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Waste Site Cleanup & Reuse in New England

Atlas Tack Corporation Superfund Site
Weekly Remedial Activities Update
Report # 4: July 31 - August 4, 2006

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1. ACTIVITIES PERFORMED DURING THE WEEK OF JULY 31 - AUGUST 4

  • Continued to establish rough grade for the stockpile staging area.
  • Constructed a 200-ft haul road out through the Fill Area to place material for berm construction.
  • Installed a ± 300-lf berm northward along the edge of Boy’s Creek near the culvert under the Hurricane Barrier (west end)
  • Began to shape crushed concrete and brick stockpile.
  • Surveyed final excavation elevations across grid F.
  • Performed stockpile maintenance activities in the temporary stockpile staging with soils excavated from grid F.
  • Provided dust control throughout the site.
  • Continued to monitor Tripp St. and bike path for any loose stone on the paved surfaces.
  • Completed initial round of groundwater sampling from existing monitoring wells

2. PROJECTED ACTIVITIES FOR THE WEEK OF AUGUST 7 - 11 AUGUST

  • Install liner for the stockpile staging area.
  • Place (100) interlocking bin blocks around the southern and eastern limits of the de-watering pad.
  • Remove and consolidate miscellaneous debris stockpiled above grid G.
  • Excavate and stockpile soils from grid G.
  • Receive, place, and compact clean backfill in the excavation areas.
  • Continue to construct on-site haul roads.
  • Complete the installation of the perimeter fence by installing (1) swing gate at the end of Adams St. and (2) personnel gates.
  • Construct Adams Street entrance.
  • Continue to shape crushed concrete and brick stockpile.
  • Continue to survey the extent of excavations and perform survey layout of CID Area.
  • Continue with air monitoring program

3. AIR MONITORING INFORMATION

WESTON monitored for particulate (dust) during intrusive activities performed during this reporting period. WESTON recognizes EPA’s level of concern for “PM10” to caution sensitive groups, including children, the elderly, and people with heart or lung disease, about exposure to coarse dust particles. The PM10 level of concern for sensitive groups is 150 µg/m3 for 24-hour average exposure.

Perimeter Air Monitoring is performed at up to (6) locations throughout a given work day. Readings are collected at 60 second intervals throughout the day and reported as a daily average.

If exceedances are identified, an increased effort of engineering controls (water suppression) will be utilized to adhere to the PM10 level of concern for sensitive groups, 150 µg/m3 for 24-hour average exposure. If engineering controls appear to be inadequate, all on site activities will stop. See analytical results below.

Weekly Dust Monitoring Summary
Week #4: Results for Monday through Friday **

The EPA's PM10 level of concern for sensitive groups is 150 µg/m3 for 24-hour average exposure

Date Pleasant Street (µg/m3) Adams Street (µg/m3) Tripp Street (µg/m3) Egypt Road (µg/m3) Hurricane Barrier (µg/m3) Church Street 1 (µg/m3) Church Street 2 (µg/m3) Church Street 3 (µg/m3) Church Street 4 (µg/m3)
7/31/06 64 28 202* NSC NSC 57 NSC 32 253
8/1/06 2 28 125* NSC NSC 3 NSC 20 30
8/2/06 3 10 126* NSC NSC 18 NSC NSC 31
8/3/06 0 0 154* 0 0 NSC NSC NSC 4
8/4/06 Precip Precip Precip Precip Precip Precip Precip Precip Precip

Notes:
All readings reflect the daily average calculated over the course of the workday.
All readings collected with a Thermo Electron PDR 1000.
NSC: No sampling conducted; No intrusive work conducted in that area.
Precip: No sampling conducted due to precipitation.

*: Elevated readings at Tripp Street are a result of off-site traffic from the two businesses located both east and west of the this entrance. Engineering controls have been utilized to mitigate dust generation within the perimeter of the work area during construction activities. As of 9 August 2006, the PDR 1000 will be relocated and placed approximately 100 ft. to the east of the entrance to avoid any interference from off-site activity.

**: No work and air monitoring occurs on weekend days

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