Document from 55 Liberty Street Folder

NYC 9/11 Public Portal Document

FROM :. GPAGAMGMUJGDA !-PX NO. : 21276613 2002 OE:4GPM P4

55 Liberty Apt 5A

Exposure CVjataTla

The ASTM method is intended fbr guidance on txaminingThere dust contamineOn of build surfaces and as a gener*L assessment of the building. is no suggestion in the risk from asbestos expoatuc, ASTM u athod that it can be used to assess ganeisl health nor does it suggest that all building surfaces be maintained to the levels published ial the concentration of standard. The method is generally applicable for the estimation of thesquare eaontln'teter $bats per asbestos fibers on surfaces starting from approximatelY It100 when the fibers are inhaled (S'cm2). Asbestos is a human oareiaogeax and eeposurs occurs may result in into the hugs. The presence of elevated levels of asbestos dust on surf3sees exposure to asbestos. agorae fibers if the dust is disturbed This may result in Increased msterlale in them we have found a level of 10,000 In buildings with asbestos containing settled hest. There structures pa square centimeter to be a reasonable baseline level in she level of 1000 were no suspect asbestos contalang materials in the aparr ant and s/otts2 is used as a standard. 1mit of 0.01 fibers per The Stitt of New You lies recommended an airborne cxposaae maistialaed to a'Level as cubic ccad meter, however, exposure to MY carcinogen should be level of low as reasonable achievable. This method doss not provide t for ation on the settled onto asbestos airborne exposure. but instead provides an aesessmenn of the level of should exposure surfaces but it may provide information on the potential for contaminated duct become airborne_

Fkidl ap aid window A visual inspection reveled the presence of heavy dust on the wiaadows frames. The I er window was open n the master bedroom and in the bathrooci.

DUST. san3DIG reVlts ssbestas Seven rniarovac dt,X sample and a blank were coilected to determine levels of duet in the couch, linen ocver o0 the couch, on the floor, on a chair, and on they windows. The following sununssizes the results. The preliminary lab report is attached to this report. Sample #1 — The field blank had no aaructures detected on the filter material. This is an sooeptable level for a field blank.

Sample *2— Taken frcm the couch in the living room. The couch had been cleaned entered twice, but it was located near the terrace door where the most debris reportedly the aparaneat. The sample had 5,550 s/cm2. This exceeds the recommended *. 000 adora2 limit

Sample *3— This sample was taken from they linen cover on to couch. The cover bad been dry cleaned twice. It had reportedly been covered with a layer of dust alter the building collapse. The sample bad 1850 sicm2. This is a low level but is slightly above the 1000 s/cxn2 limit.

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