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2.1.1 Narrative
The GC continues excavating contaminated sediments and bank soils and restoring excavated grids in BRSA 1. Contaminated material is being loaded out from the staging pad for transport & disposal at an EPA approved landfill facility.
2.1.2 Response Actions to Date
The following activities took place during the reporting period:
- Excavation of contaminated soils with confirmation sampling results received from grids 31-36, 38, 47-48, and 53-58 (see table below for results). Grids not included in this sequence were either still awaiting analytical results from the laboratory or required additional excavation to meet cleanup objectives. A total of 43 grids have now been excavated. There are 58 grids in BRSA 1. The target clean-up goal in the riverbank soils is 5 mg/kg total PCBs.
|
BRSA 1
GRID
|
TOTAL ESTIMATED EXCAVATION DEPTH (in)
|
FINAL
CONFIRMATION TOTAL PCBs RESULT (mg/kg)
|
|
31
|
38
|
0.25
|
|
32
|
41
|
0.22
|
|
33
|
42
|
0.58
|
|
34
|
42
|
2.10
|
|
35
|
43
|
1.30
|
|
36
|
46
|
3.10
|
|
38
|
40
|
2.10
|
|
47
|
36
|
ND
|
|
48
|
38
|
ND
|
|
53
|
28
|
0.42
|
|
54
|
17
|
0.54
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55
|
18
|
0.87
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56
|
15
|
0.54
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|
57
|
8
|
3.60
|
|
58
|
22
|
0.41
|
ND = non-detect
- Reconstruction / restoration of excavated grids in BRSA 1 (see attached photo);
- Transport/disposal of approximately 1,402 tons of excavated soils to an EPA approved landfill facility. A total of 2,943 tons of excavated soils have been transported from BRSA 1 for disposal to date;
- Treatment of contact water from contaminated grids and the contaminated soils staging pad in the on site WWTP. Approximately 56,292 gallons were treated during the reporting period. A total of approximately 219,000 gallons have been treated since the start of the project. Sampling results continue to confirm non-detect levels for total PCBs in treated water;
- Daily particulate monitoring (PM10) around the perimeter of BRSA 1 with no detections off site of particulates above the action level of 1.5 mg/m3; and
- Turbidity control measures and monitoring in Kalamazoo River around the BRSA 1 (1 upstream monitor and 2 downstream monitors) with no sustained exceedances of the action level of 50 NTUs above upstream levels.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
See PolRep #1
2.1.4 Progress Metrics
The following materials were managed during the reporting period.
| Waste Stream |
Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
| Cardboard |
solid |
110 lbs |
NA |
recycling |
Otsego Recycling Center
|
| Plastic |
solid |
40 lbs |
NA |
recycling |
Otsego Recycling Center |
| Contaminated soil (< 50 ppm PCBs) |
solid |
1401.87 tons |
various |
disposal |
Republic Ottawa County Farms Landfill, Coopersville, MI |
| Contact water |
liquid |
56,292 gal |
NA |
on-site WWTP |
On-site reuse/discharge to Kalamazoo River |
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