NYC 9/11 Public Portal Document
Unit 3B Results
Gypsum
Post 1st cleaning - Scope A
Sample ID Matrix Detected Result Comment
9094-A-3B-016 Air ND < 0.008 mg/m3
9094-A-3B-017 Air ND < 0.008 mg/m3
Lead
Before cleaning
Sample ID Matrix Detected Result Comment
9094-M-3B-006 Microvac ND < 4.65 ugffl2
9094-M-3B-007 Microvac ND < 4.65 ug/ft2
9094-M-3B-008 Microvac ND < 4.65 ug/R2
9094-W-3B-002 Wipe ND < 4.65 ug/ft2
9094-W-3B-003 Wipe 11.5 ug/ft2
9094-W-3B-004 Wipe 9.65 ugrtC
9094-W-3B-005 Wipe 0 ug/ft2 Sample lost by laboratory.
Post 1st cleaning - Scope A
Sample ID Matrix Detected Result Comment
9094-A-3B-014 Air 0.225 ug/m3
9094-A-3B-015 Air 0.238 ug/m3
90g4-M-3B-023 Microvac ND < 2.32 ugfll2
9094-M-3B-024 Microvac ND < 2.32 ug/ft2
9094-M-3B-025 Microvac ND < 2.32 ug/ft2
9094-W-3B-019 Wipe ND < 4.65 ug/ft2
9094-W-3B-020 Wipe 61.6 ugZB2
9094-W-3B-021 Wipe 10.9 ug/ft2
9094-W-3B-022 Wipe 7.27 ug/fl2
Post 2nd cleaning - Scope A
Sample ID Matrix Detected Result Comment
9094-W-3B-037 Wipe ug/ft2 Sample was received broken;
not analyzed.
9094-W-3B-038 Wipe ND < 4.64 ug/ft2
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NYC-WTC_000145247
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