Asbestos Project Notification and Inspection Report, Dec 2002

NYC 9/11 Public Portal Document

^^ts£P“26-200 Fax: Aug 2 2000 100:35 P.OO J 'rP 12:44 PH NIOSH/R-ll FAX NO. 5134587147 f- 1 <t 1 Centers for Disease Control and Prevention National institute for Occupational Safely and Health ■f-

Interim Bulk and Air Sampling Report Wednesday, September 19,2001 _ - ! Investigators from the National Institute for Occupational Safety and Health (NIOSH) collected bulk knd air J samples in areas immediately adjacent to the debris pile and on personnel actively involved in rescue efforts tn the vicinity of the debris pile to characterize potential exposures. Below are the interim sampling results for Wednesday, September 19, 2001 ■!

! Bulk Samples Asbestos • 27 bulk Opies were collected from undisturbed loose material within the restri'Ctc-d area o st samples indicated less than 1% asbestos (two contained between 1 ar. a ascestps) I CfyAittlliite I • 27 bu.. m'lles were collected from undisturbed loose material within ths restricted area )>- iri'les contained quartz, typically in amounts less than 5%, although one .sample v/as as high as 18% quarti c None of the samples contained cristobalite ; 'fiid'; 4 ! a 27 bulk samples were collected from undisturbed loose material within the restricted area o NoiWng of concern was found regarding metal analysis i Air Samples AsbsstQi • 3 personal samples and 3 area air samples were collected by NIOSH investigators o All task-based concentrations were below 0,05 fibci s 'cc as determined by TEM analysis • .Additional air samples were collected by NYDOH contractors (26 personal and 4 area) o Personal sample 8-hour time-weighted average concentrations were below 0.03 fibersv'cc .is determined by PCM 3 personal samples were analyzed by TEM; all were less than 0,004 fibers/cc - I '«■;

Area sample results were below 0 04 fibws^'ce as determined by PCM If I futif/i t/ i • I / air samples were collected for total dust (7 personal and 10 area) o Personal sample 8-hour time-weighted average concentrations were below 1.0 mg/n? 1 o Area sample concentrations were below 1.7 mg/in" f • 17 air samples were collected for metals (7 personal end 10 area) s 0 Nothing o ' concern' was found regarding metal analysis Carbofi A/onoxide • 5 real-time personal brcatliing zone satrplcs were collected for carbon monoxide o All S-hour time-weighted average concentrations were below 3 ppm J o A single peak of 79 ppm wfes observed on a city transit worker ' / •i Ko/aiite Organic; Compounds fP'OCs) • 6 air samples w^re collected on thermal desorption tubes (used as a screening technique) c Compounds identified included benzene, toluene, and polynuclear aromatic hydrocarbons whieJ? have been attributed to products of combustion ' o Concentrafions of VOCs on all samples were well below established limits • 19 air samples were collected with eturc-oal adsorbent tubes o Concentrations of VOCs on all samples were below detectable limits ■» t

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