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Asbestos air sampling methodology 114 Liberty, Feb 2003
Machine-extracted title · confidence 85%Technical correspondence addressing asbestos air sampling methodology and pump flow rate specifications.
NYC-WTC_000155430–000155437Folder label: “114 LIBERTY 2 OF 2”
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OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
Gilsenan, Michael From: Maddaloni.MarkigepannaiI.epa.gov Sent: Thursday, February 06, 2003 6:10 PM To: Theodorellys, Penny Cc: [email protected]; Radhakrishnan, Krish; Gilsenan, Michael Subject: Re: 114 Liberty Street Monitoring Contractor Specifications
114 Liberty St Monitoring 2 6 ... Penny, There are still a few loose threads re: the asbestos air sampling rates. Page 2 (Equipment) The protocol calls for pumps with a flow rate capacity of 2 - 10 liters/min but bullet #6 on page 5 (NIOSH 7400 method) calls for a flow rate of 10 - 15 liters per min. On a related subject, the NIOSH 7400 method specifies a flow rate of .5 - 16 liters/min (and a minimum volume of 400 liters) but we want the large (3,600 liter) sample volumes, and therefore high flow rates (approx 10 liters/min) , to attain the necessary detection limits for the TEM analysis. Page 4 (Asbestos Air Monitoring) bullet # 2 The protocol calls for a flow rate not to exceed 3 liters/min. At that rate it would take 20 hours to get the desired sample volume of 3,600 liters.
"Theodorellys, Penny" To: Mark Maddaloni/R2/USEPA/US@EPA, Charles <ptheodorellysiade Nace/R2/USEPA/US@EPA p.nyc.gov> cc: "Radhakrishnan, Krish" <kradhakrishnan@dep .nyc.gov>, "Gilsenan, Michael" 02/06/2003 02:53 <mgilsenan@dep .nyc.gov> PM Subject: 114 Liberty Street Monitoring Contractor Specifications
«114 Liberty St Monitoring 2 6 O3.doc»
Attached please find the revised monitoring specification with your comments included. I am awaiting the attachments referenced in your correspondence and will include your reporting guidelines. We will be moving forward quickly and I would appreciate any other feedback as soon as possible. Thanks again, the inclusion of the language for the changes was very helpful. Please confirm receipt and review of this document. 1
NYC-WTC_000155430
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NYC-WTC_000155430Source: NYC Law Department, mirrored locally
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