NYC Law Department release
Independent mirror · updated as the City releases more · v1.2.6
← Document results/DEP Box 53/E-Mail 1/2/02
Document / 78 pages

Special Investigative Audit #14 Draft, WTC Site, Nov 2001

Machine-extracted title · confidence 95%

Draft special investigative audit report on environmental data from the World Trade Center site prepared by IT Corporation.

NYC-WTC_000130438–000130515

Folder label: “E-Mail 1/2/02

Page image
Scanned page image, NYC-WTC_000130442
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

The approach used by IT QATS in evaluating the NYC data involves a systematic series of steps.

• Each analyte in the NYC Response Data Monitoring database is accessed for all 75 sample information fields, allowing all available data to be downloaded into spreadsheet files. The Predefined HTML Output and 'Hot Map' results for select analytes are also printed for review and data entry in customized spreadsheets. • The data in each spreadsheet are first sorted by media, detected results, and result concentrations to determine the number of detects and whether they are present in significant concentrations. • If there are a large number of detects by media type, the data are sorted by address and sample collection date to establish concentration versus time. • Summaries of analyte characteristics including the numbers of samples collected by media type, number of detects, concentration range of detected analytes, method detection limits (MDLs), unusually high concentrations, etc., are recorded. • For analytes of interest to EPA, or those with elevated concentrations, graphs are created illustrating trends of concentration versus time by location, and linear trend lines are plotted. • Analytes of a particular class are evaluated for correlation, and graphs are plotted. Correlation statistics for multiple analytes are calculated and trend plots are prepared. Regression analysis for benzene at the two WTC Tower sites has also been performed.

Other factors, such as weather conditions or potential quality issues, are evaluated and discussed if they appear to be relevant to the observed results.

Page 3 of

NYC-WTC 000130442

OCR can misread numbers and units. Confirm readings against the page image before using them.

NYC-WTC_000130442Source: NYC Law Department, mirrored locally

Related records

Browse subjects →

Ranked by indexed similarity. Reasons describe shared subjects and filing context; check the source records.

Same-box records

Filed elsewhere

More like this page

Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.

Page similarity is temporarily unavailable or this page has no indexed vector.

Buildings in this record

Machine-extracted building matches; verify each source. Buildings, never households.

Others also read

Readers open these alongside this record — through an Ask answer, the same folder, or indexed similarity. Not a claim they are about the same event.

NYC-WTC_000130435 · Box DEP Box 53

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

Compare copies and versions →