Operational Unit RAO Remedial Action Objectives RC Restrictive Covenant RI Remedial Investigation RI/FS Remedial Investigation/Feasibility Study ROD Record of Decision RPM Remedial Project Manager SSC State Superflmd Contract UAO Unilateral Administrative Order UU/UE Unlimited Use/Unrestricted Exposure WCHD Wayne County Health Department Ep:CUTIVE SUMMARY The United States Environmental Protection Agency has completed the third Five-Year Review (FYR) at the Lower ECorse Creek Dump Superfund Site (EEC Site) in the City of Wyandotte, Wayne County, Michigan (City). The purpose of this FYR is to determine whether the remedy is, and will continue to be, protective of human health and the environment. The triggering action for this statutory FYR was the signing of the previous FYR Report on March 21, 2011. The EEC Site is located along the Ecorse River in a 6-block residential area of Wyandotte. In 1989, a resident digging on his property discovered an area of blue-stained soil; EPA later determined the staining was caused by ferric ferrocyanide, which was suspected to be from a former manufactured gas plant. After temporarily covering the blue soil with a clean soil layer in 1989, EPA completed a time-critical removal action from 1993 to 1994 during which it excavated and disposed of the contaminated soil and repaired the foundations of a few homes because they were being damaged by the corrosive nature of the contaminant. EPA placed the EEC Site on the National Priorities List (NPE) in May 1994. EPA completed a remedial investigation (RI) and feasibility study (FS) in 1995 and issued a Record of Decision (ROD) in 1996 to select a site-wide cleanup remedy. The 1996 ROD called for further sampling of locations identified in the RI Report as having contaminant levels above cleanup standards to determine the extent of contamination and for the excavation and off-site disposal of contaminated soil with restoration of areas impacted by excavation. The 1996 ROD indicated that no FYRs would be necessary at the EEC Site because no hazardous substances above levels safe for unlimited use and unrestricted exposure (UU/UE) would be left on-site. In 2000, during a soil cleanup action in a city park (Park), a 6-foot layer of household trash was discovered 3-4 feet below the ground surface. Although it was not the cyanide-contaminated soil found elsewhere, the debris did have lead and arsenic levels slightly above Michigan cleanup standards. Because the debris was only found under Park land, EPA issued a ROD Amendment in 2001 to require the placement of institutional controls (ICs) on the property to permanently restrict land and groundwater use in the Park, environmental morutoring, and maintenance of the existing soil cover. Pursuant to a Unilateral Administrative Order (UAO) issued by EPA in February 2002, Wyandotte recorded a restrictive covenant (RC) with the Wayne County Register of Deeds in April 2002 that restricted uses of the Park to those compatible with the selected remedy. By June 2003, the EEC Site had been cleaned up in accordance with the 1996 ROD and 2001 ROD Amendment, leading EPA to delete the EEC Site from the NPE in July 2005. This FYR Report focuses solely on the Park because it is the only portion of the EEC Site where hazardous substances remain above levels that preclude UU/UE. Upon review, EPA finds that the remedy is protective of human health and environment because all remedial actions are complete and functioning as intended by the decision documents. The City has implemented all measures required by the UAO and the ICs are in place and effective. The soil cover remains in place and prevents exposure to any hazardous substances, pollutants, or contaminants beneath it. Because hazardous substances remain above levels that preclude UU/UE, EPA will conduct the next FYR at the EEC Site within five years of the completion date of this report. VI Five-Year Review Summary Form SITE IDENTIFICATION Site Name: Lower Ecorse Creek Dump Site EPA ID: MID985574227 Region: 5 State: Michigan City/County: Wyandotte, Wayne County NFL Status: Deleted Multiple OUs? Has the site achieved construction completion? No Yes ;OU(s) witb(iut;lssii^s^i^6mmentlafions Identified dii^ EPA identified no issues during the FYR for the Lower Ecorse Creek Dump site. Vll ODl and Site-wide Proteeti^•eness Statement Protectiveness Determination: Protective Protectiveness Statement: The remedy is protective of human health and environment because all remedial actions are complete and functioning as intended by the decision documents. The city has implemented all measures required by the UAO and the ICs are in place and effective. The soil cover remains in place and prevents exposure to any hazardous substances, pollutants, or contaminants beneath it. Vll 1. INTRODUCTION The purpose of an FYR is to evaluate the implementation and performance of a remedy in order to determine if the remedy will continue to be protective of human health and the environment. The methods, findings, and conclusions of reviews are documented in FYR reports. In addition, FYR reports identify issues foimd during the review, if any, and document recommendations to address them. EPA prepares FYR reports pursuant to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Section 121 and the National Contingency Plan (NCP). CERCLA §121 states: If the President selects a remedial action that results in any hazardous substances, pollutants, or contaminants remaining at the site, the President shall review such remedial action no less often than each five years after the initiation of such remedial action to assure that human health and the environment are being protected by the remedial action being implemented. In addition, if upon such review it is the judgment of the President that action is appropriate at such site in accordance with section [104] or [106], the President shall take or require such action. The President shall report to the Congress a list offacilities for which such review is required, the results of all such reviews, and any actions taken as a result of such reviews. EPA interpreted this requirement further in the NCP at 40 Code of Federal Regulations (CFR) Section 300.430(f)(4)(ii), which states: If a remedial action is selected that results in hazardous substances, pollutants, or contaminants remaining at the site above levels that allow for unlimited use and unrestricted exposure, the lead agency shall review such actions no less often than every five years after the initiation of the selected remedial action. EPA conducted a FYR of the remedy implemented at the LEC site in Wyandotte, Wayne County, Michigan. EPA is the lead agency for developing and implementing the remedy for the LEC site. The Michigan Department of Environmental Quality (MDEQ), as the support agency representing the state of Michigan, has reviewed supporting documentation and provided input to EPA during the FYR process. This is the third FYR for the LEC site. The triggering action for this statutory review is the completion date of the previous FYR and is required because hazardous substances, pollutants, or contaminants remain at the site above levels that allow for UU/UE. The LEC site consists of one operable unit (OU), all of which is addressed in this FYR Report. 11. PROGRESS SINCE THE LAST REVIEW Table 1: Protectiveness Determinations/Statements from the 2011 FYR Report Protectiveriess Protectiveness iStiteIiient.•\^v:^••••• ;• Determination The remedy is protective of human health and the environment because all remedial actions are functioning as intended by the decision documents and no evidence of exposure is occurring.