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Chain of custody form for DEP environmental samples, 2001

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Form documenting the tracking and handling of environmental samples collected by the Department of Environmental Protection.

NYC-WTC_000145695–000145868

Folder label: “NO INFO

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NYC 9/11 Public Portal Document

■ Pre-aeanin«A»m»e Cowen,ration, ot _ _________________________________________________________________________________ __________ Cnit Observable deanbtg Itmes Presence of Asbestos Leant Lead MMf'F ^utn of bfamber Dust_______ Test Cleaned Betongings^^ U^e Microvac Wipe Ranks Rank Rank Rank Rank 5C significant 3A,3A,3B 3 No, 1 couch 3 3 1 6 13 » n»».™i SB,® 2 1 I W SC significant i A,1A,3B 3 No. J couch 4 J 3 9 18 ® sisoffic... MJA J 6 7 ■ » Actoaif 4D significant 2A,2A 2 no, 1 chair & 9 6 4 3 22 ottoman 4C cigoffloaM lA J «..l«Bh 7 4 i W S3 2B minimi 3A I no, 1 couch 5 7 11 1 24 2A minimi noj conch &chair

S sX A 3 yS'"" W S » S S ** * 2B 1 yes W 9 8 8 3$ ntintaai 2A.2A 2 .w/uoach n Cleaning Equipment: lA Basic w/o AFD 2A Intermediate w/HEPA w/o AFD 3A Advanced w/o AFD IB Basic w/AFD 2B Intermediate w/HEPA w/AFD 3B Advanced w/AFD

The visual classification of dust in the apartments was also compared to the ranking for each apartment. There was general agreement between the visual observations and the analytical results in that five of the six units that were classified as having significant dust accumulation ranked in the top six places. This indicates that visual observations of dust is an indicator that contaminants associated with WTC-related dust may be present.

^^Each contaminant per sampling type was ranked based upon the average concentration per unit with the highest average concentration receiving a rank of 1 and the remaining values continued in ascending order up to 12. The ranking for each combination was then summed for each unit to determine which unit had the highest overall concentration of contaminants. The sum of the rankings for each compound per unit indicates that SC contained the highest concentrations of contaminants prior to cleaning. Note that the lower the sum of ranks, the higher the concentration of total contaminants.

Unit 4B is not included in the list of rankings because there were no lead micro vacuum samples collected in this unit As a point of reference, the sum of the ranks for 4B for the asbestos, lead, and MMVF wipe samples totals 27. This indicates that this unit would have placed in the bottom-tier of the rankings.

^In rniits where personal belongings were retained, the items were cleaned and bagged, simulating a situation where no belongings were present.

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NYC-WTC_000145805

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NYC-WTC_000145805Source: NYC Law Department, mirrored locally

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