0.873 0.32 <LOQ 48.2 <LOQ <LOQ <LOQ 1.74 <LOQ <LOQ <LOQ <LOQ 1.89 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 1.73 0.793 <LOQ <LOQ <LOQ <LOQ <LOQ 2.45 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.884 <LOQ <LOQ 28.3 <LOQ <LOQ <LOQ 0.737 <LOQ <LOQ <LOQ <LOQ 2.36 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ RR-1 2021 5/4/2021 1.05 0.45 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 0.35 <LOQ <LOQ 11.3 <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 6 (RR1): 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-1 RR-1 2018 2020 10/30/2018 3/2/2020 <LOQ 0.42 <LOQ 0.681 <LOQ 0.26 <LOQ 12.9 <LOQ <LOQ <LOQ 0.622 <LOQ <LOQ <LOQ 12.3 RR-1 2021 5/4/2021 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 10.7 4 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR7): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RR-7 2018 10/31/2018 RR-7 2020 3/3/2020 RR-7 2021 5/5/2021 2" 2" 75.80' 75.80' 69' 68.40' 6.8' 7.4' 69.25'-69' 68.7'-68.4' <LOQ <LOQ 165000 142000 4850 3980 101000 87500 5960 5410 6360 6210 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 582 466 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 3780 3260 13.9 10 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ >500 >500 2" 75.80' 68.9' 6.9' 69.2'-68.9' <LOQ 197000 5390 97000 6720 6510 842 <LOQ <LOQ 751 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 4350 15.5 <LOQ <LOQ <LOQ <LOQ <LOQ >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 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 165000 19 <LOQ 16 <LOQ 142000 16 <LOQ 8 <LOQ 197000 16 <LOQ 8 1 1 40 0.2 units mg/L ug/L ug/L 5 830 <LOQ <LOQ 50 720 <LOQ <LOQ 10 890 <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 (RR7): Groundwater Constituent: Sampling Period: Sampling Date: DL/LOQ Units RR-7 2018 10/31/2018 RR-7 2020 3/3/2020 RR-7 2021 5/5/2021 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 101000 <LOQ <LOQ <LOQ 6.73 87500 0.0542 <LOQ 0.078 6.76 97000 <LOQ <LOQ 0.0567 6.66 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 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 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 5 5 <LOQ 0.005 Not Detected Complete Complete Complete Complete Complete Complete 26 956 0.327 3 16.8 31.4 934 0.288 3.16 5.42 34.5 946 0.489 3.68 22.1 ug/L <LOQ ug/L <LOQ ug/L <LOQ ug/L <LOQ ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed ug/LNot Analyzed <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 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 5.09 0.616 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 3.21 0.31 <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ <LOQ 5.47 0.638 <LOQ <LOQ <LOQ <LOQ <LOQ 2 Croton Point Sanitary Landfill Railroad 1 Landfill, NYSDEC Site #360001 Post Closure Monitoring and Sampling Report, Table 6 (RR7): 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