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FIELD OVERSIGHT SUMMARY
BENNETT'S DUMP
BLOOMINGTON, INDIANA
Reporting Period: September 2001
Tetra Tech EM Inc.
Oversight Personnel: Brian Lenihan
Oct 19, 2001
INTRODUCTION
As requested by the U.S. Environmental Protection Agency (EPA), Tetra Tech EM Inc. (Tetra Tech) is
conducting site visits and environmental sampling at multiple sites (Lemon Lane Landfill, Neal's
Landfill, Winston Thomas Wastewater Treatment Plant, and Bennett's Dump) in Bloomington, Indiana.
Tetra Tech is performing this work for EPA under Contract No. 68-W6-0037, Work Assignment No.
044-ANLA-05ZZ. Viacom, Inc. (Viacom), is the responsible party for the site.
This report summarizes Tetra Tech's oversight observations at the Bennett's Dump site during September
2001. Specifically, Tetra Tech visited the site on the following dates:
Wednesday, September 5, 2001
Tuesday, September 18, 2001
This report also discusses issues and developments. Appendix A contains a photographic log of Tetra
Tech's field activities, and Appendix B contains a copy of Tetra Tech's field notes.
OVERSIGHT OBSERVATIONS
Tetra Tech's activities at Bennett's Dump during September 2001 are summarized below.
Wednesday, September 5, 2001
Tetra Tech arrived at Bennett's Dump at 1:00 p.m. PSARA Technologies (PSARA) was on site
preparing equipment to check well MOO-5 for sheen or product. PSARA purged monitoring wells MW-61
and MW-6D on September 4, 2001. According to PSARA, groundwater is MOO-5 has contained product
or sheen along with high polychlorinated biphenyl (PCB) analytical results. Before purging the well,
PSARA wanted to determine the amount of product, if any, in MOO-5. Tetra Tech observed a sheen on
the surface of the well water inside the surface casing. PSARA lowered a clear, 2-inch-diameter, plastic
bailer down the well to retrieve a water slug. Alter retrieving the slug, PSARA raised the bailer out of the
well. No sheen or product was visible on the groundwater in the bailer. PSARA poured the contents of
the bailer into a carboy for temporary storage. No sheen or product was visible in the groundwater once
the water was placed in the carboy. PSARA lowered the bailer to the bottom of the well to check for
product. After the clear bailer had reached the bottom of the well, PSARA raised the bailer out of the
well. The bottom of the bailer was covered in an oily sheen, and the bailer had recovered some product
inside the bailer. PSARA bailed most of the product off the bottom of the well. The product was
transferred from the bailer to a 55-gallon drum for temporary storage. After removing the product,
PSARA informed Tetra Tech the well would be allowed to stabilize overnight and that PSARA would
return to the site on September 6, 2001, to check for product again. Tetra Tech and PSARA departed the
site at 2:50 p.m.
Tuesday, September 18, 2001
Tetra Tech arrived at the site at 10:30 a.m. PSARA was on site setting up low-flow sampling equipment
at MW-61, a 2-inch-diameter screened well. PSARA used a peristaltic pump to establish a flow rate with
no drawdown. PSARA measured the depth to water in MW-61 at 7.29 feet below ground surface (bgs).
After measuring the depth to water, PSARA began pumping the well at 80 milliliters per minute
(mL/min). Drawdown occurred immediately at this flow rate. PSARA adjusted the peristaltic pump to
30 rnL/min, the slowest flow rate, and still observed drawdown in the well. Once this pumping rate was
established, PSARA recorded the temperature, conductivity, turbidity, and depth to groundwater. When
these field parameters stabilized, the well was sampled. The field measurements are summarized below.
| Time |
Temperature |
Conductivity
(microsiemens/cm |
Turbidity Reading
(NTU) |
Depth to Groundwater
(feet bgs) |
| 11:15 a.m. |
23.1 |
609 |
1.05 |
7.75 |
| 11:25 a.m. |
22.1 |
609 |
0.70 |
7.79 |
| 11:35 a.m. |
21.6 |
608 |
0.71 |
7.87 |
| 11:40 a.m. |
Sample Collected |
Notes:
cm Centimeter
NTU Nephelometric turbidity units
PSARA's sample identification number for the Groundwater sample collected from MW-61 was
BD9219, and Tetra Tech's sample identification number was MW-61.
After sampling at MW-61, PSARA moved to MW-6D, a 2-inch-diameter screened well (see Photograph
No. 1 in Appendix A). PSALM measured the depth to water at MW-6D at 5.16 feet bgs. PSARA used a
peristaltic pump to achieve a pumping rate of 50 ml/min with no drawdown. Once this pumping rate was
established, PSARA recorded the temperature, conductivity, turbidity, and depth to groundwater. When
these field parameters stabilized, the well was sampled. The field measurements are summarized below.
3:50 p.m.Sample Collected
| Time |
Temperature (0C) |
Conductivity (microSiemens/cm) |
Turbidity Reading
(NTU) |
Depth to Groundwater
(feet below ground surface) |
| 3:35 p.m. |
21.6 |
658 |
1.05 |
5.58 |
| 3:35 p.m. |
20.9 |
659 |
0.55 |
5.58 |
| 3:45 p.m. |
20.8 |
661 |
0.48 |
5.61 |
| 3:50 p.m. |
Sample Collected |
Notes:
cm Centimeter
NTU Nephelometric turbidity units
For MW-6D, PSARA's sample identification number was BD9220, and Tetra Tech's
identification number was MW-6D.
The split samples taken by Tetra Tech were shipped to TriMatrix Laboratories in Grand Rapids,
Michigan.
Tetra Tech and PSARA departed the site at 4:50 p.m.
ISSUES AND DEVELOPMENTS
No issues or developments were noted during the reporting period.
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