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Village of Garden City Water Department Update on Emerging Contaminants Regulations

Stay informed about the latest regulations on emerging contaminants like 1,4-Dioxane and PFOA/PFOS. Learn about the health effects, treatment technologies, and the actions taken by the Village Water Department.

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Village of Garden City Water Department Update on Emerging Contaminants Regulations

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  1. Village of Garden CityWater DepartmentUpdate on Emerging Contaminants Regulations Dennis M. Kelleher, P.E., Exec. Vice President – H2M architects + engineers James J. Roberts, P.E., Vice President – H2M architects + engineers

  2. Emerging Contaminants 1,4-Dioxane PFOA/PFOS No current specific drinking water standard (Federal or State) First tested by Village in 2015/2016 as part of Unregulated Contaminant Rule 3

  3. 1,4-Dioxane Stabilizer in industrial degreasers Also in personal care products such as soaps, detergents, make-up Health affects of drinking 1,4-Dioxane still being studied Difficult to remove from water Advanced Oxidation Process (AOP) is best available treatment technology Currently falls under the MCL for unspecified organics with MCL of 50 ppb

  4. PFOA/PFOS Used in manufacturing consumer goods – Teflon, stain resistant products Was used in fire fighting foams (airports) Health affect studies indicate risk to humans Granular Activated Carbon (GAC) best available treatment technology – very effective Currently falls under USEPA Health Advisor of 70 ppt

  5. Regulations Status • EPA has decided not to regulate at this time • New York State pushing to set maximum contaminant levels (MCL) • December 2018 – NYS Drinking Water Quality Council recommended MCL to be set at: • 1.0 ppb for 1,4-Dioxane • 10.0 ppt for PFOA and PFOS • July 2019 – NYSDOH published draft regulations that matched Council’s recommendation • Public comment period open until September 22, 2019

  6. Regulations Status (cont’d.) • Once regulations are adopted, water supplier has 60 days to conduct initial sampling (this could be as early as January 2020) • If any sample exceeds MCL, water supplier has 30 days to resample • If resample exceeds, you have an MCL violation (this could be as early as March 2020) CHOICE: • Supply water that exceeds standard and provide public notification (Quarterly?) OR • Stop using well until treatment is provided *NOT MUCH OF A CHOICE! *WE NEED MORE TIME TO INSTALL TREATMENT

  7. Actions Taken By Water Industry • All submitting comments on draft regulations • Requesting additional time (4-year phase-in of MCL) • Requesting more grant money ($3 mil. per year rather than $3 mil. per 5 years) • Preparing a Request For Exemption to MCL • Part of State Sanitary Code that allows for 12-month period to come into compliance • Attendance at October 16, 2019 NYSDW Council Meeting • Reconvening to discuss draft regulations • Possible modifications to approve phase-in MCL

  8. Village Situation • 1,4-Dioxane – 6 wells over 1.0 ppb • PFOA/PFOS – 4 wells over 10 ppt ACTIONS TAKEN BY VILLAGE • Draft comment letters to be sent to NYSDOH • Pilot study for AOP underway at Well Nos. 10 and 11 – Clinton Road Plant • Purchased GAC vessels due to long lead time • Purchase AOP Systems due to long lead time • Proceeding with installing wellhead treatment at Well Nos. 7, 8, 10/11 and 12

  9. Alternatives Evaluated Elimination of impacted wells Blending of wells Drilling new wells Purchasing water from neighboring water supplier Purchasing from NYC

  10. NYC Water System Overview

  11. NYSDOHsubpart_5-1.pdf 5-1.33 Water supply emergency plans. (Effective Date: January 17, 2018) All community water systems that supply drinking water to more than 3,300 people shall submit a water supply emergency plan to the State. The plan shall identify and outline the steps necessary to ensure that potable water is available during all phases of a water supply emergency The water supply emergency plan shall include: Procedures to notify consumers during all phases of a water supply emergency. Criteria and procedures for determining, and the subsequent reporting of, critical water levels or safe yield of the source or sources of water. The identification of existing and future sources of water available during normal nonemergency and water supply emergency conditions. The identification of all available water storage. Available water storage includes source, transmission and distribution system storage. The identification, capacity and location of existing inter-connections. Identification of additional inter-connections needed to provide potable water during a water supply emergency.

  12. Existing Nassau County Interconnections

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