PUBLIC MEETING Synthetic Turf Infill Options and Drinking Water Supply Well Head Protection May 22, 2018

Transcription

1 PUBLIC MEETING Synthetic Turf Infill Options and Drinking Water Supply Well Head Protection May 22, 2018

2 INTRODUCTIONS Weston & Sampson Team (Gene Bolinger, Brandon Kunkel, Cass Chroust, Kevin MacKinnon, Michael Moonan, Marie Rudiman) MEETING AGENDA Project Status Update Turf Infill Options Well Head Protection Questions + Comments

3 PROJECT STATUS UPDATE Loker Neighborhood Meeting High School Neighborhood Meeting Design Development Phase

4 SYNTHETIC TURF SYSTEM COMPONENTS

5 Rubber Plastic Natural Organic Minerals/Coated Minerals Wide use, best performance + resiliency Some recycled Perception of toxicity Heavy metals in trace amounts, not releasable Shock pad required with some products Organic Prone to migrating, more maintenance Requires shock pad, higher cost Moisture required to retain resiliency, can freeze May contain pesticides, heavy metals in trace amounts that are releasable Longest life before replacement Less resiliency, harder surface Requires shock pad, higher cost Can be abrasive SYNTHETIC TURF INFILL OPTIONS

6 Wayland High School Athletic Facilities Improvements 2018 SYNTHETIC TURF INFILL OPTIONS

7 RISK = EXPOSURE x TOXICITY Bioavailability of chemicals in synthetic turf fields We will analyze proposed crumb rubber prior to installation Metals Benzothiazole PAHs, SVOCs VOCs Ways we looked at available data to determine if the risks are acceptable Comparison to applicable standards Ingestion of crumb rubber particles (CRP) Dermal contact with CRP and turf bed Inhalation of chemicals that may volatilize from the synthetic field Leaching of chemicals into groundwater We will evaluate data we collect from proposed fields in the same manner TOXICOLOGY OF SYNTHETIC TURF SYSTEMS

8 COMPARISON TO APPLICABLE STANDARDS TOXICOLOGY OF SYNTHETIC TURF SYSTEMS

9 COMPARISON TO SOILS STANDARDS TOXICOLOGY OF SYNTHETIC TURF SYSTEMS

10 EVALUATION THROUGH RISK ASSESSMENT Risk Assessment is a way to estimate potential health risks from exposure to chemicals Risk = Exposure x Toxicity Conclusion: Potential Risks are an Acceptable Exposure/Negligible Exposure Residential Receptor Age 1 through 31 years 30 year exposure TOXICOLOGY OF SYNTHETIC TURF SYSTEMS

11 CONSERVATIVE RISK ASSESSMENT ASSUMPTIONS Maximum detected concentrations were used Subchronic exposure (1 yr old) 2 days/wk/30 weeks Chronic exposure 3 days/wk/30 weeks Exposure through ingestion and dermal contact Ingest 100 mg/kg crumb rubber on each day of exposure Crumb rubber sticking to face, forearms, hands, lower legs and feet Assumes crumb rubber can be ingested like soil and adheres to skin like soil. Reality: far less exposure! TOXICOLOGY OF SYNTHETIC TURF SYSTEMS

12 Existing Site Conditions 1:12,000

13 Existing Site Conditions 1:12:000

14 Surficial Geology 1:12,000

15 Monitoring Well Network (1:3,600)

16 Monitoring Well Network (1:3,600)

17 Pumping Water Level Elevations (2010) 1:3,600

18 AECOM Capture Zone (2010) 1:12,000

19 DEP Approved Zone II 1:24,000

20 DEP Approved Zone II 1:24,000

21 Cross-Section Map

22 Cross-Section A-A

23 Cross-Section B-B

24 Cross-Section C-C

25 T H A N K Y O U!!! Questions + Comments