Draft special investigative audit report on environmental data from the World Trade Center site prepared by IT Corporation.
NYC-WTC_000130438–000130515Folder label: “E-Mail 1/2/02”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
RESULTS
The results for individual analytes and analyte classes are presented below. Three (3) attachments have also been provided at the end of this document. Attachment 1 briefly summarizes the results reported to-date for all 497 analytes currently in the database to enable users of this report to obtain a quick reference of significant characteristics of any specific analyte. The dates of sample collection, number of samples, numbers of detects, high concentrations with dates and locations, and MDLs are information included in these summary descriptions. Attachment 2 contains EPA EnviroMapper maps identifying monitoring locations, and Attachment 3 contains trend charts for specific analytes.
Benzene and Other Volatile Organic Compounds (VOCs)
The VOC results in the NYC Response database are updated every 2-3 days. The results for twelve (12) select VOCs in air, including benzene, toluene, styrene, ethylbenzene, chlorobenzene, tetrahydrofuran (THF), 2-butanone, propylene, chloromethane, trichlorofluoromethane (Freon 11), dichlorodifluoromethane (Freon 12), and chlorodifluoromethane (Freon 22), from the WTC North and South Towers are presented in the following section and listed in Tables 1 and 2. Note that on several days and for several analytes, more than one (1) sample result has been recorded. All of the VOC data recorded in the NYC Response database as of November 17th has been included. In the case of the VOCs, sample results through November 13t'' are recorded in the database and reported here.
In the NYC Response database, the majority of VOCs detected in air from the WTC North and South Tower sites are hydrocarbons, including aromatices, ketones, alkenes, and others. With the exception of chloromethane and chlorobenzene, we have not found halogenated VOC results in the NYC Response database at levels which compare to the hydrocarbon concentrations. In all of the Lower Manhattan sites examined, the concentrations of benzene and toluene in air appear to maximize at the WTC North Tower Center where the highest concentrations reported were on October 5t", October 11th, and more recently on November 7h, 8th, and 9tt`. The highest benzene in air value was 180,000 ppb on November 8t`'. For styrene, a high value of 180,000 ppb was reported on October 11th.
Our initial calculations indicate that the benzene results from the WTC North and South Tower sites appear largely unrelated with a correlation coefficient of 0.1779 over the thirty-two (32) days with reported values for both sites. This calculation is subject to revision based on more in-depth evaluation of sampling times.
The highest concentration of 1,3-butadiene, an indicator of aliphatic fuel combustion, was 9,200 ppb on November 8' from the North Tower Center. Most (192 of 204) of the results for this compound through November 8t'' were 'not detected' at less than 20 ppb.
Chloromethane was found at concentrations as high as 47,000 ppb on October 20th at the WTC North Tower Center. The results for the three (3) Freons are more intermittent and variable. Chlorodifluoromethane (Freon 22) results are available starting on October 26th. A high value of 960 ppb was reported for chlorodifluoromethane (Freon 22) on November 1St at the
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NYC-WTC_000131053
Fax cover sheet dated February 20, 2002, transmitting chain of custody records related to Pier 40 and West Street.
11 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000095208
Documentation tracking the chain of custody for environmental samples collected from Building #400 at 375 South End Avenue in October 2001.
11 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000121409
Document tracking environmental samples collected from Building #500 at 385 South End Avenue on October 22, 2001.
10 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000120940
Document tracking environmental samples collected from Building #100 at 345 South End Avenue on October 22, 2001.
11 shared non-person entities · 1 shared topics · similarity 0.973
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000114019
Letter and chain of custody document tracking HVAC and environmental inspection samples from 333 Rector Place.
4 shared non-person entities · 1 shared topics · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000161939
Page from a laboratory report containing only formatting characters and no readable content.
10 shared non-person entities · 1 shared topics · similarity 0.972
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000119863
Document tracking environmental samples collected from 365 South End Avenue on October 17, 2001.
9 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000120991
Record documenting the transfer and custody of air samples from Building #100 at 345 South End Avenue collected on October 22, 2001.
10 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000095331
Chain of custody form documenting bulk sampling and air monitoring at 375 South End Avenue on November 17, 2001.
12 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗6 shared non-person entities · 1 shared topics · similarity 0.971
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147006
Form documenting an environmental referral for the World Trade Center site with follow-up status.
13 shared non-person entities · 1 shared topics · similarity 0.970
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000121462
Record documenting the transfer and custody of air samples from Building #500 at 385 South End Avenue collected on October 22, 2001.
11 shared non-person entities · 1 shared topics · similarity 0.970
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NYC-WTC_000130434
Department of Environmental Protection document from January-February 2002 regarding World Trade Center site activities.
Filed in the same folder
Summary of asbestos air sampling results from October 1, 2001, including PCM and TEM standard comparisons for NYC and NJ locations.
Filed in the same folder
NYC-WTC_000130516
Draft special investigative audit report on environmental data from the World Trade Center site prepared by IT Corporation.
Filed in the same folder
Filed in the same folder
NYC-WTC_000130522
Summary of asbestos air sampling results from December 2001 showing all samples below TEM AHERA standards for NYC and Fresh Kills.
Filed in the same folder