NYC Law Department release
Independent mirror · updated as the City releases more · v1.2.6
← Document results/DEP Box 31/114 LIBERTY 2 OF 2
Document / 22 pages

EPA letter to Congress regarding 114 Liberty cleanup, September 2003

Machine-extracted title · confidence 95%

Letter from EPA official to a Congressional representative criticizing the adequacy of the 114 Liberty Street cleanup.

NYC-WTC_000155264–000155285

Folder label: “114 LIBERTY 2 OF 2

Page image
Scanned page image, NYC-WTC_000155277
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

14

114 Liberty St EPA background study of lower Manhattan AVERAGE 11 samples 11 pg/in 45 samples 3.6 pg/m’ FOR ALL SAMPLES 100% 100% High outlier of 259 pg/m® (both detects omitted, as per EPA and non- choice to omit this value detects) AVERAGE 7 samples 5.5 pg/m^ 34 samples 2pg/m^ FOR NON­ DETECTS 64% (arithmetic mean of ’A the 76% (arithmetic mean of % the detection limit of 11 pg/m^) detection limit of 4 pg/m^)

AVERAGE 4 samples 20.85 pg/m^ 11 samples 8.7 pg/m FOR SAMPLES 36% (arithmetic mean of 17.2, 24% High outlier of 259 pg/m® WHERE 19.6,22.1,22.1) omitted, as per EPA SILICA WAS assumption DETECTED

The chart below shows graphically the very marked difference in the distribution between the silica concentrations found at the 114 Liberty building after the EPA cleaning and the EPA background study. Two levels are given for both the 114 Liberty address, and also for the EPA background study. The first value is ’A the detection limit in air, coupled with the percentage of samples with levels below the detection limit. The second value is the average air concentration for those samples where silica was detected, coupled with die percentage of these samples. As can be seen, there is no similarity or significant overlap in the distributions whatsoever.

80%j- 70%- - 60%- - 50%- - 40%. - 30%- - 20%. - 10%- — 0%- - 0 5 10 15 20 25

c □ Midtown Manhattan Background ■ 114 Liberty |

EPA cannot revoke its silica criterion at 114 Liberty based on false contention that background levels in NYC are already at unsafe levels Even if silica background levels in midtown Manhattan are in fact above benchmarks, EPA cannot excuse similar high levels at 114 Liberty and claim that it has no responsibility for abating it. If EPA has in fact identified silica health risks in other NYC residences not impacted

NYC-WTC_000155277

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

NYC-WTC_000155277Source: 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_000091539 · Box DEP Box 68

Raw laboratory sequence file listing pesticide compounds and calibration standards processed in late 2001.

Cited alongside this record in an Ask answer

Compare copies and versions →