4 shared non-person entities · similarity 0.943
machine-extracted · confidence unavailable · Check page ↗Document / 2 pages
Analytical sensitivity comments, 114 Liberty, March 2003
Machine-extracted title · confidence 90%EPA feedback on reporting limits for PAH and asbestos data at 114 Liberty.
NYC-WTC_000155243–000155244Folder label: “114 LIBERTY 1 OF 2”
Page image
OCR text
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
^jlsehan, Michael From: Theodorellys, Penny Sent: Wednesday, March 19, 2003 9:03 AM To: [email protected] Cc: Radhakrishnan, Krish; Gilsenan, Michael; [email protected] Subject: 114 Liberty Sampling
The following are comments received from the USEPA for the analytical data received to date. The analytical sensitivity was an issue I had addressed with you as well. We discussed the matter and you had gotten clarification from the lab. Please contact Mr. Chuck Nace of the USEPA directly and address the comments below. (Chuck Nace, Environmental Toxicologist, USEPA - Region 2 212.637.3459/212.637.4164
Excerpts of the e-mail I received...
^^there are several problems with the reporting limits (i.e., analytical sensitivity). 1) The PAH data indicates that the reporting limit used is 5 ug. This does not allow us to compare the results to the health-based benchmark because the reporting limit is higher than the benchmark. The reporting limit that was supposed to be used was 1 ug (as stated on page 3, item #5 in the scope of work). I hope future PAH analyses can use the appropriate reporting limit as it will result in data that can be compared to the health-based benchmark. 2) The asbestos data indicates that the reporting limit used is 0.0009 s/cc. This is acceptable for comparing to the health-based benchmark but the reporting limit that was supposed to be used was 0.0004 s/cc (as stated on page 4, Asbestos Collection and Analysis, item #2). Using the lower reporting limit will add confidence that the concentrations are below the health-based benchmark rather than being “at” the health-based benchmark and it is also what is being used in our residential cleaning project and it is what was used for 125 Cedar Street. 3) The lead data indicates that the reporting limit used is 20 ug/ft2. Again, this is acceptable for comparing to the health-based benchmark of 25 ug/ft2, but for our projects we used a reporting limit of 2.32 ug/ft2 and a reporting limit of 9 ug/ft2 was used for 125 Cedar Street. A summary of the data I have received to data is presented below: Asbestos - TEM 40 samples at or below the health-based benchmark of 0.0009 (28 were below the reporting limit of 0.0009), 1 above health-based benchmark @ 0.0018 s/cc Asbestos/Fibrous Glass - PCM 3 samples were below the health-based benchmark of 0.01 f/cc and 2 samples were overloaded and could not be analyzed. Lead 13 samples were above the health-based benchmark of 25 ug/ft2 and 17 samples were below the analytical sensitivity of 20 ug/ft2. PAH 30 samples were below the reporting limit of 5ug. The resulting TEF for each sample would be 580 ug/m2 which is above the current health-based benchmark of 300 ug/m2. This is why a reporting limit of 1 ug should be used (i.e., item #1 above)......
1
NYC-WTC_000155243
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000155243Source: 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
No available related records indexed in this group.
Filed elsewhere
NYC-WTC_000101256
Purchase order form from JLC Environmental Consultants dated March 19, 2003 for environmental testing services.
4 shared non-person entities · 1 shared topics · similarity 0.941
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000131053
Fax cover sheet dated February 20, 2002, transmitting chain of custody records related to Pier 40 and West Street.
2 shared non-person entities · 1 shared topics · similarity 0.931
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000130438
Draft special investigative audit report on environmental data from the World Trade Center site prepared by IT Corporation.
3 shared non-person entities · 1 shared topics · similarity 0.929
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000119863
Document tracking environmental samples collected from 365 South End Avenue on October 17, 2001.
2 shared non-person entities · 1 shared topics · similarity 0.929
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000102648
Fragmented text from a Department of Environmental Protection correspondence file within Box 35.
2 shared non-person entities · similarity 0.929
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.
2 shared non-person entities · 1 shared topics · similarity 0.929
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.
2 shared non-person entities · 1 shared topics · similarity 0.929
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.
2 shared non-person entities · 1 shared topics · similarity 0.929
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000120322
Report containing asbestos sampling data and analytical results for 1 Peck Slip dated October 3, 2001.
2 shared non-person entities · 1 shared topics · similarity 0.928
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000147006
Form documenting an environmental referral for the World Trade Center site with follow-up status.
2 shared non-person entities · 1 shared topics · similarity 0.928
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163082
DEP review of revised PAH laboratory results for 114 Liberty identifying concerns about detection limit consistency between original and revised analytical sheets.
1 shared non-person entities · 1 shared topics · similarity 0.927
machine-extracted · confidence unavailable · Check page ↗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.
- 125 Cedar Street · 1 pages · confidence 0.85 · verify page 1
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.
Notice for mandatory pre-bid meeting regarding asbestos abatement scope of work at 125 Cedar Street (110 Liberty Street).
Cited alongside this record in an Ask answer
NYC-WTC_000107433
EPA-DEP coordination regarding cleaning of windows and fire escapes affected by dust from nearby construction and WTC debris removal activities.
Cited alongside this record in an Ask answer
Cited alongside this record in an Ask answer
NYC-WTC_000139196
Correspondence regarding dust accumulation from adjacent facade repointing work in shared airshaft, with commitment to reclean windows and fire escapes.
Cited alongside this record in an Ask answer
Cited alongside this record in an Ask answer