The wetlands vegetative work was designed to duplicat previous transects established by Buckley, et al. in the early 1970 s. Aerial infraThe results red spectrometry was used as an additional assessment tool showed that although the marsh has transitioned from catta 1 dominated to phragmites dominated, that the biomass has recovered from revious recorded lows and that this increased biomass is contrary to predic ed declines by 1989 (Buckley, 1982). The habitat assessment work reveale that the Croton Marsh is habitat for a wide variety of wildlife including wo species of special concern (sedge wrens and least bitterns). A total of seven plant species observed in the Croton Marsh appear on the NY rareplant status list or the NY watch list. i Ambient air and landfill gases (point & nonpoint that a significant amount of methane is soil gas samples. No vinyl C. SUMMARY OF SITE RISKS A health risk assessment was accomplished utilizing tde present-use exposure conditions for recreational adults, youths, and c ildren, adult workers, and residential adults on the hazardous waste sit and for areas immediately adjacent to the landfill. The details of this assessment can be found in Chapter 6 of the RI reports and are briefly summa ized here. Exposures to adjacent surface waters (ingestion and contac ), fugitive duets (inhalation), onsite soils (ingestion & contact), fish tiss es (ingestion) and ambient air (inhalation) were evaluated. Dermal exposu e to on-site soils (the area within the fenced landfill) present carcino enic and noncarcinogenic health risks to adult workers on-site. On-sit soils would also present these health risks to adults and children if i were developed for residential and recreational property in its uncapped c 1 consumption of fish caught from the Lower Hudson River, includipg in the area of the Croton Point Landfill, present carcinogenic and non-carcinogenic risks. Fish throughout the Lower Hudson River have been shown 'to contain elevated PCB levels. Sources upriver have been identified. In response to this contamination, the New York State Department of Health has issued advisories on the consumption of fish and Blue Claw Crabs caught from the Lower Hudson River. Elevated levels of contaminants in Croton by the landfill:' .In the eastern drainage channel, inorganic s exist at concentrations that are known to seriously effect The invertebrate benthic conmunity in the eastern channel less diverse than the communities of the other background marsh. In addition to impacts to the marsh aquatic community, imp cts may be occurring to birds associated with the marsh. The risk assessm nt found a potential toxic impact to a representative fish-consuming bird, the kingfisher. .In addition, impacts to birds that directly consum6 benthic invertebrates are possible. $ Croton Marsh has undergone a decrease in plant species diversity which makes it less suitable as habitat for wildlife. This change indiversity may be a result, at least in part, to the influence of contaminants originating from the landfill. IV. ENFORCEMENT STATUS Orders on Consent AOency NYSDEC USDOJ USDOJ Date 17 April 1989 4 February 1975 8 December 1987 Index No. W3-0082-8707 n/a n/a Subiect : Remedial Progqam The NYSDEC and the County of Westchester began negotiation? toward a Consent Order to govern the remedial program at Croton Point in 1987 shortly after the County reached their most recent agreement with the ~eheral Government. These discussions resulted in an 17 April 1989. The Order states that pursuant to the Conservation Law, Section 27-1313, the hazardous waste remedial Fund is being used to reimburse the County for up to 75 percent (759) of the costs for the remedial program. The Order also acknowledges that the bounty was acting on behalf of all the municipalities within the County in activities at the landfill. Currently there have been no concerning funding from other potentially responsible actions to recover costs from potentially applicable ineurance ceverages ' been initiated. -+- The County also has obligations to the United States Cover ent through the existing Final Judgement and Stipulation and and Order in V ted t tes of America v. Edwin G. Michaeliaq. It is beyond the scope of thi ROD to address these obligations. V. OOALS FOR THE REMEDIAL ACTIONS The remedial alternative selected for the site by the Depar+ment was developed in accordance with the New York State Environmental Co+servation Law (ECL) and 6 NYCRR Part 375, NYS Inactive Hazardous Waste Sit Remedial Program. The ROD is consistent with the Comprehensive Environme tal Response, Compensation, and Liability Act of 1980 (CERCLA), 42 U C Section 9601, et., seq., as amended by the Superfund Amendments and Reau horization Act Of 1986 (SARA). The criteria which were used in evaluating tihe Potential remedial alternatives can be summarized as follows: i C o m ~ l l a n c rwith ADcd+caJle or Relevant and AD~rooriateNew York State Standarda.~ (SCGs)--SCCs are divided into