February 21, 2017
The remedial excavation at the first of 10 source areas, SA-2, was completed on Monday, February 13th. Work at SA-2 began on Wednesday, Feb. 8th with about 70% of the approximately 36 ft. x 20 ft. area being completed on Day 1. The work was completed on Day 2 (2/13), as no site work could be conducted on Feb. 9th and 10th due to the snow. SA-2 was excavated to a depth of 15 ft. below grade (total volume of ~ 400 cy). Soils removed from SA-2 were direct-loaded onto trucks for off-site disposal
The SA-2 work was completed in accordance with the RAWP and the SA-2 scope that was finalized after NYSDEC and HDR review and comment. The five (5) CAMP monitors were all active on Feb. 8th and Feb. 13th, and no elevated levels were observed during those days. Monitoring in and around the SA-2 excavation work area – with NYSDEC and HDR staff being present on-site – also did not note anything unusual in terms of instrument readings, odors, or visual observations indicative of potential ‘source material’. Endpoint samples were collected from the SA-2 pit and sidewalls.
Currently, the Contractor is prepping the site for additional source area work, including importing materials and screening on-site surface soils for possible use as backfill for SA-2 and other source areas. As this latter activity is considered to be intrusive work (even though the surface soil screening is only to depths of approximately 6” to 2 or 3 ft. below grade), air monitoring at these work locations and the five (5) CAMP stations will remain active.
NYSDEC, HDR and the Village Building Inspector have approved remediation of all other Source Area removal with the same parameters outlined in the approved SA-2 Scope of Work. The approved Scope of Work for the remaining Source Area removal is attached.
February 7, 2017
After a thorough review by the NYS DEC and a subsequent analysis by Village's Environmental Engineering Firm (HDR), permission will be provided to begin Source Area-2 excavation (the first hotspot soil removal) to Peak Construction Group in accordance with the approved Remedial Action Work Plan (RAWP) and NYS DEC and Village approved Source Area 2 Scope of Work. (file attachment on Village website)
Work will only be allowed to commence after a mandatory onsite meeting with representatives from the NYS DEC, Village Building Department and Village Environmental Consulting firm HDR, Inc., developer Environmental Consultant HydroEnvironmental Solutions, Inc. and developer construction management Peak Construction Group. This meeting has been tentatively scheduled for Wednesday, February 8th.
As specified in the work plan, the CAMP monitoring will be conducted between the work area and the property boundary. The CAMP stations will include a photoionization detector (PID), and a real-time particulate monitor (Dust monitor). A total of five CAMP monitoring stations will be in operation. Two of which will be placed downwind outside the work area, one upwind of the work area, one will be placed between the work area and the nearest occupied building, and a fifth monitoring station will be located between the site and Waverly School. In addition, air monitoring will be conducted at the excavation area with a 4-gas meter, a PID, and a flame ionization detector (FID).
Water and spray foam will be on available on site should dust and/or VOC/odor control become necessary during this work. The spray foam was tested on January 25, 2017 to ensure contractors are familiar with application techniques.
The NYS DEC has provided comment and opinion on alternative air monitoring methods proposed by the community (see DEC memo attached and on Village website).
Subsequent to this, HDR has analyzed the DEC's comments and concurs with the DEC’s position on the proposed methods.
Representatives from NYS DEC and/or the Village's Environmental Consulting firm will be on-site during all intrusive and remediation activities.