NYC 9/11 Public Portal Document
NORTH ATLANTIC LABORATORIES. INC.
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too SwEeNeYDAL.E Ave. Ba* shore, NY 11706 (631) 381-0400
FAXs (631) 351-0410
ats-rOBER 1 44-( 2001
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Fireman's Funs inburancc Qompany
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Rei Airborne as b eh to b Tehting @ Penthouse C, aas rector
Place
NORTH ATLANTIC LABDRATCRIEBf iNC. HAS CONDUCTED AIR DUALITY
TESTING FOR AIRBORNE ASBESTOH AT THE ABOVE REFERENCED
APARTMENT.
The anauvtidau MeTHOsauasY for AiRsaRNe AasESTas was ubins
Phase Contrast MicRoacaPY tPDMl under the NIOSH 74DC
METHOD. This method counts auu fibers that demonstrate a 3n
LENGTH TO WIDTH RATIO THAT ARE LARDER THAN 5 MICRONB
tMIM-IDNTWQ OF A METER) IN SIZE.
A total of five area samples were COLLECTED FROM THE
APARTMENT. ANALYSIS REVEALED THAT FOUR OF THE FIVE SAMPLES
WERE WITHIN THE PERMISSIBLE EXPOSURE LIMIT (PSD OF 0.1 FIBERS
PER CUBIC CENTIMETER OF AIR (F/CD> AS ESTABLISHED BY THE 08
DOL^s Occupational and safety and Health Administration
i
(OBHA). These four samples did however exceed the more 1
STR I NS ENT ASBEBTOa PROUECT BLEARANCE CRITERIA OF 0.01 F/CC AB
.ebtablibhep SY New York State Industrial Dope Rule 56.
The fifth sample wab overloaded with particulate matter, and
THEREFORE COULD NOT BE ANALYZED. THIS IB BELIEVED TO BE
LARBELY ATTRIBUTABLE TO THE CONDITIONS AT THE TIME OF TESTING;
PERSONS WERE SHAKING OUT RUBS IN THE AREA.
FUTHER, it (S LIKELY THAT THE FOUR ELEVATED READINGS OBTAINED
ARE NOT WHOLLY REPRESENTATIVE OF AIRBORNE ASBESTOS
CONCENTRATIONS. RATHER OTHER PARTICULATE (I.E. FIO ERG LASS,
OELLULOSe) THAT HAVE UPWARDLY BIASED THE RESULTS. IT IS
RECOMMENDED THAT THIS PRESUMPTION BE CONFIRMED SY REMANDING
THESE FOUR SAMPLES FOR THE AESEBTOS SPECIFIC TRANSMISISON
electron MICROBOPY (TEM) METHOD FOR A TO OBTAIN A DEFINITIVE
I
RESULT.
I
NYC-WTC_000154612
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