2.1.1 Narrative

During the week of Sept 21^st, site operations were focused on clay capping the north debris cell, addressing drainage areas, removing silt and clay from the sedimentation pond in the southeast corner of the site and planting/watering vegetative cover on the asbestos cell.

Clay capping of the north cell continued with one foot of clay borrowed from the southern perimeter of the site. Approximately 2.5 feet of silt and clay which had flooded the sedimentation pond during the Labor Day storm events, was removed and the pond was thoroughly rolled and compacted. The asbestos cell was seeded and hay was blown over the entire cell to enhance grass growth prior to anticipated rain later in the week. The steeper slopes of the asbestos cell and other areas of the site continue to be seeded and erosion control matting placed to enhance grass growth.

Lockhart, SC received approximately two inches of rain on Thursday and Friday Sept 24^th and 25^th. Overall, site drainage measures held up well. The berm at the top of the landfill face had successfully diverted rain from the face area and the sedimentation pond dam prevented a large amount of silt from flooding that area. A smaller sedimentation pond immediately south of the asbestos cell was flooded and will be redesigned. Measures will be taken to address rain and runoff on the west side of the asbestos cell so that drainage flows readily to the sedimentation pond on the southeast corner of the site. 

START contractors continued daily collection of subsurface air well measurements. Well air readings appear to be consistent with previous weeks. An examination of the laboratory results for air samples taken from the wells suggests that low oxygen results reported by the lab may actually be argon, which the methodology states: "coelutes" with oxygen and is mixed with the oxygen measurement. Since atmospheric levels contain nearly 1% argon, this may suggest the possibility of air infiltration to the subsurface.

2.1.2 Response Actions to Date

• May 25-29: ERRS mobilization, site preparation  (access roads, entrance, trailer, work zones) 
• June 1-2: Grading and wetting burned area
• June 3: First record of no morning smoke observed
• June 3-5: Continue grading and wetting burned area. Moved cover soils from borrow area to burned area
• June 5-26: Continue grading and covering operations.
• June 16: Exhausted stockpile of cover soil at top center of Site
• June 26 Initial cover soil installation completed.
• June 29 Initial six inches of clay cap begun. Completed on July 3rd.
• July 2nd Three additional gas monitoring wells installed to monitor landfill carbon monoxide and temperatures near former burn area.
• July 13-17: Began removal of trees and topsoil from West Ridge Borrow Zone
• July 14: Exhausted Old Yard Stockpile at the south side of the Site
• July 14-17: Begin installation of second 6" clay layer on burn area
• July 20-22: Complete second 6" clay lift on burn area
• July 22: Conducted compaction testing by PSI Inc - 30 of 34 grids passed
• July 23: Begin installation of third clay layer on landfill face area
• July 28: Complete excavation of 3 vertical feet of sediment from detention pond
• July 29: Consultation with Clemson University Extension Office for Soil quality and vegetation
• July 27-31: Continue installation of third clay layer on landfilled face area reaching 90% completion
• Aug 6: Conducted round 2 of compaction testing, 27 of 28 grids passed.
• Aug 14: Completed fourth and final clay layer on the face area
• Aug 12: Begin removal of Knoll Borrow Zone
• Aug 12: Begin initial cover installation on Asbestos Cell
• Aug 17  Initial cover of Asbestos Cell completed
• Aug 29  Final cover of Asbestos Cell completed
• Aug 25  Begin installation of topsoil on former burn area
• Aug 29  Begin installation of vegetative cover on former burn area
• Aug 29  Complete stormwater protection measures on detention pond. 
• Aug 31  Begin grading northeast debris cell
• Sep 17  Complete initial 12-inch soil layer on northeast debris cell
• Sep 18  Complete construction of dams above retention pond and in west stormwater channel
• Sep 25  Clay capping of North Debris Cell 50% complete

• Isolation of burning material by removal and relocation of available fuel path and installation of earthen cover; (ONGOING)
• Isolation of designated asbestos disposal cell through the installation of earthen cover; (COMPLETE)
• Re-grading waste materials and native soils for purpose of cover installation; (ONGOING)
• Installation of temporary measures to prevent off-site migration of dust or contaminants as removal operations are conducted; and, (ONGOING)
• Continue sampling and monitoring, as needed, for site safety purposes and to further delineate or identify contaminants. (ONGOING)

2.2.1.2 Next Steps

1. Complete initial and final clay cover on landfill top, then vegetate
2. Complete topsoil installation on landfill face, then vegetate and install flow interruption devices
3. Vegetate asbestos cell
4. Complete excavation of sediment pond, replace riser stone, and vegetate berm walls
5. Vegetate all remaining exposed areas
6. Water until vegetation established

6.2 Reporting Schedule

New POLREPS will be issued weekly on Fridays for the duration of on-site activities.

Daily photos of site conditions and progress are being posted to the "Images" section of epaosc.org/bennettlandfill. These photos are collected from the same general locations each day.