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2.1.1 Narrative
Begining of PCB cleanup and further assessment of diesel in soil and groundwater.
2.1.2 Response Actions to Date
TUESDAY April 16, 2013: Personnel on-site: SERAS – 1: SERAS Grossman arrived on island and began to calibrate equipment and prepare supplies for the arrival of ERT Johnson and the beginning of sampling.
WEDNESDAY April 17, 2013: Personnel on-site: EPA – 1, SERAS – 1: ERT Johnson arrived on site and worked with SERAS Grossman to prepare for groundwater sampling. The results from sample set number two were received from the laboratory.
THURSDAY April 18, 2013: Personnel on-site: EPA – 1, START – 2, USCG – 2, ERRS – 3, SEARCH – 1: ERT and SERAS began groundwater monitor well sampling. By the end of the day, MW -1, MW-3 and MW-4 were sampled and SERAS prepared samples for shipment. Analytical data from sample sets 3 and 4 were received. A portion of the ERRS crew, START personnel and OSC Rogow mobilized back to the site to begin re-excavation. USCG personnel and archeologist also arrived on site. Both the areas in need of re-excavation and the areas which were below the action level were marked and areas for re-excavation were lined out. Excavation of the contaminated areas continued, in sample areas 31, 40 44 and 45. The archeologist oversaw and directed excavation in this area and documented the structures as excavation and unearthing continued. By the end of the day, 18 boxes of soil were filled, for a total of 166 boxes to date. Container #10 was completed, and container #11 begun. START collected re-excavation sampling in areas that were completed. The crane which moves containers to and from the barge is broken and therefore it is unclear when the container ship will arrive and when the full boxes will be able to be transported off site for shipment to the mainland.
FRIDAY April 19, 2013: Personnel on-site: EPA – 1, START – 2, USCG – 2, ERRS – 3, SEARCH – 1: ERT worked with OSC Rogow and ERRS to identify and excavate test pits in the areas where more information needed to be obtained about the oil spill source and in an effort to mitigate the ongoing discharge from the facility. The archeologist oversaw and directed excavation in at test pits and documented anything encountered. The archeologist met with HPO who provided clarification that metal and brick structures could be placed back in the excavation area. ERRS deconned the excavator and began to place clean rock and concrete back into clean areas. ERRS coordinated with GPPC on backfill slated to begin in the next few days. SERAS shipped off the first round of groundwater samples and START shipped off confirmation samples that were collected the previous day. START worked on an inventory of remaining supplies. USCG worked with ERRS on excavation of a small segment that needed attention.
SATURDAY April 20, 2013: Personnel on-site: EPA – 2, START – 2, USCG – 2, ERRS – 5, SEARCH – 1: ERRS continued to work with ERT on the excavation and backfill of test pits to determine the location of oil and locations for potential response measures. The archeologist oversaw and directed excavation in at test pits and documented anything encountered. Confirmation samples received indicating that excavation is complete based on Pro UCL calculation of mean concentration. Still awaiting confirmation samples on a couple of small areas not expected to change Pro UCL results. ERRS began backfilling of excavation areas where confirmation samples came back clean. OSC Reiner arrived on site, OSC Rogow demobilized.
SUNDAY April 21, 2013: Day off
MONDAY April 22, 2013: EPA – 1, START – 2, USCG – 2, ERRS – 5, SEARCH - 1: ERRS completed backfilling of excavated areas. Several test pits attempted but unsuccessful due to sandy soil conditions causing pits to cave in before reaching groundwater. No further test pit work will be done. START begins packing of equipment and supplies to be shipped to DEQ offices on Saipan.
TUESDAY April 23, 2013: EPA – 1, START – 2, USCG – 2, ERRS – 5: Archeologist demobilized from site due to completion of excavation and test pit work. ERRS decontaminated equipment and loaded it onto transport racks for port personnel to come pick it up. Containers of waste labeled and sealed for shipment, ready for pick-up by port personnel when crane is fixed. 7 coolers of equipment shipped to DEQ.
WEDNESDAY April 24, 2013: ERRS, START, USCG and EPA demobilized from site.
THURSDAY May 2, 2013: Final confirmation samples received, confirming Pro UCL results that indicated mean concentration below the site action level.
MONDAY June 17, 2013: After significant delays due to equipment issues at the Port of Rota, the containers of waste were picked up and transported off-island for disposal.
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
The CNMI Commonwealth Utilities Corporation (CUC) is under a Department of Justice and EPA order to address contamination and other issues at the Rota power plant. CUC requested that EPA undertake the assessment and clean-up of soil and groundwater contamination at the site.
2.1.4 Progress Metrics
Waste Stream |
Medium |
Quantity |
Manifest # |
Treatment |
Disposal |
PCB contaminated soil |
soil |
176 cu yd boxes
(11 shipping
containers) |
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X |
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