Koppers Report

Here's the report on the cleanup at the Koppers site for April:

Status Report – April 2015
Former Koppers Wood-Treating Site
Carbondale, Illinois
Items Performed/Completed Since Previous Report:
 On April 27, 2015, Beazer submitted to USEPA a draft revision of the Human Health Risk Assessment
(HHRA), addressing USEPA’s March 5, 2015 comments.
 On April 28, 2015, ARCADIS (on behalf of Beazer) submitted a letter to USEPA responding to an April
23, 2015 email regarding the potential effects of solar farms on ecological habitat.
 Beazer, USEPA and others participated in corrective action coordination conference calls on April 9 and
23, 2015.
 On April 23, 2015, Beazer, USEPA, and others participated in a conference call to discuss an ecological
risk management approach for the Site.
 Beazer continued post-construction OMM activities (e.g., DNAPL thickness measurements/removal,
CAMU leachate monitoring/removal, Site inspections, etc.). DNAPL removal volumes are
summarized as follows:
RW-23 South Trench Sump North Trench Sump
April 2015 Total (gal): 35 44 26
Cumulative Total (gal): 7,708 18,710 551
Items Anticipated to be Performed/Completed over the Next One to Two Months:
 Beazer will propose a draft scope of a monitored natural recovery (MNR) program for residual impacted
sediment areas.
 Beazer will submit to USEPA a table and figures presenting a summary of various ecological-risk-based
remediation scenarios.
 Beazer will submit additional information requested by USEPA regarding the applicability of potential
ecological risk evaluations to shrews on a Site-wide versus area-specific basis.
 USEPA will provide comments on the October 2008 Draft Groundwater Monitoring Plan and all other
relevant information submitted over the past several months concerning this item.
 USEPA will review the April 27, 2015 draft revised HHRA to confirm the revision addresses USEPA
comments. The HHRA will be finalized pending USEPA’s acknowledgement that their March 5, 2015
comments have been satisfactorily addressed.
 Beazer and USEPA will continue coordinating regarding potential ecological risk with the goal of
identifying an acceptable basis for identifying any remaining areas subject to remediation to address
potential ecological risk.
 Beazer, USEPA and others will continue to participate in corrective action coordination conference calls.
0811512248_C'dale Apr 2015 StatusRpt_051915.doc 2
Status Report – April 2015
Former Koppers Wood-Treating Site
Carbondale, Illinois
Items Anticipated to be Performed/Completed over the Next Two to Six Months:
 Beazer will continue to advance proposed future Site uses, including conservation land use and
commercial solar energy.
 USEPA will conduct a public meeting in Carbondale.
Items that May Cause Delay in Implementing Future Activities and Efforts (if any) to Limit Such
Delays:
 None.