388 BRIDGE STREET BROOKLYN, NEW YORK Remedial Action Work Plan NYSDEC BCP Number: C224134 Prepared For: 384 Bridge Street LLC c/o Stahl Real Estate Company Inc. 277 Park Ave New York, NY 10172 and R, K & G Associates, LLC 580 Sylvan Avenue Englewood Cliffs, NJ 07632 Submitted to: New York State Department of Environmental Conservation Division of Environmental Remediation 625 Broadway, 12th Floor Albany, N.Y. 12231-7016 Prepared by: Arnold F. Fleming, P.E. & Fleming Lee Shue, Inc. Environmental Management & Consulting 158 West 29th Street, 9th Floor New York, NY 10001 (212) 675-3225 APRIL 2012 388 Bridge Street Remedial Action Work Plan April 2012 REMEDIAL ACTION WORK PLAN TABLE OF CONTENTS CERTIFICATIONS ......................................................................................................................... i TABLE OF CONTENTS................................................................................................................ ii LIST OF ACRONYMS ............................................................................................................... viii EXECUTIVE SUMMARY ............................................................................................................ 1 Site Description/Physical Setting/Site History............................................................................1 Summary of the ON-SITE Remedial Investigation ....................................................................1 Qualitative Human Health Exposure Assessment.......................................................................3 Summary of the Remedial actions...............................................................................................3 REMEDIAL ACTION WORK PLAN ........................................................................................... 5 1.0 INTRODUCTION .............................................................................................................. 5 1.1 Site Location and Description............................................................................................. 5 1.2 Contemplated Site Redevelopment Plan............................................................................. 6 1.3 Description of Surrounding Property – Off-Site Area........................................................ 6 2.0 DESCRIPTION OF REMEDIAL INVESTIGATION FINDINGS ................................... 7 2.1 Site History ......................................................................................................................... 7 2.2 Geological Conditions ........................................................................................................ 7 2.2.1 Geology....................................................................................................................... 7 2.2.2 Hydrogeology ............................................................................................................. 8 2.3 Summary Remedial Investigations Performed ................................................................... 9 2.3.1 Borings and Wells....................................................................................................... 9 2.4 Previous Investigations ....................................................................................................... 9 2.4.1 EMTEQUE Phase I Environmental Site Assessments and Phase II Environmental Site Investigations ............................................................................................................................ 11 2.4.2 Meuser Rutledge 2007 Geotechnical Investigation ..................................................... 12 2.4.3 FLS 2008 Additional Remedial Investigation ............................................................ 12 2.4.4 FLS December 2008 Lot 118 Investigation................................................................ 13 2.4.5 FLS Interview with Previous Site Lessee, 2009 ......................................................... 14 2.4.6 2009 Supplemental Remedial Investigation (SRI) ....................................................... 14 2.4.7 FLS 2010 Pre-Design Remedial Investigation (PRI).................................................... 16 2.4.8 FLS 2008-2010 Investigation of Saint Joseph High School......................................... 17 3.0 CONTAMINATION CONDITIONS ............................................................................... 19 3.1 Conceptual Model of Site Contamination......................................................................... 19 3.2 Identification of Standards, Criteria and Guidance........................................................... 20 3.3 Soil/Fill Contamination..................................................................................................... 20 3.3.1 Summary of Soil/Fill Data........................................................................................ 20 3.3.2 Comparison of Soil/Fill with SCGs .............................................................................. 21 3.4 On-Site and Off-Site Groundwater Contamination .......................................................... 22 3.4.1 Summary of Groundwater Data.................................................................................... 22 3.4.2 Comparison of Groundwater with SCGs ...................................................................... 22 3.5 On-Site and Off-Site Soil Vapor Contamination.............................................................. 22 ii 388 Bridge Street Remedial Action Work Plan April 2012 4.0 ENVIRONMENTAL AND PUBLIC HEALTH ASSESSMENTS ................................. 24 4.1 Qualitative Human Health Exposure Assessment ............................................................ 24 4.2 Remedial Action Objectives ............................................................................................. 25 4.2.1 Soil ............................................................................................................................ 25 4.2.2 Groundwater ............................................................................................................. 25 4.2.3 Soil Vapor ................................................................................................................. 26 5.0 DESCRIPTION OF REMEDIAL ACTION PLAN ......................................................... 27 5.1 Evaluation of Remedial Measures .................................................................................... 27 5.1.1 Soil ............................................................................................................................ 27 5.1.2 Soil Gas (On-Site)..................................................................................................... 28 5.1.3 Soil Gas (Off-Site) ....................................................................................................... 28 5.1.4 Groundwater ............................................................................................................. 29 5.2 Remedial Action Standards, Criteria and Guidance (SCGs) ........................................ 31 5.3 Selection of the Preferred Remedial Actions................................................................ 31 6.0 REMEDIAL ACTION PROGRAM................................................................................. 33 6.1 Governing Documents .................................................................................................. 33 6.1.1 Site Specific Health and Safety Plan ........................................................................ 33 6.1.2 Quality Assurance Project Plan ................................................................................ 33 6.1.3 Soil/Materials Management Plan.............................................................................. 33 6.1.4 Community Air Monitoring Plan.............................................................................. 33 6.2 General Remedial Construction Information................................................................ 33 6.2.1 Project Organization ................................................................................................. 33 6.2.2 Remedial Engineer.................................................................................................... 33 6.2.3 Remedial Action Construction Schedule.................................................................. 34 6.3 Reporting....................................................................................................................... 34 6.3.1 Weekly Reports......................................................................................................... 34 6.3.2 Monthly Reports ....................................................................................................... 35 6.3.3 Other Reporting ........................................................................................................ 35 6.3.5 Deviations from the Remedial Action Work Plan .................................................... 36 7.0 REMEDIAL ACTION: MATERIAL REMOVAL FROM SITE .................................... 37 7.1 Remedial Performance Evaluation (Post Excavation End-Point Sampling) ................ 37 7.1.1 End-Point Sampling Frequency .................................................................................38 7.2 Estimated Material Removal Quantities ....................................................................... 38 7.2.1 Materials Transport Off-Site......................................................................................38