Areas B and C Pre-Design Investigation Work Plan
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W ORK P LAN Areas B and C Pre-Design Investigation Work Plan Central Hudson Gas & Electric Corporation Newburgh, New York August 2006 Table of Contents Section 1. Introduction ...............................................................................................................1-1 1.1 History and Background .................................................................................................. 1-1 1.1.1 History of Areas B and C.................................................................................... 1-1 1.1.2 Pre RI/FS Investigations and Remedial Activities .............................................. 1-2 1.1.3 Remedial Investigation/Feasibility Study............................................................ 1-3 1.1.3.1 Remedial Investigation Activities ........................................................ 1-3 1.1.3.2 Feasibility Study.................................................................................. 1-3 1.1.4 Record of Decision ............................................................................................. 1-4 1.2 PDI Objectives................................................................................................................. 1-5 1.3 Work Plan Organization................................................................................................... 1-5 Section 2. Area B PDI Activities.................................................................................................2-1 2.1 Delineation of NAPL-Impacted Soil ................................................................................. 2-2 2.2 Geotechnical Investigation .............................................................................................. 2-2 2.3 Waste Characterization ................................................................................................... 2-3 2.4 Hydraulic Characterization .............................................................................................. 2-3 2.5 Survey.............................................................................................................................. 2-4 Section 3. Area C PDI Activities.................................................................................................3-1 3.1 Horizontal and Vertical Delineation of NAPL-Impacted Sediments................................. 3-2 3.2 Horizontal Delineation of PAH-Impacted Sediments....................................................... 3-2 3.2.1 Overall Approach to Capping Area Delineation.................................................. 3-2 3.2.2 Sample Locations ............................................................................................... 3-4 3.2.3 Sample Collection and Analysis ......................................................................... 3-4 3.3 Waste Characterization ................................................................................................... 3-5 3.4 Geotechnical Evaluation.................................................................................................. 3-5 3.5 Bathymetric Survey ......................................................................................................... 3-6 3.6 Hydrodynamic Modeling .................................................................................................. 3-6 Section 4. Quality Assurance/Quality Control..........................................................................4-1 4.1 Project Organization ........................................................................................................ 4-1 4.2 Analytical Procedures and Laboratories.......................................................................... 4-2 4.3 Standard Operating Procedures...................................................................................... 4-2 4.4 Training Requirements/Certifications .............................................................................. 4-3 4.5 Field Instrument Calibration and Maintenance................................................................ 4-3 4.6 Field Documentation........................................................................................................ 4-3 Section 5. Data Reporting and Schedule ..................................................................................5-1 5.1 Data Reporting................................................................................................................. 5-1 5.2 Preliminary Schedule....................................................................................................... 5-1 Section 6. References .................................................................................................................6-1 BLASLAND, BOUCK & LEE, INC. 8/10/06 an ARCADIS company 1 P:\JLC\2006\23360146_work plan.doc Tables 2-1 Waste Characterization Laboratory Analytical Methods 4-1 Areas B and C Pre-Design Investigations – Summary of Field and QA/QC Sampling/Analysis Figures 1 Site Location Map 2 Site Plan 3 Area B Pre-Design Investigation Locations 4 Area C Pre-Design Investigation Locations – NAPL-Impacted Sediment Delineation and Geotechnical Evaluation 5 Area C Pre-Design Investigation Locations – PAH-Impacted Sediment Delineation Appendices A Standard Operating Procedures B Sediment Sample Collection and Analysis Work Plan for Evaluating PAH Bioavailability (RETEC, 2006). BLASLAND, BOUCK & LEE, INC. 8/10/06 an ARCADIS company 2 P:\JLC\2006\23360146_work plan.doc 1. Introduction On behalf of Central Hudson Gas & Electric Corporation (CHGE), BBL, an ARCADIS Company (BBL), has prepared this Pre-Design Investigation (PDI) Work Plan in accordance with an Order on Consent (Order) between the New York State Department of Environmental Conservation (NYSDEC) and CHGE (Index #D3- 0001-95-06) dated October 1995. Under the Order, CHGE is required to investigate and, if necessary, remediate hazardous substances located at CHGE’s former manufactured gas plant (MGP) in Newburgh, New York and in other areas where constituents from the former MGP may have migrated (the site). A site location map is provided on Figure 1. Remedial investigation and feasibility study (RI/FS) activities were conducted at the site from 1996 to 2003. The objectives of the RI/FS were to characterize the nature and extent of impacts associated with the former MGP and to screen, evaluate, and select remedial alternatives to address those impacts. During the RI/FS process, the site was divided into three distinct areas primarily due to the varied land uses and physical characteristics of each of the three areas. This was also done for ease of evaluating remedial alternatives. Area A is the former MGP itself; Area B is the area between the former MGP and the Hudson River currently primarily occupied by the City of Newburgh sewage treatment plant (STP); and Area C is the Hudson River offshore from the former MGP and STP. These areas are shown on Figures 1 and 2. A PDI Work Plan for Area A (BBL, 2006) was submitted to the NYSDEC in April 2006, and PDI activities in Area A were implemented in May and June 2006. This PDI Work Plan presents the scope of work for PDI activities that will be conducted in Areas B and C. 1.1 History and Background This section provides a brief summary of the history of Areas B and C and a summary of the previous investigations and remedial actions performed in Areas B and C. A thorough evaluation of the site history and details pertaining to previous investigations and remedial actions can be found in the Newburgh Project Remedial Investigation Report (RI Report; BBL, 1999) and the Revised Feasibility Study Report Newburgh Project (FS Report; BBL, 2003). 1.1.1 History of Areas B and C Between 1835 and 1926, the STP property and portions thereof were used for various industrial operations, including: • Sawmills; • Shipyards; • Lumber dealers; • Manufacturers of engines, boilers, and general machinery; • Shipbuilders; and • Railroad depots, freight yards, and repair shops. In 1926, the City of Newburgh purchased the northernmost portion of the current STP property from the West Shore Railroad and New York Central Railroad Company. In 1963, the City of Newburgh built an incinerator BLASLAND, BOUCK & LEE, INC. 8/10/06 an ARCADIS company 1-1 P:\JLC\2006\23360146_work plan.doc on the northernmost portion of the property; the incinerator was in operation until approximately 1976. The remaining two parcels of the current STP property were purchased by the City of Newburgh in 1963 and 1967. The railroad facilities at the property were abandoned in 1968 prior to construction of the existing STP in the late 1960s. The shoreline/dockline of the Hudson River adjacent to the STP property has changed several times since 1865, as documented in the RI Report. 1.1.2 Pre RI/FS Investigations and Remedial Activities This section provides an overview of investigation and remediation activities conducted in Area B prior to (or outside the scope of) the RI/FS process (no investigation/remediation activities were conducted in Area C prior to or outside the scope of the RI/FS). Four geotechnical and three environmental investigations have been conducted at the STP. The geotechnical investigations were conducted in 1963, 1967, 1993, and 1994 in preparation for the original construction and planned expansion of the sewage treatment facilities. An investigation was conducted in 1994 by First Environment for the City of Newburgh. In 1995 and 1996, investigations were conducted by BBL in accordance with