OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
ofthe collection of3 pre clean-up and 3 post clean-up wipe samples for total metals and mercury (Note: a separate wipe sample is require for analysis for mercury). All wipe samples will be collected in accordance with procedures specified in HUD Appendix 13.1.
b. Samples must be labeled and accompanied with completed chain ofcustody forms before shipping to the designated laboratory. The label must include the EPA Project Tracking Number. Samples will be packed, sealed and shipped to USEPA Contract Laboratory for analysis. Metals samples will be analyzed using EPA Method SW-846 601 OB. Mercury samples will be analyzed using EPA Method SW-846 7471.
17. Post Clean-up Air Sampling Procedures a. Sampling shall not begin until a visual inspection confirms the absence ofvisible dust and debris. Post cleaning air sampling shall be completed within 24-hours ofthe completion of cleaning activities. b. All surfaces must be completely dry prior to the start of sampling. c. Window air conditioning units where applicable shall be run/operated at least 15 minutes prior to the start of sampling. The air conditioning units shall operate continuously throughout the sampling. d. Based on consultation with resident, aggressive or modified aggressive air sampling will be conducted upon completion ofcleaning. Before the start ofsampling, forced air equipment (such as a 1 horsepower electric leafbiower) may be used to direct exhaust air against walls, ceilings, floors and other surfaces. When directing the exhaust, caution shall be taken to minimize disturbance and potential damage to fijmishings and personal belongings. e. One 20-inch fan shall be installed per 10,000 cubic feet of room space and run at low speed. The fan shall operate continuously throughout sampling and shall not be turned off until sampling is completed. f. For studio apartments 3 samples shall be collected. For 1-bedroom apartments and above 5 samples shall be collected. Sampling equipment shall be placed in living areas and away fi-om obstructions. The sampling cassette must be placed on a tripod and not taped to existing surfaces. g- Common spaces will be sampled without the use offorced air devices (fans, leafblowers etc). For small spaces, less than 260 linear feet and 160 square feet, 3 samples will be collected. For large spaces greater than 260 linear feet or 160 square feet and less than 25,000 square feet 5 samples will be collected. For spaces greater than 25,000 square feet, 1 sample will be collected for each 5,000 square feet. Sampling equipment shall be placed away fi-om obstructions. The sampling cassette must be placed on a tripod and not taped to existing surfaces. h. Asbestos air samples shall be collected in accordance with the procedures specified in NIOSH Method 7400. Air sampling pumps will be operated at 10 liters per minute for eight (8) hours to achieve the maximum volume requirement of4800 liters.
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NYC-WTC_000139442
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NYC-WTC_000138743
EPA circulates latest draft scopes of work for WTC indoor dust cleaning program requesting comments.
15 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138659
Circulation of latest draft cleaning and monitoring statement of works for WTC for review and comment.
14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.999
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138626
Distribution of revised scopes of work documents for WTC indoor cleaning and monitoring contracts.
15 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139232
DEP requests review of attached Scope of Work documents for mold remediation and air monitoring contracts.
11 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138725
EPA transmits revised scopes of work for WTC indoor cleaning and monitoring contracts to DEP.
14 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000139209
Administrative notice instructs staff to preserve original World Trade Center documents for potential litigation.
11 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000138918
Internal DEP correspondence discussing EPA draft scope of work for WTC program and clarifying agency roles and responsibilities.
11 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗13 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000162352
EPA request for review and feedback on draft scope of work documents for WTC cleaning and air monitoring contractors.
14 shared non-person entities · 1 shared topics · similarity 1.000
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000161167
Forwarded draft Statements of Work for cleaning and monitoring activities requiring review by noon.
14 shared non-person entities · 1 shared topics · similarity 0.998
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000161325
Final scope of work documents for indoor dust cleaning and monitoring contractor activities in WTC cleanup program.
13 shared non-person entities · 1 shared topics · similarity 0.992
machine-extracted · confidence unavailable · Check page ↗Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
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NYC-WTC_000139208
Instructional notice requiring retention of scanned WTC documents as potential evidence in future legal actions against the City.
Filed in the same folder
NYC-WTC_000139209
Administrative notice instructs staff to preserve original World Trade Center documents for potential litigation.
Filed in the same folder
NYC-WTC_000139232
DEP requests review of attached Scope of Work documents for mold remediation and air monitoring contracts.
Filed in the same folder
NYC-WTC_000139257
DEP official requests final review of the latest air monitoring Scope of Work to conclude negotiations.
Filed in the same folder
Filed in the same folder