DEP Environmental Referral Form, WTC Site

NYC 9/11 Public Portal Document

WTC Environmental Monitoring: Latest Summary « * Page 2 of4

Dioxin - Ten samples were collected from February 19 at various locations in Lower Manhattan. All samples collected were below the ERA Removal Action guidelines (based on a 30-year exposure).

PAHs - A total of 20 samples were collected on February 14 and February 26 at various locations in Lower Manhattan. PAHs were not detected.'

VOCs - Sampling for volatile organic compounds (VOCa) waa conducted on March 7 and March 6 in the direct area of the excavation at ground zero. To protect workers at the work site. EPA takes grab samples of VOCs where smoke plumes have been sighted. The results are snapshote of tire levels at a moment in time. □SHA'S protective standards set a permissible exposure lirrflt (PEL) averaged over an B-hour day.

All samples taken on March 7 and March 8 at EPA's Wash Tent (Wtest & Murray Streets), Austin Tobin Plaza, and the North Tower and South Tower excavation areas either showed no detectable levels of VOCs, or the levels of VOCs did not exceed OSHA standards.

Previous Dully Environmental Monitoring Summaries;

Maron 7, March 6.2002 March 5..2Sg2 March 1-4.2002 February 2B, 2002 February 27.2002 February 26.500^ February 23-25. 2002 February 22.2002 February 21.2002 February 20.2002 February 16-18. 2002 EBbruaryJS. February 14.2002 February 13.: February 12.2002 February 9-11.2002 February 8.2002 February 7.2002 February 6.2002 EebcuaDL5^02 February 2-4.2002 February 1 2002 Januarv31.2002 January 30.2002 Ja,nMarY.29^2.002

January 26.2002 January 24.2002 January 23.2002 January 22.208g January 19-21.2002 January 18,2002 January 17.2002 January 16.2002 January 15.2002

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