Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 2(SRF-3B): Surface Water SRF-3B: Marsh Left 2021 Not Detected Complete Complete 220 3156 1.15 0.772 72.5 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 6 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 2(SRF-3B): Surface Water SRF-3B: Marsh Left 2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 7 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 2(SRF-3B): Surface Water SRF-3B: Marsh Left 2021 <LOQ <LOQ <LOQ 8 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 3: Sediment Constituent Sampling Period: Silver SW by MS Arsenic SW by MS Cadmium SW by ICP-MS Copper SW by MS Iron by ICP-AES Lead SW by ICP-MS Metals Digestion for soil/solids/sludges ASP Precent Solids Constituent Sampling Period: Silver SW by MS Arsenic SW by MS Cadmium SW by ICP-MS Copper SW by MS Iron by ICP-AES Lead SW by ICP-MS Metals Digestion for soil/solids/sludges ASP Precent Solids Constituent Sampling Period: Silver SW by MS Arsenic SW by MS Cadmium SW by ICP-MS Copper SW by MS Iron by ICP-AES Lead SW by ICP-MS Metals Digestion for soil/solids/sludges ASP Precent Solids DL/LOQ Units 13.1 6.6 6.6 33 13.1 6.6 mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt <LOQ 5.6 <LOQ 92.4 32400 87.8 Completed % 31.7 0.1 DL/LOQ Units 13.1 6.6 6.6 33 13.1 6.6 mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt DL/LOQ Units 0.1 mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt mg/Kg dry wt <LOQ 3.5 <LOQ 30.7 18100 23.5 Completed 54 Soil B Soil B Soil B 2018 2020 2021 <LOQ 10.1 <LOQ 121 38300 141 completed % 24.6 0.1 13.1 6.6 6.6 33 13.1 6.6 Soil A Soil A Soil A 2018 2020 2021 <LOQ 3 <LOQ 15.2 9780 13.6 completed 68.9 Soil C Soil C Soil C 2018 2020 2021 <LOQ 13.6 <LOQ 14.1 34000 12.9 completed % 35.5 <LOQ 2.3 <LOQ 20 13700 18.7 completed 68.5 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 4a: Leachate (Pump Station) County Daily Wastewater Constituent: DL/LOQ Units Limits (Avg.) Pump Station #2 Pump Station #2 Pump Station #2 Sampling Period: 2018 2020 2021 Aluminum 50 ug/L 145 70.1 595 Antimony 20 ug/L <LOQ <LOQ <LOQ Arsenic 10 ug/L 200 <LOQ <LOQ <LOQ Barium 1 ug/L 2000 117 122 263 Beryllium 10 ug/L <LOQ <LOQ <LOQ Cadmium 10 ug/L 700 <LOQ <LOQ <LOQ Chromium 10 ug/L 3000 (total) <LOQ <LOQ 10.3 Cobalt 10 ug/L <LOQ <LOQ <LOQ Copper 50 ug/L 2800 139 249 318 Lead 10 ug/L 400 <LOQ <LOQ 12.7 Magnaese 10 ug/L 335 348 766 Nickel 10 ug/L 2800 <LOQ <LOQ 11.8 Selenium 20 ug/L 200 <LOQ <LOQ <LOQ Silver 20 ug/L 800 <LOQ <LOQ <LOQ Thallium 10 ug/L <LOQ <LOQ <LOQ Vanadium 20 ug/L <LOQ <LOQ <LOQ Zinc 80 ug/L 1800 <LOQ 97.4 381 Biochemical Oxygen Demand 2 mg/L 50.7 81.6 55 ASP Total Cyanide Hexavalent Chromium, ASP ASP Mercury 0.01 mg/L 40 ug/L 0.2 ug/L Corrosivity/pH 0.1 Units Phenolics, Total Recoverable ASP Metal Digestion-Aqueous Total Kjeldahl Nitrogen as N-ASP Total Suspended Solids 0.8 2000 200 5.5 (low)9.5 (high) 0.03 <LOQ <LOQ 0.056 <LOQ <LOQ 0.026 <LOQ <LOQ 7.67 7.51 7.78 0.025 mg/L 0.07 Complete 0.045 Complete 2 mg/L 120 0.172 Complete 71.8 28 88 1 Constituent: Sampling Period: Total Toxic Organics Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 4a: Leachate (Pump Station) County Daily Wastewater DL/LOQ Units Limits (Avg.) Pump Station #2 Pump Station #2 Pump Station #2 2018 2020 2021 mg/L 2.1 0.03585 0.063917 0.010453 4,4-DDD 4,4-DDE 4,4-DDT a-BHC a-Chlordane Aldrin b-BHC Chlordane d-BHC Dieldrin Endosulfan 1 Endosulfan 2 Endosulfan sulfate Endrin Endrin aldehyde Endrin ketone g-Chlordane Heptachlor Heptachlor epoxide Lindane Methoxychlor Toxaphene 0.1 0.1 0.1 0.05 0.05 0.05 0.05 0.1 0.05 0.1 0.05 0.1 0.1 0.1 0.1 0.1 0.05 0.05 0.05 0.05 0.1 5 ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ