sample identified in this report. Page 4 of 4 Sample No.AX08483 REPORT OF ANALYSIS Westchester County Department of Labs and Research Sample Location : 10 Dana Road Received By : JLM Bottle No : S0966 E3182 B699 B585 G4682 D1714 F637 C0126 K8926 K1257 K1270 K7747 K1099 K1016 CROTON POINT PARK CROTON, NY 10520 Collection Point : Valhalla, New York 10595 RR 2S Collected By : DUVAL & STEY Collection Date : 05/04/2021 AT 9:00:00AM Submitted On : 05/04/2021 AT 11:42:00AM PWS No. : Type Descriptor : Source ID : 000 ID of Source : Agency : Croton Landfill Westchester County DEF 270 North Avenue New Rochelle, New York 10801 Attn: Peter Costa pH : Free Cl2 : Residual Cl2 : Sample chilled on arrival ? : YES Sample Type : NP_STRM addt'l Report To : Comment : Method Test Description Results Qualifier Units DL/LOQ Analyzed on Validator Inorganics ASP Metals by EPA 6010C EPA 6010C EPA 6010C EPA 6010C EPA 6010C EPA 6010C EPA 6010C Boron Calcium Iron Magnesium Potassium Sodium 136 149000 15800 64600 7210 47600 ug/L ug/L ug/L ug/L ug/L ug/L 50 05/20/2021 1000 05/20/2021 50 05/20/2021 1000 05/20/2021 100 05/20/2021 100 05/20/2021 MO MO MO MO MO MO Matrix spike recovery for Calcium, Magnesium, Sodium, and Potassium was above acceptable QC limits due to matrix masking (high analyte value obscured spike recovery). E.M. 5/21/2021 ASP Metals by EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A EPA 6020A Aluminum Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Nickel Selenium 8770 < LOQ < LOQ 498 < LOQ < LOQ 17.4 47.0 552 < LOQ 3990 105 < LOQ 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 50.0 05/20/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 50.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 10.0 05/19/2021 20.0 05/19/2021 MO MO MO MO MO MO MO MO MO MO MO MO MO NYSDOH ELAP and NELAC do not offer accreditation for Alkalinity, Ammonia, Biochemical Oxygen Demand, Total Kjeldahl Nitrogen and Total Phosphorus in the S&HW Matrix. Unless the sample is otherwise qualified, all Quality Control acceptance criteria have satisfied method and NELAC requirements. DL = Detection Limit Approved By LOQ = Limit of Quantitation Robert Hilbrandt Environmental Laboratories NYS ELAP # 10108 (914) 231-1620 J=value is an estimate QA Officer Report Number: H = exceeds holding time Date Approved : 1772 07/12/2021 EMAIL 7/12/2021 These analytical results relate only to the sample identified in this report. Page 1 of 4 AX08483 Sample No. Method Test Description EPA 6020A Results Silver Thallium Vanadium Zinc EPA 6020A EPA 6020A EPA 6020A < LOQ < LOQ 37.9 75.9 Qualifier Units DL/LOQ Analyzed on ug/L ug/L ug/L ug/L J Validator 20.0 05/19/2021 10.0 05/19/2021 20.0 05/20/2021 80.0 05/19/2021 MO MO MO MO "J" Flag - Estimated value for Zinc found below the calibration range and at or above the detection limit. RWHJr SM22 2320B Alkalinity as Calcium Carbonate - ASP >500 mg/L 5.0 05/07/2021 MO Alaklinity result beyond titrametric range of instrument, upper limit reported SM22-5210B Biochemical Oxygen Demand ASP BOD Set Date and Time EPA 6010C ASP Calcium by ICP-AES SW846/9253 Chloride - ASP SW846-9012A ASP Total Cyanide HACH 8000 Chemical Oxygen Demand - ASP SM20-2120B Color, Apparent - ASP EPA 6010C ASP Hardness as Calcium Carbonate SW846-7196A Hexavalent Chromium, ASP SW846-7470A ASP Mercury SW846-6010C ASP Magnesium SM22-4500NH3-G Ammonia as N SM22-4500NO2B Nitrite Nitrogen as N EPA 353.2, Rev 2.0 N-Nitrate Calculated EPA 9040C Corrosivity/pH SM21-5210B 2.80 Completed 149000 105 0.005 75 50 640 < LOQ 0.275 64600 < LOQ < LOQ < LOQ 6.79 mg/L ug/L mg/L mg/L mg/L units mg/L ug/L ug/L ug/L mg/L mg/L mg/L Units 2 05/10/2021 9:53 am 05/05/2021 11:32 am 1000 05/20/2021 25.0 05/25/2021 0.005 05/12/2021 5.0 05/10/2021 5 05/04/2021 2:56 pm 1 05/21/2021 40 05/04/2021 3:06 pm 0.20 05/14/2021 1000 05/20/2021 0.05 05/21/2021 0.01 05/05/2021 11:23 am 0.05 05/21/2021 0.1 05/04/2021 2:56 pm Note: The Corrosivity/pH test is an Analyze Immediately On-Site (AIOS) parameter. AIOS parameters have a 15 minute hold time. The Laboratory provides this test result only as a guide. RWHJr EPA 9065 Phenolics, Total Recoverable Not Detected mg/L 0.004 05/13/2021 SW846-3005A ASP Metals Digestion - Aqueous Completed 05/13/2021 40CFR136 NH4 Preparation Completed 05/20/2021 Ammonia as N analyzed by On-line Gas Diffusion Automated Salicylate Method, as appears in Method Update Rule II, 40CFR 136, Table 1B, Federal Register Volume 77 Number 97, pursuant to Clean Water Act promulgated 06/01/2012. 40CFR136 SW846/9056A SM22-2540C SM22-4500Norg D SW846-9060A EPA 180.1 TKN Digestion/Diffusion Method Sulfate, Aqueous - ASP Total Dissolved Solids Total kjeldahl nitrogen as N - ASP Total Organic Carbon - ASP Turbidity Completed 57.0 876.0