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Excavation of contaminated soil continued in excavation areas #1 through #5. A depth of approximately 1 to 8 feet has been removed from each 25 foot square grid. Maps can be found online in the 'documents' section of this web site. The maps are labeled 'Primary and Secondary Excavation Maps.'
As of February 16, 2007 EPA has excavated and stockpiled approximately 6,300 cubic yards of soil for further analysis and waste characterization. To date, EPA has removed approximately 5,800 cubic yards of contaminated soil for off site transportation and disposal. Additionally, EPA has removed approximately 290 tons of contaminated concrete for off site transportation and disposal.
Approximately, 100% of Area #1, 100% of Area #2, 100% of Area #3, 61% of Area #4 and 8% of Area 5 has been confirmed by soil analysis to be below Texas Risk Reduction Program (TRRP) commercial / industrial clean up levels for all contaminants of concern.
Backfill has been placed over excavated areas that have been confirmed below TRRP clean up levels. Approximately, 100% of Area #1, 100% of Area #2, 100% of Area #3 and 50% of Area #4 has backfill in place.
Excavated soils are being stockpiled on Site for further analysis and waste characterization. A plastic sheathing is being used to cover all stockpiles and excavated holes on Site to minimize offsite migration of odors, dust, and the potential for contaminated storm water runoff. A frac tank has been mobilized on Site and will be used for containment and water quality sampling of any potentially contaminated storm water. Approximately 37,000 gallons of storm water runoff was stored in two tanks on Site. This liquid has been sampled and cleared for offsite transportation and disposal to a commercial treatment/deep well injection facility located in Corpus Christi, Texas. Six (6) - 5,000-gallon load (approximately 30,000 gallons total) trucks have been used for the transported and disposal.
To date, 737 particulate and gaseous phase air samples, 107 confirmation of cleanup soil samples, 3 backfill source soil samples, 4 sludge/sediment samples, and 2 water samples have been collected and submitted to a fixed laboratory for analysis. All pesticide particulate and vapors levels on-site and in the surrounding community have been below the site-specific action levels.
An EPA community office trailer is available on Site. A map which will have updated daily information on particulate air monitoring data is being posted next to the entrance of the office railer for the public to stop by and view. This information will also be available in hard copy and electronic format. The office is open to llow community members an opportunity to speak with an EPA representative in person about any questions or concerns they may have about ongoing Site activities. This office has up to date and current information available in both English and Spanish.
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