<LOQ <LOQ 9.71 <LOQ <LOQ <LOQ 1.63 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.769 <LOQ 3.09 <LOQ 0.578 <LOQ <LOQ <LOQ <LOQ <LOQ 1.74 <LOQ RR-2D 2021 5/4/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 2.22 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 8.45 <LOQ <LOQ <LOQ 1.24 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.511 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.22 <LOQ 3 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR2D): 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-2D RR-2D 2018 2020 10/30/2018 3/2/2020 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.9 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.862 RR-2D 2021 5/4/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.632 4 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: DL/LOQ Units RR-2S RR-2S 2018 2020 10/30/2018 3/2/2020 RR-2S 2021 5/4/2021 2" 29.20' 10.15' 19.05' 10.6'-10.15' 136 149000 15800 64600 7210 47600 8770 <LOQ <LOQ 498 <LOQ <LOQ 17.4 47 552 <LOQ 3990 105 <LOQ <LOQ <LOQ 37.9 75.9 >500 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 2" 2" 29.20' 29.20' 10.09' 10.4' 19.11' 18.8' 11.10'-10.09' 10.7'-10.4' ug/L 148 144 ug/L 125000 112000 ug/L 1330 3210 ug/L 53600 46900 ug/L 5410 5030 ug/L 51200 41100 ug/L 872 1790 ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L 300 275 ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L 39.8 30 ug/L 71.6 136 ug/L <LOQ <LOQ ug/L 2830 2610 ug/L 104 73.4 ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L <LOQ <LOQ ug/L <LOQ <LOQ mg/L >500 >500 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 125000 77 <LOQ 114 3.57 112000 85 0.012 97 2.8 149000 105 0.005 75 1 1 40 0.2 units mg/L ug/L ug/L 20 530 <LOQ <LOQ 10 470 <LOQ <LOQ 50 640 <LOQ 0.275 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 (RR2S): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RR-2S RR-2S 2018 2020 10/30/2018 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 45.7 854.7 0.644 37.3 18.5 58.7 802.7 0.708 31.6 45.6 57 876 0.492 32.1 397 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 4.64 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 6.55 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 4.55 53600 0.0752 <LOQ <LOQ 6.87 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