Units RFW-1S 2018 11/1/2018 RFW-1S 2020 3/4/2020 RFW-1S 2021 5/6/2021 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 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <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 1(RFW-2D): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RFW-2D 2018 11/1/2018 RFW-2D 2020 3/4/2020 RFW-2D 2021 5/10/2021 4" 85.40' 6.4' 79' 6.8'-6.4' 96.1 120000 7100 44500 11700 192000 <LOQ <LOQ <LOQ 379 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 673 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 460 4" 85.40' 6.8' 78.6' 7.2'-6.8' 86.8 132000 8470 49600 11400 188000 <LOQ <LOQ <LOQ 430 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 718 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 465 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 4" 85.40' 6.50' 78.9' 6.90'-6.50' <LOQ 112000 6890 41500 9750 186000 <LOQ <LOQ <LOQ 343 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 590 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 456 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 112000 415 <LOQ 18 3.4 120000 390 <LOQ 23 3.7 132000 420 0.005 27 1 1 40 0.2 units mg/L ug/L ug/L 25 450 <LOQ <LOQ 15 480 <LOQ <LOQ 350 530 <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 1(RFW-2D): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RFW-2D 2018 11/1/2018 RFW-2D 2020 3/4/2020 RFW-2D 2021 5/10/2021 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 41500 4.18 <LOQ <LOQ 7.27 44500 7.5 <LOQ <LOQ 7.15 49600 6.15 0.0188 1.57 6.98 Phenolics, Total Recoverable ASP Metal Digestion - Aqueous NH4 Preparation 0.025 mg/L <LOQ complete complete 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 <LOQ 1152 4.97 2 8.91 <LOQ 930 5.46 1.94 4.23 <LOQ 1156 6.9 1.83 142 1,2-dibromo-3-chloropropane 1,2-dibromoethane 2-hexanone Acetone Acetonitrile Acrolein Acrylonitrile Carbon Disulfide Methyl lodide Prep. Method Trans-1,4-dichloro-2-butene Vinyl Acetate 0.5 0.5 5 10 50 5 5 5 5 5 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 <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 1,1,1-trichloroethane 1,1,1,2-tetrachloroethane 1,1,2,2-tetrachloroethane 1,1,2-trichloroethane 1,1-dichloroethane 1,1-dirchloropropane 1,2,3-trichlorobenzene 1,2,3-trichloropropane 1,2,4-trichlorobenzene 1,2,4-trimethylbenzene 1,2-dichlorobenzene 0.5 0.5 0.5 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 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 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.004 Not Detected Complete Complete Complete Complete 2 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 1(RFW-2D): 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 RFW-2D 2018 11/1/2018 RFW-2D 2020 3/4/2020 RFW-2D 2021 5/10/2021 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 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ