NYC-WTC_000195848

NYC 9/11 Public Portal Document

Overview of Air Monitoring Plan as of 09/25/01

Zone Asbestos PM Other Work Zone 11 sites (A-S; excluding G, O, Q, R) PCBs, dioxins, furans, metals; all ~2/week, 24 hr samples; PCM/TEM; with ~10-hr sample at about 9 locations (from among 18 sites (See site lists and maps) contract lab. A - S); the exact number and distribution of the (A-S, excluding G, O, Q, R; ERT locations may vary from time to time, but 1-3) nominally include upwind, downwind, and residential sites. More sites may be added VOCs and Freon: 5 samples twice per day, at 3 fixed locations (1 - 3), and 2 varying locations, Operational but ensuring at least 2 in plume and 1 background; (duration depending on expected ERT loading) ERT TAGA

VOCs and Freon, as requested by NYFD ERT TAGA

Phosgene, inorganic acids (HCl, H2SO4, HNO3), FID/PID, multi-gas (02, LEL,H2S, SO2, CO), Real time monitoring as needed, daily ERT

Silicates: 2 samples /week at 6 locations (A - S) ERT siting, laboratory, and logistics pending.

VOCs: a single set of 24-liour canister samples

Near Zone Sarne protocol as Work Zone PMj 5 TEOM continuous (except Canal Street) 4 fixed roof-top sites (1-4) NV’SDEC operation (see site list and map) PM,5 24-hour daily filter sample Filters delivered to contract lab (except PMj s at Canal St.), ~4-day o Schedule; expected to be daily by NYSDEC lab turnaround A operational by 9/28 A EPA site setup I NYSDEC/EPA NYSDEC site operation EPA PM,o filter weighing o

I o / us

NYC-WTC_000195848