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 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.36 <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 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 3 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 1(RFW-7D): 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 RFW-7D 2018 11/8/2018 RFW-7D 2020 3/9/2020 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 4 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 1(RFW-7D): Groundwater RFW-7D 2021 5/12/2021 4" 46.70' 8.5' 38.2' 8.9'-8.5' <LOQ 36400 <LOQ 13100 2560 8450 <LOQ <LOQ <LOQ 51.4 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 172 <LOQ 36400 <LOQ <LOQ <LOQ <LOQ 140 <LOQ <LOQ 5 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 1(RFW-7D): Groundwater RFW-7D 2021 5/12/2021 13100 0.0598 <LOQ <LOQ 8.11 0.006 Complete Complete 6.5 270 0.167 1.14 0.17 <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 1(RFW-7D): Groundwater RFW-7D 2021 5/12/2021 <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 1(RFW-7D): Groundwater RFW-7D 2021 5/12/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 8 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 1(RFW-7S): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RFW-7S 2018 11/8/2018 RFW-7S 2020 3/9/2020 RFW-7S 2021 5/12/2021 2" 17.50' 8.8' 8.7' 9.2'-8.8' <LOQ 94500 34200 41000 3880 25400 9490 <LOQ 11.7 548 <LOQ <LOQ 2290 26.6 80.7 <LOQ 25300 1660 <LOQ <LOQ <LOQ 124 <LOQ 199 2" 17.50' 7.3' 10.2' 8.5'-7.3' <LOQ 72800 4820 32000 1980 24400 884 <LOQ <LOQ 102 <LOQ <LOQ 464 2340 230 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 240 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 2" 17.50' 7.80' 9.7' 9.10'-7.80' <LOQ 55900 587 23400 2150 18000 264 <LOQ <LOQ 38.7 <LOQ <LOQ 30.3 <LOQ <LOQ <LOQ 181 20.4 <LOQ <LOQ <LOQ <LOQ <LOQ 196 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 55900 57 <LOQ <LOQ <LOQ 94500 120 0.012 5 <LOQ 72800 125 0.01 <LOQ 1 1 40 0.2 units mg/L ug/L ug/L 5 240 <LOQ <LOQ 25 400 <LOQ <LOQ 50 310 <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 1(RFW-7S): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RFW-7S 2018 11/8/2018 RFW-7S 2020 3/9/2020 RFW-7S 2021 5/12/2021 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 23400 <LOQ <LOQ 1.74 7.28 41000 <LOQ <LOQ 3.69 7.15 32000 <LOQ <LOQ 2.9 7.28 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 16 300 0.189 0.86 16.6 17.6 526 0.364 1.05 36.1