NYC Law Department release
Independent mirror · updated as the City releases more · v1.2.6
← Document results/DEP Box 03/2003 E-Mails Sent M Gilsenan
Document / 24 pages

Indoor dust cleaning program Scope of Work, August 2002

Machine-extracted title · confidence 80%

EPA final scope of work documents for World Trade Center indoor dust cleaning and monitoring program forwarded to NYC project managers.

NYC-WTC_000139029–000139052

Folder label: “2003 E-Mails Sent M Gilsenan

Page image
Scanned page image, NYC-WTC_000139040
OCR text

OCR status: ok · source: pdftotext

NYC 9/11 Public Portal Document

the Cleaning Contractor to reclean as necessary. If all areas are dust fi-ee, then the Project Monitor will authorize final air sampling. Final inspections shall be documented using the Cleaning Checklist.

Deliverables

The Project Monitor shall submit to EPA, upon request, copies of the field notebook pages via e-mail, fax, or alternative agreed upon format.

15. Post Cleaning Air Sampling Procedures a. Sampling shall not begin until a visual inspection confirms the absence of visible dust and debris. Post cleaning air sampling shall be performed upon successful visual inspection and completed within 24 hours. A successful visual inspection shall be an inspection that verifies the absence of dust and debris. b. All surfaces must be completely dry prior to the start of sampling. c. Upon completion of the cleaning, air sampling will be conducted to verify attainment ofthe clean-up criteria. Based on consultation with the resident or owner, aggressive or modified aggressive air sampling will be conducted. Residents shall not be present during aggressive air sampling. 1. Before beginning aggressive air sampling, a 1 horsepower electric leafblower shall be used to direct exhaust air against walls, ceilings, floors and other surfaces. This shall continue for at least five minutes per 1,000 square feet of floor. When directing the exhaust, caution shall be taken to minimize disturbance and potential damage to furnishings and personal belongings ii. Residents shall not be present in their residence during aggressive air sampling activities. iii. Personal protective equipment including disposable clothing, gloves, and respirators shall be worn during aggressive air sampling activities. iv. HVAC systems shall be shut down or isolated locally during aggressive air sampling. V. Room and window air conditioners shall not be operated during aggressive air sampling. vi. Leaf blowers shall not be employed for modified aggressive air sampling. vii. All other procedures are identical for aggressive and modified aggressive air sampling, unless otherwise noted. d. At least one 20-inch fan shall be placed in the center of each room sampled. One fan per 10,000 cubic feet of room space shall be used. The fans shall be operated on slow speed and pointed toward the ceiling. The fans shall run for at least 15 minutes prior to the start of sampling. The fans shall operate continuously throughout sampling and shall not be turned off until sampling is completed. e. For studio apartments 3 air samples shall be collected. For 1-bedroom apartments and above, 5 air samples shall be collected. Sampling equipment shall be placed in living areas and away from obstructions. The sampling cassette must be placed on a

11

NYC-WTC_000139040

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

NYC-WTC_000139040Source: 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.

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.

Compare copies and versions →