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LMDC E-Update 83 Manganese Exceedence at 130 Liberty Street

 
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DMCKEON
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Joined: Mar 17, 2005
Posts: 22572
Location: Staten Island

PostPosted: Fri Feb 20, 2009 9:23 am    Post subject: LMDC E-Update 83 Manganese Exceedence at 130 Liberty Street
From Fri Feb 20, 2009 3:00 am to Sun Feb 22, 2009 2:59 am (included)
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February 20, 2009



Dear Lower Manhattan Resident



Late last night we were notified of an exceedance for Manganese at Station 4 (Street level NW corner) on Friday, February 13, 2009. The concentration on Feb 13 was 539 nanograms per cubic meter (ng/m3). The site specific Trigger and Target Concentrations for Manganese are 500 ng/m3.



The Federal Environmental Protection Agency was immediately notified.



Our Environmental consult believe that the source of this exceedence is the same that caused the Manganese exceedance at Station 4 on February 9 and 10, 2009 (basement welding operations, local truck traffic, 130 Cedar Street work activities and other area work). Relevant data is being gathered to confirm this fact. Once this is confirmed we will send out an update.



Per discussions with the EPA, welding activities in the basement will remain suspended pending submission and Regulatory approval of a welding emission control plan. EPA has confirmed that work not associated with the exceedance may continue.
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