NYC-WTC_000105943
Blank memo form with redacted fields for 225 Broadway.
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machine-extracted · confidence unavailable · Check page ↗Document / 43 pages
Air sampling and cleaning report for 70 Battery Place, November
Machine-extracted title · confidence 95%Letter enclosing air sampling results and cleaning documentation for 70 Battery Place following September 11.
NYC-WTC_000105263–000105305Folder label: “70 BATTERY PLACE; Block: 16 Lot: 20 BIN: 1085778”
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NYC 9/11 Public Portal Document
01/30/02 15:37 NO.975 907
Enviro Techniques, Inc, 22 California Avenue,Paterson, NJ 07503 o (973)684-0202
October 11, 2001
Mr. Sal Panico Urban Associates, LLC. 400 West 59th Street New York, NY 10019
Re: Asbestos Air Quality Sampling at: River Watch 70 Battery Place New York, New York 10280
Dear Mr. Sal Panico: referenced building. Enviro Techniques, Inc. conducted air quality sampling at the above Contrast Microscopy. All samples were collected and analyzed by NIOSH 7400 method using Phase ester fiber filters with a Airborne asbestos fibers were collected on millipore type AA mixed cellulose stage plastic cassettes diameter of 25mm and a pore size of 0.8 µm. The filters were housed in three The top piece of each cassette was and connected by Tygon tubing to portable air sampling pumps. the NIOSH method. This removed during sampling, providing the open faced collection called for by provides an even distribution of fibers onto the filters. and models of these Precision portable air sampling pumps were, used for sample collection. The make 1531-1070-Cf288X, Dawson and high volume pumps are Speedaire 4Z791, Speedaire 4X792, Gast 16.0 liters per minute. All Allegro equivalents. These pumps operate at flow rates between 5.0 and sampling period using a precision rotometer pumps are calibrated at the beginning and the end of each Following sampling, the samples were which is calibrated against a primary standard in our laboratory. was archived at our analyzed using Phase Contrast Microscopy. The non analyzed portion of the filter laboratory. . other airborne fibers. The criteria The NIOSH 7400 method does not distinguish asbestos fibers from Under this methodology specified in the method for counting fibers are size and length to width ratio. airborne contaminants. all fibers which meet these criteria are counted to determine the concentration of all airborne fibers above a certain The results achieved by this method represent the concentrations of size.
NYC-WTC 000105295
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NYC-WTC_000105295Source: NYC Law Department, mirrored locally
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