NYC 9/11 Public Portal Document
Unit 4C Results
Post 1st cleaning - Test 1A
Sample ID Matrix Detected Result Comment
9094-A-4C-012 Air 0.131 ug/m3
9094-A-4C-013 Air 0.195 ug/m3
9094-M-4C-023 Microvac ND < 2.32 ug/fl2
9094-M-4C-024 Microvac ND < 2.32 ug/ft2
9094-M-4C-025 Microvac ND < 2.32 ug/ft2
9094-W-4C-019 Wipe ug/ft2 Sample was not received at
the laboratory.
9094-W-4C-020 Wipe 14.9 ug/ft2 Field blank contamination
(Validation = R).
9094-W-4C-021 Wipe 8.28 ug/ft2 Field blank contamination
(Validation = R).
9094-W-4C-022 Wipe 7.81 ug/ft2 Field blank contaminaBon
(Valldaeon = R).
Post 2nd cleaning - Test 1A
Sample ID Matrix Detected Result Comment
9094-A-4C-026 Air 0.374 ug/m3
Mineral: alpha-Quartz
Post 1st cleaning - Test 1A
Sample ID Matrix Detected Result Comment
9094-A-4C-014 Air ND < 0.004 mg/m3
9094-A-4C-015 Air ND < 0.004 mg/m3
Mineral: Calcite
Post 1st cleaning - Test 1A
Sample ID Matrix Detected Result Comment
9094-A-4C-014 Air ND < 0.016 mg/m3
9094-A-4C-015 Air ND < 0.016 mg/m3
Mineral: Cristobalite
Post 1st cleaning - Test 1A
Sample ID Matrix Detected Result Comment
9094-A-4C-014 Air ND < 0.016 mg/m3
9094-A-4C-015 Air ND < 0.016 mg/m3
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NYC-WTC_000145274
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