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During the week of 5 October 2009, EPA ERRS removal contractors arrived on-site to prepare for removal activities. On the west-side of the facility, EPA contractors mowed grass vegetation, removed small trees, leveled and set foundation pad for two portable connex office buildings, delivered and set the connex office buildings, established work zones, laid gravel paths from contamination reduction zone to support zone to connex buildings, and restaged a mixed pile of concrete, soil, and wood to a roll-off box staging location. EPA contractors also initiated setup of electric utilities to connex building area. In addition, EPA contractors staged projected non-hazardous material drums in the north (attached) building, re-staged projected hazardous material and unknown material drums in the south building to create access pathway, and performed general housekeeping in the facility, including staging debris and sweeping the floor.
On 12 October 2009, in coordination with EPA, START-3 arrived on-site to begin documentation of removal activities and to perform air monitoring. Upon arrival, START-3 performed air monitoring for organic and inorganic vapors and particulates along the perimeter and inside the facility. Pre-container sampling air monitoring results indicated no levels of chemical constituents were detected above background levels.
During the week of 12 October 2009, EPA contractors sampled containers containing neutral, caustic, and corrosive solid and liquid chemicals and chemical wastes in Level B and C PPE, as appropriate. Level B sampling operations of caustic and corrosive materials were facilitated with use of a Cascade supplied breathing air system. Samples were tested on-site and categorized into waste stream compatibility groups and staged accordingly inside the facility until laboratory analysis results are returned for determination of transportation and disposal disposition.
EPA contractors performed routine air monitoring along the perimeter and inside the facility during container sampling and staging operations. Chemical constituents resulting from removal activities were not detected during perimeter air monitoring except at a monitoring station located at the southwest overhead door were vapors were detected to a level of 0.6 ppm. No vapors were detected above background levels at an adjacent, downwind air monitoring station. Particulates were not detected above background levels outside the facility during container sampling and staging operations. Inside the facility, a Multi Rae multiple gas monitor was utilized inside the facility during sampling and staging operations. Vapors were detected with the Multi Rae chlorine sensor to concentrations from 0 to 4 ppm during diesel-fueled forklift operations. Vapors were non-detect before and after operation of the diesel-fueled forklift. The forklift was used to move containers on pallets to staging locations. Concentrations of particulates were detected above background inside the facility during fork lift operations.
Other tasks initiated or completed during this week of on-site removal activities included: arrival and setup of EPA Region 6 Logistical Reconnaissance Vehicle (LRV) for use as a communications hub and command post; completed setup and activation of electricity to connex buildings and EPA LRV; conducted addition housekeeping measures; gained verbal and written agreements of access to adjacent property for future soil sampling operations; and located and flagged core soil sampling locations for soil sampling operations projected to occur in November 2009.
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