Daily Field Observation Report

Daily Field Observation Report Project: Chappaqua Station Site Remediation Date: 08/25/2017, Day 50 Project Number: 04736.0002 Report By: Claire Bearden Representative On-Site: NRC, PS&S, LeChase, NYSDEC, JMC Rentals, Cove Rentals, WCD Group, Tectonic Engineering, Carlin & Simpson 1.0 Weather Temperature Humidity Wind Precipitation ** Weather Conditions Low: 59 F High: 77 F Low: 42 % High: 87 % Direction: N / NW Speed: 8 mph (14 mph gusts) N/A Humid (AM), sunny 2.0 Community Air Monitoring Data Summary 2.1 Maximum Observed Background Readings: VOC: 0.0 ppm; PM-10: 267 µg/m 3 Station ID UW / DW VOC 15-Min Avg (ppm)* VOC 15-Min Avg Max (ppm)* PM-10 15-Min Avg (µg/m 3 ) PM-10 15-Min Avg Max (µg/m 3 ) N-74 UW 0.0 0.0 18 43 N-81 DW 0.0 0.0 10 29 S-77 DW 0.0 0.0 5 34 S-79 DW 0.0 0.0 8 32 N-51 DW 0.0 0.0 6 24 E-37 DW 0.0 0.0 8 14 * - Volatile Organics reported in parts per million (ppm) ** - Daily precipitation information obtained from on-site weather station UW Upwind Station DW Downwind Station 2.2 Air Monitoring Equipment Notes: N/A 2.3 CAMP Visual Observations: Visible mist from BioSolve 2.4 CAMP Action Level Alert(s) Triggered (Yes or No): No 2.5 CAMP Action Level Alert Details: See attached CAMP Exceedance Notification Report (if applicable) Enclosed Attachments: Attachment A: Table RA-1: Remedial Action Manifest Attachment B: Odor Assessment Forms Attachment C: Odor Complaints Log \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 1 of 9

3.0 Work Activities Time 08/25/17 0630 0700 0730 0745 0800 0940 1000 1100 1210 1355 1445 1520 1630 1634 1700 Daily Activities NRC continues remedial excavation of area B-2, A-3 PS&S activates off-site CAMP stations NRC- daily safety meeting with on-site personnel PS&S activates on-site CAMP stations WCD Group, NYSDEC on-site First round of JC Transport trucks arrive on-site for pick-up and disposal of excavated material to Clean Earth of Carteret, New Jersey (CECNJ) Refer to Attachment A for full schedule of JC Transport trucks on and off-site NRC applies Rusmar Foam and BioSolve with deodorant continuously throughout duration of excavation Cove rentals on-site throughout day for delivery of ASTM 57 stone (1 load) and structural fill (4 loads) PS&S, NRC perform morning Odor Assessment Tour Refer to Attachment B for Odor Assessment Form NRC staples poly sheeting to all exposed slopes of excavation NRC stops dewatering excavation treating remaining groundwater in tank and demobilizing (next week) NRC places triaxial geogrid along the base of excavation NRC places woven filter fabric over geogrid NRC continues backfilling B-2, A-3 with ASTM 57 drainage stone NRC places structural fill in western end of B-2 / southern end of A-3; uses roller for compaction Second round of JC Transport trucks arrive on-site for pick-up and disposal of excavated material to Clean Earth of Carteret, New Jersey (CECNJ) Refer to Attachment A for full schedule of JC Transport trucks on and off-site NRC applies Rusmar Foam and BioSolve with deodorant continuously throughout duration of excavation PS&S, NRC, NYSDEC conclude additional trucks will be needed to completed extended excavation of B-2 NRC reserved 3 JC Transport trucks for Tuesday morning (8/29/17) to complete extended excavation Tectonic Engineering on-site to survey points for excavator Carlin & Simpson on-site for compaction testing of backfill NRC backfills 36 ASTM 57 stone in northern section of B-2 PS&S, NRC perform afternoon Odor Assessment Tour Refer to Attachment B for Odor Assessment Form PS&S deactivates on-site CAMP stations NRC- daily tailgate meeting and sign out with on-site personnel NRC, PS&S, LeChase, NYSDEC off-site PS&S deactivates off-site CAMP stations \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 2 of 9

TABLE 1 - Daily Materials Tracking FRIDAY AUGUST 25, 2017 Chappaqua Station, LLC Former Chappaqua Coal/Fuel and Humble Oil Site Village of Chappaqua (Town of New Castle), Westchester County, New York NYSDEC BCP Site Number: C360120 Daily Remedial Action Daily Remedial Action Units Remarks Remedial Excavation: Off- Site Disposal ~100 Tons 4 Total Loads Imported Fill Material ~25 ASTM 57; ~100 Structural Tons 1 Load ASTM 57 Stone; 4 Loads Structural Fill TABLE 2 CAMP PID Verification FRIDAY AUGUST 25, 2017 Former Chappaqua Coal/Fuel and Humble Oil Site Village of Chappaqua (Town of New Castle), Westchester County, New York NYSDEC BCP Site Number: C360120 CAMP Station PID Value (ppm) Handheld PID Value (ppm) Notes N-74 0 0 N-81 0 0 S-77 0 0 S-79 0 0 N-51 0 0 E-37 0 0 \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 3 of 9

08/25/2017 Site overview photo View to the north. Photo of NRC continuing excavation of A-3. View to the southeast. \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 4 of 9

Photo of stapled poly sheeting on exposed excavation slopes - View to the southeast. Photo of NRC placing ASTM 57 stone for backfill of B-2 View to the northeast. \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 5 of 9

Attachment A Table RA-1: Remedial Action Manifest \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 6 of 9

Truck Number Table RA-1: Remedial Action Manifest Chappaqua Station, LLC Former Chappaqua Coal/Fuel and Humble Oil Site Village of Chappaqua (Town of New Castle), Westchester County, New York Date Time In NYSDEC BCP Site Number: C360120 Time Disposal Truck Inspection Out Facility Manifest Number Remarks NJ- AT778U 25-Aug 807 821 Completed- CEB CECNJ 1619714 NJ- AT779U 25-Aug 820 840 Completed- CEB CECNJ 1619715 NJ- AT778U 25-Aug 1210 1226 Completed- CEB CECNJ 1619716 NJ- AT779U 25-Aug 1230 1248 Completed- CEB CECNJ 1619717 \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 7 of 9

Attachment B August 24, 2017 Odor Assessment Forms \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 8 of 9

Field Observations Parameter Site: Date: Chappaqua Station Odor Assessment Form Chappaqua Station, LLC - Remedial Action and Excavation Approach Friday August 25, 2017 Observer Location Wind Rating Odor Description/Comments Description of location (Use streets landmarks, addresses, etc.) Direction (Wind Blows From) Orientation (Downwind/Upwind) Approximate Wind Speed Description of odors (e.g. strength & persistence), other source(s) of odors, variable weather, etc. Time (0-3 Rating) Northerly Route 1. 9 Hunts Lane Parking Lot S Downwind < 2 MPH 10:04 0 Slight odor of pavement sealant (parking lot) 2. Site Gate S Downwind < 2 MPH 10:07 0 No Odors Observed < 2 MPH Westerly Route 1.Quaker Street & Hunts Place Intersection S Downwind < 2 MPH 10:09 0 No Odors Observed 2. Site Gate S Downwind < 2 MPH 10:11 0 No Odors Observed Easterly Route 1. King Street & N. Greeley Ave IntersectionS Downwind < 2 MPH 10:17 0 Food odor observed 2. King Street & Allen Place Corner S Downwind < 2 MPH 10:20 0 Food odor observed 3. Allen Place to Bridge Stairs S Upwind < 2 MPH 10:23 0 Asphalt odor observed Additional Notes: 1 Remedial Action Excavation Approach continued from 0807 Hours to 0840 Hours (2 Trucks, First Round) Sketch/Map: Relevant work activities occurring on-site during odor assessment: 1 Stockpiling backfill stone Odor Assessment Team Members: PS&S (Claire Bearden) NRC (Zak Arnhold) Template \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Odor Assessment Report\08252017 (AM) Odor Assessment Form.xlsx

Field Observations Parameter Site: Date: Chappaqua Station Odor Assessment Form Chappaqua Station, LLC - Remedial Action and Excavation Approach Friday August 25, 2017 Observer Location Wind Rating Odor Description/Comments Description of location (Use streets landmarks, addresses, etc.) Direction (Wind Blows From) Orientation (Downwind/Upwind) Approximate Wind Speed Description of odors (e.g. strength & persistence), other source(s) of odors, variable weather, etc. Time (0-3 Rating) Northerly Route 1. 9 Hunts Lane Parking Lot N Upwind < 2 MPH 1520 0 Slight odor of pavement sealant (parking lot) 2. Site Gate N Downwind < 2 MPH 1523 0 No Odors Observed < 2 MPH Westerly Route 1.Quaker Street & Hunts Place Intersection N Downwind < 2 MPH 1525 0 No Odors Observed 2. Site Gate N Downwind < 2 MPH 1527 0 No Odors Observed Easterly Route 1. King Street & N. Greeley Ave IntersectionStagnant Stagnant Stagnant 1532 0 No Odors observed Faint odor from weir tank (cover open to check H 2 0 2. King Street & Allen Place Corner N Downwind < 2 MPH 1534 0 level) 3. Allen Place to Bridge Stairs N Downwind < 2 MPH 1536 0 No Odors observed Additional Notes: 1 Remedial Action Excavation Approach continued from 1210 Hours to 1248 Hours (2 Trucks, Last Round) Sketch/Map: Relevant work activities occurring on-site during odor assessment: 1 Compaction of backfill Odor Assessment Team Members: PS&S (Claire Bearden) NRC (Zak Arnhold) Template \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Odor Assessment Report\08252017 (PM) Odor Assessment Form.xlsx

Attachment C August 24, 2017 Odor Complaints Log \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Daily's\2017-0825 - Daily Field Report.docx Page 9 of 9

Community Odor Complaints Log Chappaqua Station NYSDEC Site #C360120 Village of Chappaqua (Town of New Castle), Westchester County, New York A. CERP - CS Complaint Initial Log B. Odor Assessment Team Response Odor Complaint Number Date Time Complainant Name Complainant Contact Person Location of Odor Complaint Weather Conditions Site Work at Time of Odor Complaint Odor Assessment Team Tour Time Odor Assessment Team Tour Observations Odor Assessment Team Odor Complaint Action (Closed or Open/Action Required) 1 8/18/2017 9:00 AM William Wedge 1 PM HOTLINE N/A 8/18/2017 48 Prospect Drive 914-658- 3255 Construction Entrance 2 8/18/2017 4:03 PM Ed Frank 845-661-5183 Saw Mill Off-Ramp 9 AM HOTLINE N/A 8/20/2017 1 PM HOTLINE N/A 8/20/2017 4 PM HOTLINE N/A 8/20/2017 3 8/21/2017 7:07 AM William Wedge 1 PM HOTLINE N/A 8/21/2017 4 PM HOTLINE N/A 8/21/2017 48 Prospect Drive 914-658- 3255 Construction Entrance Overcast, Humid, High of 86 o Fahrenheit Overcast, Humid, High of 86 o Fahrenheit 0700 Hours (7 AM): Clear Skies, High of 75 o Fahrenheit Remedial Action Excavation in Area B-1 and Direct Load-Out of Trucks. Biosolve and Foam Application in accordance with the Revised Remedial Action Excavation Approach. Remedial Action Excavation in Area B-1 and Installation of Construction Dewatering Sump No Site Work at 0700 Hours; Project Team Safety Brief and Review of Day's Site Operations Meeting. Site Intrusive Work commenced at 0800 Hours 0830 Hours to 0900 Hours 1530 Hours to 1600 Hours 0915 Hours to 0942 Hours "0" Odor Assessment Tour; No Odors Observed at the ; On-Going Remedial Action Site Perimeter Excavation with Rusmar Foam and Biosolve Application Assessment Tour; No Odors Observed at the ; On-Going Remedial Action Excavation with Rusmar Foam and Biosolve Application "0" Odor Assessment Tour; No Odors Observed at the ; On-Going Remedial Action Site Perimeter Excavation with Rusmar Foam and Biosolve Application Odor Complaint was received after the 4 PM Monday, August 21, 2017 Hotline Check and before the 9 AM Tuesday, August 22, 2017 Hotline Check. Please note that the "Easterly Route" Odor Assessment Tour was performed from 1526 Hours to 1532 Hours on Monday, August 21, 2017 along the Allen Place parking lot and no odors were observed. 4 8/21/2017 4:32 PM Linda Frank 845-661-3641 N/A 8/22/2017 9 AM HOTLINE N/A 8/22/2017 1 PM HOTLINE N/A 8/22/2017 4 PM HOTLINE Parking lot in front of train station 1500 Hours (3 PM): Partly Cloudy, High of 85 o Fahrenheit Remedial Action Excavation Backfill in Area B1 1510 Hours to 1532 Hours ; On-Going Remedial Action Excavation with Rusmar Foam and Biosolve Application. EDITORIAL NOTE: In accordance with the "Train Station Parking Lot Resurfacing - August 21-25, 2017" Notice "0" Odor that was posted inside the Chappaqua, New York train Assessment Tour; station; the asphalt pavement parking lot resurface No Odors activities commenced on Monday, August 21, 2017 and Observed at the these "asphalt pavement parking lot resurfacing Site Perimeter activities" will result in odors. N/A 8/23/2017 N/A 8/24/2017 N/A 8/24/2017 N/A 8/24/2017 9 AM HOTLINE 1 PM HOTLINE 4 PM HOTLINE OdorComplaintLog \\psands.aec\projectdata\projects\04736\0002\reports\environmental\chappaqua RA Oversight\Field Reports\Odor Complaints Log\08252017 Odor Complaint Log (08222017PSSUpdate).xlsx