46900 0.0725 <LOQ <LOQ 6.79 RR-2S 2021 5/4/2021 64600 <LOQ <LOQ <LOQ 6.79 <LOQ 0.007 Not Detected Complete Complete Complete Complete Complete Complete 2 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR2S): Groundwater Constituent: Sampling Period: Sampling Date: 1,2-dichloroethane 1,2-dichloropropane 1,3,5-trimethylbenzene 1,3-dichlorobenzene 1,3-dichloropropane 1,4-dichlorobenzene 2,2-dichloropropane 2-butanone 2-chlorotoluene 4-chlorotoluene Benzene Bromobenzene Bromochloromethane Bromodichloromethane Bromoform Bromomethane Carbon tetrachloride Chlorobenzene Chloroethane Chloroform Chloromethane cis-1,2-dichloroethane cis-1,3-dichloropropene Dibromochloromethane Dibromomethane Dichlorodifluoromethane Ethylbenzene Hexachlobutadiene Isopropylbenzene Methyl iso-butyl ketone Methyl tert butyl ether Methlene Chloride Naphthalene N-Butylbenzene N-propybenzene O-xylene P & M-xylene P-isopropyltoluene SEC-butylbenzene Styrene DL/LOQ Units 0.5 0.5 0.5 0.5 0.5 0.5 0.5 2 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 2 0.5 0.5 0.5 0.5 0.5 0.5 1 0.5 0.5 0.5 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 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 RR-2S RR-2S 2018 2020 10/30/2018 3/2/2020 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.68 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 5.48 <LOQ <LOQ <LOQ 0.647 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.68 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.61 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.57 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 6.36 <LOQ <LOQ <LOQ 0.739 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 13.3 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.934 <LOQ RR-2S 2021 5/4/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.12 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 4.59 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.53 <LOQ 3 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR2S): Groundwater Constituent: Sampling Period: Sampling Date: Tert-butylbenzene Tetrachloroethene Toluene trans-1,2-dichloroethene trans-1,3-dichloropropene Trichloroethene Trichlorofluoromethane Vinyl chloride DL/LOQ Units 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L RR-2S RR-2S 2018 2020 10/30/2018 3/2/2020 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ RR-2S 2021 5/4/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 4 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR3): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RR-3 RR-3 2018 2020 10/31/2018 3/2/2020 RR-3 2021 5/5/2021 2" 2" 26.88' 26.88' 11.5' 11.2' 15.38' 15.68' 12'-11.5' 11.8'-11.2' <LOQ 54.2 77100 66500 2810 6220 21800 20500 5260 4520 211000 177000 <LOQ 227 <LOQ <LOQ <LOQ 14.2 281 302 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 497 2070 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 417 419 2" 26.88' 11.6' 15.28' 12.2'-11.6' <LOQ 85300 6150 24400 4310 133000 584 <LOQ 14.1 345 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1330 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 447 Diameter (Inches): Well Depth, Tow (ft.): Depth to Water, Tow (ft.) Water Level Elevation (ft.): TOC - TOW (ft.): Boron Calcium Iron Magnesium Potassium Sodium Aluminum Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Nickel Selenium Silver Thallium Vanadium Zinc Alkalinity as Calcium Carbonate 100 1000 50 1000 100 1000 50 20 10 10 10 10 10 10 50 10 10 10 20 20 10 20 80 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 ug/L mg/L BioChemical Oxygen Demand Asp Calcium by ICP-AES Chloride - ASP ASP Total Cyanide Chemical Oxygen Demand 2 1000 5 0.01 5 mg/L ug/L mg/L mg/L mg/L <LOQ 77100 310 0.014 7 <LOQ 66500 270 <LOQ 9 <LOQ 8530 180 0.011 6 1 1 40 0.2 units mg/L ug/L ug/L 35 280 <LOQ <LOQ 5 250 <LOQ <LOQ 5 310 <LOQ <LOQ Color, Apparent ASP Hardness as Calcium Carbonate Hexavalent Chromium, ASP ASP Mercury 1 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR3): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RR-3 RR-3 2018 2020 10/31/2018 3/2/2020 ASP Magnesium Ammonia as N Nitrite Nitrogen as N N-Nitrate Calculated Corrosivity/pH 1000 0.05 0.01 0.05 0.1 ug/L mg/L mg/L mg/L units Phenolics, Total Recoverable ASP Metal Digestion - Aqueous NH4 Preparation 0.025 mg/L Sulfate, Aqueous Total Dissolved Solids Total Kjeldahl nitrogen as N-ASP Total Organic Carbon Turbidity 1 mg/L 2 mg/L 0.5 mg/L 0.1 mg/L as C 0.02 NTU 19.8 878 0.256 0.812 22.1 32.3 852 0.255 0.933 34.8 48.4 744 0.417 1.22 28.8 1,2-dibromo-3-chloropropane 1,2-dibromoethane 2-hexanone Acetone Acetonitrile