Draft fact sheet from DOH and DEP addressing tenant concerns regarding asbestos fibers at 105 Duane Street.
NYC-WTC_000125845–000126009Folder label: “105 DUANE STREET Block: 151 Lot: 1 BIN: 1001650 10-16 THOMAS ST1 TRIMBLE ST., TRIBECA TOWER”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document 12/11/2001 17:07 FAX 212 363 8306 ATC fj013
, f D 5755
APPENDIX (Nonmandatory Information) X1. DUST SAMPLE ANALYSIS X1.! See Figs. X l . l and X l .2 for the dust analysis worksheet and the TEM count sheet.
DUST SAMPLE ANALYSIS
Client-. Accelerating Voltage: Sample ID: Indicated Meg: POt Job Number. Screen Meg: 1Ot Date Sample Analyzed: - - Microscope: 1 2 3 4 5 Number of Openings/Grids Counted: Filter Type: Grid Accepted, 600X: Yes No Filter Size: Percent Loading: X Filter Pore Size (pm): Grid Box #t: Grid Opening: 1) Pm x pm 2) Jim x PM
Analyft
Reviewer: Counting Rules: AHERA LEVEL It
Calculation Data: Effective Filter Area in mm2: (EFA) Number of Grid Openings Counted: (GO) Avderage Grid Opening Area in mmi: (GOA) Volume of sample Filtered in ml: M Surface area Sampled in cmz: (SPL) Number of Asbestos Structures Counted: (#STR)
• It the number of asbestos structures counted is less than or equal to 4. enter 4 structures as the limit of detection here.
FORMULA FOR CALCULATION OF ASBESTOS STRUCTURES "DUST' PER CM2:
EFAX X 100 X #STR _ (Asbestos structures per cmz) GO X GOA X VX SPL
Results for Total Asbestos Structures` (9wcttres per ems) Results for Structur s > microns: (Structures per cm3) FIG. X1.1 Dust sample Anslyuls work Sheet 10
NYC-WTC 000125913
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