Waste Site Cleanup & Reuse in New England
Atlas Tack Corporation Superfund Site
Weekly Remedial Activities Update
Report # 3: July 24 - July 28, 2006
1. ACTIVITIES PERFORMED DURING THE WEEK OF JULY 24 - JULY 28
- Continued to establish rough grade for the stockpile staging area
- Improved Tripp St. by installing geotextile, 4-8-inch rip rap, and ¾-inch stone.
- Improved existing decontamination pad
- Installed additional silt fence along grids F and G.
- Surveyed existing elevations across grids F and G.
- Constructed temporary stockpile staging area for the placement of soils originating from grid F and G.
- Began to excavate a 2-ft cut across grid F, approximately 100 CY was excavated and stockpiled in the temporary stockpile staging area located east of WESTON’s office trailer.
- Provided dust control
- Collected (3) additional backfill soil samples from potential burrow sources.
2. PROJECTED ACTIVITIES FOR THE WEEK OF JULY 31 - AUGUST 4
- Establish final grade in the stockpile staging area.
- Install 4-inches of asphalt binder for the 400-ft X 100-ft soils dewatering pad.
- Excavate and stockpile soils (2,300 CY) from grids F and G located in the northeast corner of the Commercial Area.
- Backfill excavation areas.
- Perform groundwater sampling round on (18) monitoring wells.
- Construct on site haul roads.
- Install a ± 300-lf berm northward along the edge of Boy’s Creek near the culvert under the Hurricane Barrier (west end) tying into an elevation of approximately 6 to 7 feet at the Fill Area.
- Complete the installation of the perimeter fence by installing (1) swing gate at the end of Adams St. and (2) personnel gates.
- 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 #3: 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)|
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