NYC-WTC_000199715

NYC 9/11 Public Portal Document

! Jessies Lsi^tonRA sitrep04-10.wpd

Fresh Kills (Apr 8) - Particulate Monitoring (Dataram)

o Resubmittal: Incorrect logging period was previously presented for Location P-8. o No change in results at the five stations (P-2, P-3, P-5, P-6, and P-8).

Fresh Kills (Apr 9) - Particulate Monitoring (Dataram)

o Nothing of significance reported at five stations (P-2, P-3, P-5, P-6, and P-8) based on daily average concentrations.

Ambient Air Sampling Locations

NYC / ER (Feb 5) - Metals

o 10 samples collected. o Arsenic nominally exceeded the EPA Removal Action level guidelines (based on a 30-year exposure) at Location A. Note: RAL for arsenic is 0.041 ug/m\ o The arsenic concentration at Location A was below the EPA Removal Action level guidelines adjusted to 1-year exposure, the NIOSH REL (2 ug/nT), and the OSHA PEL(10ug/inT o All other metals were either not detected or were below applicable EPA Removal Action level guidelines, OSHA PELs, and the NAAQS for lead. o Note: Elevated levels of chromium identified in the quality control (QC) samples (blanks) indicate that chromium is not present in these air samples at levels sufficiently above those in the control samples to be considered a valid result.

NYC / ER (Mar 10) - Asbestos Monitoring (Particulate Monitoring Stations - ‘Extended Network’)

o Results pending.

NYC / ER (Mar 26) - Asbestos Monitoring (Particulate Monitoring Stations - ‘Extended Network’)

o Results pending.

NYC / ER (Apr 9) - Particulate Monitoring (Dataram)

o Particulate levels noted at Locations L, N, and R were below the OSHA TWA. o Instruments operated approximately 8 hours. o Station L had an average of 25.97 ug/m’ with a maximum reading of

CITY_21MC100_002458722

NYC-WTC_000199716