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Document / 161 pages

EPA interim final report on WTC background study, April 2003

Machine-extracted title · confidence 100%

Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.

NYC-WTC_000145869–000146029

Folder label: “INTERIM FINAL April 2003

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Scanned page image, NYC-WTC_000145925
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■D o WTC Background Study c o CT o Field Sample Collection Summary o' ■D cn o CD ro 3. cn 03 Quality Control Samples Collected o o Sample Media I Holding Timo From Samples Field Spike Duplicate Total Field o Analytical Parameters Matrix Container Preservative c Date of Sampling Collected Lot blanks Blanks Blanks Samples Samples 3 CD Asbestos Microvacuum 0.45 urn MCEF 25 mm 20°C (None) Unlimited 162 14 28 0 204 Lead Microvacuum 0.8 um MCEF 37 mm 20’0 (None) 6 months 162 14 28 0 204 9x9 inch Cleanroom Asbestos/MMVF Wipe Wipe 20°C (None) Unlimited 146 14 28 0 14 202

Lead 15 X15 cm Ghost Wipes 20’0 (None) 6 months 114 14 14 14** 14 170 7 days to extraction, 40 Dioxins Wipe 3x3 inch cotton gauze 4’0 days to analysis 114 14 14 0 14 156 7 days to extraction, 40 PAHs Wipe 3x3 inch cotton gauze 4“C days to analysis 113 14 14 0 14 155

Total Dust Wipe 15 X 15 cm Ghost Wipes 20°C (None) Unlimited 35 14 14 0 3 66

Silica, calcite, gypsum Wipe 15 X 15 cm Ghost Wipes 2O'’C (None) 28 days 114 14 14 0 14 156

Asbestos/MMVF Air 0.45 um MCEF 25 mm 20°C (None) Unlimited 64 13 28 0 32 137

Lead Air 0.8 um MCEF 37 mm 20“C (None) 6 months 46 14 29 0 14 103

Silica, calcite, gypsum Air 5 um PVC filter 37 mm 20°C (None) 28 days 46 14 28 0 14 102

Asbestos / MMVF Bulk Dust 4 oz. Polypropylene 2O‘’C (None) Unlimited 24 NC NC NC NC 24

Lead Bulk Dust 4 oz. Polypropylene 20°C (None) 6 months 9 NC NC NC NC 9

Dioxins Bulk Dust 125 ml Amber Glass 4'’C 7 days NC NC NC NC NC 0 7 days to extraction, 40 PAHs Bulk Dust 125 ml Amber Glass 4'’C days to analysis NC NC NC NC NC 0

Silica, calcite, gypsum Bulk Dust 4 oz. Polypropylene 20°C (None) 28 days 9 NC NC NC NC 9

NOTES: The information provided in this table represents the number of samples and QC samples collected. It is not an indication of the number of sample analytical results reported since several samples were collected for multiple analytes. NC = QC Sample was not collected due to insufficient material.. * Microvacuum samples were collected as co-located triplicate samples therefore duplicate samples were not collected. ** As recommended in the method, spike samples were prepared and submitted with the wipe samples into the sampling stream for lead analysis only

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NYC-WTC_000145925Source: NYC Law Department, mirrored locally

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