hnd appropriate requirements that will not be met. This remedy ukilizes permanent solutions and alternative treatment or resource recpvery technologies, to the maximum extent practicable. However, beFaUSe treatment of the principal threats of the site was not found to be practicable, this remedy does not satisfy the preference for treatment as a pribcipal element. Because this remedy will not allow for unlimited use and unrestricted exposure to wastes, within five years after completion of rembdial action, a five year review will be conducted. This evaluation will be /conducted within five years after the completion of remedial action to iensure that the remedy continues to provide adequate protection of human healph and the environment. - DeDutv Commissioner of?ic; of Environmental Rembdiation New York State Department or Environmental Conservation TABLE OF COmmNz'S I. ................................ Site History .................................................. Site Location and Description 11. 111. ...................................... A. Summary of Field Investigations........................... B. Summary of Site Conditions............. ................... Current Site Status..... C. Summary of Site Risks.........,........................... IV. Enforcement Status............................ v. Goals for the Remedial Actions........... VI . ............... .................... Summary of the Evaluation of Remedial Alternatives .......... A. Description of Alternatives............................... B. Evaluation of Alternatives...... ......................... ....................... VIII. Selected Remedy .............................................. VII. Highlights of Cnnnunity Participation. IX. Documentation of Significant Changes .......................... 13 Tiaures Site Vicinity Map General Site Mau Select Sampling-Station Location Map Typical Cap Cross Section and Gas Well Detail Tables. Non-Cost Comparison of Feasible Remedial Alternatives Cost Comparison of Feasible Remedial Alternatives Standards, Criteria, and Guidance (Sffis)for the Remedial Action exhibit^ Administrative Record Project Chronology Excemt from the NYS:Reaistrv of Inactive Hazardous Waste Sites ~esponsivenessSummary - - RECORD OF DECISION CROTON POINT SANITARY LANDFIU SITE SITE f360001 I. SITE LOCATION AND DESCRIPTION The former Croton Point Sanitary landfill site is located in the Village of Croton-On-Hudson, Town of Cortlandt, Westchester Couqty. The peninsula extends into the Hudson river for an estimated 2 n/iles and separates Haverstraw Bay from Croton Bay. The Point has a totalarea of approximately 500 acres. The landfill complex occupies approxilately 142 acres on the Croton Point peninsula. The remainder of the Point, has been developed as a County Park, and.includea sports fields and day use areas as well as several options for overnight accommodations. The Park slurrounds the landfill area on all sides except the eastern perimeter which ab(uta the Croton Marsh. The site is located adjacent to and south of Metro North Croton Harmon maintenance center. Figure 1 shows the location olf the site with respect to the local area and figure 2 presents the landfill boundary. The selected remedy will include the "Original Fill area" ahd the "Ballfield Cell" of the landfill complex. The third landfill unlit, "Railroad I" has already complied with closure requirements in place at the time it closed in the early 1980's. The 96 acre Original cell abd the 18.5 acre Ballfield cell share a common boundary and will be closed ubder this program. 11. SITE HISTORY - The CPSL operated from circa 1927 through 1986 and receivedboth municipal and industrial wastes during that timeframe. The land ill served as the primary disposal location for most of County of Westcheat r for over 40 years and contains an estimated 11,000,000 cubic yards of bur ed wastes. The landfill was owned and operated by Weetchester County throug out its existence. Accurate accounting data or records of past disposa~activities prior to the 1970's do not exist. Available information indicat s that the site received some quantities of the following wastes: mixtures f flammable liquids, organic solvents, and acids. The exact locations of thpse items were not recorded by the site operators at the time of disposal. Subsequent investigations failed to locate hot spots and indicates these materials were not segregated from the municipal wastes but buried together. i t The landfill has been the subject of a multitude of investi$ations and studies beginning in the early 1970's when the County was sued fqr disposing of wastes in the navigable waters of the United States. This filfst action ' led to a series of engineering and scientific endeavors aimed at determining the landfill's impact on the Croton Marsh, the Hudson River, locdl residents and site workers. These reports and studies have yielded a significant data base upon which to develop a final investigative program for the CPSL. One of the later reports concerning the site impacts, prepared for the USEPA in 1986, was utilized by the NYSDEC to classify the landfill as a cjass 2 inactive hazardous waste site under New York State law. A list 0% the previous investigations and study efforts is included in Exhibit A of this Record of Decision (ROD). The County is currently obligated to perform a complete remddial Program in accordance with federal and State legislation as Consent Order executed in Hay of 1989 with the NYSDEC. The continues