Cleanup Progress

Substantial progress has been made since major construction began in 2007 to support the cleanup activities in Bay Shore, specifically in OU-1. Areas of contamination are significantly reduced and continually shrinking as a result of remediation measures. A series of interim remedial measures (IRM) have been implemented in OUs 2, 3 and 4 in advance of the major construction activities at OU-1 dating back to 2000. These IRM activities are continuing today.

Major cleanup activities in OUs 1, 2, 3 and 4 have been completed. In OU-4, an IRM has been designed by National Grid and approved by the New York State Department of Environmental Conservation (NYSDEC) to address remaining coal tar impact at depths up to 10 feet below the ground surface. The final major activity in OU-4 is a soil excavation project, which will take place in the spring and summer of 2011.

Numerous project milestones have been reached since KeySpan (now National Grid) entered into an order on consent with NYSDEC in 1999.

Timeline of Project Milestones

1999	2000
KeySpan (now National Grid) and NYSDEC enter into an order on consent Smith Avenue remediation work begins Brightwaters Yard remediation work Field work for remedial investigation planned	First public meeting (January) Watchogue Creek/Crum's Brook interim remedial measure (IRM) field work Brightwaters Yard chemical oxygen injections
2001	2002
Planning for supplemental remedial investigation Expansion of OU-3 chemical oxygen injections to Community Avenue	Supplemental remedial investigation
2003	2004
Final remedial investigation report	Remedial action plan and record of decision for OU-1 OU-3 soil removal takes place under a temporary movable fabric enclosure OU-4 background soil sampling
2005	2006
OU-2 oxygen system installations begin OU-1 testing for sheet wall installation	First quarterly OM&M report Excavation IRM in south cell of OU-1 paves way for full excavation Requested indoor air monitoring of OU-2 residences begins
2007	2008
Installation of OU-1 barrier wall Excavation of OU-1 begins Excavation of hot spots of contaminated soil in OU-4	OU-1 barrier wall completed OU-1 shallow and deep excavation program completed Three additional oxygen injection lines planned and installed in OU-2 Storm drain rehabilitation project was completed in OU-3
2009	2010
Additional oxygen injection system installed at the tail end of OU-2. Cooper Lane line extended In-situ chemical oxidation injections implemented in OU-4 Long Island Rail Road (LIRR) tracks relocated and excavation of contaminated soils begins in OU-3	OU-1 groundwater treatment facility completed and activated Areas west of barrier wall in OU-1 investigated and remediated, two additional oxygen lines installed OU-3 excavations under LIRR tracks completed, tracks restored