Page 5 of the PAERAB's Spring 2009 TAPP Contractor Newsletter

from 11 am to 1:15 pm; September 10, 2009 from 11 am to 1:15 pm; December 8, 2009 from 2 pm to 4:15 pm

· “An Improved Understanding of LNAPL Behavior in the Subsurface (LNAPL Part 1),” June 16, 2009 from 2 to 4:15 pm; September 17, 2009 from 11 am to 1:15 pm; December 3, 2009 from 11 am to 1:15 pm

· “LNAPL Characterization and Recoverability (LNAPL Part 2),” June 23, 2009 from 2 to 4:15 pm; September 22, 2009 from 2 to 4:15 pm; December 10, 2009 from

Text Box: The Interstate Technical Regulatory Council (ITRC) has scheduled the following on-line courses: “Enhanced Attenuation of Chlorinated Organics: A Site Management Tool,” June 4, 2009 from 11 am to 1:15 pm; August 13, 2009 from 11 am to 1:15 pm; November 5, 2009 from 11 am to 1:15 pm. “Protocol for Use of Five Passive Samplers,” June 9, 2009 from 2 to 4:15 pm; “In Situ Bioremediation of Chlorinated Ethene-DNAPL Source Zones,” June 11, 2009

11 am to 1:15 pm

· “Quality Considerations for Munitions Response,” July 14, 2009 from 2 to 4:15 pm; November 3, 2009 from 2 to 4:15 pm

· “Survey of Munitions Response Technologies,” July 16, 2009 from 11 am to 1 pm; November 19, 2009 from 11 am to 1 pm

· “Performance-based Environmental Management,” October 15, 2009 from 11 am to 1:15 pm

and bedrock aquifer units of one of the plumes. The remaining TCE plume areas are to be monitored as the contaminants degrade over time ( monitored natural attenuation) – with 42 years required for AA1 and a maximum of 20 years for AA2. The longer is the duration of treatment the larger is the probability that contaminants will migrate. A total of seven recirculation wells are planned.

Arcadis is currently

Text Box: The remedy chosen by the Army in the May 2009 Feasibility Study for remediation of the TCE groundwater plumes in the Mid-Valley area involves groundwater recirculation and in well aeration to first strip the TCE from groundwater and to then reinject that treated groundwater back into the aquifer. The remedy addresses the TCE plume center of mass in both the unconsolidated

working on the pilot study for the in-well aeration program. Army/Arcadis state that Arcadis is reconsidering various alternatives. This was apparently a topic of a June technical meeting presumably attended by representatives of the US Army, Arcadis and various regulatory agencies. Army/Arcadis has explained that these alternatives are to be evaluated on the basis of the geological information

that is expected to be acquired as a result of the recent installation of two exploratory wells.

CONTINUED ON P. 9

GREEN TECHNOLOGIES POSSIBLE

The USEPA currently has an initiative underway to utilize “green remediation.” Green remediation has several core elements:

· Energy efficiency

· Renewable energy

· Air emission

· Water

· Land

· Ecosystem

· Materials

· Waste

· Stewardship

Mr. Ted Gabel reports that solar panels are under consideration for application at Site 20/24.

Image of Sun emitting light energy to the earth below