AddendumXIQ&AMatrix2Part2.pdf

Page 1 | Taconic DC RFP

REQUEST FOR PROPOSALS

FOR THE PURCHASE AND DEVELOPMENT OF

TACONIC DEVELOPMENTAL CENTER

Addendum #11

Release Date: February 19, 2025

QUESTION AND ANSWER #2 PART 2

The following is a list of responses to questions submitted by prospective respondents to the RFP for the Purchase and Development of the Taconic Developmental Center, available here:

https://esd.ny.gov/doing-business-ny/requests-proposals/purchase-and-development-taconic-developmental-center.

No. Question Answer

Can you please give us as much information as possible for the existing water system: (1) well reports / max daily yield, (2) well / water supply permits, (3) age of: pumps / water filtration system / storage tanks / existing pipe network?

The majority of the pump, treatment equipment, and pipe infrastructure were either built or upgraded in 2006. The storage tank is from the 1930s. Additional reports and permits pertaining to the wells are provided below.

I would like to obtain as built site documents pertaining to the following systems: (1) water system with site distribution from pump house,

(2) wastewater system with sewer lines, (3) electric system with site distribution from main, and (4) infrastructure site utilidors that may include above noted systems. My understanding is there are either steam and/or chiller pipes housed.

Available documentation about the water, wastewater, and electrical systems will be provided to the designated developer.

The utilidors contain steam pipes, chiller pipes, and fiber communication lines.

https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fesd.ny.gov%2Fdoing-business-ny%2Frequests-proposals%2Fpurchase-and-development-taconic-developmental-center&data=05%7C02%7CRalph.Volcy%40esd.ny.gov%7C63f221e83d3a4b58168c08dd50edddd1%7Cf46cb8ea79004d108ceb80e8c1c81ee7%7C0%7C0%7C638755704746945101%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=s6CVCpj0jYQ%2BJW9lpj5V41WTGcDVTpWOkRWWGA%2BKKR0%3D&reserved=0 https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fesd.ny.gov%2Fdoing-business-ny%2Frequests-proposals%2Fpurchase-and-development-taconic-developmental-center&data=05%7C02%7CRalph.Volcy%40esd.ny.gov%7C63f221e83d3a4b58168c08dd50edddd1%7Cf46cb8ea79004d108ceb80e8c1c81ee7%7C0%7C0%7C638755704746945101%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=s6CVCpj0jYQ%2BJW9lpj5V41WTGcDVTpWOkRWWGA%2BKKR0%3D&reserved=0

Page 2 | Taconic DC RFP

No. Question Answer

Do you have status docs on the landfills? Closure and maintenance reports? Would the State consider not disposing of this section of the property as part of the sale in conjunction with cemetery area?

The landfill closure report and most recent monitoring report are below.

A proposal that doesn't result in disposition by the State and acquisition by the designated developer of the landfills should provide the rationale for why and how this would affect the master plan. The specifics of the proposal will be reviewed, and a decision made on a case-by-case basis.

4 Can we get a copy of the asbestos survey mentioned in the Phase 1?

Available environmental documentation will be provided to the designated developer.

Do you have a copy of the most recent SPDES permit? The active SPDES report is below.

Do you have any site plans or surveys available besides the building location map provided?

Available documentation will be provided to the designated developer.

Annual Drinking Water Quality Report for 2024

Wassaic TDDSO Water System

26 Center Circle, Wassaic, NY 12592

(Public Water Supply ID# 1310291)

INTRODUCTION

To comply with State regulations, Wassaic TDDSO Water issues this annual report describing the quality of your drinking water. The purpose of this report is to raise your understanding of drinking water and awareness of the need to protect our drinking water sources. Last year, your tap water met all State drinking water health standards.

We are proud to report that our system did not violate a maximum contaminant level or any other water quality standard. This report provides an overview of last year’s water quality. Included are details about where your water comes from, what it contains, and how it compares to State standards.

If you have any questions about this report or concerning your drinking water, please contact VRI Environmental Services at (845) 677-3839. We want you to be informed about your drinking water.

WHERE DOES OUR WATER COME FROM?

In general, the sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activities. Contaminants that may be present in source water include:

microbial contaminants; inorganic contaminants; pesticides and herbicides; organic chemical contaminants; and radioactive contaminants. In order to ensure that tap water is safe to drink, the State and the EPA prescribe regulations which limit the amount of certain contaminants in water provided by public water systems. The State Health Department’s and the FDA’s regulations establish limits for contaminants in bottled water which must provide the same protection for public health.

Our water system serves approximately 165 people through 25 service connections. The water supply consists of four wells located within the Wassaic campus. The source wells are designated #1a, #2a, #5 and #7. The water is pumped from the wells to a clear well, then through a filtration system and is sent to a 275,000-gallon storage tank.

There is also a 1,000,000 gallon finished water storage tank currently not in regular use. The well water is disinfected with sodium hypochlorite prior to entering the distribution system.

Well #7 has been put back into service as per DOH approval on November 14, 2024. A full part 5 was collected on September 19, 2024 and submitted to DOH for approval.

Failure to have a functioning SCADA (Supervisory Control and Data Acquisition) system is a violation of 5-1.71(b) of the NYS Sanitary Code of not operating according to the approved plans from 2007.

ARE THERE CONTAMINANTS IN OUR DRINKING WATER?

As the State regulations require, we routinely test your drinking water for numerous contaminants. These contaminants include: total coliform, turbidity, inorganic compounds, nitrate, nitrite, lead and copper, volatile organic compounds, total trihalomethanes, haloacetic acids, synthetic organic compounds, and radiologicals. The table presented below depicts which compounds were detected in your drinking water. The State allows us to test for some contaminants less than once per year because the concentrations of these contaminants do not change frequently. Some of our data, though representative, are more than one year old.

It should be noted that all drinking water, including bottled drinking water, may be reasonably expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline (800-426-4791) or the Dutchess County Health Department at (845) 486- 3404.

Table of Detected Contaminants

Contaminant

Violation Yes/No

Date of Sample

Level

Detected (Avg/Max) (Range)

Unit

Measure-ment

MCLG

Regulatory Limit (MCL, AL or TT)

Likely Source of Contamination

Uranium No 12/20/2019 1.44 ug/L 0 MCL = 30 Erosion of natural deposits.

Nitrate No 2/6/2024 0.03 mg/L 10 MCL = 10 Runoff from fertilizer use, leaching from septic tanks, sewage;

erosion of natural deposits.

Copper *

No 12/21/2022

0.3145

(Range =

0.0255 – 0.473) mg/L 1.3 AL = 1.3 Corrosion of household plumbing systems; Erosion of natural deposits;

leaching from wood preservatives.

Lead ** No 12/21/2022 13.65

(Range =

ND – 16.7)

ug/L 0 AL = 15 Corrosion of household plumbing systems; Erosion of natural deposits.

Barium

No 9/15/2022 0.035 mg/L 2 MCL = 2 Discharge of drilling wastes; Discharge from metal refineries;

Erosion of natural deposits.

Selenium No 9/15/2022 2 ug/L 50 50 Discharge from petroleum and metal refineries; Erosion of natural deposits.

Discharge from mines.

Total Trihalomethanes

No 9/15/2022 12.8 ug/L n/a MCL = 80 By-product of drinking water chlorination needed to kill harmful organisms. TTHMs are formed when source water contains large amounts of organic matter.

Haloacetic Acids No 9/15/2022 2.2 ug/L n/a MCL = 60 By-product of drinking water disinfection needed to kill harmful organisms.

Methyl Tertiary Butyl Ether

(MTBE)

Well 1

Well 5

No 9/16/2024

0.62

0.50 ug/L n/a 10 Releases from gasoline storage tanks. MTBE is an octane enhancer in unleaded gasoline.

Atmospheric deposition.

Uranium Well 7

No 9/19/2024 1.6 ug/L 0 MCL = 30 Erosion of natural deposits.

Table of Detected Contaminants

Violation Yes/No

Level

Detected (Avg/Max)

Measure-ment

MCLG

Regulatory Limit (MCL, AL or TT)

Likely Source of Contamination

Barium Well 7

No 9/19/2024 0.041 mg/L 2 MCL = 2 Discharge of drilling wastes; Discharge from metal refineries;

Erosion of natural deposits.

Iron Well 7

No 9/19/2024 108 ug/L n/a MCL = 300 Naturally occurring.

Hardness Well 7

No 9/19/2024 242 mg/L n/a n/a

Manganese Well 7

No 9/19/2024 136 ug/L n/a MCL = 300 Naturally occurring;

Indicative of landfill contamination.

Sodium Well 7

No 9/19/2024 9.4 mg/L n/a *** See Health Effects

Naturally occurring;

Road salt; Water softeners; Animal waste.

Zinc Well 7

No 9/19/2024 0.009 mg/L n/a MCL = 5 Naturally occurring;

Mining waste.

Chloride Well 7

No 9/19/2024 21.5 mg/L n/a MCL = 250 Naturally occurring or indicative of road salt contamination.

Sulfate Well 7

No 9/19/2024 25.4 mg/L n/a MCL = 250 Naturally occurring.

Turbidity Well 7

No 9/19/2024 0.55 NTU n/a MCL = 1 Soil runoff.

Footnotes:

* The level presented represents the 90th percentile of the 5 sites tested. A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. The 90th percentile is equal to or greater than 90% of the copper values detected at your water system. In this case, 5 samples were collected at your water system and the 90th percentile value is the reported value. The action level for copper was not exceeded at any of the sites tested.

** The level presented represents the 90th percentile of the 5 sites tested. A percentile is a value on a scale of 100 that indicates the percent of a distribution that is equal to or below it. The 90th percentile is equal to or greater than 90% of the lead values detected at your water system. In this case, 5 samples were collected at your water system and the 90th percentile value is the reported value. The action level for lead was exceeded at 1 of the sites tested.

*** Water containing more than 20 mg/L of sodium should not be used for drinking by people on severely restricted sodium diets. Water containing more than 270 mg/L of sodium should not be used for drinking by people on moderately restricted sodium diets.

Table of Unregulated Detected Contaminants

Level Detected

(Max)

Measurement

Likely Source of Contamination

Perfluorononanoic Acid

(PFNA)

Well 2

9/19/2024 1.02 ng/L Released into the environment from widespread use in commercial and industrial applications.

Definitions:

Non - Detects (ND) - Laboratory analysis indicates that the constituent is not present.

Milligrams per liter (mg/l) – Corresponds to one part of liquid in one million parts of liquid (parts per million – ppm).

Micrograms per liter (ug/l) – Corresponds to one part of liquid in one billion parts of liquid (parts per billion – ppb).

Action Level (AL) - The concentrations of a contaminant, which, if exceeded, triggers treatment, or other requirements, which a water system must follow.

Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCL's are set as close to the MCLG's as feasible.

Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLG's allow for a margin of safety.

Maximum Residual Disinfectant Level (MRDL) – The highest level of a disinfectant allowed in drinking water.

There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

Maximum Residual Disinfectant Level Goal (MRDLG) – The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contamination.

Nephelometric Turbidity Unit (NTU) – A measure of the clarity of water. Turbidity in excess of 5 NTU is just noticeable to the average person.

Treatment Technique (TT) – A required process intended to reduce the level of a contaminant in drinking water.

Picocuries per liter (pCi/L) – A measure of the radioactivity in water.

WHAT DOES THIS INFORMATION MEAN?

As you can see by the table, our system had no violations. We have learned through our testing that some contaminants have been detected; however, these contaminants were detected below the level allowed by the State. We are required to present the following information on lead in drinking water.

Lead can cause serious health effects in people of all ages, especially pregnant people, infants (both formula-fed and breastfed), and young children. Lead in drinking water is primarily from materials and parts used in service lines and in home plumbing. Wassaic TDDSO Water is responsible for providing high quality drinking water and removing lead pipes but cannot control the variety of materials used in the plumbing in your home. Because lead levels may vary over time, lead exposure is possible even when your tap sampling results do not detect lead at one point in time. You can help protect yourself and your family by identifying and removing lead materials within your home plumbing and taking steps to reduce your family's risk. Using a filter, certified by an American National Standards Institute accredited certifier to reduce lead, is effective in reducing lead exposures. Follow the instructions provided with the filter to ensure the filter is used properly. Use only cold water for drinking, cooking, and making baby formula. Boiling water does not remove lead from water. Before using tap water for drinking, cooking, or making baby formula, flush your pipes for several minutes. You can do this by running your tap, taking a shower, doing laundry or a load of dishes. If you have a lead service line or galvanized requiring replacement service line, you may need to flush your pipes for a longer period. If you are concerned about lead in your water and wish to have your water tested, contact VRI Environmental Services for Wassaic TDDSO Water. Information on lead in drinking water, testing methods, and steps you can take to minimize exposure is available at https://www.epa.gov/safewater/lead.

IS OUR WATER SYSTEM MEETING OTHER RULES THAT GOVERN OPERATIONS?

During 2024, our system was in compliance with applicable State drinking water operating, monitoring and reporting requirements.

INFORMATION ON LEAD SERVICE LINE INVENTORY

A Lead Service Line (LSL) is defined as any portion of pipe that is made of lead which connects the water main to the building inlet. An LSL may be owned by the water system, owned by the property owner, or both. The inventory includes both potable and non-potable SLs within a system. In accordance with the federal Lead and Copper Rule Revisions (LCRR) our system has prepared a preliminary lead service line inventory and have made it publicly accessible by visiting https://www.health.ny.gov/environmental/water/drinking/service_line/NY1310291.htm https://www.epa.gov/safewater/lead https://www.health.ny.gov/environmental/water/drinking/service_line/NY1310291.htm

DO I NEED TO TAKE SPECIAL PRECAUTIONS?

Although our drinking water met or exceeded state and federal regulations, some people may be more vulnerable to disease causing microorganisms or pathogens in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice from their health care provider about their drinking water. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium, Giardia and other microbial pathogens are available from the Safe Drinking Water Hotline (800-426-4791).

WHY SAVE WATER AND HOW TO AVOID WASTING IT?

Although our system has an adequate amount of water to meet present and future demands, there are a number of reasons why it is important to conserve water:

Saving water saves energy and some of the costs associated with both of these necessities of life;

Saving water reduces the cost of energy required to pump water and the need to construct costly new wells, pumping systems and water towers; and Saving water lessens the strain on the water system during a dry spell or drought, helping to avoid severe water use restrictions so that essential fire fighting needs are met.

You can play a role in conserving water by becoming conscious of the amount of water your household is using, and by looking for ways to use less whenever you can. It is not hard to conserve water. Conservation tips include:

Automatic dishwashers use 15 gallons for every cycle, regardless of how many dishes are loaded. So get a run for your money and load it to capacity.

Turn off the tap when brushing your teeth.

Check every faucet in your home for leaks. Just a slow drip can waste 15 to 20 gallons a day. Fix it up and you can save almost 6,000 gallons per year.

Check your toilets for leaks by putting a few drops of food coloring in the tank, watch for a few minutes to see if the color shows up in the bowl. It is not uncommon to lose up to 100 gallons a day from one of these otherwise invisible toilet leaks. Fix it and you save more than 30,000 gallons a year.

CLOSING

Thank you for allowing us to continue to provide your family with quality drinking water this year. In order to maintain a safe and dependable water supply we sometimes need to make improvements that will benefit all of our customers. The costs of these improvements may be reflected in the rate structure. Rate adjustments may be necessary in order to address these improvements. We ask that all our customers help us protect our water sources, which are the heart of our community. Please call our office if you have any questions.

COUNTY OF DUTCHESS

DEPARTMENT OF HEALTH

85 Civic Center Plaza - Suite 106 Poughkeepsie, NY 12601

2025 PERMIT TO OPERATE A

PUBLIC WATER SUPPLY

This is to certify that

TACONIC DDSO

Legal Name of Water Supply

NY1310291

Public Water Supply (PWS) #

Located in DOVER in DUTCHESS County

Owned by NYS OFFICE FOR PEOPLE WITH DEVELOPMENTAL DISABILITIES is granted permission to operate said Public Water Supply in compliance with the provisions of the New York State and Dutchess County Sanitary Codes.

This permit is granted subject to any and all applicable State, Local and Municipal Laws, ordinances, rules and regulations.

Permit is Valid until January 31, 2026

3/11/2025 Date Issued Livia Santiago-Rosado, MD, FACEP

Commissioner

Permit must be posted and is non-transferable

Validate

Permit ID: PWS4283

2024 POST-CLOSURE MONITORING ANNUAL REPORT

Taconic Developmental Center

Construction & Demolition Debris Landfill

Colliers Engineering & Design

Office:

280 East Broad Street, Suite 200

Rochester, NY 14604

Phone: 585.232.5135 www. colliersengineering.com

Issued: February 3, 2025 http://www.bergmannpc.com/

LANDFILL – 2024 ANNUAL REPORT

Accelerating success.

TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 Post-Closure Montioring and Maintenance Program

2.0 2024 ANNUAL BASELINE SAMPLING EVENT

3.0 LEACHATE OCCURRENCE

4.0 ACTIVITIES PLANNED FOR 2025

TABLES

Table 1: Summary of Well Details and Historic Depth to Water Measurements

Table 2: Leachate Indicators Analytical Results

Table 3: Inorganic Metals Analytical Results

Table 4: Volatile Organic Analytical Results

FIGURES

Figure 1: Monitoring Point Location Map

APPENDICES

Appendix 1: Annual Leachate Tracking Charts

Appendix 2: Field Forms

Appendix 3: Laboratory Analytical Report

Appendix 4: NYSDEC Sampling Reduction Letter

Appendix 5: NYSDOH ELAP Certification

1.0 INTRODUCTION

This annual summary report documents post-closure activity conducted for the 2024 calendar year at the closed

Construction and Demolition (C&D) debris landfill located at the New York State Office for People with

Developmental Disabilities (OPWDD) Taconic Developmental Center, 26 Center Circle, Wassaic, New York.

Bergmann performed these activities under authorization from the OPWDD.

The landfill is located approximately 150-feet east of the Ten Mile River, situated within the southwest corner of the 750-acre Taconic DDSO Campus. The landfill consists of an approximately 150-feet by 250-feet solid waste disposal area, adjacent to the south side of a former sand and gravel quarry.

According to information provided to Bergmann, waste disposal activities at the landfill at the Taconic DDSO

Campus occurred in the early 1970’s through the late 1990’s. The majority of the waste disposed of at the landfill included old furniture, mattresses, box springs, construction and demolition debris, and white goods.

Additionally, limited quantities of sludge from oil/water separators, putrescible waste from facility dining, spent containers from janitorial activities, cleaning supplies, and general trash have likely been disposed of at this site.

According to documentation provided to Bergmann, groundwater was sampled and analyzed for baseline parameters in June 2004 prior to closure of the landfill in July 2004. Due to high turbidity and high metal concentrations in the samples collected, the New York State Department of Environmental Conservation

(NYSDEC) requested that supplemental sampling using low-flow techniques be completed. The NYSDEC required that additional groundwater and surface water samples be analyzed for 6 NYCRR Part 360 baseline parameters. Per the documentation received by Bergmann, monitoring events have previously been conducted fifteen (15) times from 2004 until 2021.

According to the documentation, in a January 16, 2009, letter to DASNY and OPWDD, NYSDEC requested that the three monitoring wells located at the site be analyzed annually for baseline parameters to establish a record of groundwater quality at the site. This request was made due to incongruent groundwater data between July

2004 and August 2008. The NYSDEC indicated that following several rounds of groundwater quality data, DASNY may petition to reduce or eliminate the annual groundwater monitoring program, with samples being collected 2009, 2010, and 2011.

A Data Gap Investigation Work Plan was submitted to NYSDEC and was approved in November 2012. Work was carried out at the site in February and March 2013, and was followed by a Data Gap Investigation Report submitted to the NYSDEC in April 2013. NYSDEC rejected the recommendations made in this report, and an agreement was reached which included six (6) quarterly rounds of groundwater sampling and disposal area cap repairs. The six sampling events were completed in April, July, and October of 2015 and January, June, and

October of 2016. Samples were collected, water levels were gauged, and groundwater flow direction was determined through this sampling. One additional round of sampling was conducted in 2018.

On August 27, 2020, a Variance Request was submitted to the NYSDEC on behalf of the Dormitory Authority of the State of New York (DASNY) to reduce the sampling frequency to one (1) annual sampling event to be performed in the same quarter each year. The NYSDEC agreed to this sampling reduction as per a letter dated

September 14, 2020. DASNY’s sampling reduction request and the NYSDEC response letter are included in

Appendix 4.

During 2024, the annual routine sampling event was conducted on December 5, 2024.

During 2024, laboratory analysis was performed for Part 360 Routine Parameters. Results were compared to

NYSDEC Class GA Standards. None of the analytical results for the December 5, 2024, sampling event were found to be at or above their applicable standard.

1.1 POST-CLOSURE MONITORING AND MAINTENANCE PROGRAM

There are three (3) groundwater monitoring wells associated with the landfill located beyond the extent of the former waste disposal area that are maintained and monitored during the post-closure period. The wells are identified as MW-01, MW-02, and MW-03, and are shown on Figure 1 – Monitoring Point Location Map. The monitoring wells consist of two-inch diameter PVC installed into the underlying stream sediment soils.

Monitoring wells MW-1, MW-2, and MW-3 are sampled for post-closure monitoring purposes. Monitoring Wells

MW-1 and MW-3 wells were inspected and sampled during the 2024 sampling event, and MW-2 was dry during the December 2024 sampling event.

Monitoring well MW-3 has been designated as the up-gradient monitoring point. Groundwater values at this point are indicative of local groundwater quality not impacted by the landfill. Monitoring well MW-2 is located cross-gradient from the landfill, while monitoring well MW-1 is located at a down-gradient location at the toe of the landfill cap.

2.0 2022 ANNUAL BASELINE SAMPLING EVENT

During 2024, the annual site inspections and groundwater sampling event was conducted on December 5, 2024 and consisted of Part 360 Routine Parameters.

2.1 WATER LEVEL GAUGING

Monitoring wells MW-01, MW-02, and MW-03 were gauged for water level elevations prior to sampling to assess groundwater elevation and evaluate groundwater flow at the site. Groundwater elevations at the site ranged from 7.50 feet (ft) below top of casing (btoc) at MW-01 to dry at MW-02. Depths to groundwater for the

December 5, 2024, monitoring event are provided in Table 1 – Summary of Well Details and Historic Depth to

Groundwater.

Historic depths to water measurements from 2011, 2018, 2020, and 2021 derived from documentation provided to Bergmann, are also provided in Table 1. Data provided to Bergmann appears to indicate that seasonal variation is the reason for changes in depth between 2011 and 2024.

2.2 GROUNDWATER SAMPLING

Monitoring wells MW-01, and MW-03 were sampled on December 5, 2024. Monitoring well MW-02 did not have a measurable water column present at the time of the sampling. The monitoring wells were purged using a peristaltic pump and dedicated tubing. Water quality indicator parameters were measured prior to sampling using a YSI Professional Plus Multiparameter Instrument which was calibrated in accordance with manufacturers specifications prior to use. Parameters measured included: turbidity, temperature, pH, conductivity, and oxygen.

Data from these measurements are provided in Appendix 3 – Field Forms.

The Taconic Developmental Center Landfill is no longer subject to NYSDEC Part 360 Baseline Parameters

Analysis, per NYSDEC’s direction in a letter dated September 14, 2020. Routine Parameters are carried out during the annual sampling event.

Laboratory analytical results for Part 360 Routine Parameters are summarized in Tables 2, 3, and 4, and the laboratory analytical report is included with this report in Appendix 2 – Laboratory Analytical Results. The criteria for NYSDEC Class GA groundwater standards are listed for those parameters for which Class GA standards have been established. No analytical results were determined to be at or above the NYSDEC Class GA parameters for the December 12, 2024, sampling event.

An equipment blank consisting of distilled water was submitted for laboratory analyses during this sampling event. The groundwater samples were submitted to ALS in Rochester, New York for laboratory analyses.

3.0 LEACHATE OCCURRENCE

During the 2024 annual site visit and inspection, visual evidence of leachate breakout was not observed at the landfill site.

To help identify potential occurrences of leachate, assist in the long-term tracking of groundwater quality and to help determine if a significant increase has occurred, key groundwater quality parameters were plotted on tracking charts. These charts include selected groundwater analytical results obtained from monitoring wells

MW-01, MW-02 and MW-03.

Parameters tracked on the charts include:

• Chart C-1, Aluminum.

• Chart C-2, Iron.

• Chart C-3, Sodium.

• Chart C-4, Thallium.

• Chart C-5, Ammonia.

• Chart C-6, Phenols.

• Chart C-7, Magnesium

• Chart C-8, Manganese

The tracking charts present analytical data for 18 sampling events, between June 2004 and December 2024.

Analytical results from well MW-03 are indicative of up-gradient groundwater conditions, and results from monitoring well MW-01 are indicative of down-gradient conditions.

The charts indicate that a significant increase in the tracked parameters has not occurred as of December 2024.

A general trend indicative of increasing values over time, between November 2002 and December 2024 was not apparent, as presented on the control charts. Control charts are included in Appendix 2 – Leachate Tracking

Charts.

4.0 ACTIVITIES PLANNED FOR 2025

The following activities are anticipated for the 2025 calendar year at the Landfill.

• During 2025, groundwater sampling will continue to be conducted annually in Q4, unless otherwise directed by the NYSDEC.

• The annual site sampling event is tentatively scheduled for the following date:

1. Q4 2025, Part 360 Routine Parameters Analysis.

TABLES

TACONIC DDSO CAMPUS LANDFILL

WASSAIC, NEW YORK

TABLE 1

SUMMARY OF WELL DETAILS AND HISTORIC DEPTH TO GROUNDWATER

Monitoring Well Elevation Depth to

Well Type Top of casing Bottom

MW-01 2" PVC 412.62 17.10 5.99 6.13 7.70 5.93 6.32 4.60 7.50

MW-02 2" PVC 417.72 11.69 9.94 10.22 ND ND 10.20 8.20 ND

MW-03 2" PVC 413.21 15.44 4.80 4.89 3.48 4.79 13.97 3.64 6.75

Depth to Bottom = Depth to the bottom of the well relative to local ground surface at the time of well installation

* - Estimated value ND= Depth to groundwater not determined.

12/5/202412/12/202312/29/20229/29/20216/2/2011 5/9/2018 9/23/2020

TABLE 2

LEACHATE INDICATORS

ANALYTICAL RESULTS

MW-1

Parameter NYSDEC

MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1

Leachate Indicators Class MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L GA 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16 5/9/18 6/19/20 9/23/20 9/29/21

MG/L * * * * * * * * * * * * * * *

Ammonia 2.0 ND ND ND ND 0.089 0.091 ND 0.1007 0.082 1.28 0.051 0.14 0.016 <0.30 <0.30 BOD-5 None 17 ND ND * * * * * * * * * * <4.0 <4.0 Bromide 2.0 * ND ND * * * * * * * * * ND ND 0.022 COD None * ND ND * * * * * * * * * 27.1 <15. <15.

Chloride 250.0 86 90 91 * * * * * * * * 99.7 83.0 110 69 Color (True) None 60 ND ND * * * * * * * * * * <5.0 <5.0 Hexavalent Chromium 0.050 * ND ND * * * * * * * * * * <0.0040 <0.0040 Nitrate Nitrogen 10.0 0.645 J ND 0.462 * * * * * * * * 1.4 * 1 0.68 Sulfate 250.0 BMDL 49 12.0 J * * * * * * * * 60.7 69.9 29 34 T-Alkalinity None 230 J 280 240 * * * * * * * * 249 265 240 250 T-Cyanide 0.10 * ND ND * * * * * * * * * * ND <0.010 T-Dissolved Solids None 405 580 530 * * * * * * * * 445 615 300 34 T-Hardness None 2,000 310 312.69 * * * * * * * * 332 380 320 290 TKN None * 0.12 4.23 * * * * * * * * 0.78 * <1.0 <1.0 TOC 1 None * * * * * * * * * * * * * NA NA TOC 2 None * * * * * * * * * * * * * NA NA TOC 3 None * * * * * * * * * * * * * NA NA TOC 4 None * * * * * * * * * * * * * NA NA Average TOC None 5.31 J ND 1.16 * * * * * * * * 1.2 * <1.0 0.9 Total Phenols None ND ND 0.032 ND 0.006 ND 0.006 ND ND 0.022 0.003 * * <0.050 <0.050

Comments Class GA = NYSDEC Standard for Groundwater MG/L = Miligrams per Liter (PPM) None= Not Applicable, no established Class GA Standard for this compound TOC = Total Organic Carbon. The appropriate test method requires that TOC analysis be performed 4 consecutive times per sample

* = Data missing from records provided to Bergmann / Colliers Engineering & Design

TABLE 2

LEACHATE INDICATORS

ANALYTICAL RESULTS

Parameter NYSDEC Leachate Indicators Class

GA

MG/L

Ammonia 2.0 BOD-5 None Bromide 2.0 COD None Chloride 250.0 Color (True) None Hexavalent Chromium 0.050 Nitrate Nitrogen 10.0 Sulfate 250.0 T-Alkalinity None T-Cyanide 0.10 T-Dissolved Solids None T-Hardness None TKN None TOC 1 None TOC 2 None TOC 3 None TOC 4 None Average TOC None Total Phenols None

MW-2

MW-1 MW-1 MW-1 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2

MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L

12/29/22 12/12/23 12/5/24 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16 5/9/18 6/19/20 Routine Routine Routine * * * * * * * * * * * * *

0.070 J ND ND ND ND ND ND 0.082 0.054 ND 0.134 0.099 0.565 0.042 0.096J NS

ND ND ND 25 J ND ND * * * * * * * * * NS

ND NS NS * ND NS * * * * * * * * * NS

ND ND ND * 6.1 ND * * * * * * * * * NS

47.7 54.1 68.3 24 23 38 * * * * * * * * 27.4 NS

ND 7.0 1.8 60 ND ND * * * * * * * * * NS

ND ND ND * ND ND * * * * * * * * * NS

1.0 1.1 ND BMDL 0.48 0.915 * * * * * * * * 0.7 NS

22.1 31.8 27.3 45 J 8.9 53 * * * * * * * * 8.8 NS

236 259 254 190 J 190 210 * * * * * * * * 161 NS

ND ND ND * NS ND * * * * * * * * * NS

350 363 391 217 250 350 * * * * * * * * 211 NS

254 304 289 4,100 170 241.11 * * * * * * * * * NS

0.307 ND ND * 0.1 6.74 * * * * * * * * 0.58 NS

NA * * * * * * * * * * * * * * NS

NA * * * * * * * * * * * * * * NS

NA * * * * * * * * * * * * * * NS

NA * * * * * * * * * * * * * * NS

0.673 ND ND 3.18 J 1.30 2.05 * * * * * * * * 1.40 NS

ND ND ND ND ND 0.036 ND ND ND ND 0.022 0.009 0.015 0.02 * NS

Comments Class GA = NYSDEC Standard for Groundwater MG/L = Miligrams per Liter (PPM) None= Not Applicable, no established Class GA Standard for this compound TOC = Total Organic Carbon. The appropriate test method requires that TOC analysis be performed 4 consecutive times per sample

TABLE 2

LEACHATE INDICATORS

ANALYTICAL RESULTS

Parameter NYSDEC Leachate Indicators Class

GA

MG/L

Ammonia 2.0 BOD-5 None Bromide 2.0 COD None Chloride 250.0 Color (True) None Hexavalent Chromium 0.050 Nitrate Nitrogen 10.0 Sulfate 250.0 T-Alkalinity None T-Cyanide 0.10 T-Dissolved Solids None T-Hardness None TKN None TOC 1 None TOC 2 None TOC 3 None TOC 4 None Average TOC None Total Phenols None

MW-2 MW-3

MW-2 MW-2 MW-2 MW-2 MW-2 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3

MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L

9/23/20 9/29/21 12/29/22 12/12/23 12/5/24 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16

* * Routine Routine Routine * * * * * * * * * * *

<0.30 <0.30 0.049 J ND NS ND ND ND ND 0.074 0.153 ND 0.095 0.042 1.26 0.036

<4.0 <4.0 ND ND NS 17 J ND ND * * * * * * * *

ND <0.50 ND NS NS * ND NS * * * * * * * *

<15 <15 10 ND NS * 8.1 ND 14 * * * * * * *

34 27 28.4 18.1 NS 84 110 94 92 * * * * * * *

<5.0 <5.0 ND 10.0 NS 50 ND ND * * * * * * * *

<0.0040 <0.0040 ND ND NS * ND ND 0.02 J * * * * * * *

0.45 0.36 0.58 ND NS 0.974 J 1.4 0.698 1.21 * * * * * * *

14 6.9 11.8 6.7 NS 71 58 41 50 * * * * * * *

170 190 154 189.0 NS 230 J 240 230 230 * * * * * * *

ND ND ND ND NS * NS ND * * * * * * * *

210 180 190 213 NS 419 640 490 450 * * * * * * *

210 340 179 206 NS 1,800 340 306.24 157.12 * * * * * * *

<1.0 <1.0 0.485 0.20 NS * ND 4.47 * * * * * * * *

NA NA NA * NS * * * * * * * * * * *

NA NA NA * NS * * * * * * * * * * *

NA NA NA * NS * * * * * * * * * * *

NA NA NA * NS * * * * * * * * * * *

1.20 1.1 1.39 1.2 NS 1.43 J ND 0.853 ND * * * * * * *

0.061 0.079 ND ND NS ND ND 0.029 ND ND ND ND 0.006 ND 0.011 ND

Comments Class GA = NYSDEC Standard for Groundwater MG/L = Miligrams per Liter (PPM) None= Not Applicable, no established Class GA Standard for this compound TOC = Total Organic Carbon. The appropriate test method requires that TOC analysis be performed 4 consecutive times per sample

TABLE 2

LEACHATE INDICATORS

ANALYTICAL RESULTS

Parameter NYSDEC Leachate Indicators Class

GA

MG/L

Ammonia 2.0 BOD-5 None Bromide 2.0 COD None Chloride 250.0 Color (True) None Hexavalent Chromium 0.050 Nitrate Nitrogen 10.0 Sulfate 250.0 T-Alkalinity None T-Cyanide 0.10 T-Dissolved Solids None T-Hardness None TKN None TOC 1 None TOC 2 None TOC 3 None TOC 4 None Average TOC None Total Phenols None

MW-3 Equipment Blank

MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3

Equipment

Blank Equipment

Blank Equipment

Blank

MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L

5/9/18 6/19/20 9/23/20 9/29/21 12/29/22 12/12/23 12/5/24 12/29/22 12/12/23 12/5/24

* * * * Routine Routine Routine Routine Routine Routine

0.093J ND <0.30 <0.30 0.041 J ND ND ND ND ND

* * <4.0 <4.0 ND ND ND ND ND ND

* ND ND <0.50 ND NS NS ND NS NS

* 21.3 <15 <15 ND ND ND 3.2J ND ND

107 103 100 88 84.3 73.7 80.5 0.408J ND ND

* * <5.0 <5.0 ND 5 1.7 ND 5 1.8

* * <0.0040 <0.0040 ND ND ND ND ND ND

0.83 * 1.4 0.82 1.2 1.0 1.2 ND ND ND

30 33.2 37 29 31.8 28.1 32.4 ND ND ND

219 239 220 240 230 236 241 ND ND ND

* * ND ND ND ND ND ND ND ND

400 551 430 370 370 370 408 ND ND ND

301 316 320 300 285 288 282 ND ND ND

0.29 * <1.0 <1.0 0.141J 0.20 ND 0.069J ND ND

* * NA NA NA * * NA * ND

* * NA NA NA * * NA * ND

* * NA NA NA * * NA * ND

* * NA NA NA * * NA * ND

0.91 ND <1.0 <1.0 0.553 ND ND 0.180J ND ND

* * <0.050 0.057 ND ND ND ND ND ND

Comments Class GA = NYSDEC Standard for Groundwater MG/L = Miligrams per Liter (PPM) None= Not Applicable, no established Class GA Standard for this compound TOC = Total Organic Carbon. The appropriate test method requires that TOC analysis be performed 4 consecutive times per sample

TABLE 3

INORGANIC METALS

ANALYTICAL RESULTS

MW-1

Parameter NYSDEC MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1 MW-1

Metals Class MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L GA 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16 5/9/18 6/19/20 9/23/20 9/29/21 12/29/22 12/12/23 12/5/24

MG/L * * * * * * * * * * * * * * * Routine Routine Routine Aluminum 0.10 191 ND 0.0113 J 0.0116 ND 0.00592 0.0216 0.313 0.0328 0.00692 0.0268 0.0193J ND NA NA ND ND ND Antimony 0.003 * ND * * ND * * * * * * * ND NA NA ND ND ND Arsenic 0.025 0.184 J ND * * ND * * * * * * * ND NA NA ND ND ND Barium 1.0 3.16 ND 0.0442 J 0.055 0.0468 * * * * * * 0.0525 0.053 NA NA 0.04068 0.047 0.045 Beryllium 0.003 0.00528 ND * * ND * * * * * * * ND NA NA ND ND ND Boron 1.00 * ND 0.0284 J 0.0383 0.028 * * * * * * * 0.080 NA 0.066 0.0413 ND ND Cadmium 0.005 0.0299 ND * * ND * * * * * * * ND ND NA ND ND ND Calcium None 401 J 72 74.9 J 81.3 71.5 * * * * * * 79 86.7 75 71 61.2 73.9 0.0689 Chromium 0.050 0.232 J ND * * ND * * * * * * 0.00532 ND NA NA ND ND ND Cobalt 0.005 0.559 J ND * * ND * * * * * * * ND NA NA ND ND ND Copper 0.20 1.33 ND * * ND * * * * * * * ND NA NA ND ND ND Iron 0.30 410 J ND ND ND 0.0259 0.401 ND 0.726 0.0736 0.0287 0.0492 * 0.076 ND 0.055 ND ND ND Lead 0.025 0.407 J ND * * ND * * * * * * * ND ND ND ND ND ND Magnesium 35.0 293 J 31 30.5 33.8 29.4 36.5 31.4 29.6 35.9 33.3 35 32.7 30.8 33 28 24.6 28.9 0.0283 Manganese 0.30 70.9 D ND ND ND 0.0023 0.0125 ND 0.0292 0.0063 0.00179 0.00385 0.00176J 0.031 0.0081 0.029 0.00503 ND ND Mercury 0.001 0.00038 ND 0.00008 J * ND * * * * * * * ND NA NA ND ND ND Nickel 0.10 1.14 J ND * * ND * * * * * * * ND NA NA ND ND ND Potassium None 78 J 5.8 4.39 5.02 4.76 * * * * * * 5.05 4.2 4.7 4.5 4.14 4.4 0.0047 Selenium 0.01 0.0185 ND 0.00529 J * ND * * * * * * 0.00959J ND NA NA 0.00230J ND ND Silver 0.05 ND ND * * ND * * * * * * * ND NA NA ND ND ND Sodium None 31 J 24 28.3 34.9 28.4 32.2 26.3 26 36.8 34 32.5 40.9 42.2 35 33 32.5 36.0 0.0386 Thallium 0.001 * ND ND ND ND ND ND ND 0.00004 ND ND * ND NA NA ND ND ND Vanadium 0.014 0.486 J ND * * ND * * * * * * * ND NA NA ND ND ND Zinc 2.0 0.921 ND * 0.0333 0.0117 * * * * * * 0.00577J ND NA NA 0.01057 ND ND

Comments Class GA = NYSDEC Standard for Groundwater Results expressed as mg/L, miligrams per liter (PPM) NS = Not Sampled, this parameter not included with Routine Analysis None = Not Applicable, no established Class GA Standard for this compound

TABLE 3

INORGANIC METALS

ANALYTICAL RESULTS

Parameter NYSDEC Metals Class

GA

MG/L

Aluminum 0.10 Antimony 0.003 Arsenic 0.025 Barium 1.0 Beryllium 0.003 Boron 1.00 Cadmium 0.005 Calcium None Chromium 0.050 Cobalt 0.005 Copper 0.20 Iron 0.30 Lead 0.025 Magnesium 35.0 Manganese 0.30 Mercury 0.001 Nickel 0.10 Potassium None Selenium 0.01 Silver 0.05 Sodium None Thallium 0.001 Vanadium 0.014 Zinc 2.0

MW-2

MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2 MW-2

MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16 5/9/18 6/19/20 9/23/20 9/29/21 12/29/22 12/12/23 12/5/24

* * * * * * * * * * * * * * * Routine Routine Routine 359 J ND 0.638 ND ND 0.61 0.01 0.0345 0.028 0.0197 0.00599 0.0193J NS NA NA 0.00364 J ND NS

* ND * * ND * * * * * * * NS NA NA ND ND NS

0.243 J ND * * ND * * * * * * * NS NA NA ND ND NS

2.25 J ND 0.03160 0.06130 0.0212 * * * * * * 0.0184J NS NA NA 0.02060 0.026 NS

0.00822 J ND * * ND * * * * * * * NS NA NA ND ND NS

NS ND 0.00983 0.0192 0.00694 * * * * * * * NS NA ND 0.0083J ND NS

0.0491 J ND * * ND * * * * * * * NS ND ND ND ND NS

1040 D J 42 58 0.0814 34.8 * * * * * * 36.7 NS 52 78 42.1 49.5 NS

0.463 J ND * * ND * * * * * * <0.0011 NS NA NA ND ND NS

0.717 J ND * * ND * * * * * * * NS NA NA ND ND NS

2 J ND * * 0.0021 * * * * * * * NS NA NA ND ND NS

657 J ND 1.25 ND 0.0458 1.49 ND 0.183 0.107 0.0759 0.0914 * NS ND 12 ND ND NS

0.698 J ND * * ND * * * * * * * NS ND 0.0093 ND ND NS

572 J 17 23.4 34.9 13.6 19.3 18.1 16.8 19 19.5 21.5 15.8 NS 21 36 18 20.0 NS

27.8 J ND 0.0216 0.00325 0.00559 0.052 0.00645 0.00347 0.00376 0.00398 0.0478 <0.0017 NS 0.0021 0.13 0.00549 ND NS

0.00042 J ND 0.0009 * ND * * * * * * * NS NA NA ND ND NS

0.992 J ND * * ND * * * * * * * NS NA NA ND ND NS

124 D J 3.6 3.51 4.95 2.48 * * * * * * 1.94 NS 3.5 5.1 1.89 2.2 NS

7.14 J ND * 0.00496 ND * * * * * * 0.0048 NS NA NA ND ND NS

0.0191 J ND * * ND * * * * * * * NS NA NA ND ND NS

21.6 J 15 14 30.9 14.3 14.4 15.2 15.1 15.7 20.5 22.7 16.7 NS 20 14 13.8 12.8 NS

* ND ND ND 0.00322 0.000554 ND 0.000431 ND 0.00005 ND * NS NA NA ND ND NS

0.824 J ND * * ND * * * * * * * NS NA NA ND ND NS

1.88 J ND 0.00721 0.0322 0.0134 * * * * * * 0.00583J NS NA NA 0.01369 ND NS

Comments Class GA = NYSDEC Standard for Groundwater Results expressed as mg/L, miligrams per liter (PPM) NS = Not Sampled, this parameter not included with Routine Analysis None = Not Applicable, no established Class GA Standard for this compound

TABLE 3

INORGANIC METALS

ANALYTICAL RESULTS

Parameter NYSDEC Metals Class

GA

MG/L

Aluminum 0.10 Antimony 0.003 Arsenic 0.025 Barium 1.0 Beryllium 0.003 Boron 1.00 Cadmium 0.005 Calcium None Chromium 0.050 Cobalt 0.005 Copper 0.20 Iron 0.30 Lead 0.025 Magnesium 35.0 Manganese 0.30 Mercury 0.001 Nickel 0.10 Potassium None Selenium 0.01 Silver 0.05 Sodium None Thallium 0.001 Vanadium 0.014 Zinc 2.0

MW-3 Equipment Blank

MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 MW-3 Equipment Blank

Equipment Blank

Equipment Blank

MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L MG/L 6/29/04 8/25/08 9/9/09 2/24/10 6/2/11 4/30/15 7/29/15 10/22/15 1/28/16 6/16/16 10/6/16 5/9/18 6/19/20 9/23/20 9/29/21 12/29/22 12/12/23 12/5/24 12/29/22 12/12/23 12/5/24

* * * * * * * * * * * * * * * Routine Routine Routine Routine Routine Routine 158 ND 0.16 0.0574 ND 0.0176 0.0209 0.0793 0.0424 0.0095 0.00694 0.0217J ND NA NA 0.00447 J ND ND ND ND ND

* * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

0.275 J * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

2.25 * 0.0521 0.0224 0.054 * * * * * * 0.0502 0.053 NA NA 0.04936 0.051 0.049 ND ND ND

0.00499 J * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

* * 0.019 ND 0.0171 * * * * * * * 0.015 NA ND 0.0182J ND ND 0.0023J ND ND

0.0342 * * * ND * * * * * * * ND ND ND ND ND ND ND ND ND

344 J 79 72.6 37.5 71.1 * * * * * * 69.9 72.1 73 71 66.8 67.2 0.0663 0.0466J ND ND

0.181 J * * * ND * * * * * * 0.00396J ND NA NA ND ND ND ND ND ND

0.387 J * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

1 * * * ND * * * * * * * ND NA NA ND ND ND 0.00081 ND ND

543 0.18 0.74 0.11 0.0339 0.332 ND 0.614 0.251 0.0434 0.0311 * 0.024 ND ND ND ND ND ND ND ND

0.462 J * 0.00351 * ND * * * * * * * ND ND ND ND ND ND ND ND ND

239 J 35 30.4 15.4 30.4 34.8 33.9 29.4 38.2 41.7 34.4 30.6 29.4 33 29 28.8 29.2 0.0283 ND ND ND

63.6 D 0.015 0.0702 0.0239 0.00545 0.00786 0.0164 0.0301 0.0288 0.00754 0.00504 0.00247J 0.0085 0.0038 0.0022 0.00403 ND ND ND ND ND

0.00014 J * 0.00006 * ND * * * * * * * ND NA NA ND ND ND ND ND ND

0.894 J * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

65.2 J 6.6 4.62 2.14 4.9 * * * * * * 4.74 4.5 5 5.1 4.38 4.8 0.005 ND ND ND

0.0222 * * ND ND * * * * * * 0.00833J ND NA NA 0.00308J ND ND ND ND ND

ND * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

27.1 J 31 26.2 9.43 32.7 35.2 36.5 30.7 41.6 35.8 40.2 36.9 40.9 45 43 39.8 45.7 0.0441 ND 1.1 ND

* ND ND ND 0.00405 ND ND ND ND 0.00055 ND * ND NA NA ND ND ND ND ND ND

0.394 J * * * ND * * * * * * * ND NA NA ND ND ND ND ND ND

0.945 0.013 0.00772 0.0358 0.0121 * * * * * * 0.00665J ND NA NA 0.00925 ND ND 0.00918J ND ND

Comments Class GA = NYSDEC Standard for Groundwater Results expressed as mg/L, miligrams per liter (PPM) NS = Not Sampled, this parameter not included with Routine Analysis None = Not Applicable, no established Class GA Standard for this compound

TABLE 4 - Volatile Organics Analytical Results

Samples Received by Alpha on 9-Dec-24

LOCATION

MW-01 MW-02 MW-03

Equipment Blank

SAMPLING DATE 5-Dec-24 5-Dec-24 5-Dec-24 5-Dec-24 Lab Sample ID Units Units Units Units

SAMPLE QUALIFIER

PARAMETER

1,1,1,2-Tetrachloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,1,1-Trichloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,1,2,2-Tetrachloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,1,2-Trichloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,1-Dichloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,1-Dichloroethene ND ug/l NS ug/l ND ug/l ND ug/l 1,2,3-Trichloropropane ND ug/l NS ug/l ND ug/l ND ug/l 1,2-Dibromo 3-Chloropropane ND ug/l NS ug/l ND ug/l ND ug/l 1,2-Dibromoethane ND ug/l NS ug/l ND ug/l ND ug/l 1,2-Dichloroethane ND ug/l NS ug/l ND ug/l ND ug/l 1,2-Dichloropropane ND ug/l NS ug/l ND ug/l ND ug/l 1,4-Dichlorobenzene ND ug/l NS ug/l ND ug/l ND ug/l 2-Butanone (MEK) ND ug/l NS ug/l ND ug/l ND ug/l 2-Hexanone ND ug/l NS ug/l ND ug/l ND ug/l 4-Methyl-2-pentanone (MIBK) ND ug/l NS ug/l ND ug/l ND ug/l Acetone ND ug/l NS ug/l ND ug/l ND ug/l Acrylonitrile ND ug/l NS ug/l ND ug/l ND ug/l Benzene ND ug/l NS ug/l ND ug/l ND ug/l Bromochloromethane ND ug/l NS ug/l ND ug/l ND ug/l Bromodichloromethane ND ug/l NS ug/l ND ug/l ND ug/l Bromoform ND ug/l NS ug/l ND ug/l ND ug/l Bromomethane ND ug/l NS ug/l ND ug/l ND ug/l Carbon Disulfide ND ug/l NS ug/l ND ug/l ND ug/l Carbon Tetrachloride ND ug/l NS ug/l ND ug/l ND ug/l Chlorobenzene ND ug/l NS ug/l ND ug/l ND ug/l Chloroethane ND ug/l NS ug/l ND ug/l ND ug/l Dichloromethane (Methylene Chloride) ND ug/l NS ug/l ND ug/l ND ug/l Ethylbenzene ND ug/l NS ug/l ND ug/l ND ug/l Iodomethane ND ug/l NS ug/l ND ug/l ND ug/l Styrene ND ug/l NS ug/l ND ug/l ND ug/l Tetrachloroethene ND ug/l NS ug/l ND ug/l ND ug/l Toluene ND ug/l NS ug/l ND ug/l ND ug/l Trichloroethene ND ug/l NS ug/l ND ug/l ND ug/l Trichlorofluoromethane ND ug/l NS ug/l ND ug/l ND ug/l Vinyl Acetate ND ug/l NS ug/l ND ug/l ND ug/l Vinyl Chloride ND ug/l NS ug/l ND ug/l ND ug/l cis-1,2-Dichloroethene ND ug/l NS ug/l ND ug/l ND ug/l cis-1,3-Dichloropropene ND ug/l NS ug/l ND ug/l ND ug/l m,p-Xylenes ND ug/l NS ug/l ND ug/l ND ug/l o-Xylene ND ug/l NS ug/l ND ug/l ND ug/l trans-1,2-Dichloroethene ND ug/l NS ug/l ND ug/l ND ug/l trans-1,3-Dichloropropene ND ug/l NS ug/l ND ug/l ND ug/l trans-1,4-Dichloro-2-butene ND ug/l NS ug/l ND ug/l ND ug/l

FIGURE

MW-01

MW-03

MW-02

Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AeroGRID, IGN, and the GIS User Community

Town of Amenia, Dutchess County, New York

MONITORING POINT

LOCATION MAP

¹

Fig . 1

Feet

Taconic DDSO Campus Landfi l l 2022 Annual Post-Closure

Monitoring Report

Legend

Monitoring Well

APPENDIX 1:

Annual Leachate Tracking Charts

APPENDIX 2:

Field Forms

GROUNDWATER SAMPLING WORKSHEET

PROJECT NAME: OPWDD Taconic DDSO LF

Project Number:

Site Location: Taconic Landfill, Wassaic, NY

Sample Date: 12/5/2024

Weather: Cloudy, 37 degrees F

Personnel:

GROUNDWATER SAMPLE POINT

Well Number: MW-01

Location:

Casing Diameter: 2"

Well Dia. Volume/Foot

Depth to water, below top of casing: 7.5 1" = 0.041 gal/foot

Depth to bottom of the well: 17.1 2" = 0.163 gal/foot

Length of water column in well: 9.6 4" = 0.653 gal/foot

6" = 1.469 gal/foot

8" = 2.611 gal/foot

Volume of water in well casing, gallons: 1.56

3 Well volumes (= length water column X gal/foot X 3): 4.69

Actual volume purged prior to sampling: 4.75

Sampling Methodology: Geopump

Sampling Equipment: PINE Peri-Pump

Well Recharged?

Required Analysis:

FIELD PARAMETER MEASUREMENTS

Accumulated Volume Purged in Gallons

Parameter:

Turbidity 4.47 NTU

Temperature 9.2 °C pH 6.98

Conductivity 0.643 SPC ms/cm

Oxygen 9.12 DO mg/L

Salinity

Time sample was collected: 13:30

COMMENTS

22013663A

Justin L. O'Brien

Project Number:

Site Location: Taconic Landfill, Wassaic, NY

Sample Date: 12/5/2024

Weather: Cloudy, 37 degrees F

Personnel:

GROUNDWATER SAMPLE POINT

Well Number: MW-02

Location:

Casing Diameter: 2"

Well Dia. Volume/Foot

Depth to water, below top of casing: N/A 1" = 0.041 gal/foot

Depth to bottom of the well: 11.69 2" = 0.163 gal/foot

Length of water column in well: N/A 4" = 0.653 gal/foot

6" = 1.469 gal/foot

8" = 2.611 gal/foot

Volume…