Custody, Handling, Packing, and Shipping; • Equipment Cleaning; and • Handling and Storage of Investigation-Derived Waste

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Custody, Handling, Packing, and Shipping; • Equipment Cleaning; and • Handling and Storage of Investigation-Derived Waste Table of Contents Section 1. Introduction ...............................................................................................................1-1 1.1 Area A Description........................................................................................................... 1-1 1.2 Area A History and Background ...................................................................................... 1-1 1.2.1 Area A History..................................................................................................... 1-2 1.2.2 Previous Investigations and Remedial Activities................................................ 1-2 1.3 Pre-Design Investigation Objectives................................................................................ 1-3 1.4 Work Plan Organization................................................................................................... 1-4 Section 2. Area A Pre-Design Investigation Activities.............................................................2-1 2.1 Horizontal and Vertical Delineation of the Former Tar Tank Remediation Area ............. 2-1 2.2 Horizontal and Vertical Delineation of the Former Relief Holder Remediation Area....... 2-2 2.3 Geotechnical Investigation .............................................................................................. 2-3 2.4 Hydraulic Characterization .............................................................................................. 2-3 2.5 Waste Disposal Characterization Sampling .................................................................... 2-4 2.6 Evaluation of Utility Relocation Corridor.......................................................................... 2-4 Section 3. Quality Assurance/Quality Control..........................................................................3-1 3.1 Project Organization ........................................................................................................ 3-1 3.2 Analytical Procedures and Laboratories.......................................................................... 3-1 3.3 Standard Operating Procedures...................................................................................... 3-2 3.4 Training Requirements/Certifications .............................................................................. 3-2 3.5 Field Instrument Calibration and Maintenance................................................................ 3-2 3.6 Field Documentation........................................................................................................ 3-3 Section 4. Data Reporting and Schedule ..................................................................................4-1 4.1 Preliminary Schedule....................................................................................................... 4-1 4.2 Data Reporting................................................................................................................. 4-1 Section 5. References .................................................................................................................5-1 Figures 1 Site Location Map 2 Site Plan 3 Proposed Investigation Activities and Sampling Locations, Area A Appendices A Standard Operating Procedures B Health and Safety Plan BLASLAND, BOUCK & LEE, INC. 4/26/06 engineers, scientists, economists 1 G:\CCAGLE\2006\05462929.doc 1. Introduction This Pre-Design Investigation (PDI) Work Plan has been prepared by Blasland, Bouck & Lee, Inc. (BBL) on behalf of Central Hudson Gas & Electric Corporation (CHGE) 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 the site of CHGE’s former manufactured gas plant (MGP) in Newburgh, New York or in other areas where constituents from the Newburgh former MGP may have migrated (the Site). A Site Location Map is provided as Figure 1. A remedial investigation (RI) and feasibility study (FS) 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 the 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 evaluation of remedial alternatives. Area A is the former MGP itself; Area B is the area between the former MGP and the Hudson River currently occupied by the City of Newburgh sewage treatment plant (STP); and Area C is the Hudson River off-shore from the former MGP. A Site Map is provided as Figure 2. As previously discussed with NYSDEC, it is CHGE’s intention to complete the remedial design and construction activities in Area A in 2006. Because the investigation and monitoring tasks that will be performed for Areas B and C are more complex and of a longer duration, this PDI Work Plan presents only the scope of work for pre-design investigation activities that will be conducted in Area A. Pre-design activities in Areas B and C will be detailed in a subsequent work plan to be prepared and submitted to NYSDEC. 1.1 Area A Description Area A is the portion of the Site where the former MGP was located. It is bordered to the north by South William Street, to the east by South Water Street, to the south by Renwick Street, and to the west by South Colden Street. The former MGP is approximately 1.8 acres in size and is enclosed by a chain link fence. Currently, CHGE operates a natural gas regulator station and a propane peaking plant at the Site. Features associated with these operations include a control building, five regulator stations and associated natural gas lines, a vaporizer, six 60,000-gallon propane tanks, and roads/paved access areas. 1.2 Area A History and Background This section provides a brief summary of the history and previous investigation activities conducted at the Former MGP (Area A). A thorough evaluation of the Site history and details pertaining to previous investigations and remedial actions has been presented in previous reports submitted to the NYSDEC, including the Remedial Investigation Report (RI Report) (BBL, 1999) and the Feasibility Study Report (FS Report) (BBL, 2003). BLASLAND, BOUCK & LEE, INC. 4/26/06 engineers, scientists, economists 1-1 G:\CCAGLE\2006\05462929.doc 1.2.1 Area A History The MGP was built in 1876. Between 1878 and 1911, the MGP was owned and operated by various companies, including the Consumer Gas Company of Newburgh, New York, the Newburgh Gaslight Company, and the Newburgh Light, Heat & Power Company. In 1911, the Newburgh Light, Heat & Power Company became the Central Hudson Gas & Electric Company. In 1926, Central Hudson Gas & Electric Company consolidated with other utilities to form CHGE. The Newburgh MGP produced gas by the water gas method and by the carbureted water gas method. From 1931 to 1948, the MGP was used as a gas storage and distribution center and for reserve gas production. In 1951, CHGE demolished the MGP, which included the decommissioning of above-grade buildings, gas holders, and oil tanks. Since demolition of the former MGP, CHGE has operated a natural gas regulator station and natural gas transmission interconnect at the former MGP site. In 1985, CHGE constructed a propane peaking plant in the southern portion of the former MGP site. 1.2.2 Previous Investigations and Remedial Activities A Phase I Investigation was conducted at the former MGP by EA Science and Technology in 1987. The Phase I Investigation included a compilation of site information from CHGE files and publicly available resources, a site reconnaissance, a soil vapor survey, and the calculation of a preliminary Hazard Ranking System (HRS) score. This investigation provided a historical overview of the former MGP site as well as some general information on the physical setting of the site. The results of the Phase I Investigation were presented in the Phase I Investigation, Newburgh Coal Gasification Plant Site (EA Science and Technology, 1987). A Phase II Investigation was conducted at the former MGP site in 1988 by Blasland & Bouck Engineers, P.C. The Phase II Investigation included the installation of soil borings and monitoring wells and the subsequent sampling and analysis of subsurface soil samples, surface soil samples, and groundwater samples. The results of this investigation are presented in the Phase II Investigation Report for the Former Coal Gasification Plant Site (Blasland & Bouck Engineers, P.C., 1989). A subsequent round of groundwater samples was collected for laboratory analysis from the Phase II monitoring wells in 1994. Based on the results of the Phase I and Phase II investigation activities, a comprehensive RI was conducted. Initial RI activities were completed in 1996. Supplemental RI activities were performed in 1997, 1998, and 1999. The RI activities included a project area survey, source investigation, geologic investigation, hydrogeologic investigation, drain investigation, Hudson River investigation, air quality investigation, and ecological investigation. These investigations were conducted in general accordance with the following documents: • Remedial Investigation Newburgh Project Work Plan (RI Work Plan) (BBL, 1996); • Sampling and Analysis Plan (BBL, 1996); • Health
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